diff --git a/example/lib/main.dart b/example/lib/main.dart
index 3ab265f..243f8af 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -56,7 +56,7 @@ class _MyHomePageState extends State<MyHomePage> {
   bool loading = true;
 
   void load() async {
-    var binding = ManualBinding(widget.interpreter);
+    var binding = DefaultBindingHander(widget.interpreter);
     await widget.interpreter.init();
     binding.loadExternalFunctionTypes();
     binding.loadExternalClasses();
@@ -86,42 +86,8 @@ class _MyHomePageState extends State<MyHomePage> {
           // the App.build method, and use it to set our appbar title.
           title: Text(widget.title),
         ),
-        body: loading ? CircularProgressIndicator() : ScriptController(widget.interpreter));
-  }
-}
-
-class ManualBinding extends DefaultBindingHander {
-  ManualBinding(Hetu interpreter) : super(interpreter);
-
-  @override
-  void loadExternalFunctionTypes() {
-    super.loadExternalFunctionTypes();
-
-    final functionWrappers = <String, HTExternalFunctionTypedef>{
-      'ValueChangedInt': (HTFunction function) => (int data) => function.call(positionalArgs: [data]),
-      'ValueChangedDouble': (HTFunction function) => (double data) => function.call(positionalArgs: [data]),
-      'ValueChangedString': (HTFunction function) => (String data) => function.call(positionalArgs: [data]),
-      'ValueChangedBool': (HTFunction function) => (bool data) => function.call(positionalArgs: [data]),
-      'ValueChangedList': (HTFunction function) => (List data) => function.call(positionalArgs: [data]),
-      'ValueChangedMap': (HTFunction function) => (Map data) => function.call(positionalArgs: [data]),
-      'ValueChangedSet': (HTFunction function) => (Set data) => function.call(positionalArgs: [data]),
-    };
-
-    functionWrappers.forEach((key, value) {
-      interpreter.bindExternalFunctionType(key, value);
-    });
-  }
-
-  @override
-  void loadExternalClasses() {
-    super.loadExternalClasses();
-  }
-
-  @override
-  Future importScripts() {
-    var future = super.importScripts();
-    var futures = <Future>[];
-    futures.add(future);
-    return Future.wait(futures);
+        body: loading
+            ? CircularProgressIndicator()
+            : ScriptController(widget.interpreter));
   }
 }
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 5f23d55..82bc5b4 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -73,7 +73,7 @@ packages:
       name: hetu_script
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.1.0+3"
+    version: "0.1.1+1"
   matcher:
     dependency: transitive
     description:
@@ -95,6 +95,20 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.8.0"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.0"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.1"
   script_widget:
     dependency: "direct main"
     description:
diff --git a/ht-lib/dart/core/double.ht b/ht-lib/dart/core/double.ht
deleted file mode 100644
index a4a5298..0000000
--- a/ht-lib/dart/core/double.ht
+++ /dev/null
@@ -1,9 +0,0 @@
-external class double {
-    static fun parse (source, onError)
-    static fun tryParse (source)
-    static const nan
-    static const infinity
-    static const negativeInfinity
-    static const minPositive
-    static const maxFinite
-}
diff --git a/ht-lib/dart/core/int.ht b/ht-lib/dart/core/int.ht
deleted file mode 100644
index 3f335b0..0000000
--- a/ht-lib/dart/core/int.ht
+++ /dev/null
@@ -1,25 +0,0 @@
-external class int {
-    construct fromEnvironment
-    fun modPow
-    fun modInverse
-    fun gcd
-    get isEven
-    get isOdd
-    get bitLength
-    fun toUnsigned
-    fun toSigned
-    fun abs
-    get sign
-    fun round
-    fun floor
-    fun ceil
-    fun truncate
-    fun roundToDouble
-    fun floorToDouble
-    fun ceilToDouble
-    fun truncateToDouble
-    fun toString
-    fun toRadixString
-    static fun parse (source, {radix, onError})
-    static fun tryParse (source, {radix})
-}
diff --git a/ht-lib/package/widget.ht b/ht-lib/package/widget.ht
index 65aaff3..2bf9406 100644
--- a/ht-lib/package/widget.ht
+++ b/ht-lib/package/widget.ht
@@ -1,8 +1,9 @@
 class Widget {
+    
+    external static fun _rebuild(instance)
+
     ///Dart宿主对象
     var host
-    
-    external fun _rebuild(instance)
 
     //重建Widget的方法，由Dart赋值
     fun rebuild {
@@ -18,7 +19,7 @@ class Widget {
     fun init() {}
 
     ///用于创建一个Dart Widget，必须override并返回一个Widget
-    fun build(context)
+    fun build(context) {}
 
     fun dispose() {
       host = null
diff --git a/lib/bindings/dart/async/async_error.g.dart b/lib/bindings/dart/async/async_error.g.dart
index f6a384a..a87b922 100644
--- a/lib/bindings/dart/async/async_error.g.dart
+++ b/lib/bindings/dart/async/async_error.g.dart
@@ -8,11 +8,13 @@ class AsyncErrorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AsyncError':
-        return ({positionalArgs, namedArgs, typeArgs}) => AsyncError(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AsyncError(positionalArgs[0], positionalArgs[1]);
       case 'AsyncError.defaultStackTrace':
-        return ({positionalArgs, namedArgs, typeArgs}) => AsyncError.defaultStackTrace(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AsyncError.defaultStackTrace(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +28,7 @@ extension AsyncErrorBinding on AsyncError {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AsyncError');
+        return const HTType('AsyncError');
       case 'error':
         return error;
       case 'stackTrace':
@@ -34,7 +36,7 @@ extension AsyncErrorBinding on AsyncError {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/async/deferred_load.g.dart b/lib/bindings/dart/async/deferred_load.g.dart
index aada0cf..a35f005 100644
--- a/lib/bindings/dart/async/deferred_load.g.dart
+++ b/lib/bindings/dart/async/deferred_load.g.dart
@@ -8,9 +8,10 @@ class DeferredLoadExceptionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DeferredLoadException':
-        return ({positionalArgs, namedArgs, typeArgs}) => DeferredLoadException(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DeferredLoadException(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,11 +25,11 @@ extension DeferredLoadExceptionBinding on DeferredLoadException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DeferredLoadException');
+        return const HTType('DeferredLoadException');
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/async/future.g.dart b/lib/bindings/dart/async/future.g.dart
index 6493e8f..6447851 100644
--- a/lib/bindings/dart/async/future.g.dart
+++ b/lib/bindings/dart/async/future.g.dart
@@ -11,7 +11,7 @@ class TimeoutExceptionAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             TimeoutException(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +25,7 @@ extension TimeoutExceptionBinding on TimeoutException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TimeoutException');
+        return const HTType('TimeoutException');
       case 'message':
         return message;
       case 'duration':
@@ -33,7 +33,7 @@ extension TimeoutExceptionBinding on TimeoutException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/async/timer.g.dart b/lib/bindings/dart/async/timer.g.dart
index e2b97ad..c3876c0 100644
--- a/lib/bindings/dart/async/timer.g.dart
+++ b/lib/bindings/dart/async/timer.g.dart
@@ -8,13 +8,16 @@ class TimerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Timer':
-        return ({positionalArgs, namedArgs, typeArgs}) => Timer(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Timer(positionalArgs[0], positionalArgs[1]);
       case 'Timer.periodic':
-        return ({positionalArgs, namedArgs, typeArgs}) => Timer.periodic(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Timer.periodic(positionalArgs[0], positionalArgs[1]);
       case 'Timer.run':
-        return ({positionalArgs, namedArgs, typeArgs}) => Timer.run(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Timer.run(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +31,7 @@ extension TimerBinding on Timer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Timer');
+        return const HTType('Timer');
       case 'tick':
         return tick;
       case 'isActive':
@@ -36,7 +39,7 @@ extension TimerBinding on Timer {
       case 'cancel':
         return ({positionalArgs, namedArgs, typeArgs}) => cancel();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/async/zone.g.dart b/lib/bindings/dart/async/zone.g.dart
index b655052..cf49efb 100644
--- a/lib/bindings/dart/async/zone.g.dart
+++ b/lib/bindings/dart/async/zone.g.dart
@@ -9,40 +9,81 @@ class ZoneSpecificationAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ZoneSpecification':
         return ({positionalArgs, namedArgs, typeArgs}) => ZoneSpecification(
-            handleUncaughtError: namedArgs.containsKey('handleUncaughtError') ? namedArgs['handleUncaughtError'] : null,
+            handleUncaughtError: namedArgs.containsKey('handleUncaughtError')
+                ? namedArgs['handleUncaughtError']
+                : null,
             run: namedArgs.containsKey('run') ? namedArgs['run'] : null,
-            runUnary: namedArgs.containsKey('runUnary') ? namedArgs['runUnary'] : null,
-            runBinary: namedArgs.containsKey('runBinary') ? namedArgs['runBinary'] : null,
-            registerCallback: namedArgs.containsKey('registerCallback') ? namedArgs['registerCallback'] : null,
+            runUnary: namedArgs.containsKey('runUnary')
+                ? namedArgs['runUnary']
+                : null,
+            runBinary: namedArgs.containsKey('runBinary')
+                ? namedArgs['runBinary']
+                : null,
+            registerCallback: namedArgs.containsKey('registerCallback')
+                ? namedArgs['registerCallback']
+                : null,
             registerUnaryCallback:
-                namedArgs.containsKey('registerUnaryCallback') ? namedArgs['registerUnaryCallback'] : null,
+                namedArgs.containsKey('registerUnaryCallback')
+                    ? namedArgs['registerUnaryCallback']
+                    : null,
             registerBinaryCallback:
-                namedArgs.containsKey('registerBinaryCallback') ? namedArgs['registerBinaryCallback'] : null,
-            errorCallback: namedArgs.containsKey('errorCallback') ? namedArgs['errorCallback'] : null,
-            scheduleMicrotask: namedArgs.containsKey('scheduleMicrotask') ? namedArgs['scheduleMicrotask'] : null,
-            createTimer: namedArgs.containsKey('createTimer') ? namedArgs['createTimer'] : null,
-            createPeriodicTimer: namedArgs.containsKey('createPeriodicTimer') ? namedArgs['createPeriodicTimer'] : null,
+                namedArgs.containsKey('registerBinaryCallback')
+                    ? namedArgs['registerBinaryCallback']
+                    : null,
+            errorCallback: namedArgs.containsKey('errorCallback')
+                ? namedArgs['errorCallback']
+                : null,
+            scheduleMicrotask: namedArgs.containsKey('scheduleMicrotask')
+                ? namedArgs['scheduleMicrotask']
+                : null,
+            createTimer: namedArgs.containsKey('createTimer')
+                ? namedArgs['createTimer']
+                : null,
+            createPeriodicTimer: namedArgs.containsKey('createPeriodicTimer')
+                ? namedArgs['createPeriodicTimer']
+                : null,
             print: namedArgs.containsKey('print') ? namedArgs['print'] : null,
             fork: namedArgs.containsKey('fork') ? namedArgs['fork'] : null);
       case 'ZoneSpecification.from':
-        return ({positionalArgs, namedArgs, typeArgs}) => ZoneSpecification.from(positionalArgs[0],
-            handleUncaughtError: namedArgs.containsKey('handleUncaughtError') ? namedArgs['handleUncaughtError'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => ZoneSpecification.from(
+            positionalArgs[0],
+            handleUncaughtError: namedArgs.containsKey('handleUncaughtError')
+                ? namedArgs['handleUncaughtError']
+                : null,
             run: namedArgs.containsKey('run') ? namedArgs['run'] : null,
-            runUnary: namedArgs.containsKey('runUnary') ? namedArgs['runUnary'] : null,
-            runBinary: namedArgs.containsKey('runBinary') ? namedArgs['runBinary'] : null,
-            registerCallback: namedArgs.containsKey('registerCallback') ? namedArgs['registerCallback'] : null,
+            runUnary: namedArgs.containsKey('runUnary')
+                ? namedArgs['runUnary']
+                : null,
+            runBinary: namedArgs.containsKey('runBinary')
+                ? namedArgs['runBinary']
+                : null,
+            registerCallback: namedArgs.containsKey('registerCallback')
+                ? namedArgs['registerCallback']
+                : null,
             registerUnaryCallback:
-                namedArgs.containsKey('registerUnaryCallback') ? namedArgs['registerUnaryCallback'] : null,
+                namedArgs.containsKey('registerUnaryCallback')
+                    ? namedArgs['registerUnaryCallback']
+                    : null,
             registerBinaryCallback:
-                namedArgs.containsKey('registerBinaryCallback') ? namedArgs['registerBinaryCallback'] : null,
-            errorCallback: namedArgs.containsKey('errorCallback') ? namedArgs['errorCallback'] : null,
-            scheduleMicrotask: namedArgs.containsKey('scheduleMicrotask') ? namedArgs['scheduleMicrotask'] : null,
-            createTimer: namedArgs.containsKey('createTimer') ? namedArgs['createTimer'] : null,
-            createPeriodicTimer: namedArgs.containsKey('createPeriodicTimer') ? namedArgs['createPeriodicTimer'] : null,
+                namedArgs.containsKey('registerBinaryCallback')
+                    ? namedArgs['registerBinaryCallback']
+                    : null,
+            errorCallback: namedArgs.containsKey('errorCallback')
+                ? namedArgs['errorCallback']
+                : null,
+            scheduleMicrotask: namedArgs.containsKey('scheduleMicrotask')
+                ? namedArgs['scheduleMicrotask']
+                : null,
+            createTimer: namedArgs.containsKey('createTimer')
+                ? namedArgs['createTimer']
+                : null,
+            createPeriodicTimer: namedArgs.containsKey('createPeriodicTimer')
+                ? namedArgs['createPeriodicTimer']
+                : null,
             print: namedArgs.containsKey('print') ? namedArgs['print'] : null,
             fork: namedArgs.containsKey('fork') ? namedArgs['fork'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -53,20 +94,32 @@ class ZoneSpecificationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'HandleUncaughtErrorHandler': (HTFunction function) => (self, parent, zone, error, stackTrace) =>
-          function.call(positionalArgs: [self, parent, zone, error, stackTrace], namedArgs: const {}),
-      'ErrorCallbackHandler': (HTFunction function) => (self, parent, zone, error, stackTrace) =>
-          function.call(positionalArgs: [self, parent, zone, error, stackTrace], namedArgs: const {}) as AsyncError?,
+      'HandleUncaughtErrorHandler': (HTFunction function) =>
+          (self, parent, zone, error, stackTrace) => function.call(
+              positionalArgs: [self, parent, zone, error, stackTrace],
+              namedArgs: const {}),
+      'ErrorCallbackHandler': (HTFunction function) =>
+          (self, parent, zone, error, stackTrace) => function.call(
+              positionalArgs: [self, parent, zone, error, stackTrace],
+              namedArgs: const {}) as AsyncError?,
       'ScheduleMicrotaskHandler': (HTFunction function) =>
-          (self, parent, zone, f) => function.call(positionalArgs: [self, parent, zone, f], namedArgs: const {}),
-      'CreateTimerHandler': (HTFunction function) => (self, parent, zone, duration, f) =>
-          function.call(positionalArgs: [self, parent, zone, duration, f], namedArgs: const {}) as Timer,
-      'CreatePeriodicTimerHandler': (HTFunction function) => (self, parent, zone, period, f) =>
-          function.call(positionalArgs: [self, parent, zone, period, f], namedArgs: const {}) as Timer,
-      'PrintHandler': (HTFunction function) =>
-          (self, parent, zone, line) => function.call(positionalArgs: [self, parent, zone, line], namedArgs: const {}),
-      'ForkHandler': (HTFunction function) => (self, parent, zone, specification, zoneValues) =>
-          function.call(positionalArgs: [self, parent, zone, specification, zoneValues], namedArgs: const {}) as Zone,
+          (self, parent, zone, f) => function.call(
+              positionalArgs: [self, parent, zone, f], namedArgs: const {}),
+      'CreateTimerHandler': (HTFunction function) =>
+          (self, parent, zone, duration, f) => function.call(
+              positionalArgs: [self, parent, zone, duration, f],
+              namedArgs: const {}) as Timer,
+      'CreatePeriodicTimerHandler': (HTFunction function) =>
+          (self, parent, zone, period, f) => function.call(
+              positionalArgs: [self, parent, zone, period, f],
+              namedArgs: const {}) as Timer,
+      'PrintHandler': (HTFunction function) => (self, parent, zone, line) =>
+          function.call(
+              positionalArgs: [self, parent, zone, line], namedArgs: const {}),
+      'ForkHandler': (HTFunction function) =>
+          (self, parent, zone, specification, zoneValues) => function.call(
+              positionalArgs: [self, parent, zone, specification, zoneValues],
+              namedArgs: const {}) as Zone,
     };
   }
 }
@@ -75,7 +128,7 @@ extension ZoneSpecificationBinding on ZoneSpecification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ZoneSpecification');
+        return const HTType('ZoneSpecification');
       case 'handleUncaughtError':
         return handleUncaughtError;
       case 'run':
@@ -103,7 +156,7 @@ extension ZoneSpecificationBinding on ZoneSpecification {
       case 'fork':
         return fork;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -119,7 +172,7 @@ class ZoneAutoBinding extends HTExternalClass {
       case 'Zone.root':
         return Zone.root;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/ascii.g.dart b/lib/bindings/dart/convert/ascii.g.dart
index 0e0db0b..bdd7189 100644
--- a/lib/bindings/dart/convert/ascii.g.dart
+++ b/lib/bindings/dart/convert/ascii.g.dart
@@ -8,10 +8,12 @@ class AsciiCodecAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AsciiCodec':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            AsciiCodec(allowInvalid: namedArgs.containsKey('allowInvalid') ? namedArgs['allowInvalid'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => AsciiCodec(
+            allowInvalid: namedArgs.containsKey('allowInvalid')
+                ? namedArgs['allowInvalid']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +27,7 @@ extension AsciiCodecBinding on AsciiCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AsciiCodec');
+        return const HTType('AsciiCodec');
       case 'name':
         return name;
       case 'encoder':
@@ -33,14 +35,19 @@ extension AsciiCodecBinding on AsciiCodec {
       case 'decoder':
         return decoder;
       case 'encode':
-        return ({positionalArgs, namedArgs, typeArgs}) => encode(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encode(positionalArgs[0]);
       case 'decode':
-        return ({positionalArgs, namedArgs, typeArgs}) => decode(List<int>.from(positionalArgs[0]),
-            allowInvalid: namedArgs.containsKey('allowInvalid') ? namedArgs['allowInvalid'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => decode(
+            List<int>.from(positionalArgs[0]),
+            allowInvalid: namedArgs.containsKey('allowInvalid')
+                ? namedArgs['allowInvalid']
+                : null);
       case 'decodeStream':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeStream(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeStream(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,7 +61,7 @@ class AsciiEncoderAutoBinding extends HTExternalClass {
       case 'AsciiEncoder':
         return ({positionalArgs, namedArgs, typeArgs}) => AsciiEncoder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -68,20 +75,25 @@ extension AsciiEncoderBinding on AsciiEncoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AsciiEncoder');
+        return const HTType('AsciiEncoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => convert(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -93,10 +105,12 @@ class AsciiDecoderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AsciiDecoder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            AsciiDecoder(allowInvalid: namedArgs.containsKey('allowInvalid') ? namedArgs['allowInvalid'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => AsciiDecoder(
+            allowInvalid: namedArgs.containsKey('allowInvalid')
+                ? namedArgs['allowInvalid']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,20 +124,25 @@ extension AsciiDecoderBinding on AsciiDecoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AsciiDecoder');
+        return const HTType('AsciiDecoder');
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(List<int>.from(positionalArgs[0]),
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => convert(
+            List<int>.from(positionalArgs[0]),
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/base64.g.dart b/lib/bindings/dart/convert/base64.g.dart
index 85f4f32..608389e 100644
--- a/lib/bindings/dart/convert/base64.g.dart
+++ b/lib/bindings/dart/convert/base64.g.dart
@@ -12,7 +12,7 @@ class Base64CodecAutoBinding extends HTExternalClass {
       case 'Base64Codec.urlSafe':
         return ({positionalArgs, namedArgs, typeArgs}) => Base64Codec.urlSafe();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,18 +26,21 @@ extension Base64CodecBinding on Base64Codec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Base64Codec');
+        return const HTType('Base64Codec');
       case 'encoder':
         return encoder;
       case 'decoder':
         return decoder;
       case 'decode':
-        return ({positionalArgs, namedArgs, typeArgs}) => decode(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decode(positionalArgs[0]);
       case 'normalize':
-        return ({positionalArgs, namedArgs, typeArgs}) => normalize(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => normalize(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,9 +54,10 @@ class Base64EncoderAutoBinding extends HTExternalClass {
       case 'Base64Encoder':
         return ({positionalArgs, namedArgs, typeArgs}) => Base64Encoder();
       case 'Base64Encoder.urlSafe':
-        return ({positionalArgs, namedArgs, typeArgs}) => Base64Encoder.urlSafe();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Base64Encoder.urlSafe();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,19 +71,23 @@ extension Base64EncoderBinding on Base64Encoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Base64Encoder');
+        return const HTType('Base64Encoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(List<int>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(List<int>.from(positionalArgs[0]));
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -93,7 +101,7 @@ class Base64DecoderAutoBinding extends HTExternalClass {
       case 'Base64Decoder':
         return ({positionalArgs, namedArgs, typeArgs}) => Base64Decoder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -107,20 +115,25 @@ extension Base64DecoderBinding on Base64Decoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Base64Decoder');
+        return const HTType('Base64Decoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => convert(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/byte_conversion.g.dart b/lib/bindings/dart/convert/byte_conversion.g.dart
index fab9892..b8c56d8 100644
--- a/lib/bindings/dart/convert/byte_conversion.g.dart
+++ b/lib/bindings/dart/convert/byte_conversion.g.dart
@@ -8,11 +8,13 @@ class ByteConversionSinkAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ByteConversionSink.withCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => ByteConversionSink.withCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ByteConversionSink.withCallback(positionalArgs[0]);
       case 'ByteConversionSink.from':
-        return ({positionalArgs, namedArgs, typeArgs}) => ByteConversionSink.from(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ByteConversionSink.from(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,16 +28,20 @@ extension ByteConversionSinkBinding on ByteConversionSink {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ByteConversionSink');
+        return const HTType('ByteConversionSink');
       case 'addSlice':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addSlice(List<int>.from(positionalArgs[0]), positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => addSlice(
+            List<int>.from(positionalArgs[0]),
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'close':
         return ({positionalArgs, namedArgs, typeArgs}) => close();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/html_escape.g.dart b/lib/bindings/dart/convert/html_escape.g.dart
index 97fc006..0c0f99f 100644
--- a/lib/bindings/dart/convert/html_escape.g.dart
+++ b/lib/bindings/dart/convert/html_escape.g.dart
@@ -10,10 +10,18 @@ class HtmlEscapeModeAutoBinding extends HTExternalClass {
       case 'HtmlEscapeMode':
         return ({positionalArgs, namedArgs, typeArgs}) => HtmlEscapeMode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : 'custom',
-            escapeLtGt: namedArgs.containsKey('escapeLtGt') ? namedArgs['escapeLtGt'] : false,
-            escapeQuot: namedArgs.containsKey('escapeQuot') ? namedArgs['escapeQuot'] : false,
-            escapeApos: namedArgs.containsKey('escapeApos') ? namedArgs['escapeApos'] : false,
-            escapeSlash: namedArgs.containsKey('escapeSlash') ? namedArgs['escapeSlash'] : false);
+            escapeLtGt: namedArgs.containsKey('escapeLtGt')
+                ? namedArgs['escapeLtGt']
+                : false,
+            escapeQuot: namedArgs.containsKey('escapeQuot')
+                ? namedArgs['escapeQuot']
+                : false,
+            escapeApos: namedArgs.containsKey('escapeApos')
+                ? namedArgs['escapeApos']
+                : false,
+            escapeSlash: namedArgs.containsKey('escapeSlash')
+                ? namedArgs['escapeSlash']
+                : false);
       case 'HtmlEscapeMode.unknown':
         return HtmlEscapeMode.unknown;
       case 'HtmlEscapeMode.attribute':
@@ -23,7 +31,7 @@ class HtmlEscapeModeAutoBinding extends HTExternalClass {
       case 'HtmlEscapeMode.element':
         return HtmlEscapeMode.element;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,7 +45,7 @@ extension HtmlEscapeModeBinding on HtmlEscapeMode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HtmlEscapeMode');
+        return const HTType('HtmlEscapeMode');
       case 'escapeLtGt':
         return escapeLtGt;
       case 'escapeQuot':
@@ -49,7 +57,7 @@ extension HtmlEscapeModeBinding on HtmlEscapeMode {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -61,10 +69,12 @@ class HtmlEscapeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'HtmlEscape':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            HtmlEscape(positionalArgs.length > 0 ? positionalArgs[0] : HtmlEscapeMode.unknown);
+        return ({positionalArgs, namedArgs, typeArgs}) => HtmlEscape(
+            positionalArgs.length > 0
+                ? positionalArgs[0]
+                : HtmlEscapeMode.unknown);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -78,21 +88,25 @@ extension HtmlEscapeBinding on HtmlEscape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HtmlEscape');
+        return const HTType('HtmlEscape');
       case 'mode':
         return mode;
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(positionalArgs[0]);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/json.g.dart b/lib/bindings/dart/convert/json.g.dart
index 77a8461..edea3d0 100644
--- a/lib/bindings/dart/convert/json.g.dart
+++ b/lib/bindings/dart/convert/json.g.dart
@@ -8,11 +8,15 @@ class JsonUnsupportedObjectErrorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'JsonUnsupportedObjectError':
-        return ({positionalArgs, namedArgs, typeArgs}) => JsonUnsupportedObjectError(positionalArgs[0],
-            cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null,
-            partialResult: namedArgs.containsKey('partialResult') ? namedArgs['partialResult'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            JsonUnsupportedObjectError(positionalArgs[0],
+                cause:
+                    namedArgs.containsKey('cause') ? namedArgs['cause'] : null,
+                partialResult: namedArgs.containsKey('partialResult')
+                    ? namedArgs['partialResult']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +30,7 @@ extension JsonUnsupportedObjectErrorBinding on JsonUnsupportedObjectError {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JsonUnsupportedObjectError');
+        return const HTType('JsonUnsupportedObjectError');
       case 'unsupportedObject':
         return unsupportedObject;
       case 'cause':
@@ -36,7 +40,7 @@ extension JsonUnsupportedObjectErrorBinding on JsonUnsupportedObjectError {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,9 +52,10 @@ class JsonCyclicErrorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'JsonCyclicError':
-        return ({positionalArgs, namedArgs, typeArgs}) => JsonCyclicError(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            JsonCyclicError(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -64,7 +69,7 @@ extension JsonCyclicErrorBinding on JsonCyclicError {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JsonCyclicError');
+        return const HTType('JsonCyclicError');
       case 'unsupportedObject':
         return unsupportedObject;
       case 'cause':
@@ -74,7 +79,7 @@ extension JsonCyclicErrorBinding on JsonCyclicError {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -87,12 +92,16 @@ class JsonCodecAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'JsonCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => JsonCodec(
-            reviver: namedArgs.containsKey('reviver') ? namedArgs['reviver'] : null,
-            toEncodable: namedArgs.containsKey('toEncodable') ? namedArgs['toEncodable'] : null);
+            reviver:
+                namedArgs.containsKey('reviver') ? namedArgs['reviver'] : null,
+            toEncodable: namedArgs.containsKey('toEncodable')
+                ? namedArgs['toEncodable']
+                : null);
       case 'JsonCodec.withReviver':
-        return ({positionalArgs, namedArgs, typeArgs}) => JsonCodec.withReviver(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            JsonCodec.withReviver(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -106,19 +115,24 @@ extension JsonCodecBinding on JsonCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JsonCodec');
+        return const HTType('JsonCodec');
       case 'encoder':
         return encoder;
       case 'decoder':
         return decoder;
       case 'decode':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            decode(positionalArgs[0], reviver: namedArgs.containsKey('reviver') ? namedArgs['reviver'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => decode(
+            positionalArgs[0],
+            reviver:
+                namedArgs.containsKey('reviver') ? namedArgs['reviver'] : null);
       case 'encode':
-        return ({positionalArgs, namedArgs, typeArgs}) => encode(positionalArgs[0],
-            toEncodable: namedArgs.containsKey('toEncodable') ? namedArgs['toEncodable'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => encode(
+            positionalArgs[0],
+            toEncodable: namedArgs.containsKey('toEncodable')
+                ? namedArgs['toEncodable']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -134,9 +148,10 @@ class JsonEncoderAutoBinding extends HTExternalClass {
             JsonEncoder(positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'JsonEncoder.withIndent':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            JsonEncoder.withIndent(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+            JsonEncoder.withIndent(positionalArgs[0],
+                positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -150,21 +165,25 @@ extension JsonEncoderBinding on JsonEncoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JsonEncoder');
+        return const HTType('JsonEncoder');
       case 'indent':
         return indent;
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(positionalArgs[0]);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -181,7 +200,7 @@ class JsonUtf8EncoderAutoBinding extends HTExternalClass {
             positionalArgs.length > 1 ? positionalArgs[1] : null,
             positionalArgs.length > 2 ? positionalArgs[2] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -195,19 +214,23 @@ extension JsonUtf8EncoderBinding on JsonUtf8Encoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JsonUtf8Encoder');
+        return const HTType('JsonUtf8Encoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(positionalArgs[0]);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -222,7 +245,7 @@ class JsonDecoderAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             JsonDecoder(positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -236,19 +259,23 @@ extension JsonDecoderBinding on JsonDecoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JsonDecoder');
+        return const HTType('JsonDecoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(positionalArgs[0]);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/latin1.g.dart b/lib/bindings/dart/convert/latin1.g.dart
index 719af00..c67fab8 100644
--- a/lib/bindings/dart/convert/latin1.g.dart
+++ b/lib/bindings/dart/convert/latin1.g.dart
@@ -8,10 +8,12 @@ class Latin1CodecAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Latin1Codec':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Latin1Codec(allowInvalid: namedArgs.containsKey('allowInvalid') ? namedArgs['allowInvalid'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Latin1Codec(
+            allowInvalid: namedArgs.containsKey('allowInvalid')
+                ? namedArgs['allowInvalid']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +27,7 @@ extension Latin1CodecBinding on Latin1Codec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Latin1Codec');
+        return const HTType('Latin1Codec');
       case 'name':
         return name;
       case 'encoder':
@@ -33,14 +35,19 @@ extension Latin1CodecBinding on Latin1Codec {
       case 'decoder':
         return decoder;
       case 'encode':
-        return ({positionalArgs, namedArgs, typeArgs}) => encode(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encode(positionalArgs[0]);
       case 'decode':
-        return ({positionalArgs, namedArgs, typeArgs}) => decode(List<int>.from(positionalArgs[0]),
-            allowInvalid: namedArgs.containsKey('allowInvalid') ? namedArgs['allowInvalid'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => decode(
+            List<int>.from(positionalArgs[0]),
+            allowInvalid: namedArgs.containsKey('allowInvalid')
+                ? namedArgs['allowInvalid']
+                : null);
       case 'decodeStream':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeStream(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeStream(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,7 +61,7 @@ class Latin1EncoderAutoBinding extends HTExternalClass {
       case 'Latin1Encoder':
         return ({positionalArgs, namedArgs, typeArgs}) => Latin1Encoder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -68,20 +75,25 @@ extension Latin1EncoderBinding on Latin1Encoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Latin1Encoder');
+        return const HTType('Latin1Encoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => convert(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -93,10 +105,12 @@ class Latin1DecoderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Latin1Decoder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Latin1Decoder(allowInvalid: namedArgs.containsKey('allowInvalid') ? namedArgs['allowInvalid'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Latin1Decoder(
+            allowInvalid: namedArgs.containsKey('allowInvalid')
+                ? namedArgs['allowInvalid']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,20 +124,25 @@ extension Latin1DecoderBinding on Latin1Decoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Latin1Decoder');
+        return const HTType('Latin1Decoder');
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(List<int>.from(positionalArgs[0]),
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => convert(
+            List<int>.from(positionalArgs[0]),
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/line_splitter.g.dart b/lib/bindings/dart/convert/line_splitter.g.dart
index 5aed734..0f81637 100644
--- a/lib/bindings/dart/convert/line_splitter.g.dart
+++ b/lib/bindings/dart/convert/line_splitter.g.dart
@@ -10,10 +10,12 @@ class LineSplitterAutoBinding extends HTExternalClass {
       case 'LineSplitter':
         return ({positionalArgs, namedArgs, typeArgs}) => LineSplitter();
       case 'LineSplitter.split':
-        return ({positionalArgs, namedArgs, typeArgs}) => LineSplitter.split(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => LineSplitter.split(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,17 +29,20 @@ extension LineSplitterBinding on LineSplitter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LineSplitter');
+        return const HTType('LineSplitter');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(positionalArgs[0]);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/string_conversion.g.dart b/lib/bindings/dart/convert/string_conversion.g.dart
index dd8c271..e0380d1 100644
--- a/lib/bindings/dart/convert/string_conversion.g.dart
+++ b/lib/bindings/dart/convert/string_conversion.g.dart
@@ -8,13 +8,16 @@ class StringConversionSinkAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StringConversionSink.withCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => StringConversionSink.withCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StringConversionSink.withCallback(positionalArgs[0]);
       case 'StringConversionSink.from':
-        return ({positionalArgs, namedArgs, typeArgs}) => StringConversionSink.from(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StringConversionSink.from(positionalArgs[0]);
       case 'StringConversionSink.fromStringSink':
-        return ({positionalArgs, namedArgs, typeArgs}) => StringConversionSink.fromStringSink(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StringConversionSink.fromStringSink(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,20 +31,25 @@ extension StringConversionSinkBinding on StringConversionSink {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StringConversionSink');
+        return const HTType('StringConversionSink');
       case 'addSlice':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addSlice(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => addSlice(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'asUtf8Sink':
-        return ({positionalArgs, namedArgs, typeArgs}) => asUtf8Sink(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            asUtf8Sink(positionalArgs[0]);
       case 'asStringSink':
         return ({positionalArgs, namedArgs, typeArgs}) => asStringSink();
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'close':
         return ({positionalArgs, namedArgs, typeArgs}) => close();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,9 +62,10 @@ class ClosableStringSinkAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ClosableStringSink.fromStringSink':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ClosableStringSink.fromStringSink(positionalArgs[0], positionalArgs[1]);
+            ClosableStringSink.fromStringSink(
+                positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -70,20 +79,24 @@ extension ClosableStringSinkBinding on ClosableStringSink {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClosableStringSink');
+        return const HTType('ClosableStringSink');
       case 'close':
         return ({positionalArgs, namedArgs, typeArgs}) => close();
       case 'write':
-        return ({positionalArgs, namedArgs, typeArgs}) => write(positionalArgs[0]);
-      case 'writeAll':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            writeAll(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : '');
+            write(positionalArgs[0]);
+      case 'writeAll':
+        return ({positionalArgs, namedArgs, typeArgs}) => writeAll(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : '');
       case 'writeln':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeln(positionalArgs.length > 0 ? positionalArgs[0] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            writeln(positionalArgs.length > 0 ? positionalArgs[0] : '');
       case 'writeCharCode':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeCharCode(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            writeCharCode(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/convert/utf.g.dart b/lib/bindings/dart/convert/utf.g.dart
index e10b361..5366ecd 100644
--- a/lib/bindings/dart/convert/utf.g.dart
+++ b/lib/bindings/dart/convert/utf.g.dart
@@ -8,10 +8,12 @@ class Utf8CodecAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Utf8Codec':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Utf8Codec(allowMalformed: namedArgs.containsKey('allowMalformed') ? namedArgs['allowMalformed'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Utf8Codec(
+            allowMalformed: namedArgs.containsKey('allowMalformed')
+                ? namedArgs['allowMalformed']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +27,7 @@ extension Utf8CodecBinding on Utf8Codec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Utf8Codec');
+        return const HTType('Utf8Codec');
       case 'name':
         return name;
       case 'encoder':
@@ -33,12 +35,16 @@ extension Utf8CodecBinding on Utf8Codec {
       case 'decoder':
         return decoder;
       case 'decode':
-        return ({positionalArgs, namedArgs, typeArgs}) => decode(List<int>.from(positionalArgs[0]),
-            allowMalformed: namedArgs.containsKey('allowMalformed') ? namedArgs['allowMalformed'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => decode(
+            List<int>.from(positionalArgs[0]),
+            allowMalformed: namedArgs.containsKey('allowMalformed')
+                ? namedArgs['allowMalformed']
+                : null);
       case 'decodeStream':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeStream(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeStream(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -52,7 +58,7 @@ class Utf8EncoderAutoBinding extends HTExternalClass {
       case 'Utf8Encoder':
         return ({positionalArgs, namedArgs, typeArgs}) => Utf8Encoder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,20 +72,25 @@ extension Utf8EncoderBinding on Utf8Encoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Utf8Encoder');
+        return const HTType('Utf8Encoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => convert(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -91,10 +102,12 @@ class Utf8DecoderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Utf8Decoder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Utf8Decoder(allowMalformed: namedArgs.containsKey('allowMalformed') ? namedArgs['allowMalformed'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Utf8Decoder(
+            allowMalformed: namedArgs.containsKey('allowMalformed')
+                ? namedArgs['allowMalformed']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -108,20 +121,25 @@ extension Utf8DecoderBinding on Utf8Decoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Utf8Decoder');
+        return const HTType('Utf8Decoder');
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(List<int>.from(positionalArgs[0]),
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => convert(
+            List<int>.from(positionalArgs[0]),
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/bigint.g.dart b/lib/bindings/dart/core/bigint.g.dart
index ad64fd8..9995ce0 100644
--- a/lib/bindings/dart/core/bigint.g.dart
+++ b/lib/bindings/dart/core/bigint.g.dart
@@ -8,13 +8,16 @@ class BigIntAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BigInt.from':
-        return ({positionalArgs, namedArgs, typeArgs}) => BigInt.from(positionalArgs[0]);
-      case 'BigInt.parse':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BigInt.parse(positionalArgs[0], radix: namedArgs.containsKey('radix') ? namedArgs['radix'] : null);
+            BigInt.from(positionalArgs[0]);
+      case 'BigInt.parse':
+        return ({positionalArgs, namedArgs, typeArgs}) => BigInt.parse(
+            positionalArgs[0],
+            radix: namedArgs.containsKey('radix') ? namedArgs['radix'] : null);
       case 'BigInt.tryParse':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BigInt.tryParse(positionalArgs[0], radix: namedArgs.containsKey('radix') ? namedArgs['radix'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => BigInt.tryParse(
+            positionalArgs[0],
+            radix: namedArgs.containsKey('radix') ? namedArgs['radix'] : null);
       case 'BigInt.zero':
         return BigInt.zero;
       case 'BigInt.one':
@@ -22,7 +25,7 @@ class BigIntAutoBinding extends HTExternalClass {
       case 'BigInt.two':
         return BigInt.two;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,7 +39,7 @@ extension BigIntBinding on BigInt {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BigInt');
+        return const HTType('BigInt');
       case 'bitLength':
         return bitLength;
       case 'sign':
@@ -52,21 +55,29 @@ extension BigIntBinding on BigInt {
       case 'abs':
         return ({positionalArgs, namedArgs, typeArgs}) => abs();
       case 'remainder':
-        return ({positionalArgs, namedArgs, typeArgs}) => remainder(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remainder(positionalArgs[0]);
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'pow':
-        return ({positionalArgs, namedArgs, typeArgs}) => pow(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            pow(positionalArgs[0]);
       case 'modPow':
-        return ({positionalArgs, namedArgs, typeArgs}) => modPow(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            modPow(positionalArgs[0], positionalArgs[1]);
       case 'modInverse':
-        return ({positionalArgs, namedArgs, typeArgs}) => modInverse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            modInverse(positionalArgs[0]);
       case 'gcd':
-        return ({positionalArgs, namedArgs, typeArgs}) => gcd(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            gcd(positionalArgs[0]);
       case 'toUnsigned':
-        return ({positionalArgs, namedArgs, typeArgs}) => toUnsigned(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toUnsigned(positionalArgs[0]);
       case 'toSigned':
-        return ({positionalArgs, namedArgs, typeArgs}) => toSigned(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toSigned(positionalArgs[0]);
       case 'toInt':
         return ({positionalArgs, namedArgs, typeArgs}) => toInt();
       case 'toDouble':
@@ -74,9 +85,10 @@ extension BigIntBinding on BigInt {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'toRadixString':
-        return ({positionalArgs, namedArgs, typeArgs}) => toRadixString(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toRadixString(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/date_time.g.dart b/lib/bindings/dart/core/date_time.g.dart
index 4cf4603..bc5205d 100644
--- a/lib/bindings/dart/core/date_time.g.dart
+++ b/lib/bindings/dart/core/date_time.g.dart
@@ -30,15 +30,23 @@ class DateTimeAutoBinding extends HTExternalClass {
       case 'DateTime.now':
         return ({positionalArgs, namedArgs, typeArgs}) => DateTime.now();
       case 'DateTime.fromMillisecondsSinceEpoch':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateTime.fromMillisecondsSinceEpoch(positionalArgs[0],
-            isUtc: namedArgs.containsKey('isUtc') ? namedArgs['isUtc'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateTime.fromMillisecondsSinceEpoch(positionalArgs[0],
+                isUtc: namedArgs.containsKey('isUtc')
+                    ? namedArgs['isUtc']
+                    : false);
       case 'DateTime.fromMicrosecondsSinceEpoch':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateTime.fromMicrosecondsSinceEpoch(positionalArgs[0],
-            isUtc: namedArgs.containsKey('isUtc') ? namedArgs['isUtc'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateTime.fromMicrosecondsSinceEpoch(positionalArgs[0],
+                isUtc: namedArgs.containsKey('isUtc')
+                    ? namedArgs['isUtc']
+                    : false);
       case 'DateTime.parse':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateTime.parse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateTime.parse(positionalArgs[0]);
       case 'DateTime.tryParse':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateTime.tryParse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateTime.tryParse(positionalArgs[0]);
       case 'DateTime.monday':
         return DateTime.monday;
       case 'DateTime.tuesday':
@@ -82,7 +90,7 @@ class DateTimeAutoBinding extends HTExternalClass {
       case 'DateTime.monthsPerYear':
         return DateTime.monthsPerYear;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -96,7 +104,7 @@ extension DateTimeBinding on DateTime {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DateTime');
+        return const HTType('DateTime');
       case 'isUtc':
         return isUtc;
       case 'hashCode':
@@ -128,13 +136,17 @@ extension DateTimeBinding on DateTime {
       case 'weekday':
         return weekday;
       case 'isBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => isBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isBefore(positionalArgs[0]);
       case 'isAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => isAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isAfter(positionalArgs[0]);
       case 'isAtSameMomentAs':
-        return ({positionalArgs, namedArgs, typeArgs}) => isAtSameMomentAs(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isAtSameMomentAs(positionalArgs[0]);
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'toLocal':
         return ({positionalArgs, namedArgs, typeArgs}) => toLocal();
       case 'toUtc':
@@ -144,13 +156,16 @@ extension DateTimeBinding on DateTime {
       case 'toIso8601String':
         return ({positionalArgs, namedArgs, typeArgs}) => toIso8601String();
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'subtract':
-        return ({positionalArgs, namedArgs, typeArgs}) => subtract(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            subtract(positionalArgs[0]);
       case 'difference':
-        return ({positionalArgs, namedArgs, typeArgs}) => difference(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            difference(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/double.g.dart b/lib/bindings/dart/core/double.g.dart
deleted file mode 100644
index 11713af..0000000
--- a/lib/bindings/dart/core/double.g.dart
+++ /dev/null
@@ -1,28 +0,0 @@
-import 'package:hetu_script/hetu_script.dart';
-import 'dart:core';
-
-class DoubleAutoBinding extends HTExternalClass {
-  DoubleAutoBinding() : super('double');
-
-  @override
-  dynamic memberGet(String varName, {String from = HTLexicon.global}) {
-    switch (varName) {
-      case 'double.parse':
-        return ({positionalArgs, namedArgs, typeArgs}) => double.parse(positionalArgs[0]);
-      case 'double.tryParse':
-        return ({positionalArgs, namedArgs, typeArgs}) => double.tryParse(positionalArgs[0]);
-      case 'double.nan':
-        return double.nan;
-      case 'double.infinity':
-        return double.infinity;
-      case 'double.negativeInfinity':
-        return double.negativeInfinity;
-      case 'double.minPositive':
-        return double.minPositive;
-      case 'double.maxFinite':
-        return double.maxFinite;
-      default:
-        throw HTErrorUndefined(varName);
-    }
-  }
-}
diff --git a/lib/bindings/dart/core/duration.g.dart b/lib/bindings/dart/core/duration.g.dart
index 703870b..1158df2 100644
--- a/lib/bindings/dart/core/duration.g.dart
+++ b/lib/bindings/dart/core/duration.g.dart
@@ -11,10 +11,16 @@ class DurationAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Duration(
             days: namedArgs.containsKey('days') ? namedArgs['days'] : 0,
             hours: namedArgs.containsKey('hours') ? namedArgs['hours'] : 0,
-            minutes: namedArgs.containsKey('minutes') ? namedArgs['minutes'] : 0,
-            seconds: namedArgs.containsKey('seconds') ? namedArgs['seconds'] : 0,
-            milliseconds: namedArgs.containsKey('milliseconds') ? namedArgs['milliseconds'] : 0,
-            microseconds: namedArgs.containsKey('microseconds') ? namedArgs['microseconds'] : 0);
+            minutes:
+                namedArgs.containsKey('minutes') ? namedArgs['minutes'] : 0,
+            seconds:
+                namedArgs.containsKey('seconds') ? namedArgs['seconds'] : 0,
+            milliseconds: namedArgs.containsKey('milliseconds')
+                ? namedArgs['milliseconds']
+                : 0,
+            microseconds: namedArgs.containsKey('microseconds')
+                ? namedArgs['microseconds']
+                : 0);
       case 'Duration.microsecondsPerMillisecond':
         return Duration.microsecondsPerMillisecond;
       case 'Duration.millisecondsPerSecond':
@@ -48,7 +54,7 @@ class DurationAutoBinding extends HTExternalClass {
       case 'Duration.zero':
         return Duration.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,7 +68,7 @@ extension DurationBinding on Duration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Duration');
+        return const HTType('Duration');
       case 'inDays':
         return inDays;
       case 'inHours':
@@ -80,13 +86,14 @@ extension DurationBinding on Duration {
       case 'isNegative':
         return isNegative;
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'abs':
         return ({positionalArgs, namedArgs, typeArgs}) => abs();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/function.g.dart b/lib/bindings/dart/core/function.g.dart
index 9059046..033b606 100644
--- a/lib/bindings/dart/core/function.g.dart
+++ b/lib/bindings/dart/core/function.g.dart
@@ -8,10 +8,12 @@ class FunctionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Function.apply':
-        return ({positionalArgs, namedArgs, typeArgs}) => Function.apply(positionalArgs[0],
-            List<dynamic>.from(positionalArgs[1]), positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Function.apply(
+            positionalArgs[0],
+            List<dynamic>.from(positionalArgs[1]),
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/int.g.dart b/lib/bindings/dart/core/int.g.dart
deleted file mode 100644
index 93d0f6c..0000000
--- a/lib/bindings/dart/core/int.g.dart
+++ /dev/null
@@ -1,79 +0,0 @@
-import 'package:hetu_script/hetu_script.dart';
-import 'dart:core';
-
-class IntAutoBinding extends HTExternalClass {
-  IntAutoBinding() : super('int');
-
-  @override
-  dynamic memberGet(String varName, {String from = HTLexicon.global}) {
-    switch (varName) {
-      case 'int.fromEnvironment':
-        return ({positionalArgs, namedArgs, typeArgs}) => int.fromEnvironment(positionalArgs[0],
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : 0);
-      case 'int.parse':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            int.parse(positionalArgs[0], radix: namedArgs.containsKey('radix') ? namedArgs['radix'] : null);
-      case 'int.tryParse':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            int.tryParse(positionalArgs[0], radix: namedArgs.containsKey('radix') ? namedArgs['radix'] : null);
-      default:
-        throw HTErrorUndefined(varName);
-    }
-  }
-
-  @override
-  dynamic instanceMemberGet(dynamic instance, String id) {
-    return (instance as int).htFetch(id);
-  }
-}
-
-extension IntBinding on int {
-  dynamic htFetch(String varName) {
-    switch (varName) {
-      case 'typeid':
-        return const HTTypeId('int');
-      case 'isEven':
-        return isEven;
-      case 'isOdd':
-        return isOdd;
-      case 'bitLength':
-        return bitLength;
-      case 'sign':
-        return sign;
-      case 'modPow':
-        return ({positionalArgs, namedArgs, typeArgs}) => modPow(positionalArgs[0], positionalArgs[1]);
-      case 'modInverse':
-        return ({positionalArgs, namedArgs, typeArgs}) => modInverse(positionalArgs[0]);
-      case 'gcd':
-        return ({positionalArgs, namedArgs, typeArgs}) => gcd(positionalArgs[0]);
-      case 'toUnsigned':
-        return ({positionalArgs, namedArgs, typeArgs}) => toUnsigned(positionalArgs[0]);
-      case 'toSigned':
-        return ({positionalArgs, namedArgs, typeArgs}) => toSigned(positionalArgs[0]);
-      case 'abs':
-        return ({positionalArgs, namedArgs, typeArgs}) => abs();
-      case 'round':
-        return ({positionalArgs, namedArgs, typeArgs}) => round();
-      case 'floor':
-        return ({positionalArgs, namedArgs, typeArgs}) => floor();
-      case 'ceil':
-        return ({positionalArgs, namedArgs, typeArgs}) => ceil();
-      case 'truncate':
-        return ({positionalArgs, namedArgs, typeArgs}) => truncate();
-      case 'roundToDouble':
-        return ({positionalArgs, namedArgs, typeArgs}) => roundToDouble();
-      case 'floorToDouble':
-        return ({positionalArgs, namedArgs, typeArgs}) => floorToDouble();
-      case 'ceilToDouble':
-        return ({positionalArgs, namedArgs, typeArgs}) => ceilToDouble();
-      case 'truncateToDouble':
-        return ({positionalArgs, namedArgs, typeArgs}) => truncateToDouble();
-      case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => toString();
-      case 'toRadixString':
-        return ({positionalArgs, namedArgs, typeArgs}) => toRadixString(positionalArgs[0]);
-      default:
-        throw HTErrorUndefined(varName);
-    }
-  }
-}
diff --git a/lib/bindings/dart/core/invocation.g.dart b/lib/bindings/dart/core/invocation.g.dart
index ff5b473..03adf70 100644
--- a/lib/bindings/dart/core/invocation.g.dart
+++ b/lib/bindings/dart/core/invocation.g.dart
@@ -9,16 +9,24 @@ class InvocationAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'Invocation.method':
         return ({positionalArgs, namedArgs, typeArgs}) => Invocation.method(
-            positionalArgs[0], positionalArgs[1], positionalArgs.length > 2 ? positionalArgs[2] : null);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'Invocation.genericMethod':
-        return ({positionalArgs, namedArgs, typeArgs}) => Invocation.genericMethod(positionalArgs[0], positionalArgs[1],
-            positionalArgs[2], positionalArgs.length > 3 ? positionalArgs[3] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Invocation.genericMethod(
+                positionalArgs[0],
+                positionalArgs[1],
+                positionalArgs[2],
+                positionalArgs.length > 3 ? positionalArgs[3] : null);
       case 'Invocation.getter':
-        return ({positionalArgs, namedArgs, typeArgs}) => Invocation.getter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Invocation.getter(positionalArgs[0]);
       case 'Invocation.setter':
-        return ({positionalArgs, namedArgs, typeArgs}) => Invocation.setter(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Invocation.setter(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +40,7 @@ extension InvocationBinding on Invocation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Invocation');
+        return const HTType('Invocation');
       case 'memberName':
         return memberName;
       case 'typeArguments':
@@ -50,7 +58,7 @@ extension InvocationBinding on Invocation {
       case 'isAccessor':
         return isAccessor;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/regexp.g.dart b/lib/bindings/dart/core/regexp.g.dart
index c856000..ec8912e 100644
--- a/lib/bindings/dart/core/regexp.g.dart
+++ b/lib/bindings/dart/core/regexp.g.dart
@@ -8,15 +8,23 @@ class RegExpAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RegExp':
-        return ({positionalArgs, namedArgs, typeArgs}) => RegExp(positionalArgs[0],
-            multiLine: namedArgs.containsKey('multiLine') ? namedArgs['multiLine'] : false,
-            caseSensitive: namedArgs.containsKey('caseSensitive') ? namedArgs['caseSensitive'] : true,
-            unicode: namedArgs.containsKey('unicode') ? namedArgs['unicode'] : false,
-            dotAll: namedArgs.containsKey('dotAll') ? namedArgs['dotAll'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => RegExp(
+            positionalArgs[0],
+            multiLine: namedArgs.containsKey('multiLine')
+                ? namedArgs['multiLine']
+                : false,
+            caseSensitive: namedArgs.containsKey('caseSensitive')
+                ? namedArgs['caseSensitive']
+                : true,
+            unicode:
+                namedArgs.containsKey('unicode') ? namedArgs['unicode'] : false,
+            dotAll:
+                namedArgs.containsKey('dotAll') ? namedArgs['dotAll'] : false);
       case 'RegExp.escape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RegExp.escape(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RegExp.escape(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +38,7 @@ extension RegExpBinding on RegExp {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RegExp');
+        return const HTType('RegExp');
       case 'pattern':
         return pattern;
       case 'isMultiLine':
@@ -42,16 +50,20 @@ extension RegExpBinding on RegExp {
       case 'isDotAll':
         return isDotAll;
       case 'firstMatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => firstMatch(positionalArgs[0]);
-      case 'allMatches':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            allMatches(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : 0);
+            firstMatch(positionalArgs[0]);
+      case 'allMatches':
+        return ({positionalArgs, namedArgs, typeArgs}) => allMatches(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0);
       case 'hasMatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => hasMatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hasMatch(positionalArgs[0]);
       case 'stringMatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => stringMatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            stringMatch(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/stacktrace.g.dart b/lib/bindings/dart/core/stacktrace.g.dart
index 5c0c971..7a79289 100644
--- a/lib/bindings/dart/core/stacktrace.g.dart
+++ b/lib/bindings/dart/core/stacktrace.g.dart
@@ -8,13 +8,14 @@ class StackTraceAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StackTrace.fromString':
-        return ({positionalArgs, namedArgs, typeArgs}) => StackTrace.fromString(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StackTrace.fromString(positionalArgs[0]);
       case 'StackTrace.current':
         return StackTrace.current;
       case 'StackTrace.empty':
         return StackTrace.empty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,11 +29,11 @@ extension StackTraceBinding on StackTrace {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StackTrace');
+        return const HTType('StackTrace');
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/stopwatch.g.dart b/lib/bindings/dart/core/stopwatch.g.dart
index d12a66d..a69caf0 100644
--- a/lib/bindings/dart/core/stopwatch.g.dart
+++ b/lib/bindings/dart/core/stopwatch.g.dart
@@ -10,7 +10,7 @@ class StopwatchAutoBinding extends HTExternalClass {
       case 'Stopwatch':
         return ({positionalArgs, namedArgs, typeArgs}) => Stopwatch();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +24,7 @@ extension StopwatchBinding on Stopwatch {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Stopwatch');
+        return const HTType('Stopwatch');
       case 'frequency':
         return frequency;
       case 'elapsedTicks':
@@ -44,7 +44,7 @@ extension StopwatchBinding on Stopwatch {
       case 'reset':
         return ({positionalArgs, namedArgs, typeArgs}) => reset();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/string_buffer.g.dart b/lib/bindings/dart/core/string_buffer.g.dart
index bd819c5..e5e43ff 100644
--- a/lib/bindings/dart/core/string_buffer.g.dart
+++ b/lib/bindings/dart/core/string_buffer.g.dart
@@ -11,7 +11,7 @@ class StringBufferAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             StringBuffer(positionalArgs.length > 0 ? positionalArgs[0] : '');
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +25,7 @@ extension StringBufferBinding on StringBuffer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StringBuffer');
+        return const HTType('StringBuffer');
       case 'length':
         return length;
       case 'isEmpty':
@@ -33,20 +33,24 @@ extension StringBufferBinding on StringBuffer {
       case 'isNotEmpty':
         return isNotEmpty;
       case 'write':
-        return ({positionalArgs, namedArgs, typeArgs}) => write(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            write(positionalArgs[0]);
       case 'writeCharCode':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeCharCode(positionalArgs[0]);
-      case 'writeAll':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            writeAll(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : '');
+            writeCharCode(positionalArgs[0]);
+      case 'writeAll':
+        return ({positionalArgs, namedArgs, typeArgs}) => writeAll(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : '');
       case 'writeln':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeln(positionalArgs.length > 0 ? positionalArgs[0] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            writeln(positionalArgs.length > 0 ? positionalArgs[0] : '');
       case 'clear':
         return ({positionalArgs, namedArgs, typeArgs}) => clear();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/symbol.g.dart b/lib/bindings/dart/core/symbol.g.dart
index 7370d87..c66b1d6 100644
--- a/lib/bindings/dart/core/symbol.g.dart
+++ b/lib/bindings/dart/core/symbol.g.dart
@@ -8,13 +8,14 @@ class SymbolAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Symbol':
-        return ({positionalArgs, namedArgs, typeArgs}) => Symbol(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Symbol(positionalArgs[0]);
       case 'Symbol.unaryMinus':
         return Symbol.unaryMinus;
       case 'Symbol.empty':
         return Symbol.empty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,11 +29,11 @@ extension SymbolBinding on Symbol {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Symbol');
+        return const HTType('Symbol');
       case 'hashCode':
         return hashCode;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/core/uri.g.dart b/lib/bindings/dart/core/uri.g.dart
index f64b287..eb8ba5c 100644
--- a/lib/bindings/dart/core/uri.g.dart
+++ b/lib/bindings/dart/core/uri.g.dart
@@ -10,70 +10,122 @@ class UriAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'Uri':
         return ({positionalArgs, namedArgs, typeArgs}) => Uri(
-            scheme: namedArgs.containsKey('scheme') ? namedArgs['scheme'] : null,
-            userInfo: namedArgs.containsKey('userInfo') ? namedArgs['userInfo'] : null,
+            scheme:
+                namedArgs.containsKey('scheme') ? namedArgs['scheme'] : null,
+            userInfo: namedArgs.containsKey('userInfo')
+                ? namedArgs['userInfo']
+                : null,
             host: namedArgs.containsKey('host') ? namedArgs['host'] : null,
             port: namedArgs.containsKey('port') ? namedArgs['port'] : null,
             path: namedArgs.containsKey('path') ? namedArgs['path'] : null,
-            pathSegments: namedArgs.containsKey('pathSegments') ? namedArgs['pathSegments'] : null,
+            pathSegments: namedArgs.containsKey('pathSegments')
+                ? namedArgs['pathSegments']
+                : null,
             query: namedArgs.containsKey('query') ? namedArgs['query'] : null,
-            queryParameters: namedArgs.containsKey('queryParameters') ? namedArgs['queryParameters'] : null,
-            fragment: namedArgs.containsKey('fragment') ? namedArgs['fragment'] : null);
+            queryParameters: namedArgs.containsKey('queryParameters')
+                ? namedArgs['queryParameters']
+                : null,
+            fragment: namedArgs.containsKey('fragment')
+                ? namedArgs['fragment']
+                : null);
       case 'Uri.http':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Uri.http(positionalArgs[0], positionalArgs[1], positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.http(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'Uri.https':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Uri.https(positionalArgs[0], positionalArgs[1], positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.https(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'Uri.file':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Uri.file(positionalArgs[0], windows: namedArgs.containsKey('windows') ? namedArgs['windows'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.file(
+            positionalArgs[0],
+            windows:
+                namedArgs.containsKey('windows') ? namedArgs['windows'] : null);
       case 'Uri.directory':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Uri.directory(positionalArgs[0], windows: namedArgs.containsKey('windows') ? namedArgs['windows'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.directory(
+            positionalArgs[0],
+            windows:
+                namedArgs.containsKey('windows') ? namedArgs['windows'] : null);
       case 'Uri.dataFromString':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.dataFromString(positionalArgs[0],
-            mimeType: namedArgs.containsKey('mimeType') ? namedArgs['mimeType'] : null,
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : null,
-            parameters: namedArgs.containsKey('parameters') ? namedArgs['parameters'] : null,
-            base64: namedArgs.containsKey('base64') ? namedArgs['base64'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.dataFromString(
+            positionalArgs[0],
+            mimeType: namedArgs.containsKey('mimeType')
+                ? namedArgs['mimeType']
+                : null,
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : null,
+            parameters: namedArgs.containsKey('parameters')
+                ? namedArgs['parameters']
+                : null,
+            base64:
+                namedArgs.containsKey('base64') ? namedArgs['base64'] : false);
       case 'Uri.dataFromBytes':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.dataFromBytes(List<int>.from(positionalArgs[0]),
-            mimeType: namedArgs.containsKey('mimeType') ? namedArgs['mimeType'] : 'application/octet-stream',
-            parameters: namedArgs.containsKey('parameters') ? namedArgs['parameters'] : null,
-            percentEncoded: namedArgs.containsKey('percentEncoded') ? namedArgs['percentEncoded'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.dataFromBytes(
+            List<int>.from(positionalArgs[0]),
+            mimeType: namedArgs.containsKey('mimeType')
+                ? namedArgs['mimeType']
+                : 'application/octet-stream',
+            parameters: namedArgs.containsKey('parameters')
+                ? namedArgs['parameters']
+                : null,
+            percentEncoded: namedArgs.containsKey('percentEncoded')
+                ? namedArgs['percentEncoded']
+                : false);
       case 'Uri.parse':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.parse(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.parse(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'Uri.tryParse':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.tryParse(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.tryParse(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'Uri.encodeComponent':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.encodeComponent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Uri.encodeComponent(positionalArgs[0]);
       case 'Uri.encodeQueryComponent':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.encodeQueryComponent(positionalArgs[0],
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Uri.encodeQueryComponent(positionalArgs[0],
+                encoding: namedArgs.containsKey('encoding')
+                    ? namedArgs['encoding']
+                    : utf8);
       case 'Uri.decodeComponent':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.decodeComponent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Uri.decodeComponent(positionalArgs[0]);
       case 'Uri.decodeQueryComponent':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.decodeQueryComponent(positionalArgs[0],
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Uri.decodeQueryComponent(positionalArgs[0],
+                encoding: namedArgs.containsKey('encoding')
+                    ? namedArgs['encoding']
+                    : utf8);
       case 'Uri.encodeFull':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.encodeFull(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Uri.encodeFull(positionalArgs[0]);
       case 'Uri.decodeFull':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.decodeFull(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Uri.decodeFull(positionalArgs[0]);
       case 'Uri.splitQueryString':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.splitQueryString(positionalArgs[0],
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.splitQueryString(
+            positionalArgs[0],
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8);
       case 'Uri.parseIPv4Address':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.parseIPv4Address(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Uri.parseIPv4Address(positionalArgs[0]);
       case 'Uri.parseIPv6Address':
-        return ({positionalArgs, namedArgs, typeArgs}) => Uri.parseIPv6Address(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Uri.parseIPv6Address(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'Uri.base':
         return Uri.base;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -87,7 +139,7 @@ extension UriBinding on Uri {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Uri');
+        return const HTType('Uri');
       case 'scheme':
         return scheme;
       case 'authority':
@@ -133,33 +185,46 @@ extension UriBinding on Uri {
       case 'hashCode':
         return hashCode;
       case 'isScheme':
-        return ({positionalArgs, namedArgs, typeArgs}) => isScheme(positionalArgs[0]);
-      case 'toFilePath':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toFilePath(windows: namedArgs.containsKey('windows') ? namedArgs['windows'] : null);
+            isScheme(positionalArgs[0]);
+      case 'toFilePath':
+        return ({positionalArgs, namedArgs, typeArgs}) => toFilePath(
+            windows:
+                namedArgs.containsKey('windows') ? namedArgs['windows'] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'replace':
         return ({positionalArgs, namedArgs, typeArgs}) => replace(
-            scheme: namedArgs.containsKey('scheme') ? namedArgs['scheme'] : null,
-            userInfo: namedArgs.containsKey('userInfo') ? namedArgs['userInfo'] : null,
+            scheme:
+                namedArgs.containsKey('scheme') ? namedArgs['scheme'] : null,
+            userInfo: namedArgs.containsKey('userInfo')
+                ? namedArgs['userInfo']
+                : null,
             host: namedArgs.containsKey('host') ? namedArgs['host'] : null,
             port: namedArgs.containsKey('port') ? namedArgs['port'] : null,
             path: namedArgs.containsKey('path') ? namedArgs['path'] : null,
-            pathSegments: namedArgs.containsKey('pathSegments') ? namedArgs['pathSegments'] : null,
+            pathSegments: namedArgs.containsKey('pathSegments')
+                ? namedArgs['pathSegments']
+                : null,
             query: namedArgs.containsKey('query') ? namedArgs['query'] : null,
-            queryParameters: namedArgs.containsKey('queryParameters') ? namedArgs['queryParameters'] : null,
-            fragment: namedArgs.containsKey('fragment') ? namedArgs['fragment'] : null);
+            queryParameters: namedArgs.containsKey('queryParameters')
+                ? namedArgs['queryParameters']
+                : null,
+            fragment: namedArgs.containsKey('fragment')
+                ? namedArgs['fragment']
+                : null);
       case 'removeFragment':
         return ({positionalArgs, namedArgs, typeArgs}) => removeFragment();
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'resolveUri':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveUri(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveUri(positionalArgs[0]);
       case 'normalizePath':
         return ({positionalArgs, namedArgs, typeArgs}) => normalizePath();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -171,22 +236,39 @@ class UriDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'UriData.fromString':
-        return ({positionalArgs, namedArgs, typeArgs}) => UriData.fromString(positionalArgs[0],
-            mimeType: namedArgs.containsKey('mimeType') ? namedArgs['mimeType'] : null,
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : null,
-            parameters: namedArgs.containsKey('parameters') ? namedArgs['parameters'] : null,
-            base64: namedArgs.containsKey('base64') ? namedArgs['base64'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => UriData.fromString(
+            positionalArgs[0],
+            mimeType: namedArgs.containsKey('mimeType')
+                ? namedArgs['mimeType']
+                : null,
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : null,
+            parameters: namedArgs.containsKey('parameters')
+                ? namedArgs['parameters']
+                : null,
+            base64:
+                namedArgs.containsKey('base64') ? namedArgs['base64'] : false);
       case 'UriData.fromBytes':
-        return ({positionalArgs, namedArgs, typeArgs}) => UriData.fromBytes(List<int>.from(positionalArgs[0]),
-            mimeType: namedArgs.containsKey('mimeType') ? namedArgs['mimeType'] : 'application/octet-stream',
-            parameters: namedArgs.containsKey('parameters') ? namedArgs['parameters'] : null,
-            percentEncoded: namedArgs.containsKey('percentEncoded') ? namedArgs['percentEncoded'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => UriData.fromBytes(
+            List<int>.from(positionalArgs[0]),
+            mimeType: namedArgs.containsKey('mimeType')
+                ? namedArgs['mimeType']
+                : 'application/octet-stream',
+            parameters: namedArgs.containsKey('parameters')
+                ? namedArgs['parameters']
+                : null,
+            percentEncoded: namedArgs.containsKey('percentEncoded')
+                ? namedArgs['percentEncoded']
+                : false);
       case 'UriData.fromUri':
-        return ({positionalArgs, namedArgs, typeArgs}) => UriData.fromUri(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            UriData.fromUri(positionalArgs[0]);
       case 'UriData.parse':
-        return ({positionalArgs, namedArgs, typeArgs}) => UriData.parse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            UriData.parse(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -200,7 +282,7 @@ extension UriDataBinding on UriData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UriData');
+        return const HTType('UriData');
       case 'uri':
         return uri;
       case 'mimeType':
@@ -216,12 +298,14 @@ extension UriDataBinding on UriData {
       case 'contentAsBytes':
         return ({positionalArgs, namedArgs, typeArgs}) => contentAsBytes();
       case 'contentAsString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            contentAsString(encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => contentAsString(
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/common.g.dart b/lib/bindings/dart/io/common.g.dart
index 7043186..79d66ea 100644
--- a/lib/bindings/dart/io/common.g.dart
+++ b/lib/bindings/dart/io/common.g.dart
@@ -8,12 +8,13 @@ class OSErrorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'OSError':
-        return ({positionalArgs, namedArgs, typeArgs}) => OSError(positionalArgs.length > 0 ? positionalArgs[0] : '',
+        return ({positionalArgs, namedArgs, typeArgs}) => OSError(
+            positionalArgs.length > 0 ? positionalArgs[0] : '',
             positionalArgs.length > 1 ? positionalArgs[1] : noErrorCode);
       case 'OSError.noErrorCode':
         return OSError.noErrorCode;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +30,7 @@ extension OSErrorBinding on OSError {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OSError');
+        return const HTType('OSError');
       case 'message':
         return message;
       case 'errorCode':
@@ -37,7 +38,7 @@ extension OSErrorBinding on OSError {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/data_transformer.g.dart b/lib/bindings/dart/io/data_transformer.g.dart
index 9187102..c6c169e 100644
--- a/lib/bindings/dart/io/data_transformer.g.dart
+++ b/lib/bindings/dart/io/data_transformer.g.dart
@@ -36,7 +36,7 @@ class ZLibOptionAutoBinding extends HTExternalClass {
       case 'ZLibOption.strategyDefault':
         return ZLibOption.strategyDefault;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -49,15 +49,25 @@ class ZLibCodecAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ZLibCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => ZLibCodec(
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : ZLibOption.defaultLevel,
-            windowBits: namedArgs.containsKey('windowBits') ? namedArgs['windowBits'] : ZLibOption.defaultWindowBits,
-            memLevel: namedArgs.containsKey('memLevel') ? namedArgs['memLevel'] : ZLibOption.defaultMemLevel,
-            strategy: namedArgs.containsKey('strategy') ? namedArgs['strategy'] : ZLibOption.strategyDefault,
-            dictionary: namedArgs.containsKey('dictionary') ? List<int>.from(namedArgs['dictionary']) : null,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : ZLibOption.defaultLevel,
+            windowBits: namedArgs.containsKey('windowBits')
+                ? namedArgs['windowBits']
+                : ZLibOption.defaultWindowBits,
+            memLevel: namedArgs.containsKey('memLevel')
+                ? namedArgs['memLevel']
+                : ZLibOption.defaultMemLevel,
+            strategy: namedArgs.containsKey('strategy')
+                ? namedArgs['strategy']
+                : ZLibOption.strategyDefault,
+            dictionary: namedArgs.containsKey('dictionary')
+                ? List<int>.from(namedArgs['dictionary'])
+                : null,
             raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false,
             gzip: namedArgs.containsKey('gzip') ? namedArgs['gzip'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,7 +81,7 @@ extension ZLibCodecBinding on ZLibCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ZLibCodec');
+        return const HTType('ZLibCodec');
       case 'gzip':
         return gzip;
       case 'level':
@@ -91,7 +101,7 @@ extension ZLibCodecBinding on ZLibCodec {
       case 'decoder':
         return decoder;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -104,15 +114,25 @@ class GZipCodecAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'GZipCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => GZipCodec(
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : ZLibOption.defaultLevel,
-            windowBits: namedArgs.containsKey('windowBits') ? namedArgs['windowBits'] : ZLibOption.defaultWindowBits,
-            memLevel: namedArgs.containsKey('memLevel') ? namedArgs['memLevel'] : ZLibOption.defaultMemLevel,
-            strategy: namedArgs.containsKey('strategy') ? namedArgs['strategy'] : ZLibOption.strategyDefault,
-            dictionary: namedArgs.containsKey('dictionary') ? List<int>.from(namedArgs['dictionary']) : null,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : ZLibOption.defaultLevel,
+            windowBits: namedArgs.containsKey('windowBits')
+                ? namedArgs['windowBits']
+                : ZLibOption.defaultWindowBits,
+            memLevel: namedArgs.containsKey('memLevel')
+                ? namedArgs['memLevel']
+                : ZLibOption.defaultMemLevel,
+            strategy: namedArgs.containsKey('strategy')
+                ? namedArgs['strategy']
+                : ZLibOption.strategyDefault,
+            dictionary: namedArgs.containsKey('dictionary')
+                ? List<int>.from(namedArgs['dictionary'])
+                : null,
             raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false,
             gzip: namedArgs.containsKey('gzip') ? namedArgs['gzip'] : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -126,7 +146,7 @@ extension GZipCodecBinding on GZipCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GZipCodec');
+        return const HTType('GZipCodec');
       case 'gzip':
         return gzip;
       case 'level':
@@ -146,7 +166,7 @@ extension GZipCodecBinding on GZipCodec {
       case 'decoder':
         return decoder;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -160,14 +180,24 @@ class ZLibEncoderAutoBinding extends HTExternalClass {
       case 'ZLibEncoder':
         return ({positionalArgs, namedArgs, typeArgs}) => ZLibEncoder(
             gzip: namedArgs.containsKey('gzip') ? namedArgs['gzip'] : false,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : ZLibOption.defaultLevel,
-            windowBits: namedArgs.containsKey('windowBits') ? namedArgs['windowBits'] : ZLibOption.defaultWindowBits,
-            memLevel: namedArgs.containsKey('memLevel') ? namedArgs['memLevel'] : ZLibOption.defaultMemLevel,
-            strategy: namedArgs.containsKey('strategy') ? namedArgs['strategy'] : ZLibOption.strategyDefault,
-            dictionary: namedArgs.containsKey('dictionary') ? List<int>.from(namedArgs['dictionary']) : null,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : ZLibOption.defaultLevel,
+            windowBits: namedArgs.containsKey('windowBits')
+                ? namedArgs['windowBits']
+                : ZLibOption.defaultWindowBits,
+            memLevel: namedArgs.containsKey('memLevel')
+                ? namedArgs['memLevel']
+                : ZLibOption.defaultMemLevel,
+            strategy: namedArgs.containsKey('strategy')
+                ? namedArgs['strategy']
+                : ZLibOption.strategyDefault,
+            dictionary: namedArgs.containsKey('dictionary')
+                ? List<int>.from(namedArgs['dictionary'])
+                : null,
             raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -181,7 +211,7 @@ extension ZLibEncoderBinding on ZLibEncoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ZLibEncoder');
+        return const HTType('ZLibEncoder');
       case 'gzip':
         return gzip;
       case 'level':
@@ -197,17 +227,21 @@ extension ZLibEncoderBinding on ZLibEncoder {
       case 'raw':
         return raw;
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(List<int>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(List<int>.from(positionalArgs[0]));
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -220,11 +254,15 @@ class ZLibDecoderAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ZLibDecoder':
         return ({positionalArgs, namedArgs, typeArgs}) => ZLibDecoder(
-            windowBits: namedArgs.containsKey('windowBits') ? namedArgs['windowBits'] : ZLibOption.defaultWindowBits,
-            dictionary: namedArgs.containsKey('dictionary') ? List<int>.from(namedArgs['dictionary']) : null,
+            windowBits: namedArgs.containsKey('windowBits')
+                ? namedArgs['windowBits']
+                : ZLibOption.defaultWindowBits,
+            dictionary: namedArgs.containsKey('dictionary')
+                ? List<int>.from(namedArgs['dictionary'])
+                : null,
             raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -238,7 +276,7 @@ extension ZLibDecoderBinding on ZLibDecoder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ZLibDecoder');
+        return const HTType('ZLibDecoder');
       case 'windowBits':
         return windowBits;
       case 'dictionary':
@@ -246,17 +284,21 @@ extension ZLibDecoderBinding on ZLibDecoder {
       case 'raw':
         return raw;
       case 'convert':
-        return ({positionalArgs, namedArgs, typeArgs}) => convert(List<int>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            convert(List<int>.from(positionalArgs[0]));
       case 'startChunkedConversion':
-        return ({positionalArgs, namedArgs, typeArgs}) => startChunkedConversion(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            startChunkedConversion(positionalArgs[0]);
       case 'fuse':
-        return ({positionalArgs, namedArgs, typeArgs}) => fuse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fuse(positionalArgs[0]);
       case 'bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => bind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bind(positionalArgs[0]);
       case 'cast':
         return ({positionalArgs, namedArgs, typeArgs}) => cast();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -268,21 +310,37 @@ class RawZLibFilterAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawZLibFilter.deflateFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawZLibFilter.deflateFilter(
-            gzip: namedArgs.containsKey('gzip') ? namedArgs['gzip'] : false,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : ZLibOption.defaultLevel,
-            windowBits: namedArgs.containsKey('windowBits') ? namedArgs['windowBits'] : ZLibOption.defaultWindowBits,
-            memLevel: namedArgs.containsKey('memLevel') ? namedArgs['memLevel'] : ZLibOption.defaultMemLevel,
-            strategy: namedArgs.containsKey('strategy') ? namedArgs['strategy'] : ZLibOption.strategyDefault,
-            dictionary: namedArgs.containsKey('dictionary') ? List<int>.from(namedArgs['dictionary']) : null,
-            raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawZLibFilter.deflateFilter(
+                gzip: namedArgs.containsKey('gzip') ? namedArgs['gzip'] : false,
+                level: namedArgs.containsKey('level')
+                    ? namedArgs['level']
+                    : ZLibOption.defaultLevel,
+                windowBits: namedArgs.containsKey('windowBits')
+                    ? namedArgs['windowBits']
+                    : ZLibOption.defaultWindowBits,
+                memLevel: namedArgs.containsKey('memLevel')
+                    ? namedArgs['memLevel']
+                    : ZLibOption.defaultMemLevel,
+                strategy: namedArgs.containsKey('strategy')
+                    ? namedArgs['strategy']
+                    : ZLibOption.strategyDefault,
+                dictionary: namedArgs.containsKey('dictionary')
+                    ? List<int>.from(namedArgs['dictionary'])
+                    : null,
+                raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false);
       case 'RawZLibFilter.inflateFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawZLibFilter.inflateFilter(
-            windowBits: namedArgs.containsKey('windowBits') ? namedArgs['windowBits'] : ZLibOption.defaultWindowBits,
-            dictionary: namedArgs.containsKey('dictionary') ? List<int>.from(namedArgs['dictionary']) : null,
-            raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawZLibFilter.inflateFilter(
+                windowBits: namedArgs.containsKey('windowBits')
+                    ? namedArgs['windowBits']
+                    : ZLibOption.defaultWindowBits,
+                dictionary: namedArgs.containsKey('dictionary')
+                    ? List<int>.from(namedArgs['dictionary'])
+                    : null,
+                raw: namedArgs.containsKey('raw') ? namedArgs['raw'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -296,16 +354,18 @@ extension RawZLibFilterBinding on RawZLibFilter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawZLibFilter');
+        return const HTType('RawZLibFilter');
       case 'process':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            process(List<int>.from(positionalArgs[0]), positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => process(
+            List<int>.from(positionalArgs[0]),
+            positionalArgs[1],
+            positionalArgs[2]);
       case 'processed':
         return ({positionalArgs, namedArgs, typeArgs}) => processed(
             flush: namedArgs.containsKey('flush') ? namedArgs['flush'] : true,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/directory.g.dart b/lib/bindings/dart/io/directory.g.dart
index ffa7d5a..27ed80d 100644
--- a/lib/bindings/dart/io/directory.g.dart
+++ b/lib/bindings/dart/io/directory.g.dart
@@ -8,27 +8,31 @@ class DirectoryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Directory':
-        return ({positionalArgs, namedArgs, typeArgs}) => Directory(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Directory(positionalArgs[0]);
       case 'Directory.fromRawPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => Directory.fromRawPath(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Directory.fromRawPath(positionalArgs[0]);
       case 'Directory.fromUri':
-        return ({positionalArgs, namedArgs, typeArgs}) => Directory.fromUri(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Directory.fromUri(positionalArgs[0]);
       case 'Directory.current':
         return Directory.current;
       case 'Directory.systemTemp':
         return Directory.systemTemp;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Directory.current':
         return Directory.current = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -42,7 +46,7 @@ extension DirectoryBinding on Directory {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Directory');
+        return const HTType('Directory');
       case 'path':
         return path;
       case 'uri':
@@ -50,37 +54,53 @@ extension DirectoryBinding on Directory {
       case 'absolute':
         return absolute;
       case 'create':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            create(recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => create(
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false);
       case 'createSync':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createSync(recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => createSync(
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false);
       case 'createTemp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createTemp(positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'createTempSync':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createTempSync(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createTempSync(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'resolveSymbolicLinks':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveSymbolicLinks();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveSymbolicLinks();
       case 'resolveSymbolicLinksSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveSymbolicLinksSync();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveSymbolicLinksSync();
       case 'rename':
-        return ({positionalArgs, namedArgs, typeArgs}) => rename(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rename(positionalArgs[0]);
       case 'renameSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => renameSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            renameSync(positionalArgs[0]);
       case 'list':
         return ({positionalArgs, namedArgs, typeArgs}) => list(
-            recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false,
-            followLinks: namedArgs.containsKey('followLinks') ? namedArgs['followLinks'] : true);
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false,
+            followLinks: namedArgs.containsKey('followLinks')
+                ? namedArgs['followLinks']
+                : true);
       case 'listSync':
         return ({positionalArgs, namedArgs, typeArgs}) => listSync(
-            recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false,
-            followLinks: namedArgs.containsKey('followLinks') ? namedArgs['followLinks'] : true);
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false,
+            followLinks: namedArgs.containsKey('followLinks')
+                ? namedArgs['followLinks']
+                : true);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/file.g.dart b/lib/bindings/dart/io/file.g.dart
index 8bd9f7f..59dca1a 100644
--- a/lib/bindings/dart/io/file.g.dart
+++ b/lib/bindings/dart/io/file.g.dart
@@ -19,7 +19,7 @@ class FileModeAutoBinding extends HTExternalClass {
       case 'FileMode.writeOnlyAppend':
         return FileMode.writeOnlyAppend;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -39,7 +39,7 @@ class FileLockAutoBinding extends HTExternalClass {
       case 'FileLock.blockingExclusive':
         return FileLock.blockingExclusive;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,13 +51,16 @@ class FileAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'File':
-        return ({positionalArgs, namedArgs, typeArgs}) => File(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            File(positionalArgs[0]);
       case 'File.fromUri':
-        return ({positionalArgs, namedArgs, typeArgs}) => File.fromUri(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            File.fromUri(positionalArgs[0]);
       case 'File.fromRawPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => File.fromRawPath(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            File.fromRawPath(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,25 +74,33 @@ extension FileBinding on File {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('File');
+        return const HTType('File');
       case 'absolute':
         return absolute;
       case 'path':
         return path;
       case 'create':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            create(recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => create(
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false);
       case 'createSync':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createSync(recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => createSync(
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false);
       case 'rename':
-        return ({positionalArgs, namedArgs, typeArgs}) => rename(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rename(positionalArgs[0]);
       case 'renameSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => renameSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            renameSync(positionalArgs[0]);
       case 'copy':
-        return ({positionalArgs, namedArgs, typeArgs}) => copy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            copy(positionalArgs[0]);
       case 'copySync':
-        return ({positionalArgs, namedArgs, typeArgs}) => copySync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            copySync(positionalArgs[0]);
       case 'length':
         return ({positionalArgs, namedArgs, typeArgs}) => length();
       case 'lengthSync':
@@ -99,66 +110,103 @@ extension FileBinding on File {
       case 'lastAccessedSync':
         return ({positionalArgs, namedArgs, typeArgs}) => lastAccessedSync();
       case 'setLastAccessed':
-        return ({positionalArgs, namedArgs, typeArgs}) => setLastAccessed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setLastAccessed(positionalArgs[0]);
       case 'setLastAccessedSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => setLastAccessedSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setLastAccessedSync(positionalArgs[0]);
       case 'lastModified':
         return ({positionalArgs, namedArgs, typeArgs}) => lastModified();
       case 'lastModifiedSync':
         return ({positionalArgs, namedArgs, typeArgs}) => lastModifiedSync();
       case 'setLastModified':
-        return ({positionalArgs, namedArgs, typeArgs}) => setLastModified(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setLastModified(positionalArgs[0]);
       case 'setLastModifiedSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => setLastModifiedSync(positionalArgs[0]);
-      case 'open':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            open(mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : FileMode.read);
+            setLastModifiedSync(positionalArgs[0]);
+      case 'open':
+        return ({positionalArgs, namedArgs, typeArgs}) => open(
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : FileMode.read);
       case 'openSync':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            openSync(mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : FileMode.read);
+        return ({positionalArgs, namedArgs, typeArgs}) => openSync(
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : FileMode.read);
       case 'openRead':
         return ({positionalArgs, namedArgs, typeArgs}) => openRead(
-            positionalArgs.length > 0 ? positionalArgs[0] : null, positionalArgs.length > 1 ? positionalArgs[1] : null);
+            positionalArgs.length > 0 ? positionalArgs[0] : null,
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'openWrite':
         return ({positionalArgs, namedArgs, typeArgs}) => openWrite(
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : FileMode.write,
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : FileMode.write,
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8);
       case 'readAsBytes':
         return ({positionalArgs, namedArgs, typeArgs}) => readAsBytes();
       case 'readAsBytesSync':
         return ({positionalArgs, namedArgs, typeArgs}) => readAsBytesSync();
       case 'readAsString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            readAsString(encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) => readAsString(
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8);
       case 'readAsStringSync':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            readAsStringSync(encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) => readAsStringSync(
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8);
       case 'readAsLines':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            readAsLines(encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) => readAsLines(
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8);
       case 'readAsLinesSync':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            readAsLinesSync(encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) => readAsLinesSync(
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8);
       case 'writeAsBytes':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeAsBytes(List<int>.from(positionalArgs[0]),
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : FileMode.write,
+        return ({positionalArgs, namedArgs, typeArgs}) => writeAsBytes(
+            List<int>.from(positionalArgs[0]),
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : FileMode.write,
             flush: namedArgs.containsKey('flush') ? namedArgs['flush'] : false);
       case 'writeAsBytesSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeAsBytesSync(List<int>.from(positionalArgs[0]),
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : FileMode.write,
+        return ({positionalArgs, namedArgs, typeArgs}) => writeAsBytesSync(
+            List<int>.from(positionalArgs[0]),
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : FileMode.write,
             flush: namedArgs.containsKey('flush') ? namedArgs['flush'] : false);
       case 'writeAsString':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeAsString(positionalArgs[0],
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : FileMode.write,
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8,
+        return ({positionalArgs, namedArgs, typeArgs}) => writeAsString(
+            positionalArgs[0],
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : FileMode.write,
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8,
             flush: namedArgs.containsKey('flush') ? namedArgs['flush'] : false);
       case 'writeAsStringSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeAsStringSync(positionalArgs[0],
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : FileMode.write,
-            encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8,
+        return ({positionalArgs, namedArgs, typeArgs}) => writeAsStringSync(
+            positionalArgs[0],
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : FileMode.write,
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8,
             flush: namedArgs.containsKey('flush') ? namedArgs['flush'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -175,7 +223,7 @@ class FileSystemExceptionAutoBinding extends HTExternalClass {
             positionalArgs.length > 1 ? positionalArgs[1] : '',
             positionalArgs.length > 2 ? positionalArgs[2] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -189,7 +237,7 @@ extension FileSystemExceptionBinding on FileSystemException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FileSystemException');
+        return const HTType('FileSystemException');
       case 'message':
         return message;
       case 'path':
@@ -199,7 +247,7 @@ extension FileSystemExceptionBinding on FileSystemException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/file_system_entity.g.dart b/lib/bindings/dart/io/file_system_entity.g.dart
index 3e57f33..4473832 100644
--- a/lib/bindings/dart/io/file_system_entity.g.dart
+++ b/lib/bindings/dart/io/file_system_entity.g.dart
@@ -16,7 +16,7 @@ class FileSystemEntityTypeAutoBinding extends HTExternalClass {
       case 'FileSystemEntityType.notFound':
         return FileSystemEntityType.notFound;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -28,11 +28,13 @@ class FileStatAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FileStat.statSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileStat.statSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileStat.statSync(positionalArgs[0]);
       case 'FileStat.stat':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileStat.stat(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileStat.stat(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,31 +50,45 @@ class FileSystemEntityAutoBinding extends HTExternalClass {
             FileSystemEntity.identical(positionalArgs[0], positionalArgs[1]);
       case 'FileSystemEntity.identicalSync':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FileSystemEntity.identicalSync(positionalArgs[0], positionalArgs[1]);
+            FileSystemEntity.identicalSync(
+                positionalArgs[0], positionalArgs[1]);
       case 'FileSystemEntity.type':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.type(positionalArgs[0],
-            followLinks: namedArgs.containsKey('followLinks') ? namedArgs['followLinks'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.type(
+            positionalArgs[0],
+            followLinks: namedArgs.containsKey('followLinks')
+                ? namedArgs['followLinks']
+                : true);
       case 'FileSystemEntity.typeSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.typeSync(positionalArgs[0],
-            followLinks: namedArgs.containsKey('followLinks') ? namedArgs['followLinks'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.typeSync(positionalArgs[0],
+                followLinks: namedArgs.containsKey('followLinks')
+                    ? namedArgs['followLinks']
+                    : true);
       case 'FileSystemEntity.isLink':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.isLink(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.isLink(positionalArgs[0]);
       case 'FileSystemEntity.isFile':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.isFile(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.isFile(positionalArgs[0]);
       case 'FileSystemEntity.isDirectory':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.isDirectory(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.isDirectory(positionalArgs[0]);
       case 'FileSystemEntity.isLinkSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.isLinkSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.isLinkSync(positionalArgs[0]);
       case 'FileSystemEntity.isFileSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.isFileSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.isFileSync(positionalArgs[0]);
       case 'FileSystemEntity.isDirectorySync':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.isDirectorySync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.isDirectorySync(positionalArgs[0]);
       case 'FileSystemEntity.parentOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => FileSystemEntity.parentOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FileSystemEntity.parentOf(positionalArgs[0]);
       case 'FileSystemEntity.isWatchSupported':
         return FileSystemEntity.isWatchSupported;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -94,7 +110,7 @@ class FileSystemEventAutoBinding extends HTExternalClass {
       case 'FileSystemEvent.all':
         return FileSystemEvent.all;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/io_sink.g.dart b/lib/bindings/dart/io/io_sink.g.dart
index f35c29c..4b02c0e 100644
--- a/lib/bindings/dart/io/io_sink.g.dart
+++ b/lib/bindings/dart/io/io_sink.g.dart
@@ -9,10 +9,13 @@ class IOSinkAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IOSink':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            IOSink(positionalArgs[0], encoding: namedArgs.containsKey('encoding') ? namedArgs['encoding'] : utf8);
+        return ({positionalArgs, namedArgs, typeArgs}) => IOSink(
+            positionalArgs[0],
+            encoding: namedArgs.containsKey('encoding')
+                ? namedArgs['encoding']
+                : utf8);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,33 +34,40 @@ extension IOSinkBinding on IOSink {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IOSink');
+        return const HTType('IOSink');
       case 'encoding':
         return encoding;
       case 'done':
         return done;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(List<int>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(List<int>.from(positionalArgs[0]));
       case 'write':
-        return ({positionalArgs, namedArgs, typeArgs}) => write(positionalArgs[0]);
-      case 'writeAll':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            writeAll(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : '');
+            write(positionalArgs[0]);
+      case 'writeAll':
+        return ({positionalArgs, namedArgs, typeArgs}) => writeAll(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : '');
       case 'writeln':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeln(positionalArgs.length > 0 ? positionalArgs[0] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            writeln(positionalArgs.length > 0 ? positionalArgs[0] : '');
       case 'writeCharCode':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeCharCode(positionalArgs[0]);
-      case 'addError':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            addError(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+            writeCharCode(positionalArgs[0]);
+      case 'addError':
+        return ({positionalArgs, namedArgs, typeArgs}) => addError(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'addStream':
-        return ({positionalArgs, namedArgs, typeArgs}) => addStream(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addStream(positionalArgs[0]);
       case 'flush':
         return ({positionalArgs, namedArgs, typeArgs}) => flush();
       case 'close':
         return ({positionalArgs, namedArgs, typeArgs}) => close();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,7 +77,7 @@ extension IOSinkBinding on IOSink {
         encoding = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/link.g.dart b/lib/bindings/dart/io/link.g.dart
index 318f5bd..d32dbf3 100644
--- a/lib/bindings/dart/io/link.g.dart
+++ b/lib/bindings/dart/io/link.g.dart
@@ -8,13 +8,16 @@ class LinkAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Link':
-        return ({positionalArgs, namedArgs, typeArgs}) => Link(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Link(positionalArgs[0]);
       case 'Link.fromRawPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => Link.fromRawPath(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Link.fromRawPath(positionalArgs[0]);
       case 'Link.fromUri':
-        return ({positionalArgs, namedArgs, typeArgs}) => Link.fromUri(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Link.fromUri(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,33 +31,45 @@ extension LinkBinding on Link {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Link');
+        return const HTType('Link');
       case 'absolute':
         return absolute;
       case 'create':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            create(positionalArgs[0], recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => create(
+            positionalArgs[0],
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false);
       case 'createSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => createSync(positionalArgs[0],
-            recursive: namedArgs.containsKey('recursive') ? namedArgs['recursive'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => createSync(
+            positionalArgs[0],
+            recursive: namedArgs.containsKey('recursive')
+                ? namedArgs['recursive']
+                : false);
       case 'updateSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSync(positionalArgs[0]);
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'resolveSymbolicLinks':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveSymbolicLinks();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveSymbolicLinks();
       case 'resolveSymbolicLinksSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveSymbolicLinksSync();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveSymbolicLinksSync();
       case 'rename':
-        return ({positionalArgs, namedArgs, typeArgs}) => rename(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rename(positionalArgs[0]);
       case 'renameSync':
-        return ({positionalArgs, namedArgs, typeArgs}) => renameSync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            renameSync(positionalArgs[0]);
       case 'target':
         return ({positionalArgs, namedArgs, typeArgs}) => target();
       case 'targetSync':
         return ({positionalArgs, namedArgs, typeArgs}) => targetSync();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/overrides.g.dart b/lib/bindings/dart/io/overrides.g.dart
index 1504b2d..5688deb 100644
--- a/lib/bindings/dart/io/overrides.g.dart
+++ b/lib/bindings/dart/io/overrides.g.dart
@@ -8,42 +8,70 @@ class IOOverridesAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IOOverrides.runZoned':
-        return ({positionalArgs, namedArgs, typeArgs}) => IOOverrides.runZoned(positionalArgs[0],
-            createDirectory: namedArgs.containsKey('createDirectory') ? namedArgs['createDirectory'] : null,
-            getCurrentDirectory: namedArgs.containsKey('getCurrentDirectory') ? namedArgs['getCurrentDirectory'] : null,
-            setCurrentDirectory: namedArgs.containsKey('setCurrentDirectory') ? namedArgs['setCurrentDirectory'] : null,
-            getSystemTempDirectory:
-                namedArgs.containsKey('getSystemTempDirectory') ? namedArgs['getSystemTempDirectory'] : null,
-            createFile: namedArgs.containsKey('createFile') ? namedArgs['createFile'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => IOOverrides.runZoned(
+            positionalArgs[0],
+            createDirectory: namedArgs.containsKey('createDirectory')
+                ? namedArgs['createDirectory']
+                : null,
+            getCurrentDirectory: namedArgs.containsKey('getCurrentDirectory')
+                ? namedArgs['getCurrentDirectory']
+                : null,
+            setCurrentDirectory: namedArgs.containsKey('setCurrentDirectory')
+                ? namedArgs['setCurrentDirectory']
+                : null,
+            getSystemTempDirectory: namedArgs.containsKey('getSystemTempDirectory')
+                ? namedArgs['getSystemTempDirectory']
+                : null,
+            createFile: namedArgs.containsKey('createFile')
+                ? namedArgs['createFile']
+                : null,
             stat: namedArgs.containsKey('stat') ? namedArgs['stat'] : null,
-            statSync: namedArgs.containsKey('statSync') ? namedArgs['statSync'] : null,
-            fseIdentical: namedArgs.containsKey('fseIdentical') ? namedArgs['fseIdentical'] : null,
-            fseIdenticalSync: namedArgs.containsKey('fseIdenticalSync') ? namedArgs['fseIdenticalSync'] : null,
-            fseGetType: namedArgs.containsKey('fseGetType') ? namedArgs['fseGetType'] : null,
-            fseGetTypeSync: namedArgs.containsKey('fseGetTypeSync') ? namedArgs['fseGetTypeSync'] : null,
-            fsWatch: namedArgs.containsKey('fsWatch') ? namedArgs['fsWatch'] : null,
-            fsWatchIsSupported: namedArgs.containsKey('fsWatchIsSupported') ? namedArgs['fsWatchIsSupported'] : null,
-            createLink: namedArgs.containsKey('createLink') ? namedArgs['createLink'] : null,
-            socketConnect: namedArgs.containsKey('socketConnect') ? namedArgs['socketConnect'] : null,
+            statSync: namedArgs.containsKey('statSync')
+                ? namedArgs['statSync']
+                : null,
+            fseIdentical: namedArgs.containsKey('fseIdentical')
+                ? namedArgs['fseIdentical']
+                : null,
+            fseIdenticalSync: namedArgs.containsKey('fseIdenticalSync')
+                ? namedArgs['fseIdenticalSync']
+                : null,
+            fseGetType: namedArgs.containsKey('fseGetType')
+                ? namedArgs['fseGetType']
+                : null,
+            fseGetTypeSync: namedArgs.containsKey('fseGetTypeSync')
+                ? namedArgs['fseGetTypeSync']
+                : null,
+            fsWatch:
+                namedArgs.containsKey('fsWatch') ? namedArgs['fsWatch'] : null,
+            fsWatchIsSupported: namedArgs.containsKey('fsWatchIsSupported')
+                ? namedArgs['fsWatchIsSupported']
+                : null,
+            createLink: namedArgs.containsKey('createLink')
+                ? namedArgs['createLink']
+                : null,
+            socketConnect:
+                namedArgs.containsKey('socketConnect') ? namedArgs['socketConnect'] : null,
             socketStartConnect: namedArgs.containsKey('socketStartConnect') ? namedArgs['socketStartConnect'] : null,
             serverSocketBind: namedArgs.containsKey('serverSocketBind') ? namedArgs['serverSocketBind'] : null);
       case 'IOOverrides.runWithIOOverrides':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            IOOverrides.runWithIOOverrides(positionalArgs[0], positionalArgs[1]);
+            IOOverrides.runWithIOOverrides(
+                positionalArgs[0], positionalArgs[1]);
       case 'IOOverrides.current':
         return IOOverrides.current;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IOOverrides.global':
         return IOOverrides.global = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/platform.g.dart b/lib/bindings/dart/io/platform.g.dart
index 252e241..10e180e 100644
--- a/lib/bindings/dart/io/platform.g.dart
+++ b/lib/bindings/dart/io/platform.g.dart
@@ -48,7 +48,7 @@ class PlatformAutoBinding extends HTExternalClass {
       case 'Platform.isFuchsia':
         return Platform.isFuchsia;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/process.g.dart b/lib/bindings/dart/io/process.g.dart
index fbc1fec..8e0e296 100644
--- a/lib/bindings/dart/io/process.g.dart
+++ b/lib/bindings/dart/io/process.g.dart
@@ -14,7 +14,7 @@ class ProcessInfoAutoBinding extends HTExternalClass {
       case 'ProcessInfo.maxRss':
         return ProcessInfo.maxRss;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -38,7 +38,7 @@ class ProcessStartModeAutoBinding extends HTExternalClass {
       case 'ProcessStartMode.detachedWithStdio':
         return ProcessStartMode.detachedWithStdio;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -52,37 +52,74 @@ class ProcessAutoBinding extends HTExternalClass {
       case 'Process.start':
         return ({positionalArgs, namedArgs, typeArgs}) => Process.start(
             positionalArgs[0], List<String>.from(positionalArgs[1]),
-            workingDirectory: namedArgs.containsKey('workingDirectory') ? namedArgs['workingDirectory'] : null,
-            environment: namedArgs.containsKey('environment') ? namedArgs['environment'] : null,
+            workingDirectory: namedArgs.containsKey('workingDirectory')
+                ? namedArgs['workingDirectory']
+                : null,
+            environment: namedArgs.containsKey('environment')
+                ? namedArgs['environment']
+                : null,
             includeParentEnvironment:
-                namedArgs.containsKey('includeParentEnvironment') ? namedArgs['includeParentEnvironment'] : true,
-            runInShell: namedArgs.containsKey('runInShell') ? namedArgs['runInShell'] : false,
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : ProcessStartMode.normal);
+                namedArgs.containsKey('includeParentEnvironment')
+                    ? namedArgs['includeParentEnvironment']
+                    : true,
+            runInShell: namedArgs.containsKey('runInShell')
+                ? namedArgs['runInShell']
+                : false,
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : ProcessStartMode.normal);
       case 'Process.run':
         return ({positionalArgs, namedArgs, typeArgs}) => Process.run(
             positionalArgs[0], List<String>.from(positionalArgs[1]),
-            workingDirectory: namedArgs.containsKey('workingDirectory') ? namedArgs['workingDirectory'] : null,
-            environment: namedArgs.containsKey('environment') ? namedArgs['environment'] : null,
+            workingDirectory: namedArgs.containsKey('workingDirectory')
+                ? namedArgs['workingDirectory']
+                : null,
+            environment: namedArgs.containsKey('environment')
+                ? namedArgs['environment']
+                : null,
             includeParentEnvironment:
-                namedArgs.containsKey('includeParentEnvironment') ? namedArgs['includeParentEnvironment'] : true,
-            runInShell: namedArgs.containsKey('runInShell') ? namedArgs['runInShell'] : false,
-            stdoutEncoding: namedArgs.containsKey('stdoutEncoding') ? namedArgs['stdoutEncoding'] : systemEncoding,
-            stderrEncoding: namedArgs.containsKey('stderrEncoding') ? namedArgs['stderrEncoding'] : systemEncoding);
+                namedArgs.containsKey('includeParentEnvironment')
+                    ? namedArgs['includeParentEnvironment']
+                    : true,
+            runInShell: namedArgs.containsKey('runInShell')
+                ? namedArgs['runInShell']
+                : false,
+            stdoutEncoding: namedArgs.containsKey('stdoutEncoding')
+                ? namedArgs['stdoutEncoding']
+                : systemEncoding,
+            stderrEncoding: namedArgs.containsKey('stderrEncoding')
+                ? namedArgs['stderrEncoding']
+                : systemEncoding);
       case 'Process.runSync':
         return ({positionalArgs, namedArgs, typeArgs}) => Process.runSync(
             positionalArgs[0], List<String>.from(positionalArgs[1]),
-            workingDirectory: namedArgs.containsKey('workingDirectory') ? namedArgs['workingDirectory'] : null,
-            environment: namedArgs.containsKey('environment') ? namedArgs['environment'] : null,
+            workingDirectory: namedArgs.containsKey('workingDirectory')
+                ? namedArgs['workingDirectory']
+                : null,
+            environment: namedArgs.containsKey('environment')
+                ? namedArgs['environment']
+                : null,
             includeParentEnvironment:
-                namedArgs.containsKey('includeParentEnvironment') ? namedArgs['includeParentEnvironment'] : true,
-            runInShell: namedArgs.containsKey('runInShell') ? namedArgs['runInShell'] : false,
-            stdoutEncoding: namedArgs.containsKey('stdoutEncoding') ? namedArgs['stdoutEncoding'] : systemEncoding,
-            stderrEncoding: namedArgs.containsKey('stderrEncoding') ? namedArgs['stderrEncoding'] : systemEncoding);
+                namedArgs.containsKey('includeParentEnvironment')
+                    ? namedArgs['includeParentEnvironment']
+                    : true,
+            runInShell: namedArgs.containsKey('runInShell')
+                ? namedArgs['runInShell']
+                : false,
+            stdoutEncoding: namedArgs.containsKey('stdoutEncoding')
+                ? namedArgs['stdoutEncoding']
+                : systemEncoding,
+            stderrEncoding: namedArgs.containsKey('stderrEncoding')
+                ? namedArgs['stderrEncoding']
+                : systemEncoding);
       case 'Process.killPid':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Process.killPid(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : ProcessSignal.sigterm);
+        return ({positionalArgs, namedArgs, typeArgs}) => Process.killPid(
+            positionalArgs[0],
+            positionalArgs.length > 1
+                ? positionalArgs[1]
+                : ProcessSignal.sigterm);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -94,10 +131,13 @@ class ProcessResultAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ProcessResult':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ProcessResult(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => ProcessResult(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -111,7 +151,7 @@ extension ProcessResultBinding on ProcessResult {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ProcessResult');
+        return const HTType('ProcessResult');
       case 'exitCode':
         return exitCode;
       case 'stdout':
@@ -121,7 +161,7 @@ extension ProcessResultBinding on ProcessResult {
       case 'pid':
         return pid;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -191,7 +231,7 @@ class ProcessSignalAutoBinding extends HTExternalClass {
       case 'ProcessSignal.sigsys':
         return ProcessSignal.sigsys;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -203,10 +243,11 @@ class SignalExceptionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SignalException':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            SignalException(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => SignalException(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -220,7 +261,7 @@ extension SignalExceptionBinding on SignalException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SignalException');
+        return const HTType('SignalException');
       case 'message':
         return message;
       case 'osError':
@@ -228,7 +269,7 @@ extension SignalExceptionBinding on SignalException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -246,7 +287,7 @@ class ProcessExceptionAutoBinding extends HTExternalClass {
             positionalArgs.length > 2 ? positionalArgs[2] : '',
             positionalArgs.length > 3 ? positionalArgs[3] : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -260,7 +301,7 @@ extension ProcessExceptionBinding on ProcessException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ProcessException');
+        return const HTType('ProcessException');
       case 'executable':
         return executable;
       case 'arguments':
@@ -272,7 +313,7 @@ extension ProcessExceptionBinding on ProcessException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/secure_server_socket.g.dart b/lib/bindings/dart/io/secure_server_socket.g.dart
index 8ca1263..c7dce8b 100644
--- a/lib/bindings/dart/io/secure_server_socket.g.dart
+++ b/lib/bindings/dart/io/secure_server_socket.g.dart
@@ -8,19 +8,30 @@ class SecureServerSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SecureServerSocket.bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => SecureServerSocket.bind(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            backlog: namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
-            v6Only: namedArgs.containsKey('v6Only') ? namedArgs['v6Only'] : false,
-            requestClientCertificate:
-                namedArgs.containsKey('requestClientCertificate') ? namedArgs['requestClientCertificate'] : false,
-            requireClientCertificate:
-                namedArgs.containsKey('requireClientCertificate') ? namedArgs['requireClientCertificate'] : false,
-            supportedProtocols:
-                namedArgs.containsKey('supportedProtocols') ? List<String>.from(namedArgs['supportedProtocols']) : null,
-            shared: namedArgs.containsKey('shared') ? namedArgs['shared'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SecureServerSocket.bind(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2],
+                backlog:
+                    namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
+                v6Only: namedArgs.containsKey('v6Only')
+                    ? namedArgs['v6Only']
+                    : false,
+                requestClientCertificate:
+                    namedArgs.containsKey('requestClientCertificate')
+                        ? namedArgs['requestClientCertificate']
+                        : false,
+                requireClientCertificate:
+                    namedArgs.containsKey('requireClientCertificate')
+                        ? namedArgs['requireClientCertificate']
+                        : false,
+                supportedProtocols: namedArgs.containsKey('supportedProtocols')
+                    ? List<String>.from(namedArgs['supportedProtocols'])
+                    : null,
+                shared: namedArgs.containsKey('shared')
+                    ? namedArgs['shared']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -32,19 +43,30 @@ class RawSecureServerSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawSecureServerSocket.bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawSecureServerSocket.bind(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            backlog: namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
-            v6Only: namedArgs.containsKey('v6Only') ? namedArgs['v6Only'] : false,
-            requestClientCertificate:
-                namedArgs.containsKey('requestClientCertificate') ? namedArgs['requestClientCertificate'] : false,
-            requireClientCertificate:
-                namedArgs.containsKey('requireClientCertificate') ? namedArgs['requireClientCertificate'] : false,
-            supportedProtocols:
-                namedArgs.containsKey('supportedProtocols') ? List<String>.from(namedArgs['supportedProtocols']) : null,
-            shared: namedArgs.containsKey('shared') ? namedArgs['shared'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawSecureServerSocket.bind(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2],
+                backlog:
+                    namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
+                v6Only: namedArgs.containsKey('v6Only')
+                    ? namedArgs['v6Only']
+                    : false,
+                requestClientCertificate: namedArgs
+                        .containsKey('requestClientCertificate')
+                    ? namedArgs['requestClientCertificate']
+                    : false,
+                requireClientCertificate: namedArgs
+                        .containsKey('requireClientCertificate')
+                    ? namedArgs['requireClientCertificate']
+                    : false,
+                supportedProtocols: namedArgs.containsKey('supportedProtocols')
+                    ? List<String>.from(namedArgs['supportedProtocols'])
+                    : null,
+                shared: namedArgs.containsKey('shared')
+                    ? namedArgs['shared']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/secure_socket.g.dart b/lib/bindings/dart/io/secure_socket.g.dart
index cc75606..7ac12df 100644
--- a/lib/bindings/dart/io/secure_socket.g.dart
+++ b/lib/bindings/dart/io/secure_socket.g.dart
@@ -8,41 +8,65 @@ class SecureSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SecureSocket.connect':
-        return ({positionalArgs, namedArgs, typeArgs}) => SecureSocket.connect(positionalArgs[0], positionalArgs[1],
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            onBadCertificate: namedArgs.containsKey('onBadCertificate') ? namedArgs['onBadCertificate'] : null,
-            supportedProtocols:
-                namedArgs.containsKey('supportedProtocols') ? List<String>.from(namedArgs['supportedProtocols']) : null,
-            timeout: namedArgs.containsKey('timeout') ? namedArgs['timeout'] : null);
-      case 'SecureSocket.startConnect':
-        return ({positionalArgs, namedArgs, typeArgs}) => SecureSocket.startConnect(
+        return ({positionalArgs, namedArgs, typeArgs}) => SecureSocket.connect(
             positionalArgs[0], positionalArgs[1],
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            onBadCertificate: namedArgs.containsKey('onBadCertificate') ? namedArgs['onBadCertificate'] : null,
+            context:
+                namedArgs.containsKey('context') ? namedArgs['context'] : null,
+            onBadCertificate: namedArgs.containsKey('onBadCertificate')
+                ? namedArgs['onBadCertificate']
+                : null,
             supportedProtocols: namedArgs.containsKey('supportedProtocols')
                 ? List<String>.from(namedArgs['supportedProtocols'])
-                : null);
+                : null,
+            timeout:
+                namedArgs.containsKey('timeout') ? namedArgs['timeout'] : null);
+      case 'SecureSocket.startConnect':
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SecureSocket
+                .startConnect(positionalArgs[0], positionalArgs[1],
+                    context: namedArgs.containsKey('context')
+                        ? namedArgs['context']
+                        : null,
+                    onBadCertificate: namedArgs.containsKey('onBadCertificate')
+                        ? namedArgs['onBadCertificate']
+                        : null,
+                    supportedProtocols:
+                        namedArgs.containsKey('supportedProtocols')
+                            ? List<String>.from(namedArgs['supportedProtocols'])
+                            : null);
       case 'SecureSocket.secure':
-        return ({positionalArgs, namedArgs, typeArgs}) => SecureSocket.secure(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => SecureSocket.secure(
+            positionalArgs[0],
             host: namedArgs.containsKey('host') ? namedArgs['host'] : null,
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            onBadCertificate: namedArgs.containsKey('onBadCertificate') ? namedArgs['onBadCertificate'] : null,
+            context:
+                namedArgs.containsKey('context') ? namedArgs['context'] : null,
+            onBadCertificate: namedArgs.containsKey('onBadCertificate')
+                ? namedArgs['onBadCertificate']
+                : null,
             supportedProtocols: namedArgs.containsKey('supportedProtocols')
                 ? List<String>.from(namedArgs['supportedProtocols'])
                 : null);
       case 'SecureSocket.secureServer':
-        return ({positionalArgs, namedArgs, typeArgs}) => SecureSocket.secureServer(
-            positionalArgs[0], positionalArgs[1],
-            bufferedData: namedArgs.containsKey('bufferedData') ? List<int>.from(namedArgs['bufferedData']) : null,
-            requestClientCertificate:
-                namedArgs.containsKey('requestClientCertificate') ? namedArgs['requestClientCertificate'] : false,
-            requireClientCertificate:
-                namedArgs.containsKey('requireClientCertificate') ? namedArgs['requireClientCertificate'] : false,
-            supportedProtocols: namedArgs.containsKey('supportedProtocols')
-                ? List<String>.from(namedArgs['supportedProtocols'])
-                : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SecureSocket
+                .secureServer(positionalArgs[0], positionalArgs[1],
+                    bufferedData: namedArgs.containsKey('bufferedData')
+                        ? List<int>.from(namedArgs['bufferedData'])
+                        : null,
+                    requestClientCertificate:
+                        namedArgs.containsKey('requestClientCertificate')
+                            ? namedArgs['requestClientCertificate']
+                            : false,
+                    requireClientCertificate:
+                        namedArgs.containsKey('requireClientCertificate')
+                            ? namedArgs['requireClientCertificate']
+                            : false,
+                    supportedProtocols:
+                        namedArgs.containsKey('supportedProtocols')
+                            ? List<String>.from(namedArgs['supportedProtocols'])
+                            : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,43 +78,70 @@ class RawSecureSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawSecureSocket.connect':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawSecureSocket.connect(positionalArgs[0], positionalArgs[1],
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            onBadCertificate: namedArgs.containsKey('onBadCertificate') ? namedArgs['onBadCertificate'] : null,
-            supportedProtocols:
-                namedArgs.containsKey('supportedProtocols') ? List<String>.from(namedArgs['supportedProtocols']) : null,
-            timeout: namedArgs.containsKey('timeout') ? namedArgs['timeout'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawSecureSocket.connect(positionalArgs[0], positionalArgs[1],
+                context: namedArgs.containsKey('context')
+                    ? namedArgs['context']
+                    : null,
+                onBadCertificate: namedArgs.containsKey('onBadCertificate')
+                    ? namedArgs['onBadCertificate']
+                    : null,
+                supportedProtocols: namedArgs.containsKey('supportedProtocols')
+                    ? List<String>.from(namedArgs['supportedProtocols'])
+                    : null,
+                timeout: namedArgs.containsKey('timeout')
+                    ? namedArgs['timeout']
+                    : null);
       case 'RawSecureSocket.startConnect':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawSecureSocket.startConnect(
-            positionalArgs[0], positionalArgs[1],
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            onBadCertificate: namedArgs.containsKey('onBadCertificate') ? namedArgs['onBadCertificate'] : null,
-            supportedProtocols: namedArgs.containsKey('supportedProtocols')
-                ? List<String>.from(namedArgs['supportedProtocols'])
-                : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawSecureSocket.startConnect(positionalArgs[0], positionalArgs[1],
+                context: namedArgs.containsKey('context')
+                    ? namedArgs['context']
+                    : null,
+                onBadCertificate: namedArgs.containsKey('onBadCertificate')
+                    ? namedArgs['onBadCertificate']
+                    : null,
+                supportedProtocols: namedArgs.containsKey('supportedProtocols')
+                    ? List<String>.from(namedArgs['supportedProtocols'])
+                    : null);
       case 'RawSecureSocket.secure':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawSecureSocket.secure(positionalArgs[0],
-            subscription: namedArgs.containsKey('subscription') ? namedArgs['subscription'] : null,
-            host: namedArgs.containsKey('host') ? namedArgs['host'] : null,
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            onBadCertificate: namedArgs.containsKey('onBadCertificate') ? namedArgs['onBadCertificate'] : null,
-            supportedProtocols: namedArgs.containsKey('supportedProtocols')
-                ? List<String>.from(namedArgs['supportedProtocols'])
-                : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawSecureSocket.secure(positionalArgs[0],
+                subscription: namedArgs.containsKey('subscription')
+                    ? namedArgs['subscription']
+                    : null,
+                host: namedArgs.containsKey('host') ? namedArgs['host'] : null,
+                context: namedArgs.containsKey('context')
+                    ? namedArgs['context']
+                    : null,
+                onBadCertificate: namedArgs.containsKey('onBadCertificate')
+                    ? namedArgs['onBadCertificate']
+                    : null,
+                supportedProtocols: namedArgs.containsKey('supportedProtocols')
+                    ? List<String>.from(namedArgs['supportedProtocols'])
+                    : null);
       case 'RawSecureSocket.secureServer':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawSecureSocket.secureServer(
-            positionalArgs[0], positionalArgs[1],
-            subscription: namedArgs.containsKey('subscription') ? namedArgs['subscription'] : null,
-            bufferedData: namedArgs.containsKey('bufferedData') ? List<int>.from(namedArgs['bufferedData']) : null,
-            requestClientCertificate:
-                namedArgs.containsKey('requestClientCertificate') ? namedArgs['requestClientCertificate'] : false,
-            requireClientCertificate:
-                namedArgs.containsKey('requireClientCertificate') ? namedArgs['requireClientCertificate'] : false,
-            supportedProtocols: namedArgs.containsKey('supportedProtocols')
-                ? List<String>.from(namedArgs['supportedProtocols'])
-                : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawSecureSocket.secureServer(positionalArgs[0], positionalArgs[1],
+                subscription: namedArgs.containsKey('subscription')
+                    ? namedArgs['subscription']
+                    : null,
+                bufferedData: namedArgs.containsKey('bufferedData')
+                    ? List<int>.from(namedArgs['bufferedData'])
+                    : null,
+                requestClientCertificate:
+                    namedArgs.containsKey('requestClientCertificate')
+                        ? namedArgs['requestClientCertificate']
+                        : false,
+                requireClientCertificate:
+                    namedArgs.containsKey('requireClientCertificate')
+                        ? namedArgs['requireClientCertificate']
+                        : false,
+                supportedProtocols: namedArgs.containsKey('supportedProtocols')
+                    ? List<String>.from(namedArgs['supportedProtocols'])
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -103,9 +154,10 @@ class TlsExceptionAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TlsException':
         return ({positionalArgs, namedArgs, typeArgs}) => TlsException(
-            positionalArgs.length > 0 ? positionalArgs[0] : '', positionalArgs.length > 1 ? positionalArgs[1] : null);
+            positionalArgs.length > 0 ? positionalArgs[0] : '',
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -119,7 +171,7 @@ extension TlsExceptionBinding on TlsException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TlsException');
+        return const HTType('TlsException');
       case 'type':
         return type;
       case 'message':
@@ -129,7 +181,7 @@ extension TlsExceptionBinding on TlsException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -142,9 +194,10 @@ class HandshakeExceptionAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'HandshakeException':
         return ({positionalArgs, namedArgs, typeArgs}) => HandshakeException(
-            positionalArgs.length > 0 ? positionalArgs[0] : '', positionalArgs.length > 1 ? positionalArgs[1] : null);
+            positionalArgs.length > 0 ? positionalArgs[0] : '',
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -158,7 +211,7 @@ extension HandshakeExceptionBinding on HandshakeException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HandshakeException');
+        return const HTType('HandshakeException');
       case 'type':
         return type;
       case 'message':
@@ -168,7 +221,7 @@ extension HandshakeExceptionBinding on HandshakeException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -181,9 +234,10 @@ class CertificateExceptionAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'CertificateException':
         return ({positionalArgs, namedArgs, typeArgs}) => CertificateException(
-            positionalArgs.length > 0 ? positionalArgs[0] : '', positionalArgs.length > 1 ? positionalArgs[1] : null);
+            positionalArgs.length > 0 ? positionalArgs[0] : '',
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -197,7 +251,7 @@ extension CertificateExceptionBinding on CertificateException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CertificateException');
+        return const HTType('CertificateException');
       case 'type':
         return type;
       case 'message':
@@ -207,7 +261,7 @@ extension CertificateExceptionBinding on CertificateException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/security_context.g.dart b/lib/bindings/dart/io/security_context.g.dart
index 1363e29..28b5a3b 100644
--- a/lib/bindings/dart/io/security_context.g.dart
+++ b/lib/bindings/dart/io/security_context.g.dart
@@ -9,11 +9,13 @@ class SecurityContextAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SecurityContext':
         return ({positionalArgs, namedArgs, typeArgs}) => SecurityContext(
-            withTrustedRoots: namedArgs.containsKey('withTrustedRoots') ? namedArgs['withTrustedRoots'] : false);
+            withTrustedRoots: namedArgs.containsKey('withTrustedRoots')
+                ? namedArgs['withTrustedRoots']
+                : false);
       case 'SecurityContext.defaultContext':
         return SecurityContext.defaultContext;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,36 +29,60 @@ extension SecurityContextBinding on SecurityContext {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SecurityContext');
+        return const HTType('SecurityContext');
       case 'usePrivateKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => usePrivateKey(positionalArgs[0],
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => usePrivateKey(
+            positionalArgs[0],
+            password: namedArgs.containsKey('password')
+                ? namedArgs['password']
+                : null);
       case 'usePrivateKeyBytes':
-        return ({positionalArgs, namedArgs, typeArgs}) => usePrivateKeyBytes(List<int>.from(positionalArgs[0]),
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => usePrivateKeyBytes(
+            List<int>.from(positionalArgs[0]),
+            password: namedArgs.containsKey('password')
+                ? namedArgs['password']
+                : null);
       case 'setTrustedCertificates':
-        return ({positionalArgs, namedArgs, typeArgs}) => setTrustedCertificates(positionalArgs[0],
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setTrustedCertificates(positionalArgs[0],
+                password: namedArgs.containsKey('password')
+                    ? namedArgs['password']
+                    : null);
       case 'setTrustedCertificatesBytes':
-        return ({positionalArgs, namedArgs, typeArgs}) => setTrustedCertificatesBytes(List<int>.from(positionalArgs[0]),
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setTrustedCertificatesBytes(List<int>.from(positionalArgs[0]),
+                password: namedArgs.containsKey('password')
+                    ? namedArgs['password']
+                    : null);
       case 'useCertificateChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => useCertificateChain(positionalArgs[0],
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => useCertificateChain(
+            positionalArgs[0],
+            password: namedArgs.containsKey('password')
+                ? namedArgs['password']
+                : null);
       case 'useCertificateChainBytes':
-        return ({positionalArgs, namedArgs, typeArgs}) => useCertificateChainBytes(List<int>.from(positionalArgs[0]),
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            useCertificateChainBytes(List<int>.from(positionalArgs[0]),
+                password: namedArgs.containsKey('password')
+                    ? namedArgs['password']
+                    : null);
       case 'setClientAuthorities':
-        return ({positionalArgs, namedArgs, typeArgs}) => setClientAuthorities(positionalArgs[0],
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => setClientAuthorities(
+            positionalArgs[0],
+            password: namedArgs.containsKey('password')
+                ? namedArgs['password']
+                : null);
       case 'setClientAuthoritiesBytes':
-        return ({positionalArgs, namedArgs, typeArgs}) => setClientAuthoritiesBytes(List<int>.from(positionalArgs[0]),
-            password: namedArgs.containsKey('password') ? namedArgs['password'] : null);
-      case 'setAlpnProtocols':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            setAlpnProtocols(List<String>.from(positionalArgs[0]), positionalArgs[1]);
+            setClientAuthoritiesBytes(List<int>.from(positionalArgs[0]),
+                password: namedArgs.containsKey('password')
+                    ? namedArgs['password']
+                    : null);
+      case 'setAlpnProtocols':
+        return ({positionalArgs, namedArgs, typeArgs}) => setAlpnProtocols(
+            List<String>.from(positionalArgs[0]), positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/socket.g.dart b/lib/bindings/dart/io/socket.g.dart
index 688141e..77b11ae 100644
--- a/lib/bindings/dart/io/socket.g.dart
+++ b/lib/bindings/dart/io/socket.g.dart
@@ -16,7 +16,7 @@ class InternetAddressTypeAutoBinding extends HTExternalClass {
       case 'InternetAddressType.any':
         return InternetAddressType.any;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -28,16 +28,22 @@ class InternetAddressAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'InternetAddress':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            InternetAddress(positionalArgs[0], type: namedArgs.containsKey('type') ? namedArgs['type'] : null);
-      case 'InternetAddress.fromRawAddress':
-        return ({positionalArgs, namedArgs, typeArgs}) => InternetAddress.fromRawAddress(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => InternetAddress(
+            positionalArgs[0],
             type: namedArgs.containsKey('type') ? namedArgs['type'] : null);
+      case 'InternetAddress.fromRawAddress':
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InternetAddress.fromRawAddress(positionalArgs[0],
+                type: namedArgs.containsKey('type') ? namedArgs['type'] : null);
       case 'InternetAddress.lookup':
-        return ({positionalArgs, namedArgs, typeArgs}) => InternetAddress.lookup(positionalArgs[0],
-            type: namedArgs.containsKey('type') ? namedArgs['type'] : InternetAddressType.any);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InternetAddress.lookup(positionalArgs[0],
+                type: namedArgs.containsKey('type')
+                    ? namedArgs['type']
+                    : InternetAddressType.any);
       case 'InternetAddress.tryParse':
-        return ({positionalArgs, namedArgs, typeArgs}) => InternetAddress.tryParse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InternetAddress.tryParse(positionalArgs[0]);
       case 'InternetAddress.loopbackIPv4':
         return InternetAddress.loopbackIPv4;
       case 'InternetAddress.loopbackIPv6':
@@ -47,7 +53,7 @@ class InternetAddressAutoBinding extends HTExternalClass {
       case 'InternetAddress.anyIPv6':
         return InternetAddress.anyIPv6;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -61,7 +67,7 @@ extension InternetAddressBinding on InternetAddress {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InternetAddress');
+        return const HTType('InternetAddress');
       case 'type':
         return type;
       case 'address':
@@ -79,7 +85,7 @@ extension InternetAddressBinding on InternetAddress {
       case 'reverse':
         return ({positionalArgs, namedArgs, typeArgs}) => reverse();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -92,13 +98,19 @@ class NetworkInterfaceAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'NetworkInterface.list':
         return ({positionalArgs, namedArgs, typeArgs}) => NetworkInterface.list(
-            includeLoopback: namedArgs.containsKey('includeLoopback') ? namedArgs['includeLoopback'] : false,
-            includeLinkLocal: namedArgs.containsKey('includeLinkLocal') ? namedArgs['includeLinkLocal'] : false,
-            type: namedArgs.containsKey('type') ? namedArgs['type'] : InternetAddressType.any);
+            includeLoopback: namedArgs.containsKey('includeLoopback')
+                ? namedArgs['includeLoopback']
+                : false,
+            includeLinkLocal: namedArgs.containsKey('includeLinkLocal')
+                ? namedArgs['includeLinkLocal']
+                : false,
+            type: namedArgs.containsKey('type')
+                ? namedArgs['type']
+                : InternetAddressType.any);
       case 'NetworkInterface.listSupported':
         return NetworkInterface.listSupported;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -110,12 +122,16 @@ class RawServerSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawServerSocket.bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawServerSocket.bind(positionalArgs[0], positionalArgs[1],
-            backlog: namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
-            v6Only: namedArgs.containsKey('v6Only') ? namedArgs['v6Only'] : false,
-            shared: namedArgs.containsKey('shared') ? namedArgs['shared'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => RawServerSocket.bind(
+            positionalArgs[0], positionalArgs[1],
+            backlog:
+                namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
+            v6Only:
+                namedArgs.containsKey('v6Only') ? namedArgs['v6Only'] : false,
+            shared:
+                namedArgs.containsKey('shared') ? namedArgs['shared'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -127,12 +143,16 @@ class ServerSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ServerSocket.bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => ServerSocket.bind(positionalArgs[0], positionalArgs[1],
-            backlog: namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
-            v6Only: namedArgs.containsKey('v6Only') ? namedArgs['v6Only'] : false,
-            shared: namedArgs.containsKey('shared') ? namedArgs['shared'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => ServerSocket.bind(
+            positionalArgs[0], positionalArgs[1],
+            backlog:
+                namedArgs.containsKey('backlog') ? namedArgs['backlog'] : 0,
+            v6Only:
+                namedArgs.containsKey('v6Only') ? namedArgs['v6Only'] : false,
+            shared:
+                namedArgs.containsKey('shared') ? namedArgs['shared'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -150,7 +170,7 @@ class SocketDirectionAutoBinding extends HTExternalClass {
       case 'SocketDirection.both':
         return SocketDirection.both;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -164,7 +184,7 @@ class SocketOptionAutoBinding extends HTExternalClass {
       case 'SocketOption.tcpNoDelay':
         return SocketOption.tcpNoDelay;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -176,14 +196,16 @@ class RawSocketOptionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawSocketOption':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RawSocketOption(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => RawSocketOption(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'RawSocketOption.fromInt':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RawSocketOption.fromInt(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            RawSocketOption.fromInt(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'RawSocketOption.fromBool':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RawSocketOption.fromBool(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            RawSocketOption.fromBool(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'RawSocketOption.levelSocket':
         return RawSocketOption.levelSocket;
       case 'RawSocketOption.levelIPv4':
@@ -199,7 +221,7 @@ class RawSocketOptionAutoBinding extends HTExternalClass {
       case 'RawSocketOption.levelUdp':
         return RawSocketOption.levelUdp;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -213,7 +235,7 @@ extension RawSocketOptionBinding on RawSocketOption {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawSocketOption');
+        return const HTType('RawSocketOption');
       case 'level':
         return level;
       case 'option':
@@ -221,7 +243,7 @@ extension RawSocketOptionBinding on RawSocketOption {
       case 'value':
         return value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -241,7 +263,7 @@ class RawSocketEventAutoBinding extends HTExternalClass {
       case 'RawSocketEvent.closed':
         return RawSocketEvent.closed;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -253,14 +275,21 @@ class RawSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawSocket.connect':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawSocket.connect(positionalArgs[0], positionalArgs[1],
-            sourceAddress: namedArgs.containsKey('sourceAddress') ? namedArgs['sourceAddress'] : null,
-            timeout: namedArgs.containsKey('timeout') ? namedArgs['timeout'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => RawSocket.connect(
+            positionalArgs[0], positionalArgs[1],
+            sourceAddress: namedArgs.containsKey('sourceAddress')
+                ? namedArgs['sourceAddress']
+                : null,
+            timeout:
+                namedArgs.containsKey('timeout') ? namedArgs['timeout'] : null);
       case 'RawSocket.startConnect':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawSocket.startConnect(positionalArgs[0], positionalArgs[1],
-            sourceAddress: namedArgs.containsKey('sourceAddress') ? namedArgs['sourceAddress'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawSocket.startConnect(positionalArgs[0], positionalArgs[1],
+                sourceAddress: namedArgs.containsKey('sourceAddress')
+                    ? namedArgs['sourceAddress']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -272,14 +301,21 @@ class SocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Socket.connect':
-        return ({positionalArgs, namedArgs, typeArgs}) => Socket.connect(positionalArgs[0], positionalArgs[1],
-            sourceAddress: namedArgs.containsKey('sourceAddress') ? namedArgs['sourceAddress'] : null,
-            timeout: namedArgs.containsKey('timeout') ? namedArgs['timeout'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Socket.connect(
+            positionalArgs[0], positionalArgs[1],
+            sourceAddress: namedArgs.containsKey('sourceAddress')
+                ? namedArgs['sourceAddress']
+                : null,
+            timeout:
+                namedArgs.containsKey('timeout') ? namedArgs['timeout'] : null);
       case 'Socket.startConnect':
-        return ({positionalArgs, namedArgs, typeArgs}) => Socket.startConnect(positionalArgs[0], positionalArgs[1],
-            sourceAddress: namedArgs.containsKey('sourceAddress') ? namedArgs['sourceAddress'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Socket.startConnect(
+            positionalArgs[0], positionalArgs[1],
+            sourceAddress: namedArgs.containsKey('sourceAddress')
+                ? namedArgs['sourceAddress']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -294,7 +330,7 @@ class DatagramAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Datagram(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -313,7 +349,7 @@ extension DatagramBinding on Datagram {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Datagram');
+        return const HTType('Datagram');
       case 'data':
         return data;
       case 'address':
@@ -321,7 +357,7 @@ extension DatagramBinding on Datagram {
       case 'port':
         return port;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -337,7 +373,7 @@ extension DatagramBinding on Datagram {
         port = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -349,12 +385,17 @@ class RawDatagramSocketAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawDatagramSocket.bind':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawDatagramSocket.bind(positionalArgs[0], positionalArgs[1],
-            reuseAddress: namedArgs.containsKey('reuseAddress') ? namedArgs['reuseAddress'] : true,
-            reusePort: namedArgs.containsKey('reusePort') ? namedArgs['reusePort'] : false,
-            ttl: namedArgs.containsKey('ttl') ? namedArgs['ttl'] : 1);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawDatagramSocket.bind(positionalArgs[0], positionalArgs[1],
+                reuseAddress: namedArgs.containsKey('reuseAddress')
+                    ? namedArgs['reuseAddress']
+                    : true,
+                reusePort: namedArgs.containsKey('reusePort')
+                    ? namedArgs['reusePort']
+                    : false,
+                ttl: namedArgs.containsKey('ttl') ? namedArgs['ttl'] : 1);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -366,14 +407,18 @@ class SocketExceptionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SocketException':
-        return ({positionalArgs, namedArgs, typeArgs}) => SocketException(positionalArgs[0],
-            osError: namedArgs.containsKey('osError') ? namedArgs['osError'] : null,
-            address: namedArgs.containsKey('address') ? namedArgs['address'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => SocketException(
+            positionalArgs[0],
+            osError:
+                namedArgs.containsKey('osError') ? namedArgs['osError'] : null,
+            address:
+                namedArgs.containsKey('address') ? namedArgs['address'] : null,
             port: namedArgs.containsKey('port') ? namedArgs['port'] : null);
       case 'SocketException.closed':
-        return ({positionalArgs, namedArgs, typeArgs}) => SocketException.closed();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SocketException.closed();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -387,7 +432,7 @@ extension SocketExceptionBinding on SocketException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SocketException');
+        return const HTType('SocketException');
       case 'message':
         return message;
       case 'osError':
@@ -399,7 +444,7 @@ extension SocketExceptionBinding on SocketException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/stdio.g.dart b/lib/bindings/dart/io/stdio.g.dart
index 88c418c..1d69cfa 100644
--- a/lib/bindings/dart/io/stdio.g.dart
+++ b/lib/bindings/dart/io/stdio.g.dart
@@ -8,10 +8,11 @@ class StdoutExceptionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StdoutException':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            StdoutException(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => StdoutException(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +26,7 @@ extension StdoutExceptionBinding on StdoutException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StdoutException');
+        return const HTType('StdoutException');
       case 'message':
         return message;
       case 'osError':
@@ -33,7 +34,7 @@ extension StdoutExceptionBinding on StdoutException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,10 +46,11 @@ class StdinExceptionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StdinException':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            StdinException(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => StdinException(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,7 +64,7 @@ extension StdinExceptionBinding on StdinException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StdinException');
+        return const HTType('StdinException');
       case 'message':
         return message;
       case 'osError':
@@ -70,7 +72,7 @@ extension StdinExceptionBinding on StdinException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,7 +92,7 @@ class StdioTypeAutoBinding extends HTExternalClass {
       case 'StdioType.other':
         return StdioType.other;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/string_transformer.g.dart b/lib/bindings/dart/io/string_transformer.g.dart
index c367a12..ed4a912 100644
--- a/lib/bindings/dart/io/string_transformer.g.dart
+++ b/lib/bindings/dart/io/string_transformer.g.dart
@@ -10,7 +10,7 @@ class SystemEncodingAutoBinding extends HTExternalClass {
       case 'SystemEncoding':
         return ({positionalArgs, namedArgs, typeArgs}) => SystemEncoding();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +24,7 @@ extension SystemEncodingBinding on SystemEncoding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SystemEncoding');
+        return const HTType('SystemEncoding');
       case 'name':
         return name;
       case 'encoder':
@@ -32,13 +32,16 @@ extension SystemEncodingBinding on SystemEncoding {
       case 'decoder':
         return decoder;
       case 'encode':
-        return ({positionalArgs, namedArgs, typeArgs}) => encode(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encode(positionalArgs[0]);
       case 'decode':
-        return ({positionalArgs, namedArgs, typeArgs}) => decode(List<int>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decode(List<int>.from(positionalArgs[0]));
       case 'decodeStream':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeStream(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeStream(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/io/sync_socket.g.dart b/lib/bindings/dart/io/sync_socket.g.dart
index 59ecced..1800f29 100644
--- a/lib/bindings/dart/io/sync_socket.g.dart
+++ b/lib/bindings/dart/io/sync_socket.g.dart
@@ -9,9 +9,10 @@ class RawSynchronousSocketAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RawSynchronousSocket.connectSync':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RawSynchronousSocket.connectSync(positionalArgs[0], positionalArgs[1]);
+            RawSynchronousSocket.connectSync(
+                positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/math/random.g.dart b/lib/bindings/dart/math/random.g.dart
index 9651aa1..770822e 100644
--- a/lib/bindings/dart/math/random.g.dart
+++ b/lib/bindings/dart/math/random.g.dart
@@ -8,11 +8,12 @@ class RandomAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Random':
-        return ({positionalArgs, namedArgs, typeArgs}) => Random(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Random(positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'Random.secure':
         return ({positionalArgs, namedArgs, typeArgs}) => Random.secure();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,15 +27,16 @@ extension RandomBinding on Random {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Random');
+        return const HTType('Random');
       case 'nextInt':
-        return ({positionalArgs, namedArgs, typeArgs}) => nextInt(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            nextInt(positionalArgs[0]);
       case 'nextDouble':
         return ({positionalArgs, namedArgs, typeArgs}) => nextDouble();
       case 'nextBool':
         return ({positionalArgs, namedArgs, typeArgs}) => nextBool();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/channel_buffers.g.dart b/lib/bindings/dart/ui/channel_buffers.g.dart
index 679ee8a..adb1faf 100644
--- a/lib/bindings/dart/ui/channel_buffers.g.dart
+++ b/lib/bindings/dart/ui/channel_buffers.g.dart
@@ -15,7 +15,7 @@ class ChannelBuffersAutoBinding extends HTExternalClass {
       case 'ChannelBuffers.kControlChannelName':
         return ChannelBuffers.kControlChannelName;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,10 +28,11 @@ class ChannelBuffersAutoBinding extends HTExternalClass {
     return <String, HTExternalFunctionTypedef>{
       'PlatformMessageResponseCallback': (HTFunction function) =>
           (data) => function.call(positionalArgs: [data], namedArgs: const {}),
-      'ChannelCallback': (HTFunction function) =>
-          (data, callback) => function.call(positionalArgs: [data, callback], namedArgs: const {}),
-      'DrainChannelCallback': (HTFunction function) =>
-          (data, callback) => function.call(positionalArgs: [data, callback], namedArgs: const {}) as Future<void>,
+      'ChannelCallback': (HTFunction function) => (data, callback) =>
+          function.call(positionalArgs: [data, callback], namedArgs: const {}),
+      'DrainChannelCallback': (HTFunction function) => (data, callback) =>
+          function.call(positionalArgs: [data, callback], namedArgs: const {})
+              as Future<void>,
     };
   }
 }
@@ -40,23 +41,30 @@ extension ChannelBuffersBinding on ChannelBuffers {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ChannelBuffers');
+        return const HTType('ChannelBuffers');
       case 'push':
-        return ({positionalArgs, namedArgs, typeArgs}) => push(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            push(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'setListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => setListener(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setListener(positionalArgs[0], positionalArgs[1]);
       case 'clearListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => clearListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            clearListener(positionalArgs[0]);
       case 'drain':
-        return ({positionalArgs, namedArgs, typeArgs}) => drain(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drain(positionalArgs[0], positionalArgs[1]);
       case 'handleMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleMessage(positionalArgs[0]);
       case 'resize':
-        return ({positionalArgs, namedArgs, typeArgs}) => resize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resize(positionalArgs[0], positionalArgs[1]);
       case 'allowOverflow':
-        return ({positionalArgs, namedArgs, typeArgs}) => allowOverflow(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            allowOverflow(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/compositing.g.dart b/lib/bindings/dart/ui/compositing.g.dart
index 124ea5d..1cd5670 100644
--- a/lib/bindings/dart/ui/compositing.g.dart
+++ b/lib/bindings/dart/ui/compositing.g.dart
@@ -10,7 +10,7 @@ class SceneBuilderAutoBinding extends HTExternalClass {
       case 'SceneBuilder':
         return ({positionalArgs, namedArgs, typeArgs}) => SceneBuilder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,89 +24,160 @@ extension SceneBuilderBinding on SceneBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SceneBuilder');
+        return const HTType('SceneBuilder');
       case 'pushTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushTransform(positionalArgs[0],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushTransform(
+            positionalArgs[0],
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushOffset(positionalArgs[0], positionalArgs[1],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushOffset(
+            positionalArgs[0], positionalArgs[1],
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushClipRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushClipRect(positionalArgs[0],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushClipRect(
+            positionalArgs[0],
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushClipRRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushClipRRect(positionalArgs[0],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushClipRRect(
+            positionalArgs[0],
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushClipPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushClipPath(positionalArgs[0],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushClipPath(
+            positionalArgs[0],
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushOpacity':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushOpacity(positionalArgs[0],
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushOpacity(
+            positionalArgs[0],
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushColorFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushColorFilter(positionalArgs[0],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushColorFilter(
+            positionalArgs[0],
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushImageFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushImageFilter(positionalArgs[0],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushImageFilter(
+            positionalArgs[0],
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushBackdropFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushBackdropFilter(positionalArgs[0],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushBackdropFilter(
+            positionalArgs[0],
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushShaderMask':
         return ({positionalArgs, namedArgs, typeArgs}) => pushShaderMask(
             positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushPhysicalShape':
         return ({positionalArgs, namedArgs, typeArgs}) => pushPhysicalShape(
             path: namedArgs.containsKey('path') ? namedArgs['path'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pop':
         return ({positionalArgs, namedArgs, typeArgs}) => pop();
       case 'addRetained':
-        return ({positionalArgs, namedArgs, typeArgs}) => addRetained(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addRetained(positionalArgs[0]);
       case 'addPerformanceOverlay':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPerformanceOverlay(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPerformanceOverlay(positionalArgs[0], positionalArgs[1]);
       case 'addPicture':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPicture(positionalArgs[0], positionalArgs[1],
-            isComplexHint: namedArgs.containsKey('isComplexHint') ? namedArgs['isComplexHint'] : false,
-            willChangeHint: namedArgs.containsKey('willChangeHint') ? namedArgs['willChangeHint'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => addPicture(
+            positionalArgs[0], positionalArgs[1],
+            isComplexHint: namedArgs.containsKey('isComplexHint')
+                ? namedArgs['isComplexHint']
+                : false,
+            willChangeHint: namedArgs.containsKey('willChangeHint')
+                ? namedArgs['willChangeHint']
+                : false);
       case 'addTexture':
-        return ({positionalArgs, namedArgs, typeArgs}) => addTexture(positionalArgs[0],
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
+        return ({positionalArgs, namedArgs, typeArgs}) => addTexture(
+            positionalArgs[0],
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : 0.0,
             height: namedArgs.containsKey('height') ? namedArgs['height'] : 0.0,
-            freeze: namedArgs.containsKey('freeze') ? namedArgs['freeze'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low);
+            freeze:
+                namedArgs.containsKey('freeze') ? namedArgs['freeze'] : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low);
       case 'addPlatformView':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPlatformView(positionalArgs[0],
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
+        return ({positionalArgs, namedArgs, typeArgs}) => addPlatformView(
+            positionalArgs[0],
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : 0.0,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : 0.0);
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : 0.0);
       case 'addChildScene':
         return ({positionalArgs, namedArgs, typeArgs}) => addChildScene(
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : 0.0,
             height: namedArgs.containsKey('height') ? namedArgs['height'] : 0.0,
-            sceneHost: namedArgs.containsKey('sceneHost') ? namedArgs['sceneHost'] : null,
-            hitTestable: namedArgs.containsKey('hitTestable') ? namedArgs['hitTestable'] : true);
+            sceneHost: namedArgs.containsKey('sceneHost')
+                ? namedArgs['sceneHost']
+                : null,
+            hitTestable: namedArgs.containsKey('hitTestable')
+                ? namedArgs['hitTestable']
+                : true);
       case 'setRasterizerTracingThreshold':
-        return ({positionalArgs, namedArgs, typeArgs}) => setRasterizerTracingThreshold(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setRasterizerTracingThreshold(positionalArgs[0]);
       case 'setCheckerboardRasterCacheImages':
-        return ({positionalArgs, namedArgs, typeArgs}) => setCheckerboardRasterCacheImages(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setCheckerboardRasterCacheImages(positionalArgs[0]);
       case 'setCheckerboardOffscreenLayers':
-        return ({positionalArgs, namedArgs, typeArgs}) => setCheckerboardOffscreenLayers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setCheckerboardOffscreenLayers(positionalArgs[0]);
       case 'build':
         return ({positionalArgs, namedArgs, typeArgs}) => build();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -118,10 +189,13 @@ class SceneHostAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SceneHost':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            SceneHost(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => SceneHost(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -135,14 +209,20 @@ extension SceneHostBinding on SceneHost {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SceneHost');
+        return const HTType('SceneHost');
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'setProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => setProperties(positionalArgs[0], positionalArgs[1],
-            positionalArgs[2], positionalArgs[3], positionalArgs[4], positionalArgs[5], positionalArgs[6]);
+        return ({positionalArgs, namedArgs, typeArgs}) => setProperties(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4],
+            positionalArgs[5],
+            positionalArgs[6]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/geometry.g.dart b/lib/bindings/dart/ui/geometry.g.dart
index 34a7501..f665dde 100644
--- a/lib/bindings/dart/ui/geometry.g.dart
+++ b/lib/bindings/dart/ui/geometry.g.dart
@@ -8,19 +8,21 @@ class OffsetAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Offset':
-        return ({positionalArgs, namedArgs, typeArgs}) => Offset(positionalArgs[0], positionalArgs[1]);
-      case 'Offset.fromDirection':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Offset.fromDirection(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : 1.0);
+            Offset(positionalArgs[0], positionalArgs[1]);
+      case 'Offset.fromDirection':
+        return ({positionalArgs, namedArgs, typeArgs}) => Offset.fromDirection(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 1.0);
       case 'Offset.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Offset.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => Offset.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'Offset.zero':
         return Offset.zero;
       case 'Offset.infinite':
         return Offset.infinite;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +36,7 @@ extension OffsetBinding on Offset {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Offset');
+        return const HTType('Offset');
       case 'dx':
         return dx;
       case 'dy':
@@ -52,13 +54,15 @@ extension OffsetBinding on Offset {
       case 'isFinite':
         return isFinite;
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0], positionalArgs[1]);
       case 'translate':
-        return ({positionalArgs, namedArgs, typeArgs}) => translate(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            translate(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -70,17 +74,23 @@ class SizeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Size':
-        return ({positionalArgs, namedArgs, typeArgs}) => Size(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Size(positionalArgs[0], positionalArgs[1]);
       case 'Size.copy':
-        return ({positionalArgs, namedArgs, typeArgs}) => Size.copy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Size.copy(positionalArgs[0]);
       case 'Size.square':
-        return ({positionalArgs, namedArgs, typeArgs}) => Size.square(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Size.square(positionalArgs[0]);
       case 'Size.fromWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => Size.fromWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Size.fromWidth(positionalArgs[0]);
       case 'Size.fromHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => Size.fromHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Size.fromHeight(positionalArgs[0]);
       case 'Size.fromRadius':
-        return ({positionalArgs, namedArgs, typeArgs}) => Size.fromRadius(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Size.fromRadius(positionalArgs[0]);
       case 'Size.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Size.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
@@ -89,7 +99,7 @@ class SizeAutoBinding extends HTExternalClass {
       case 'Size.infinite':
         return Size.infinite;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -103,7 +113,7 @@ extension SizeBinding on Size {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Size');
+        return const HTType('Size');
       case 'width':
         return width;
       case 'height':
@@ -125,29 +135,39 @@ extension SizeBinding on Size {
       case 'isFinite':
         return isFinite;
       case 'topLeft':
-        return ({positionalArgs, namedArgs, typeArgs}) => topLeft(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            topLeft(positionalArgs[0]);
       case 'topCenter':
-        return ({positionalArgs, namedArgs, typeArgs}) => topCenter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            topCenter(positionalArgs[0]);
       case 'topRight':
-        return ({positionalArgs, namedArgs, typeArgs}) => topRight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            topRight(positionalArgs[0]);
       case 'centerLeft':
-        return ({positionalArgs, namedArgs, typeArgs}) => centerLeft(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            centerLeft(positionalArgs[0]);
       case 'center':
-        return ({positionalArgs, namedArgs, typeArgs}) => center(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            center(positionalArgs[0]);
       case 'centerRight':
-        return ({positionalArgs, namedArgs, typeArgs}) => centerRight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            centerRight(positionalArgs[0]);
       case 'bottomLeft':
-        return ({positionalArgs, namedArgs, typeArgs}) => bottomLeft(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bottomLeft(positionalArgs[0]);
       case 'bottomCenter':
-        return ({positionalArgs, namedArgs, typeArgs}) => bottomCenter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bottomCenter(positionalArgs[0]);
       case 'bottomRight':
-        return ({positionalArgs, namedArgs, typeArgs}) => bottomRight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bottomRight(positionalArgs[0]);
       case 'contains':
-        return ({positionalArgs, namedArgs, typeArgs}) => contains(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            contains(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -159,19 +179,28 @@ class RectAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Rect.fromLTRB':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Rect.fromLTRB(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => Rect.fromLTRB(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'Rect.fromLTWH':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Rect.fromLTWH(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => Rect.fromLTWH(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'Rect.fromCircle':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Rect.fromCircle(center: namedArgs['center'], radius: namedArgs['radius']);
+        return ({positionalArgs, namedArgs, typeArgs}) => Rect.fromCircle(
+            center: namedArgs['center'], radius: namedArgs['radius']);
       case 'Rect.fromCenter':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Rect.fromCenter(center: namedArgs['center'], width: namedArgs['width'], height: namedArgs['height']);
+        return ({positionalArgs, namedArgs, typeArgs}) => Rect.fromCenter(
+            center: namedArgs['center'],
+            width: namedArgs['width'],
+            height: namedArgs['height']);
       case 'Rect.fromPoints':
-        return ({positionalArgs, namedArgs, typeArgs}) => Rect.fromPoints(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Rect.fromPoints(positionalArgs[0], positionalArgs[1]);
       case 'Rect.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Rect.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
@@ -180,7 +209,7 @@ class RectAutoBinding extends HTExternalClass {
       case 'Rect.largest':
         return Rect.largest;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -194,7 +223,7 @@ extension RectBinding on Rect {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Rect');
+        return const HTType('Rect');
       case 'left':
         return left;
       case 'top':
@@ -242,25 +271,33 @@ extension RectBinding on Rect {
       case 'hashCode':
         return hashCode;
       case 'shift':
-        return ({positionalArgs, namedArgs, typeArgs}) => shift(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shift(positionalArgs[0]);
       case 'translate':
-        return ({positionalArgs, namedArgs, typeArgs}) => translate(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            translate(positionalArgs[0], positionalArgs[1]);
       case 'inflate':
-        return ({positionalArgs, namedArgs, typeArgs}) => inflate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inflate(positionalArgs[0]);
       case 'deflate':
-        return ({positionalArgs, namedArgs, typeArgs}) => deflate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deflate(positionalArgs[0]);
       case 'intersect':
-        return ({positionalArgs, namedArgs, typeArgs}) => intersect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            intersect(positionalArgs[0]);
       case 'expandToInclude':
-        return ({positionalArgs, namedArgs, typeArgs}) => expandToInclude(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            expandToInclude(positionalArgs[0]);
       case 'overlaps':
-        return ({positionalArgs, namedArgs, typeArgs}) => overlaps(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            overlaps(positionalArgs[0]);
       case 'contains':
-        return ({positionalArgs, namedArgs, typeArgs}) => contains(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            contains(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -272,16 +309,18 @@ class RadiusAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Radius.circular':
-        return ({positionalArgs, namedArgs, typeArgs}) => Radius.circular(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Radius.circular(positionalArgs[0]);
       case 'Radius.elliptical':
-        return ({positionalArgs, namedArgs, typeArgs}) => Radius.elliptical(positionalArgs[0], positionalArgs[1]);
-      case 'Radius.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Radius.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            Radius.elliptical(positionalArgs[0], positionalArgs[1]);
+      case 'Radius.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => Radius.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'Radius.zero':
         return Radius.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -295,7 +334,7 @@ extension RadiusBinding on Radius {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Radius');
+        return const HTType('Radius');
       case 'x':
         return x;
       case 'y':
@@ -305,7 +344,7 @@ extension RadiusBinding on Radius {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -317,36 +356,64 @@ class RRectAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RRect.fromLTRBXY':
-        return ({positionalArgs, namedArgs, typeArgs}) => RRect.fromLTRBXY(positionalArgs[0], positionalArgs[1],
-            positionalArgs[2], positionalArgs[3], positionalArgs[4], positionalArgs[5]);
+        return ({positionalArgs, namedArgs, typeArgs}) => RRect.fromLTRBXY(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4],
+            positionalArgs[5]);
       case 'RRect.fromLTRBR':
         return ({positionalArgs, namedArgs, typeArgs}) => RRect.fromLTRBR(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       case 'RRect.fromRectXY':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RRect.fromRectXY(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => RRect.fromRectXY(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'RRect.fromRectAndRadius':
-        return ({positionalArgs, namedArgs, typeArgs}) => RRect.fromRectAndRadius(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RRect.fromRectAndRadius(positionalArgs[0], positionalArgs[1]);
       case 'RRect.fromLTRBAndCorners':
-        return ({positionalArgs, namedArgs, typeArgs}) => RRect.fromLTRBAndCorners(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3],
-            topLeft: namedArgs.containsKey('topLeft') ? namedArgs['topLeft'] : Radius.zero,
-            topRight: namedArgs.containsKey('topRight') ? namedArgs['topRight'] : Radius.zero,
-            bottomRight: namedArgs.containsKey('bottomRight') ? namedArgs['bottomRight'] : Radius.zero,
-            bottomLeft: namedArgs.containsKey('bottomLeft') ? namedArgs['bottomLeft'] : Radius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RRect.fromLTRBAndCorners(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3],
+                topLeft: namedArgs.containsKey('topLeft')
+                    ? namedArgs['topLeft']
+                    : Radius.zero,
+                topRight: namedArgs.containsKey('topRight')
+                    ? namedArgs['topRight']
+                    : Radius.zero,
+                bottomRight: namedArgs.containsKey('bottomRight')
+                    ? namedArgs['bottomRight']
+                    : Radius.zero,
+                bottomLeft: namedArgs.containsKey('bottomLeft')
+                    ? namedArgs['bottomLeft']
+                    : Radius.zero);
       case 'RRect.fromRectAndCorners':
-        return ({positionalArgs, namedArgs, typeArgs}) => RRect.fromRectAndCorners(positionalArgs[0],
-            topLeft: namedArgs.containsKey('topLeft') ? namedArgs['topLeft'] : Radius.zero,
-            topRight: namedArgs.containsKey('topRight') ? namedArgs['topRight'] : Radius.zero,
-            bottomRight: namedArgs.containsKey('bottomRight') ? namedArgs['bottomRight'] : Radius.zero,
-            bottomLeft: namedArgs.containsKey('bottomLeft') ? namedArgs['bottomLeft'] : Radius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RRect.fromRectAndCorners(positionalArgs[0],
+                topLeft: namedArgs.containsKey('topLeft')
+                    ? namedArgs['topLeft']
+                    : Radius.zero,
+                topRight: namedArgs.containsKey('topRight')
+                    ? namedArgs['topRight']
+                    : Radius.zero,
+                bottomRight: namedArgs.containsKey('bottomRight')
+                    ? namedArgs['bottomRight']
+                    : Radius.zero,
+                bottomLeft: namedArgs.containsKey('bottomLeft')
+                    ? namedArgs['bottomLeft']
+                    : Radius.zero);
       case 'RRect.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             RRect.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'RRect.zero':
         return RRect.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -360,7 +427,7 @@ extension RRectBinding on RRect {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RRect');
+        return const HTType('RRect');
       case 'left':
         return left;
       case 'top':
@@ -430,19 +497,23 @@ extension RRectBinding on RRect {
       case 'hashCode':
         return hashCode;
       case 'shift':
-        return ({positionalArgs, namedArgs, typeArgs}) => shift(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shift(positionalArgs[0]);
       case 'inflate':
-        return ({positionalArgs, namedArgs, typeArgs}) => inflate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inflate(positionalArgs[0]);
       case 'deflate':
-        return ({positionalArgs, namedArgs, typeArgs}) => deflate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deflate(positionalArgs[0]);
       case 'scaleRadii':
         return ({positionalArgs, namedArgs, typeArgs}) => scaleRadii();
       case 'contains':
-        return ({positionalArgs, namedArgs, typeArgs}) => contains(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            contains(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -454,18 +525,22 @@ class RSTransformAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RSTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RSTransform(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => RSTransform(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'RSTransform.fromComponents':
-        return ({positionalArgs, namedArgs, typeArgs}) => RSTransform.fromComponents(
-            rotation: namedArgs['rotation'],
-            scale: namedArgs['scale'],
-            anchorX: namedArgs['anchorX'],
-            anchorY: namedArgs['anchorY'],
-            translateX: namedArgs['translateX'],
-            translateY: namedArgs['translateY']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RSTransform.fromComponents(
+                rotation: namedArgs['rotation'],
+                scale: namedArgs['scale'],
+                anchorX: namedArgs['anchorX'],
+                anchorY: namedArgs['anchorY'],
+                translateX: namedArgs['translateX'],
+                translateY: namedArgs['translateY']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -479,7 +554,7 @@ extension RSTransformBinding on RSTransform {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RSTransform');
+        return const HTType('RSTransform');
       case 'scos':
         return scos;
       case 'ssin':
@@ -489,7 +564,7 @@ extension RSTransformBinding on RSTransform {
       case 'ty':
         return ty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/isolate_name_server.g.dart b/lib/bindings/dart/ui/isolate_name_server.g.dart
index 17352ec..6ce82e8 100644
--- a/lib/bindings/dart/ui/isolate_name_server.g.dart
+++ b/lib/bindings/dart/ui/isolate_name_server.g.dart
@@ -8,14 +8,17 @@ class IsolateNameServerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IsolateNameServer.lookupPortByName':
-        return ({positionalArgs, namedArgs, typeArgs}) => IsolateNameServer.lookupPortByName(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            IsolateNameServer.lookupPortByName(positionalArgs[0]);
       case 'IsolateNameServer.registerPortWithName':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            IsolateNameServer.registerPortWithName(positionalArgs[0], positionalArgs[1]);
+            IsolateNameServer.registerPortWithName(
+                positionalArgs[0], positionalArgs[1]);
       case 'IsolateNameServer.removePortNameMapping':
-        return ({positionalArgs, namedArgs, typeArgs}) => IsolateNameServer.removePortNameMapping(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            IsolateNameServer.removePortNameMapping(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/painting.g.dart b/lib/bindings/dart/ui/painting.g.dart
index 9f4d80c..5ab05d5 100644
--- a/lib/bindings/dart/ui/painting.g.dart
+++ b/lib/bindings/dart/ui/painting.g.dart
@@ -68,7 +68,7 @@ class BlendModeAutoBinding extends HTExternalClass {
       case 'BlendMode.luminosity':
         return BlendMode.luminosity;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -76,13 +76,14 @@ class BlendModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BlendMode');
+        return const HTType('BlendMode');
       case 'index':
         return (instance as BlendMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BlendMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BlendMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -104,7 +105,7 @@ class FilterQualityAutoBinding extends HTExternalClass {
       case 'FilterQuality.high':
         return FilterQuality.high;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -112,13 +113,14 @@ class FilterQualityAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FilterQuality');
+        return const HTType('FilterQuality');
       case 'index':
         return (instance as FilterQuality).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FilterQuality).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FilterQuality).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -138,7 +140,7 @@ class StrokeCapAutoBinding extends HTExternalClass {
       case 'StrokeCap.square':
         return StrokeCap.square;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -146,13 +148,14 @@ class StrokeCapAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StrokeCap');
+        return const HTType('StrokeCap');
       case 'index':
         return (instance as StrokeCap).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as StrokeCap).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as StrokeCap).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -172,7 +175,7 @@ class StrokeJoinAutoBinding extends HTExternalClass {
       case 'StrokeJoin.bevel':
         return StrokeJoin.bevel;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -180,13 +183,14 @@ class StrokeJoinAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StrokeJoin');
+        return const HTType('StrokeJoin');
       case 'index':
         return (instance as StrokeJoin).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as StrokeJoin).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as StrokeJoin).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -204,7 +208,7 @@ class PaintingStyleAutoBinding extends HTExternalClass {
       case 'PaintingStyle.stroke':
         return PaintingStyle.stroke;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -212,13 +216,14 @@ class PaintingStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PaintingStyle');
+        return const HTType('PaintingStyle');
       case 'index':
         return (instance as PaintingStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PaintingStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PaintingStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -240,7 +245,7 @@ class ClipAutoBinding extends HTExternalClass {
       case 'Clip.antiAliasWithSaveLayer':
         return Clip.antiAliasWithSaveLayer;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -248,13 +253,14 @@ class ClipAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Clip');
+        return const HTType('Clip');
       case 'index':
         return (instance as Clip).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as Clip).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as Clip).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -274,7 +280,7 @@ class ImageByteFormatAutoBinding extends HTExternalClass {
       case 'ImageByteFormat.png':
         return ImageByteFormat.png;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -282,13 +288,14 @@ class ImageByteFormatAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageByteFormat');
+        return const HTType('ImageByteFormat');
       case 'index':
         return (instance as ImageByteFormat).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ImageByteFormat).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ImageByteFormat).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -306,7 +313,7 @@ class PixelFormatAutoBinding extends HTExternalClass {
       case 'PixelFormat.bgra8888':
         return PixelFormat.bgra8888;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -314,13 +321,14 @@ class PixelFormatAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PixelFormat');
+        return const HTType('PixelFormat');
       case 'index':
         return (instance as PixelFormat).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PixelFormat).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PixelFormat).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -338,7 +346,7 @@ class PathFillTypeAutoBinding extends HTExternalClass {
       case 'PathFillType.evenOdd':
         return PathFillType.evenOdd;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -346,13 +354,14 @@ class PathFillTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PathFillType');
+        return const HTType('PathFillType');
       case 'index':
         return (instance as PathFillType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PathFillType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PathFillType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -376,7 +385,7 @@ class PathOperationAutoBinding extends HTExternalClass {
       case 'PathOperation.reverseDifference':
         return PathOperation.reverseDifference;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -384,13 +393,14 @@ class PathOperationAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PathOperation');
+        return const HTType('PathOperation');
       case 'index':
         return (instance as PathOperation).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PathOperation).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PathOperation).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -412,7 +422,7 @@ class BlurStyleAutoBinding extends HTExternalClass {
       case 'BlurStyle.inner':
         return BlurStyle.inner;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -420,13 +430,14 @@ class BlurStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BlurStyle');
+        return const HTType('BlurStyle');
       case 'index':
         return (instance as BlurStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BlurStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BlurStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -448,7 +459,7 @@ class TileModeAutoBinding extends HTExternalClass {
       case 'TileMode.decal':
         return TileMode.decal;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -456,13 +467,14 @@ class TileModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TileMode');
+        return const HTType('TileMode');
       case 'index':
         return (instance as TileMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TileMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TileMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -482,7 +494,7 @@ class VertexModeAutoBinding extends HTExternalClass {
       case 'VertexMode.triangleFan':
         return VertexMode.triangleFan;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -490,13 +502,14 @@ class VertexModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VertexMode');
+        return const HTType('VertexMode');
       case 'index':
         return (instance as VertexMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as VertexMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as VertexMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -516,7 +529,7 @@ class PointModeAutoBinding extends HTExternalClass {
       case 'PointMode.polygon':
         return PointMode.polygon;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -524,13 +537,14 @@ class PointModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointMode');
+        return const HTType('PointMode');
       case 'index':
         return (instance as PointMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PointMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PointMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -548,7 +562,7 @@ class ClipOpAutoBinding extends HTExternalClass {
       case 'ClipOp.intersect':
         return ClipOp.intersect;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -556,13 +570,14 @@ class ClipOpAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipOp');
+        return const HTType('ClipOp');
       case 'index':
         return (instance as ClipOp).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ClipOp).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ClipOp).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -574,22 +589,31 @@ class ColorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Color':
-        return ({positionalArgs, namedArgs, typeArgs}) => Color(positionalArgs[0]);
-      case 'Color.fromARGB':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Color.fromARGB(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            Color(positionalArgs[0]);
+      case 'Color.fromARGB':
+        return ({positionalArgs, namedArgs, typeArgs}) => Color.fromARGB(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'Color.fromRGBO':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Color.fromRGBO(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => Color.fromRGBO(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'Color.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Color.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'Color.alphaBlend':
-        return ({positionalArgs, namedArgs, typeArgs}) => Color.alphaBlend(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Color.alphaBlend(positionalArgs[0], positionalArgs[1]);
       case 'Color.getAlphaFromOpacity':
-        return ({positionalArgs, namedArgs, typeArgs}) => Color.getAlphaFromOpacity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Color.getAlphaFromOpacity(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -603,7 +627,7 @@ extension ColorBinding on Color {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Color');
+        return const HTType('Color');
       case 'value':
         return value;
       case 'alpha':
@@ -619,21 +643,26 @@ extension ColorBinding on Color {
       case 'hashCode':
         return hashCode;
       case 'withAlpha':
-        return ({positionalArgs, namedArgs, typeArgs}) => withAlpha(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withAlpha(positionalArgs[0]);
       case 'withOpacity':
-        return ({positionalArgs, namedArgs, typeArgs}) => withOpacity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withOpacity(positionalArgs[0]);
       case 'withRed':
-        return ({positionalArgs, namedArgs, typeArgs}) => withRed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withRed(positionalArgs[0]);
       case 'withGreen':
-        return ({positionalArgs, namedArgs, typeArgs}) => withGreen(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withGreen(positionalArgs[0]);
       case 'withBlue':
-        return ({positionalArgs, namedArgs, typeArgs}) => withBlue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withBlue(positionalArgs[0]);
       case 'computeLuminance':
         return ({positionalArgs, namedArgs, typeArgs}) => computeLuminance();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -649,17 +678,18 @@ class PaintAutoBinding extends HTExternalClass {
       case 'Paint.enableDithering':
         return Paint.enableDithering;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Paint.enableDithering':
         return Paint.enableDithering = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -678,7 +708,7 @@ extension PaintBinding on Paint {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Paint');
+        return const HTType('Paint');
       case 'isAntiAlias':
         return isAntiAlias;
       case 'color':
@@ -710,7 +740,7 @@ extension PaintBinding on Paint {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -759,7 +789,7 @@ extension PaintBinding on Paint {
         invertColors = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -773,12 +803,13 @@ class PathAutoBinding extends HTExternalClass {
       case 'Path':
         return ({positionalArgs, namedArgs, typeArgs}) => Path();
       case 'Path.from':
-        return ({positionalArgs, namedArgs, typeArgs}) => Path.from(positionalArgs[0]);
-      case 'Path.combine':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Path.combine(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            Path.from(positionalArgs[0]);
+      case 'Path.combine':
+        return ({positionalArgs, namedArgs, typeArgs}) => Path.combine(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -797,54 +828,101 @@ extension PathBinding on Path {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Path');
+        return const HTType('Path');
       case 'fillType':
         return fillType;
       case 'moveTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => moveTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            moveTo(positionalArgs[0], positionalArgs[1]);
       case 'relativeMoveTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => relativeMoveTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            relativeMoveTo(positionalArgs[0], positionalArgs[1]);
       case 'lineTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lineTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lineTo(positionalArgs[0], positionalArgs[1]);
       case 'relativeLineTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => relativeLineTo(positionalArgs[0], positionalArgs[1]);
-      case 'quadraticBezierTo':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            quadraticBezierTo(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            relativeLineTo(positionalArgs[0], positionalArgs[1]);
+      case 'quadraticBezierTo':
+        return ({positionalArgs, namedArgs, typeArgs}) => quadraticBezierTo(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'relativeQuadraticBezierTo':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            relativeQuadraticBezierTo(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            relativeQuadraticBezierTo(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3]);
       case 'cubicTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => cubicTo(positionalArgs[0], positionalArgs[1],
-            positionalArgs[2], positionalArgs[3], positionalArgs[4], positionalArgs[5]);
+        return ({positionalArgs, namedArgs, typeArgs}) => cubicTo(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4],
+            positionalArgs[5]);
       case 'relativeCubicTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => relativeCubicTo(positionalArgs[0], positionalArgs[1],
-            positionalArgs[2], positionalArgs[3], positionalArgs[4], positionalArgs[5]);
+        return ({positionalArgs, namedArgs, typeArgs}) => relativeCubicTo(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4],
+            positionalArgs[5]);
       case 'conicTo':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            conicTo(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) => conicTo(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       case 'relativeConicTo':
         return ({positionalArgs, namedArgs, typeArgs}) => relativeConicTo(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       case 'arcTo':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            arcTo(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => arcTo(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'arcToPoint':
-        return ({positionalArgs, namedArgs, typeArgs}) => arcToPoint(positionalArgs[0],
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : Radius.zero,
-            rotation: namedArgs.containsKey('rotation') ? namedArgs['rotation'] : 0.0,
-            largeArc: namedArgs.containsKey('largeArc') ? namedArgs['largeArc'] : false,
-            clockwise: namedArgs.containsKey('clockwise') ? namedArgs['clockwise'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => arcToPoint(
+            positionalArgs[0],
+            radius: namedArgs.containsKey('radius')
+                ? namedArgs['radius']
+                : Radius.zero,
+            rotation:
+                namedArgs.containsKey('rotation') ? namedArgs['rotation'] : 0.0,
+            largeArc: namedArgs.containsKey('largeArc')
+                ? namedArgs['largeArc']
+                : false,
+            clockwise: namedArgs.containsKey('clockwise')
+                ? namedArgs['clockwise']
+                : true);
       case 'relativeArcToPoint':
-        return ({positionalArgs, namedArgs, typeArgs}) => relativeArcToPoint(positionalArgs[0],
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : Radius.zero,
-            rotation: namedArgs.containsKey('rotation') ? namedArgs['rotation'] : 0.0,
-            largeArc: namedArgs.containsKey('largeArc') ? namedArgs['largeArc'] : false,
-            clockwise: namedArgs.containsKey('clockwise') ? namedArgs['clockwise'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => relativeArcToPoint(
+            positionalArgs[0],
+            radius: namedArgs.containsKey('radius')
+                ? namedArgs['radius']
+                : Radius.zero,
+            rotation:
+                namedArgs.containsKey('rotation') ? namedArgs['rotation'] : 0.0,
+            largeArc: namedArgs.containsKey('largeArc')
+                ? namedArgs['largeArc']
+                : false,
+            clockwise: namedArgs.containsKey('clockwise')
+                ? namedArgs['clockwise']
+                : true);
       case 'addRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => addRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addRect(positionalArgs[0]);
       case 'addOval':
-        return ({positionalArgs, namedArgs, typeArgs}) => addOval(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addOval(positionalArgs[0]);
       case 'addArc':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             addArc(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
@@ -852,30 +930,40 @@ extension PathBinding on Path {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             addPolygon(List<Offset>.from(positionalArgs[0]), positionalArgs[1]);
       case 'addRRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => addRRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addRRect(positionalArgs[0]);
       case 'addPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPath(positionalArgs[0], positionalArgs[1],
-            matrix4: namedArgs.containsKey('matrix4') ? namedArgs['matrix4'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => addPath(
+            positionalArgs[0], positionalArgs[1],
+            matrix4:
+                namedArgs.containsKey('matrix4') ? namedArgs['matrix4'] : null);
       case 'extendWithPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => extendWithPath(positionalArgs[0], positionalArgs[1],
-            matrix4: namedArgs.containsKey('matrix4') ? namedArgs['matrix4'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => extendWithPath(
+            positionalArgs[0], positionalArgs[1],
+            matrix4:
+                namedArgs.containsKey('matrix4') ? namedArgs['matrix4'] : null);
       case 'close':
         return ({positionalArgs, namedArgs, typeArgs}) => close();
       case 'reset':
         return ({positionalArgs, namedArgs, typeArgs}) => reset();
       case 'contains':
-        return ({positionalArgs, namedArgs, typeArgs}) => contains(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            contains(positionalArgs[0]);
       case 'shift':
-        return ({positionalArgs, namedArgs, typeArgs}) => shift(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shift(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'getBounds':
         return ({positionalArgs, namedArgs, typeArgs}) => getBounds();
       case 'computeMetrics':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            computeMetrics(forceClosed: namedArgs.containsKey('forceClosed') ? namedArgs['forceClosed'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => computeMetrics(
+            forceClosed: namedArgs.containsKey('forceClosed')
+                ? namedArgs['forceClosed']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -885,7 +973,7 @@ extension PathBinding on Path {
         fillType = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -897,11 +985,13 @@ class TangentAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Tangent':
-        return ({positionalArgs, namedArgs, typeArgs}) => Tangent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Tangent(positionalArgs[0], positionalArgs[1]);
       case 'Tangent.fromAngle':
-        return ({positionalArgs, namedArgs, typeArgs}) => Tangent.fromAngle(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Tangent.fromAngle(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -915,7 +1005,7 @@ extension TangentBinding on Tangent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Tangent');
+        return const HTType('Tangent');
       case 'position':
         return position;
       case 'vector':
@@ -923,7 +1013,7 @@ extension TangentBinding on Tangent {
       case 'angle':
         return angle;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -935,9 +1025,10 @@ class MaskFilterAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaskFilter.blur':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaskFilter.blur(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaskFilter.blur(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -951,13 +1042,13 @@ extension MaskFilterBinding on MaskFilter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaskFilter');
+        return const HTType('MaskFilter');
       case 'hashCode':
         return hashCode;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -969,15 +1060,19 @@ class ColorFilterAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ColorFilter.mode':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorFilter.mode(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ColorFilter.mode(positionalArgs[0], positionalArgs[1]);
       case 'ColorFilter.matrix':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorFilter.matrix(List<double>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ColorFilter.matrix(List<double>.from(positionalArgs[0]));
       case 'ColorFilter.linearToSrgbGamma':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorFilter.linearToSrgbGamma();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ColorFilter.linearToSrgbGamma();
       case 'ColorFilter.srgbToLinearGamma':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorFilter.srgbToLinearGamma();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ColorFilter.srgbToLinearGamma();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -991,13 +1086,13 @@ extension ColorFilterBinding on ColorFilter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ColorFilter');
+        return const HTType('ColorFilter');
       case 'hashCode':
         return hashCode;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1012,15 +1107,20 @@ class ImageFilterAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ImageFilter.blur(
             sigmaX: namedArgs.containsKey('sigmaX') ? namedArgs['sigmaX'] : 0.0,
             sigmaY: namedArgs.containsKey('sigmaY') ? namedArgs['sigmaY'] : 0.0,
-            tileMode: namedArgs.containsKey('tileMode') ? namedArgs['tileMode'] : TileMode.clamp);
+            tileMode: namedArgs.containsKey('tileMode')
+                ? namedArgs['tileMode']
+                : TileMode.clamp);
       case 'ImageFilter.matrix':
-        return ({positionalArgs, namedArgs, typeArgs}) => ImageFilter.matrix(positionalArgs[0],
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low);
+        return ({positionalArgs, namedArgs, typeArgs}) => ImageFilter.matrix(
+            positionalArgs[0],
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low);
       case 'ImageFilter.compose':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ImageFilter.compose(outer: namedArgs['outer'], inner: namedArgs['inner']);
+        return ({positionalArgs, namedArgs, typeArgs}) => ImageFilter.compose(
+            outer: namedArgs['outer'], inner: namedArgs['inner']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1034,10 +1134,13 @@ class ImageShaderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ImageShader':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ImageShader(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => ImageShader(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1053,17 +1156,27 @@ class VerticesAutoBinding extends HTExternalClass {
       case 'Vertices':
         return ({positionalArgs, namedArgs, typeArgs}) => Vertices(
             positionalArgs[0], List<Offset>.from(positionalArgs[1]),
-            textureCoordinates:
-                namedArgs.containsKey('textureCoordinates') ? List<Offset>.from(namedArgs['textureCoordinates']) : null,
-            colors: namedArgs.containsKey('colors') ? List<Color>.from(namedArgs['colors']) : null,
-            indices: namedArgs.containsKey('indices') ? List<int>.from(namedArgs['indices']) : null);
+            textureCoordinates: namedArgs.containsKey('textureCoordinates')
+                ? List<Offset>.from(namedArgs['textureCoordinates'])
+                : null,
+            colors: namedArgs.containsKey('colors')
+                ? List<Color>.from(namedArgs['colors'])
+                : null,
+            indices: namedArgs.containsKey('indices')
+                ? List<int>.from(namedArgs['indices'])
+                : null);
       case 'Vertices.raw':
-        return ({positionalArgs, namedArgs, typeArgs}) => Vertices.raw(positionalArgs[0], positionalArgs[1],
-            textureCoordinates: namedArgs.containsKey('textureCoordinates') ? namedArgs['textureCoordinates'] : null,
-            colors: namedArgs.containsKey('colors') ? namedArgs['colors'] : null,
-            indices: namedArgs.containsKey('indices') ? namedArgs['indices'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Vertices.raw(
+            positionalArgs[0], positionalArgs[1],
+            textureCoordinates: namedArgs.containsKey('textureCoordinates')
+                ? namedArgs['textureCoordinates']
+                : null,
+            colors:
+                namedArgs.containsKey('colors') ? namedArgs['colors'] : null,
+            indices:
+                namedArgs.containsKey('indices') ? namedArgs['indices'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1077,10 +1190,11 @@ class CanvasAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Canvas':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Canvas(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Canvas(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1094,82 +1208,119 @@ extension CanvasBinding on Canvas {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Canvas');
+        return const HTType('Canvas');
       case 'save':
         return ({positionalArgs, namedArgs, typeArgs}) => save();
       case 'saveLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => saveLayer(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            saveLayer(positionalArgs[0], positionalArgs[1]);
       case 'restore':
         return ({positionalArgs, namedArgs, typeArgs}) => restore();
       case 'getSaveCount':
         return ({positionalArgs, namedArgs, typeArgs}) => getSaveCount();
       case 'translate':
-        return ({positionalArgs, namedArgs, typeArgs}) => translate(positionalArgs[0], positionalArgs[1]);
-      case 'scale':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            scale(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+            translate(positionalArgs[0], positionalArgs[1]);
+      case 'scale':
+        return ({positionalArgs, namedArgs, typeArgs}) => scale(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'rotate':
-        return ({positionalArgs, namedArgs, typeArgs}) => rotate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rotate(positionalArgs[0]);
       case 'skew':
-        return ({positionalArgs, namedArgs, typeArgs}) => skew(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            skew(positionalArgs[0], positionalArgs[1]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'clipRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => clipRect(positionalArgs[0],
-            clipOp: namedArgs.containsKey('clipOp') ? namedArgs['clipOp'] : ClipOp.intersect,
-            doAntiAlias: namedArgs.containsKey('doAntiAlias') ? namedArgs['doAntiAlias'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => clipRect(
+            positionalArgs[0],
+            clipOp: namedArgs.containsKey('clipOp')
+                ? namedArgs['clipOp']
+                : ClipOp.intersect,
+            doAntiAlias: namedArgs.containsKey('doAntiAlias')
+                ? namedArgs['doAntiAlias']
+                : true);
       case 'clipRRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => clipRRect(positionalArgs[0],
-            doAntiAlias: namedArgs.containsKey('doAntiAlias') ? namedArgs['doAntiAlias'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => clipRRect(
+            positionalArgs[0],
+            doAntiAlias: namedArgs.containsKey('doAntiAlias')
+                ? namedArgs['doAntiAlias']
+                : true);
       case 'clipPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => clipPath(positionalArgs[0],
-            doAntiAlias: namedArgs.containsKey('doAntiAlias') ? namedArgs['doAntiAlias'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => clipPath(
+            positionalArgs[0],
+            doAntiAlias: namedArgs.containsKey('doAntiAlias')
+                ? namedArgs['doAntiAlias']
+                : true);
       case 'drawColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawColor(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drawColor(positionalArgs[0], positionalArgs[1]);
       case 'drawLine':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             drawLine(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'drawPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drawPaint(positionalArgs[0]);
       case 'drawRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawRect(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drawRect(positionalArgs[0], positionalArgs[1]);
       case 'drawRRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawRRect(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drawRRect(positionalArgs[0], positionalArgs[1]);
       case 'drawDRRect':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             drawDRRect(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'drawOval':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawOval(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drawOval(positionalArgs[0], positionalArgs[1]);
       case 'drawCircle':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             drawCircle(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'drawArc':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            drawArc(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) => drawArc(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       case 'drawPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawPath(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drawPath(positionalArgs[0], positionalArgs[1]);
       case 'drawImage':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             drawImage(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'drawImageRect':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            drawImageRect(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => drawImageRect(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'drawImageNine':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            drawImageNine(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => drawImageNine(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'drawPicture':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawPicture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drawPicture(positionalArgs[0]);
       case 'drawParagraph':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawParagraph(positionalArgs[0], positionalArgs[1]);
-      case 'drawPoints':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            drawPoints(positionalArgs[0], List<Offset>.from(positionalArgs[1]), positionalArgs[2]);
+            drawParagraph(positionalArgs[0], positionalArgs[1]);
+      case 'drawPoints':
+        return ({positionalArgs, namedArgs, typeArgs}) => drawPoints(
+            positionalArgs[0],
+            List<Offset>.from(positionalArgs[1]),
+            positionalArgs[2]);
       case 'drawRawPoints':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            drawRawPoints(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => drawRawPoints(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'drawVertices':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            drawVertices(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => drawVertices(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'drawAtlas':
         return ({positionalArgs, namedArgs, typeArgs}) => drawAtlas(
             positionalArgs[0],
@@ -1180,13 +1331,22 @@ extension CanvasBinding on Canvas {
             positionalArgs[5],
             positionalArgs[6]);
       case 'drawRawAtlas':
-        return ({positionalArgs, namedArgs, typeArgs}) => drawRawAtlas(positionalArgs[0], positionalArgs[1],
-            positionalArgs[2], positionalArgs[3], positionalArgs[4], positionalArgs[5], positionalArgs[6]);
+        return ({positionalArgs, namedArgs, typeArgs}) => drawRawAtlas(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4],
+            positionalArgs[5],
+            positionalArgs[6]);
       case 'drawShadow':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            drawShadow(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => drawShadow(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1200,7 +1360,7 @@ class PictureRecorderAutoBinding extends HTExternalClass {
       case 'PictureRecorder':
         return ({positionalArgs, namedArgs, typeArgs}) => PictureRecorder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1214,13 +1374,13 @@ extension PictureRecorderBinding on PictureRecorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PictureRecorder');
+        return const HTType('PictureRecorder');
       case 'isRecording':
         return isRecording;
       case 'endRecording':
         return ({positionalArgs, namedArgs, typeArgs}) => endRecording();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1233,19 +1393,28 @@ class ShadowAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'Shadow':
         return ({positionalArgs, namedArgs, typeArgs}) => Shadow(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : const Color(_kColorDefault),
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            blurRadius: namedArgs.containsKey('blurRadius') ? namedArgs['blurRadius'] : 0.0);
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : const Color(_kColorDefault),
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            blurRadius: namedArgs.containsKey('blurRadius')
+                ? namedArgs['blurRadius']
+                : 0.0);
       case 'Shadow.convertRadiusToSigma':
-        return ({positionalArgs, namedArgs, typeArgs}) => Shadow.convertRadiusToSigma(positionalArgs[0]);
-      case 'Shadow.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Shadow.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            Shadow.convertRadiusToSigma(positionalArgs[0]);
+      case 'Shadow.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => Shadow.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'Shadow.lerpList':
         return ({positionalArgs, namedArgs, typeArgs}) => Shadow.lerpList(
-            List<Shadow>.from(positionalArgs[0]), List<Shadow>.from(positionalArgs[1]), positionalArgs[2]);
+            List<Shadow>.from(positionalArgs[0]),
+            List<Shadow>.from(positionalArgs[1]),
+            positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1261,7 +1430,7 @@ extension ShadowBinding on Shadow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Shadow');
+        return const HTType('Shadow');
       case 'color':
         return color;
       case 'offset':
@@ -1275,11 +1444,12 @@ extension ShadowBinding on Shadow {
       case 'toPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => toPaint();
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1291,9 +1461,10 @@ class ImmutableBufferAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ImmutableBuffer.fromUint8List':
-        return ({positionalArgs, namedArgs, typeArgs}) => ImmutableBuffer.fromUint8List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ImmutableBuffer.fromUint8List(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1305,15 +1476,19 @@ class ImageDescriptorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ImageDescriptor.raw':
-        return ({positionalArgs, namedArgs, typeArgs}) => ImageDescriptor.raw(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => ImageDescriptor.raw(
+            positionalArgs[0],
             width: namedArgs['width'],
             height: namedArgs['height'],
-            rowBytes: namedArgs.containsKey('rowBytes') ? namedArgs['rowBytes'] : null,
+            rowBytes: namedArgs.containsKey('rowBytes')
+                ? namedArgs['rowBytes']
+                : null,
             pixelFormat: namedArgs['pixelFormat']);
       case 'ImageDescriptor.encoded':
-        return ({positionalArgs, namedArgs, typeArgs}) => ImageDescriptor.encoded(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ImageDescriptor.encoded(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1327,7 +1502,7 @@ extension ImageDescriptorBinding on ImageDescriptor {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageDescriptor');
+        return const HTType('ImageDescriptor');
       case 'width':
         return width;
       case 'height':
@@ -1338,10 +1513,14 @@ extension ImageDescriptorBinding on ImageDescriptor {
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'instantiateCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => instantiateCodec(
-            targetWidth: namedArgs.containsKey('targetWidth') ? namedArgs['targetWidth'] : null,
-            targetHeight: namedArgs.containsKey('targetHeight') ? namedArgs['targetHeight'] : null);
+            targetWidth: namedArgs.containsKey('targetWidth')
+                ? namedArgs['targetWidth']
+                : null,
+            targetHeight: namedArgs.containsKey('targetHeight')
+                ? namedArgs['targetHeight']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/platform_dispatcher.g.dart b/lib/bindings/dart/ui/platform_dispatcher.g.dart
index 540cbb6..d6e6abc 100644
--- a/lib/bindings/dart/ui/platform_dispatcher.g.dart
+++ b/lib/bindings/dart/ui/platform_dispatcher.g.dart
@@ -20,7 +20,7 @@ class FramePhaseAutoBinding extends HTExternalClass {
       case 'FramePhase.rasterFinish':
         return FramePhase.rasterFinish;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,13 +28,14 @@ class FramePhaseAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FramePhase');
+        return const HTType('FramePhase');
       case 'index':
         return (instance as FramePhase).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FramePhase).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FramePhase).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -56,7 +57,7 @@ class AppLifecycleStateAutoBinding extends HTExternalClass {
       case 'AppLifecycleState.detached':
         return AppLifecycleState.detached;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -64,13 +65,14 @@ class AppLifecycleStateAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AppLifecycleState');
+        return const HTType('AppLifecycleState');
       case 'index':
         return (instance as AppLifecycleState).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as AppLifecycleState).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as AppLifecycleState).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -84,7 +86,7 @@ class PlatformDispatcherAutoBinding extends HTExternalClass {
       case 'PlatformDispatcher.instance':
         return PlatformDispatcher.instance;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -103,7 +105,7 @@ class FrameTimingAutoBinding extends HTExternalClass {
             rasterStart: namedArgs['rasterStart'],
             rasterFinish: namedArgs['rasterFinish']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -117,7 +119,7 @@ extension FrameTimingBinding on FrameTiming {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FrameTiming');
+        return const HTType('FrameTiming');
       case 'buildDuration':
         return buildDuration;
       case 'rasterDuration':
@@ -127,11 +129,12 @@ extension FrameTimingBinding on FrameTiming {
       case 'totalSpan':
         return totalSpan;
       case 'timestampInMicroseconds':
-        return ({positionalArgs, namedArgs, typeArgs}) => timestampInMicroseconds(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timestampInMicroseconds(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -145,7 +148,7 @@ class WindowPaddingAutoBinding extends HTExternalClass {
       case 'WindowPadding.zero':
         return WindowPadding.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -157,15 +160,22 @@ class LocaleAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Locale':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Locale(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Locale(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'Locale.fromSubtags':
         return ({positionalArgs, namedArgs, typeArgs}) => Locale.fromSubtags(
-            languageCode: namedArgs.containsKey('languageCode') ? namedArgs['languageCode'] : 'und',
-            scriptCode: namedArgs.containsKey('scriptCode') ? namedArgs['scriptCode'] : null,
-            countryCode: namedArgs.containsKey('countryCode') ? namedArgs['countryCode'] : null);
+            languageCode: namedArgs.containsKey('languageCode')
+                ? namedArgs['languageCode']
+                : 'und',
+            scriptCode: namedArgs.containsKey('scriptCode')
+                ? namedArgs['scriptCode']
+                : null,
+            countryCode: namedArgs.containsKey('countryCode')
+                ? namedArgs['countryCode']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -179,7 +189,7 @@ extension LocaleBinding on Locale {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Locale');
+        return const HTType('Locale');
       case 'scriptCode':
         return scriptCode;
       case 'languageCode':
@@ -193,7 +203,7 @@ extension LocaleBinding on Locale {
       case 'toLanguageTag':
         return ({positionalArgs, namedArgs, typeArgs}) => toLanguageTag();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/plugins.g.dart b/lib/bindings/dart/ui/plugins.g.dart
index c2909bd..3b512aa 100644
--- a/lib/bindings/dart/ui/plugins.g.dart
+++ b/lib/bindings/dart/ui/plugins.g.dart
@@ -8,9 +8,10 @@ class CallbackHandleAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CallbackHandle.fromRawHandle':
-        return ({positionalArgs, namedArgs, typeArgs}) => CallbackHandle.fromRawHandle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CallbackHandle.fromRawHandle(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +25,13 @@ extension CallbackHandleBinding on CallbackHandle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CallbackHandle');
+        return const HTType('CallbackHandle');
       case 'hashCode':
         return hashCode;
       case 'toRawHandle':
         return ({positionalArgs, namedArgs, typeArgs}) => toRawHandle();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,11 +43,13 @@ class PluginUtilitiesAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PluginUtilities.getCallbackHandle':
-        return ({positionalArgs, namedArgs, typeArgs}) => PluginUtilities.getCallbackHandle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PluginUtilities.getCallbackHandle(positionalArgs[0]);
       case 'PluginUtilities.getCallbackFromHandle':
-        return ({positionalArgs, namedArgs, typeArgs}) => PluginUtilities.getCallbackFromHandle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PluginUtilities.getCallbackFromHandle(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/pointer.g.dart b/lib/bindings/dart/ui/pointer.g.dart
index 8ad178f..417b4f3 100644
--- a/lib/bindings/dart/ui/pointer.g.dart
+++ b/lib/bindings/dart/ui/pointer.g.dart
@@ -24,7 +24,7 @@ class PointerChangeAutoBinding extends HTExternalClass {
       case 'PointerChange.up':
         return PointerChange.up;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,13 +32,14 @@ class PointerChangeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerChange');
+        return const HTType('PointerChange');
       case 'index':
         return (instance as PointerChange).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PointerChange).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PointerChange).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -62,7 +63,7 @@ class PointerDeviceKindAutoBinding extends HTExternalClass {
       case 'PointerDeviceKind.unknown':
         return PointerDeviceKind.unknown;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -70,13 +71,14 @@ class PointerDeviceKindAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerDeviceKind');
+        return const HTType('PointerDeviceKind');
       case 'index':
         return (instance as PointerDeviceKind).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PointerDeviceKind).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PointerDeviceKind).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -96,7 +98,7 @@ class PointerSignalKindAutoBinding extends HTExternalClass {
       case 'PointerSignalKind.unknown':
         return PointerSignalKind.unknown;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -104,13 +106,14 @@ class PointerSignalKindAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerSignalKind');
+        return const HTType('PointerSignalKind');
       case 'index':
         return (instance as PointerSignalKind).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PointerSignalKind).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PointerSignalKind).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -123,37 +126,86 @@ class PointerDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerData':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerData(
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0,
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            change: namedArgs.containsKey('change') ? namedArgs['change'] : PointerChange.cancel,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
-            signalKind: namedArgs.containsKey('signalKind') ? namedArgs['signalKind'] : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            change: namedArgs.containsKey('change')
+                ? namedArgs['change']
+                : PointerChange.cancel,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
+            signalKind: namedArgs.containsKey('signalKind')
+                ? namedArgs['signalKind']
+                : null,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            pointerIdentifier: namedArgs.containsKey('pointerIdentifier') ? namedArgs['pointerIdentifier'] : 0,
-            physicalX: namedArgs.containsKey('physicalX') ? namedArgs['physicalX'] : 0.0,
-            physicalY: namedArgs.containsKey('physicalY') ? namedArgs['physicalY'] : 0.0,
-            physicalDeltaX: namedArgs.containsKey('physicalDeltaX') ? namedArgs['physicalDeltaX'] : 0.0,
-            physicalDeltaY: namedArgs.containsKey('physicalDeltaY') ? namedArgs['physicalDeltaY'] : 0.0,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : false,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 0.0,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 0.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 0.0,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            pointerIdentifier: namedArgs.containsKey('pointerIdentifier')
+                ? namedArgs['pointerIdentifier']
+                : 0,
+            physicalX: namedArgs.containsKey('physicalX')
+                ? namedArgs['physicalX']
+                : 0.0,
+            physicalY: namedArgs.containsKey('physicalY')
+                ? namedArgs['physicalY']
+                : 0.0,
+            physicalDeltaX: namedArgs.containsKey('physicalDeltaX')
+                ? namedArgs['physicalDeltaX']
+                : 0.0,
+            physicalDeltaY: namedArgs.containsKey('physicalDeltaY')
+                ? namedArgs['physicalDeltaY']
+                : 0.0,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : false,
+            pressure:
+                namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 0.0,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 0.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 0.0,
+            distance:
+                namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
-            platformData: namedArgs.containsKey('platformData') ? namedArgs['platformData'] : 0,
-            scrollDeltaX: namedArgs.containsKey('scrollDeltaX') ? namedArgs['scrollDeltaX'] : 0.0,
-            scrollDeltaY: namedArgs.containsKey('scrollDeltaY') ? namedArgs['scrollDeltaY'] : 0.0);
+            platformData: namedArgs.containsKey('platformData')
+                ? namedArgs['platformData']
+                : 0,
+            scrollDeltaX: namedArgs.containsKey('scrollDeltaX')
+                ? namedArgs['scrollDeltaX']
+                : 0.0,
+            scrollDeltaY: namedArgs.containsKey('scrollDeltaY')
+                ? namedArgs['scrollDeltaY']
+                : 0.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -167,7 +219,7 @@ extension PointerDataBinding on PointerData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerData');
+        return const HTType('PointerData');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -231,7 +283,7 @@ extension PointerDataBinding on PointerData {
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -244,9 +296,11 @@ class PointerDataPacketAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerDataPacket':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerDataPacket(
-            data: namedArgs.containsKey('data') ? List<PointerData>.from(namedArgs['data']) : const <PointerData>[]);
+            data: namedArgs.containsKey('data')
+                ? List<PointerData>.from(namedArgs['data'])
+                : const <PointerData>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -260,11 +314,11 @@ extension PointerDataPacketBinding on PointerDataPacket {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerDataPacket');
+        return const HTType('PointerDataPacket');
       case 'data':
         return data;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/semantics.g.dart b/lib/bindings/dart/ui/semantics.g.dart
index 0fcc8c0..cf54ec4 100644
--- a/lib/bindings/dart/ui/semantics.g.dart
+++ b/lib/bindings/dart/ui/semantics.g.dart
@@ -52,7 +52,7 @@ class SemanticsActionAutoBinding extends HTExternalClass {
       case 'SemanticsAction.values':
         return SemanticsAction.values;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -114,7 +114,7 @@ class SemanticsFlagAutoBinding extends HTExternalClass {
       case 'SemanticsFlag.values':
         return SemanticsFlag.values;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -126,9 +126,10 @@ class SemanticsUpdateBuilderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SemanticsUpdateBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => SemanticsUpdateBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SemanticsUpdateBuilder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -142,47 +143,88 @@ extension SemanticsUpdateBuilderBinding on SemanticsUpdateBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsUpdateBuilder');
+        return const HTType('SemanticsUpdateBuilder');
       case 'updateNode':
         return ({positionalArgs, namedArgs, typeArgs}) => updateNode(
             id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
             flags: namedArgs.containsKey('flags') ? namedArgs['flags'] : null,
-            actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
-            maxValueLength: namedArgs.containsKey('maxValueLength') ? namedArgs['maxValueLength'] : null,
-            currentValueLength: namedArgs.containsKey('currentValueLength') ? namedArgs['currentValueLength'] : null,
-            textSelectionBase: namedArgs.containsKey('textSelectionBase') ? namedArgs['textSelectionBase'] : null,
-            textSelectionExtent: namedArgs.containsKey('textSelectionExtent') ? namedArgs['textSelectionExtent'] : null,
-            platformViewId: namedArgs.containsKey('platformViewId') ? namedArgs['platformViewId'] : null,
-            scrollChildren: namedArgs.containsKey('scrollChildren') ? namedArgs['scrollChildren'] : null,
-            scrollIndex: namedArgs.containsKey('scrollIndex') ? namedArgs['scrollIndex'] : null,
-            scrollPosition: namedArgs.containsKey('scrollPosition') ? namedArgs['scrollPosition'] : null,
-            scrollExtentMax: namedArgs.containsKey('scrollExtentMax') ? namedArgs['scrollExtentMax'] : null,
-            scrollExtentMin: namedArgs.containsKey('scrollExtentMin') ? namedArgs['scrollExtentMin'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
+            actions:
+                namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
+            maxValueLength: namedArgs.containsKey('maxValueLength')
+                ? namedArgs['maxValueLength']
+                : null,
+            currentValueLength: namedArgs.containsKey('currentValueLength')
+                ? namedArgs['currentValueLength']
+                : null,
+            textSelectionBase: namedArgs.containsKey('textSelectionBase')
+                ? namedArgs['textSelectionBase']
+                : null,
+            textSelectionExtent: namedArgs.containsKey('textSelectionExtent')
+                ? namedArgs['textSelectionExtent']
+                : null,
+            platformViewId: namedArgs.containsKey('platformViewId')
+                ? namedArgs['platformViewId']
+                : null,
+            scrollChildren: namedArgs.containsKey('scrollChildren')
+                ? namedArgs['scrollChildren']
+                : null,
+            scrollIndex: namedArgs.containsKey('scrollIndex')
+                ? namedArgs['scrollIndex']
+                : null,
+            scrollPosition: namedArgs.containsKey('scrollPosition')
+                ? namedArgs['scrollPosition']
+                : null,
+            scrollExtentMax: namedArgs.containsKey('scrollExtentMax')
+                ? namedArgs['scrollExtentMax']
+                : null,
+            scrollExtentMin: namedArgs.containsKey('scrollExtentMin')
+                ? namedArgs['scrollExtentMin']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
             label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
             hint: namedArgs.containsKey('hint') ? namedArgs['hint'] : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            increasedValue: namedArgs.containsKey('increasedValue') ? namedArgs['increasedValue'] : null,
-            decreasedValue: namedArgs.containsKey('decreasedValue') ? namedArgs['decreasedValue'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
+            increasedValue: namedArgs.containsKey('increasedValue')
+                ? namedArgs['increasedValue']
+                : null,
+            decreasedValue: namedArgs.containsKey('decreasedValue')
+                ? namedArgs['decreasedValue']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
             childrenInTraversalOrder:
-                namedArgs.containsKey('childrenInTraversalOrder') ? namedArgs['childrenInTraversalOrder'] : null,
+                namedArgs.containsKey('childrenInTraversalOrder')
+                    ? namedArgs['childrenInTraversalOrder']
+                    : null,
             childrenInHitTestOrder:
-                namedArgs.containsKey('childrenInHitTestOrder') ? namedArgs['childrenInHitTestOrder'] : null,
-            additionalActions: namedArgs.containsKey('additionalActions') ? namedArgs['additionalActions'] : null);
+                namedArgs.containsKey('childrenInHitTestOrder')
+                    ? namedArgs['childrenInHitTestOrder']
+                    : null,
+            additionalActions: namedArgs.containsKey('additionalActions')
+                ? namedArgs['additionalActions']
+                : null);
       case 'updateCustomAction':
         return ({positionalArgs, namedArgs, typeArgs}) => updateCustomAction(
             id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
             label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
             hint: namedArgs.containsKey('hint') ? namedArgs['hint'] : null,
-            overrideId: namedArgs.containsKey('overrideId') ? namedArgs['overrideId'] : -1);
+            overrideId: namedArgs.containsKey('overrideId')
+                ? namedArgs['overrideId']
+                : -1);
       case 'build':
         return ({positionalArgs, namedArgs, typeArgs}) => build();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/text.g.dart b/lib/bindings/dart/ui/text.g.dart
index f6934cc..47f81ef 100644
--- a/lib/bindings/dart/ui/text.g.dart
+++ b/lib/bindings/dart/ui/text.g.dart
@@ -14,7 +14,7 @@ class FontStyleAutoBinding extends HTExternalClass {
       case 'FontStyle.italic':
         return FontStyle.italic;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class FontStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FontStyle');
+        return const HTType('FontStyle');
       case 'index':
         return (instance as FontStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FontStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FontStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,7 +55,7 @@ class TextAlignAutoBinding extends HTExternalClass {
       case 'TextAlign.end':
         return TextAlign.end;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,13 +63,14 @@ class TextAlignAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextAlign');
+        return const HTType('TextAlign');
       case 'index':
         return (instance as TextAlign).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextAlign).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextAlign).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -86,7 +88,7 @@ class TextBaselineAutoBinding extends HTExternalClass {
       case 'TextBaseline.ideographic':
         return TextBaseline.ideographic;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -94,13 +96,14 @@ class TextBaselineAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextBaseline');
+        return const HTType('TextBaseline');
       case 'index':
         return (instance as TextBaseline).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextBaseline).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextBaseline).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -124,7 +127,7 @@ class TextDecorationStyleAutoBinding extends HTExternalClass {
       case 'TextDecorationStyle.wavy':
         return TextDecorationStyle.wavy;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -132,13 +135,14 @@ class TextDecorationStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextDecorationStyle');
+        return const HTType('TextDecorationStyle');
       case 'index':
         return (instance as TextDecorationStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextDecorationStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextDecorationStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -156,7 +160,7 @@ class TextDirectionAutoBinding extends HTExternalClass {
       case 'TextDirection.ltr':
         return TextDirection.ltr;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -164,13 +168,14 @@ class TextDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextDirection');
+        return const HTType('TextDirection');
       case 'index':
         return (instance as TextDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -188,7 +193,7 @@ class TextAffinityAutoBinding extends HTExternalClass {
       case 'TextAffinity.downstream':
         return TextAffinity.downstream;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -196,13 +201,14 @@ class TextAffinityAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextAffinity');
+        return const HTType('TextAffinity');
       case 'index':
         return (instance as TextAffinity).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextAffinity).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextAffinity).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -228,7 +234,7 @@ class BoxHeightStyleAutoBinding extends HTExternalClass {
       case 'BoxHeightStyle.strut':
         return BoxHeightStyle.strut;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -236,13 +242,14 @@ class BoxHeightStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxHeightStyle');
+        return const HTType('BoxHeightStyle');
       case 'index':
         return (instance as BoxHeightStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BoxHeightStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BoxHeightStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -260,7 +267,7 @@ class BoxWidthStyleAutoBinding extends HTExternalClass {
       case 'BoxWidthStyle.max':
         return BoxWidthStyle.max;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -268,13 +275,14 @@ class BoxWidthStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxWidthStyle');
+        return const HTType('BoxWidthStyle');
       case 'index':
         return (instance as BoxWidthStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BoxWidthStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BoxWidthStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -300,7 +308,7 @@ class PlaceholderAlignmentAutoBinding extends HTExternalClass {
       case 'PlaceholderAlignment.middle':
         return PlaceholderAlignment.middle;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -308,13 +316,14 @@ class PlaceholderAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlaceholderAlignment');
+        return const HTType('PlaceholderAlignment');
       case 'index':
         return (instance as PlaceholderAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PlaceholderAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PlaceholderAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -326,8 +335,8 @@ class FontWeightAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FontWeight.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            FontWeight.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => FontWeight.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'FontWeight.w100':
         return FontWeight.w100;
       case 'FontWeight.w200':
@@ -353,7 +362,7 @@ class FontWeightAutoBinding extends HTExternalClass {
       case 'FontWeight.values':
         return FontWeight.values;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -365,26 +374,35 @@ class FontFeatureAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FontFeature':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            FontFeature(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : 1);
+        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 1);
       case 'FontFeature.enable':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.enable(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.enable(positionalArgs[0]);
       case 'FontFeature.disable':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.disable(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.disable(positionalArgs[0]);
       case 'FontFeature.randomize':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.randomize();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.randomize();
       case 'FontFeature.stylisticSet':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.stylisticSet(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.stylisticSet(positionalArgs[0]);
       case 'FontFeature.slashedZero':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.slashedZero();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.slashedZero();
       case 'FontFeature.oldstyleFigures':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.oldstyleFigures();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.oldstyleFigures();
       case 'FontFeature.proportionalFigures':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.proportionalFigures();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.proportionalFigures();
       case 'FontFeature.tabularFigures':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontFeature.tabularFigures();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontFeature.tabularFigures();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -398,7 +416,7 @@ extension FontFeatureBinding on FontFeature {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FontFeature');
+        return const HTType('FontFeature');
       case 'feature':
         return feature;
       case 'value':
@@ -408,7 +426,7 @@ extension FontFeatureBinding on FontFeature {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -421,7 +439,8 @@ class TextDecorationAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TextDecoration.combine':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextDecoration.combine(List<TextDecoration>.from(positionalArgs[0]));
+            TextDecoration.combine(
+                List<TextDecoration>.from(positionalArgs[0]));
       case 'TextDecoration.none':
         return TextDecoration.none;
       case 'TextDecoration.underline':
@@ -431,7 +450,7 @@ class TextDecorationAutoBinding extends HTExternalClass {
       case 'TextDecoration.lineThrough':
         return TextDecoration.lineThrough;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -445,15 +464,16 @@ extension TextDecorationBinding on TextDecoration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextDecoration');
+        return const HTType('TextDecoration');
       case 'hashCode':
         return hashCode;
       case 'contains':
-        return ({positionalArgs, namedArgs, typeArgs}) => contains(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            contains(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -467,13 +487,18 @@ class TextHeightBehaviorAutoBinding extends HTExternalClass {
       case 'TextHeightBehavior':
         return ({positionalArgs, namedArgs, typeArgs}) => TextHeightBehavior(
             applyHeightToFirstAscent:
-                namedArgs.containsKey('applyHeightToFirstAscent') ? namedArgs['applyHeightToFirstAscent'] : true,
+                namedArgs.containsKey('applyHeightToFirstAscent')
+                    ? namedArgs['applyHeightToFirstAscent']
+                    : true,
             applyHeightToLastDescent:
-                namedArgs.containsKey('applyHeightToLastDescent') ? namedArgs['applyHeightToLastDescent'] : true);
+                namedArgs.containsKey('applyHeightToLastDescent')
+                    ? namedArgs['applyHeightToLastDescent']
+                    : true);
       case 'TextHeightBehavior.fromEncoded':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextHeightBehavior.fromEncoded(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextHeightBehavior.fromEncoded(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -487,7 +512,7 @@ extension TextHeightBehaviorBinding on TextHeightBehavior {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextHeightBehavior');
+        return const HTType('TextHeightBehavior');
       case 'applyHeightToFirstAscent':
         return applyHeightToFirstAscent;
       case 'applyHeightToLastDescent':
@@ -499,7 +524,7 @@ extension TextHeightBehaviorBinding on TextHeightBehavior {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -512,20 +537,42 @@ class ParagraphStyleAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ParagraphStyle':
         return ({positionalArgs, namedArgs, typeArgs}) => ParagraphStyle(
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontSize: namedArgs.containsKey('fontSize') ? namedArgs['fontSize'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            fontWeight: namedArgs.containsKey('fontWeight') ? namedArgs['fontWeight'] : null,
-            fontStyle: namedArgs.containsKey('fontStyle') ? namedArgs['fontStyle'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            ellipsis: namedArgs.containsKey('ellipsis') ? namedArgs['ellipsis'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null);
-      default:
-        throw HTErrorUndefined(varName);
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontSize: namedArgs.containsKey('fontSize')
+                ? namedArgs['fontSize']
+                : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
+            fontWeight: namedArgs.containsKey('fontWeight')
+                ? namedArgs['fontWeight']
+                : null,
+            fontStyle: namedArgs.containsKey('fontStyle')
+                ? namedArgs['fontStyle']
+                : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            ellipsis: namedArgs.containsKey('ellipsis')
+                ? namedArgs['ellipsis']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null);
+      default:
+        throw HTError.undefined(varName);
     }
   }
 
@@ -539,13 +586,13 @@ extension ParagraphStyleBinding on ParagraphStyle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ParagraphStyle');
+        return const HTType('ParagraphStyle');
       case 'hashCode':
         return hashCode;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -558,9 +605,13 @@ class TextBoxAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TextBox.fromLTRBD':
         return ({positionalArgs, namedArgs, typeArgs}) => TextBox.fromLTRBD(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -574,7 +625,7 @@ extension TextBoxBinding on TextBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextBox');
+        return const HTType('TextBox');
       case 'left':
         return left;
       case 'top':
@@ -596,7 +647,7 @@ extension TextBoxBinding on TextBox {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -610,9 +661,11 @@ class TextPositionAutoBinding extends HTExternalClass {
       case 'TextPosition':
         return ({positionalArgs, namedArgs, typeArgs}) => TextPosition(
             offset: namedArgs['offset'],
-            affinity: namedArgs.containsKey('affinity') ? namedArgs['affinity'] : TextAffinity.downstream);
+            affinity: namedArgs.containsKey('affinity')
+                ? namedArgs['affinity']
+                : TextAffinity.downstream);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -626,7 +679,7 @@ extension TextPositionBinding on TextPosition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextPosition');
+        return const HTType('TextPosition');
       case 'offset':
         return offset;
       case 'affinity':
@@ -636,7 +689,7 @@ extension TextPositionBinding on TextPosition {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -648,13 +701,15 @@ class TextRangeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextRange':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextRange(start: namedArgs['start'], end: namedArgs['end']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextRange(start: namedArgs['start'], end: namedArgs['end']);
       case 'TextRange.collapsed':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextRange.collapsed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextRange.collapsed(positionalArgs[0]);
       case 'TextRange.empty':
         return TextRange.empty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -668,7 +723,7 @@ extension TextRangeBinding on TextRange {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextRange');
+        return const HTType('TextRange');
       case 'start':
         return start;
       case 'end':
@@ -682,15 +737,18 @@ extension TextRangeBinding on TextRange {
       case 'hashCode':
         return hashCode;
       case 'textBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => textBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            textBefore(positionalArgs[0]);
       case 'textAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => textAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            textAfter(positionalArgs[0]);
       case 'textInside':
-        return ({positionalArgs, namedArgs, typeArgs}) => textInside(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            textInside(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -702,9 +760,10 @@ class ParagraphConstraintsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ParagraphConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => ParagraphConstraints(width: namedArgs['width']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ParagraphConstraints(width: namedArgs['width']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -718,7 +777,7 @@ extension ParagraphConstraintsBinding on ParagraphConstraints {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ParagraphConstraints');
+        return const HTType('ParagraphConstraints');
       case 'width':
         return width;
       case 'hashCode':
@@ -726,7 +785,7 @@ extension ParagraphConstraintsBinding on ParagraphConstraints {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -749,7 +808,7 @@ class LineMetricsAutoBinding extends HTExternalClass {
             baseline: namedArgs['baseline'],
             lineNumber: namedArgs['lineNumber']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -763,7 +822,7 @@ extension LineMetricsBinding on LineMetrics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LineMetrics');
+        return const HTType('LineMetrics');
       case 'hardBreak':
         return hardBreak;
       case 'ascent':
@@ -787,7 +846,7 @@ extension LineMetricsBinding on LineMetrics {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -799,9 +858,10 @@ class ParagraphBuilderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ParagraphBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => ParagraphBuilder(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ParagraphBuilder(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -815,27 +875,33 @@ extension ParagraphBuilderBinding on ParagraphBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ParagraphBuilder');
+        return const HTType('ParagraphBuilder');
       case 'placeholderCount':
         return placeholderCount;
       case 'placeholderScales':
         return placeholderScales;
       case 'pushStyle':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushStyle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            pushStyle(positionalArgs[0]);
       case 'pop':
         return ({positionalArgs, namedArgs, typeArgs}) => pop();
       case 'addText':
-        return ({positionalArgs, namedArgs, typeArgs}) => addText(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addText(positionalArgs[0]);
       case 'addPlaceholder':
         return ({positionalArgs, namedArgs, typeArgs}) => addPlaceholder(
             positionalArgs[0], positionalArgs[1], positionalArgs[2],
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
-            baselineOffset: namedArgs.containsKey('baselineOffset') ? namedArgs['baselineOffset'] : null,
-            baseline: namedArgs.containsKey('baseline') ? namedArgs['baseline'] : null);
+            baselineOffset: namedArgs.containsKey('baselineOffset')
+                ? namedArgs['baselineOffset']
+                : null,
+            baseline: namedArgs.containsKey('baseline')
+                ? namedArgs['baseline']
+                : null);
       case 'build':
         return ({positionalArgs, namedArgs, typeArgs}) => build();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/dart/ui/window.g.dart b/lib/bindings/dart/ui/window.g.dart
index d410b88..ee841a1 100644
--- a/lib/bindings/dart/ui/window.g.dart
+++ b/lib/bindings/dart/ui/window.g.dart
@@ -14,7 +14,7 @@ class BrightnessAutoBinding extends HTExternalClass {
       case 'Brightness.light':
         return Brightness.light;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class BrightnessAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Brightness');
+        return const HTType('Brightness');
       case 'index':
         return (instance as Brightness).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as Brightness).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as Brightness).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/animation/animation.g.dart b/lib/bindings/flutter/animation/animation.g.dart
index 612181f..d3f281b 100644
--- a/lib/bindings/flutter/animation/animation.g.dart
+++ b/lib/bindings/flutter/animation/animation.g.dart
@@ -18,7 +18,7 @@ class AnimationStatusAutoBinding extends HTExternalClass {
       case 'AnimationStatus.completed':
         return AnimationStatus.completed;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class AnimationStatusAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimationStatus');
+        return const HTType('AnimationStatus');
       case 'index':
         return (instance as AnimationStatus).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as AnimationStatus).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as AnimationStatus).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/animation/animation_controller.g.dart b/lib/bindings/flutter/animation/animation_controller.g.dart
index fb3176c..73cffeb 100644
--- a/lib/bindings/flutter/animation/animation_controller.g.dart
+++ b/lib/bindings/flutter/animation/animation_controller.g.dart
@@ -14,7 +14,7 @@ class AnimationBehaviorAutoBinding extends HTExternalClass {
       case 'AnimationBehavior.preserve':
         return AnimationBehavior.preserve;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class AnimationBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimationBehavior');
+        return const HTType('AnimationBehavior');
       case 'index':
         return (instance as AnimationBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as AnimationBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as AnimationBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,26 +43,48 @@ class AnimationControllerAutoBinding extends HTExternalClass {
       case 'AnimationController':
         return ({positionalArgs, namedArgs, typeArgs}) => AnimationController(
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
-            reverseDuration: namedArgs.containsKey('reverseDuration') ? namedArgs['reverseDuration'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            lowerBound: namedArgs.containsKey('lowerBound') ? namedArgs['lowerBound'] : 0.0,
-            upperBound: namedArgs.containsKey('upperBound') ? namedArgs['upperBound'] : 1.0,
-            animationBehavior:
-                namedArgs.containsKey('animationBehavior') ? namedArgs['animationBehavior'] : AnimationBehavior.normal,
-            vsync: namedArgs['vsync']);
-      case 'AnimationController.unbounded':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnimationController.unbounded(
-            value: namedArgs.containsKey('value') ? namedArgs['value'] : 0.0,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
-            reverseDuration: namedArgs.containsKey('reverseDuration') ? namedArgs['reverseDuration'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            vsync: namedArgs['vsync'],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
+            reverseDuration: namedArgs.containsKey('reverseDuration')
+                ? namedArgs['reverseDuration']
+                : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
+            lowerBound: namedArgs.containsKey('lowerBound')
+                ? namedArgs['lowerBound']
+                : 0.0,
+            upperBound: namedArgs.containsKey('upperBound')
+                ? namedArgs['upperBound']
+                : 1.0,
             animationBehavior: namedArgs.containsKey('animationBehavior')
                 ? namedArgs['animationBehavior']
-                : AnimationBehavior.preserve);
+                : AnimationBehavior.normal,
+            vsync: namedArgs['vsync']);
+      case 'AnimationController.unbounded':
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnimationController.unbounded(
+                value: namedArgs.containsKey('value')
+                    ? namedArgs['value']
+                    : 0.0,
+                duration: namedArgs
+                        .containsKey('duration')
+                    ? namedArgs['duration']
+                    : null,
+                reverseDuration: namedArgs
+                        .containsKey('reverseDuration')
+                    ? namedArgs['reverseDuration']
+                    : null,
+                debugLabel: namedArgs.containsKey('debugLabel')
+                    ? namedArgs['debugLabel']
+                    : null,
+                vsync: namedArgs['vsync'],
+                animationBehavior: namedArgs.containsKey('animationBehavior')
+                    ? namedArgs['animationBehavior']
+                    : AnimationBehavior.preserve);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -77,9 +100,10 @@ class AnimationControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AnimationStatusListener': (HTFunction function) =>
-          (status) => function.call(positionalArgs: [status], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AnimationStatusListener': (HTFunction function) => (status) =>
+          function.call(positionalArgs: [status], namedArgs: const {}),
     };
   }
 }
@@ -88,7 +112,7 @@ extension AnimationControllerBinding on AnimationController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimationController');
+        return const HTType('AnimationController');
       case 'lowerBound':
         return lowerBound;
       case 'upperBound':
@@ -118,39 +142,60 @@ extension AnimationControllerBinding on AnimationController {
       case 'isCompleted':
         return isCompleted;
       case 'resync':
-        return ({positionalArgs, namedArgs, typeArgs}) => resync(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resync(positionalArgs[0]);
       case 'reset':
         return ({positionalArgs, namedArgs, typeArgs}) => reset();
       case 'forward':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            forward(from: namedArgs.containsKey('from') ? namedArgs['from'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => forward(
+            from: namedArgs.containsKey('from') ? namedArgs['from'] : null);
       case 'reverse':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            reverse(from: namedArgs.containsKey('from') ? namedArgs['from'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => reverse(
+            from: namedArgs.containsKey('from') ? namedArgs['from'] : null);
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear);
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear);
       case 'animateBack':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateBack(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear);
+        return ({positionalArgs, namedArgs, typeArgs}) => animateBack(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear);
       case 'repeat':
         return ({positionalArgs, namedArgs, typeArgs}) => repeat(
             min: namedArgs.containsKey('min') ? namedArgs['min'] : null,
             max: namedArgs.containsKey('max') ? namedArgs['max'] : null,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            period: namedArgs.containsKey('period') ? namedArgs['period'] : null);
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            period:
+                namedArgs.containsKey('period') ? namedArgs['period'] : null);
       case 'fling':
         return ({positionalArgs, namedArgs, typeArgs}) => fling(
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : 1.0,
-            springDescription: namedArgs.containsKey('springDescription') ? namedArgs['springDescription'] : null,
-            animationBehavior: namedArgs.containsKey('animationBehavior') ? namedArgs['animationBehavior'] : null);
+            velocity:
+                namedArgs.containsKey('velocity') ? namedArgs['velocity'] : 1.0,
+            springDescription: namedArgs.containsKey('springDescription')
+                ? namedArgs['springDescription']
+                : null,
+            animationBehavior: namedArgs.containsKey('animationBehavior')
+                ? namedArgs['animationBehavior']
+                : null);
       case 'animateWith':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateWith(positionalArgs[0]);
-      case 'stop':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            stop(canceled: namedArgs.containsKey('canceled') ? namedArgs['canceled'] : true);
+            animateWith(positionalArgs[0]);
+      case 'stop':
+        return ({positionalArgs, namedArgs, typeArgs}) => stop(
+            canceled: namedArgs.containsKey('canceled')
+                ? namedArgs['canceled']
+                : true);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toStringDetails':
@@ -158,25 +203,32 @@ extension AnimationControllerBinding on AnimationController {
       case 'didRegisterListener':
         return ({positionalArgs, namedArgs, typeArgs}) => didRegisterListener();
       case 'didUnregisterListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnregisterListener();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnregisterListener();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'notifyListeners':
         return ({positionalArgs, namedArgs, typeArgs}) => notifyListeners();
       case 'addStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addStatusListener(positionalArgs[0]);
       case 'removeStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeStatusListener(positionalArgs[0]);
       case 'notifyStatusListeners':
-        return ({positionalArgs, namedArgs, typeArgs}) => notifyStatusListeners(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            notifyStatusListeners(positionalArgs[0]);
       case 'drive':
-        return ({positionalArgs, namedArgs, typeArgs}) => drive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drive(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -192,7 +244,7 @@ extension AnimationControllerBinding on AnimationController {
         value = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/animation/animations.g.dart b/lib/bindings/flutter/animation/animations.g.dart
index 2bbe43a..27f3e80 100644
--- a/lib/bindings/flutter/animation/animations.g.dart
+++ b/lib/bindings/flutter/animation/animations.g.dart
@@ -8,10 +8,10 @@ class ProxyAnimationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ProxyAnimation':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ProxyAnimation(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ProxyAnimation(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,9 +27,10 @@ class ProxyAnimationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AnimationStatusListener': (HTFunction function) =>
-          (status) => function.call(positionalArgs: [status], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AnimationStatusListener': (HTFunction function) => (status) =>
+          function.call(positionalArgs: [status], namedArgs: const {}),
     };
   }
 }
@@ -38,7 +39,7 @@ extension ProxyAnimationBinding on ProxyAnimation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ProxyAnimation');
+        return const HTType('ProxyAnimation');
       case 'parent':
         return parent;
       case 'status':
@@ -60,25 +61,32 @@ extension ProxyAnimationBinding on ProxyAnimation {
       case 'didRegisterListener':
         return ({positionalArgs, namedArgs, typeArgs}) => didRegisterListener();
       case 'didUnregisterListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnregisterListener();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnregisterListener();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'notifyListeners':
         return ({positionalArgs, namedArgs, typeArgs}) => notifyListeners();
       case 'addStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addStatusListener(positionalArgs[0]);
       case 'removeStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeStatusListener(positionalArgs[0]);
       case 'notifyStatusListeners':
-        return ({positionalArgs, namedArgs, typeArgs}) => notifyStatusListeners(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            notifyStatusListeners(positionalArgs[0]);
       case 'drive':
-        return ({positionalArgs, namedArgs, typeArgs}) => drive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drive(positionalArgs[0]);
       case 'toStringDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDetails();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -88,7 +96,7 @@ extension ProxyAnimationBinding on ProxyAnimation {
         parent = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -100,9 +108,10 @@ class ReverseAnimationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ReverseAnimation':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReverseAnimation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReverseAnimation(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -113,9 +122,10 @@ class ReverseAnimationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AnimationStatusListener': (HTFunction function) =>
-          (status) => function.call(positionalArgs: [status], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AnimationStatusListener': (HTFunction function) => (status) =>
+          function.call(positionalArgs: [status], namedArgs: const {}),
     };
   }
 }
@@ -124,7 +134,7 @@ extension ReverseAnimationBinding on ReverseAnimation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReverseAnimation');
+        return const HTType('ReverseAnimation');
       case 'parent':
         return parent;
       case 'status':
@@ -138,9 +148,11 @@ extension ReverseAnimationBinding on ReverseAnimation {
       case 'isCompleted':
         return isCompleted;
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'didStartListening':
         return ({positionalArgs, namedArgs, typeArgs}) => didStartListening();
       case 'didStopListening':
@@ -150,19 +162,24 @@ extension ReverseAnimationBinding on ReverseAnimation {
       case 'didRegisterListener':
         return ({positionalArgs, namedArgs, typeArgs}) => didRegisterListener();
       case 'didUnregisterListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnregisterListener();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnregisterListener();
       case 'addStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addStatusListener(positionalArgs[0]);
       case 'removeStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeStatusListener(positionalArgs[0]);
       case 'notifyStatusListeners':
-        return ({positionalArgs, namedArgs, typeArgs}) => notifyStatusListeners(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            notifyStatusListeners(positionalArgs[0]);
       case 'drive':
-        return ({positionalArgs, namedArgs, typeArgs}) => drive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drive(positionalArgs[0]);
       case 'toStringDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDetails();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -177,9 +194,11 @@ class CurvedAnimationAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CurvedAnimation(
             parent: namedArgs['parent'],
             curve: namedArgs['curve'],
-            reverseCurve: namedArgs.containsKey('reverseCurve') ? namedArgs['reverseCurve'] : null);
+            reverseCurve: namedArgs.containsKey('reverseCurve')
+                ? namedArgs['reverseCurve']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -195,9 +214,10 @@ class CurvedAnimationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AnimationStatusListener': (HTFunction function) =>
-          (status) => function.call(positionalArgs: [status], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AnimationStatusListener': (HTFunction function) => (status) =>
+          function.call(positionalArgs: [status], namedArgs: const {}),
     };
   }
 }
@@ -206,7 +226,7 @@ extension CurvedAnimationBinding on CurvedAnimation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CurvedAnimation');
+        return const HTType('CurvedAnimation');
       case 'parent':
         return parent;
       case 'curve':
@@ -224,19 +244,24 @@ extension CurvedAnimationBinding on CurvedAnimation {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'addStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addStatusListener(positionalArgs[0]);
       case 'removeStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeStatusListener(positionalArgs[0]);
       case 'drive':
-        return ({positionalArgs, namedArgs, typeArgs}) => drive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drive(positionalArgs[0]);
       case 'toStringDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDetails();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -249,7 +274,7 @@ extension CurvedAnimationBinding on CurvedAnimation {
         reverseCurve = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -261,10 +286,13 @@ class TrainHoppingAnimationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TrainHoppingAnimation':
-        return ({positionalArgs, namedArgs, typeArgs}) => TrainHoppingAnimation(positionalArgs[0], positionalArgs[1],
-            onSwitchedTrain: namedArgs.containsKey('onSwitchedTrain') ? namedArgs['onSwitchedTrain'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => TrainHoppingAnimation(
+            positionalArgs[0], positionalArgs[1],
+            onSwitchedTrain: namedArgs.containsKey('onSwitchedTrain')
+                ? namedArgs['onSwitchedTrain']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -280,9 +308,10 @@ class TrainHoppingAnimationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AnimationStatusListener': (HTFunction function) =>
-          (status) => function.call(positionalArgs: [status], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AnimationStatusListener': (HTFunction function) => (status) =>
+          function.call(positionalArgs: [status], namedArgs: const {}),
     };
   }
 }
@@ -291,7 +320,7 @@ extension TrainHoppingAnimationBinding on TrainHoppingAnimation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TrainHoppingAnimation');
+        return const HTType('TrainHoppingAnimation');
       case 'onSwitchedTrain':
         return onSwitchedTrain;
       case 'currentTrain':
@@ -311,25 +340,32 @@ extension TrainHoppingAnimationBinding on TrainHoppingAnimation {
       case 'didRegisterListener':
         return ({positionalArgs, namedArgs, typeArgs}) => didRegisterListener();
       case 'didUnregisterListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnregisterListener();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnregisterListener();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'notifyListeners':
         return ({positionalArgs, namedArgs, typeArgs}) => notifyListeners();
       case 'addStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addStatusListener(positionalArgs[0]);
       case 'removeStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeStatusListener(positionalArgs[0]);
       case 'notifyStatusListeners':
-        return ({positionalArgs, namedArgs, typeArgs}) => notifyStatusListeners(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            notifyStatusListeners(positionalArgs[0]);
       case 'drive':
-        return ({positionalArgs, namedArgs, typeArgs}) => drive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drive(positionalArgs[0]);
       case 'toStringDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDetails();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -339,7 +375,7 @@ extension TrainHoppingAnimationBinding on TrainHoppingAnimation {
         onSwitchedTrain = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -354,7 +390,7 @@ class AnimationMeanAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             AnimationMean(left: namedArgs['left'], right: namedArgs['right']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -365,9 +401,10 @@ class AnimationMeanAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AnimationStatusListener': (HTFunction function) =>
-          (status) => function.call(positionalArgs: [status], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AnimationStatusListener': (HTFunction function) => (status) =>
+          function.call(positionalArgs: [status], namedArgs: const {}),
     };
   }
 }
@@ -376,7 +413,7 @@ extension AnimationMeanBinding on AnimationMean {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimationMean');
+        return const HTType('AnimationMean');
       case 'first':
         return first;
       case 'next':
@@ -400,25 +437,32 @@ extension AnimationMeanBinding on AnimationMean {
       case 'didRegisterListener':
         return ({positionalArgs, namedArgs, typeArgs}) => didRegisterListener();
       case 'didUnregisterListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnregisterListener();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnregisterListener();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'notifyListeners':
         return ({positionalArgs, namedArgs, typeArgs}) => notifyListeners();
       case 'addStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addStatusListener(positionalArgs[0]);
       case 'removeStatusListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeStatusListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeStatusListener(positionalArgs[0]);
       case 'notifyStatusListeners':
-        return ({positionalArgs, namedArgs, typeArgs}) => notifyStatusListeners(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            notifyStatusListeners(positionalArgs[0]);
       case 'drive':
-        return ({positionalArgs, namedArgs, typeArgs}) => drive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drive(positionalArgs[0]);
       case 'toStringDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDetails();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/animation/curves.g.dart b/lib/bindings/flutter/animation/curves.g.dart
index 1cff14e..e689889 100644
--- a/lib/bindings/flutter/animation/curves.g.dart
+++ b/lib/bindings/flutter/animation/curves.g.dart
@@ -9,9 +9,10 @@ class SawToothAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SawTooth':
-        return ({positionalArgs, namedArgs, typeArgs}) => SawTooth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SawTooth(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,19 +26,21 @@ extension SawToothBinding on SawTooth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SawTooth');
+        return const HTType('SawTooth');
       case 'count':
         return count;
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -49,10 +52,13 @@ class IntervalAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Interval':
-        return ({positionalArgs, namedArgs, typeArgs}) => Interval(positionalArgs[0], positionalArgs[1],
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear);
+        return ({positionalArgs, namedArgs, typeArgs}) => Interval(
+            positionalArgs[0], positionalArgs[1],
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +72,7 @@ extension IntervalBinding on Interval {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Interval');
+        return const HTType('Interval');
       case 'begin':
         return begin;
       case 'end':
@@ -76,13 +82,15 @@ extension IntervalBinding on Interval {
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -94,9 +102,10 @@ class ThresholdAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Threshold':
-        return ({positionalArgs, namedArgs, typeArgs}) => Threshold(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Threshold(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,19 +119,21 @@ extension ThresholdBinding on Threshold {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Threshold');
+        return const HTType('Threshold');
       case 'threshold':
         return threshold;
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -134,10 +145,13 @@ class CubicAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Cubic':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Cubic(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => Cubic(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -151,7 +165,7 @@ extension CubicBinding on Cubic {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Cubic');
+        return const HTType('Cubic');
       case 'a':
         return a;
       case 'b':
@@ -163,13 +177,15 @@ extension CubicBinding on Cubic {
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -181,9 +197,10 @@ class Curve2DSampleAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Curve2DSample':
-        return ({positionalArgs, namedArgs, typeArgs}) => Curve2DSample(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Curve2DSample(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -197,7 +214,7 @@ extension Curve2DSampleBinding on Curve2DSample {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Curve2DSample');
+        return const HTType('Curve2DSample');
       case 't':
         return t;
       case 'value':
@@ -205,7 +222,7 @@ extension Curve2DSampleBinding on Curve2DSample {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -217,18 +234,30 @@ class CatmullRomSplineAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CatmullRomSpline':
-        return ({positionalArgs, namedArgs, typeArgs}) => CatmullRomSpline(List<Offset>.from(positionalArgs[0]),
-            tension: namedArgs.containsKey('tension') ? namedArgs['tension'] : 0.0,
-            startHandle: namedArgs.containsKey('startHandle') ? namedArgs['startHandle'] : null,
-            endHandle: namedArgs.containsKey('endHandle') ? namedArgs['endHandle'] : null);
-      case 'CatmullRomSpline.precompute':
-        return ({positionalArgs, namedArgs, typeArgs}) => CatmullRomSpline.precompute(
+        return ({positionalArgs, namedArgs, typeArgs}) => CatmullRomSpline(
             List<Offset>.from(positionalArgs[0]),
-            tension: namedArgs.containsKey('tension') ? namedArgs['tension'] : 0.0,
-            startHandle: namedArgs.containsKey('startHandle') ? namedArgs['startHandle'] : null,
-            endHandle: namedArgs.containsKey('endHandle') ? namedArgs['endHandle'] : null);
+            tension:
+                namedArgs.containsKey('tension') ? namedArgs['tension'] : 0.0,
+            startHandle: namedArgs.containsKey('startHandle')
+                ? namedArgs['startHandle']
+                : null,
+            endHandle: namedArgs.containsKey('endHandle')
+                ? namedArgs['endHandle']
+                : null);
+      case 'CatmullRomSpline.precompute':
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CatmullRomSpline.precompute(List<Offset>.from(positionalArgs[0]),
+                tension: namedArgs.containsKey('tension')
+                    ? namedArgs['tension']
+                    : 0.0,
+                startHandle: namedArgs.containsKey('startHandle')
+                    ? namedArgs['startHandle']
+                    : null,
+                endHandle: namedArgs.containsKey('endHandle')
+                    ? namedArgs['endHandle']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -242,22 +271,27 @@ extension CatmullRomSplineBinding on CatmullRomSpline {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CatmullRomSpline');
+        return const HTType('CatmullRomSpline');
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'generateSamples':
         return ({positionalArgs, namedArgs, typeArgs}) => generateSamples(
             start: namedArgs.containsKey('start') ? namedArgs['start'] : 0.0,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : 1.0,
-            tolerance: namedArgs.containsKey('tolerance') ? namedArgs['tolerance'] : 1e-10);
+            tolerance: namedArgs.containsKey('tolerance')
+                ? namedArgs['tolerance']
+                : 1e-10);
       case 'findInverse':
-        return ({positionalArgs, namedArgs, typeArgs}) => findInverse(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findInverse(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -269,19 +303,28 @@ class CatmullRomCurveAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CatmullRomCurve':
-        return ({positionalArgs, namedArgs, typeArgs}) => CatmullRomCurve(List<Offset>.from(positionalArgs[0]),
-            tension: namedArgs.containsKey('tension') ? namedArgs['tension'] : 0.0);
-      case 'CatmullRomCurve.precompute':
-        return ({positionalArgs, namedArgs, typeArgs}) => CatmullRomCurve.precompute(
+        return ({positionalArgs, namedArgs, typeArgs}) => CatmullRomCurve(
             List<Offset>.from(positionalArgs[0]),
-            tension: namedArgs.containsKey('tension') ? namedArgs['tension'] : 0.0);
+            tension:
+                namedArgs.containsKey('tension') ? namedArgs['tension'] : 0.0);
+      case 'CatmullRomCurve.precompute':
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CatmullRomCurve.precompute(List<Offset>.from(positionalArgs[0]),
+                tension: namedArgs.containsKey('tension')
+                    ? namedArgs['tension']
+                    : 0.0);
       case 'CatmullRomCurve.validateControlPoints':
-        return ({positionalArgs, namedArgs, typeArgs}) => CatmullRomCurve.validateControlPoints(
-            List<Offset>.from(positionalArgs[0]),
-            tension: namedArgs.containsKey('tension') ? namedArgs['tension'] : 0.0,
-            reasons: namedArgs.containsKey('reasons') ? List<String>.from(namedArgs['reasons']) : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CatmullRomCurve.validateControlPoints(
+                List<Offset>.from(positionalArgs[0]),
+                tension: namedArgs.containsKey('tension')
+                    ? namedArgs['tension']
+                    : 0.0,
+                reasons: namedArgs.containsKey('reasons')
+                    ? List<String>.from(namedArgs['reasons'])
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -295,7 +338,7 @@ extension CatmullRomCurveBinding on CatmullRomCurve {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CatmullRomCurve');
+        return const HTType('CatmullRomCurve');
       case 'controlPoints':
         return controlPoints;
       case 'tension':
@@ -303,13 +346,15 @@ extension CatmullRomCurveBinding on CatmullRomCurve {
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -321,9 +366,10 @@ class FlippedCurveAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlippedCurve':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlippedCurve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlippedCurve(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -337,19 +383,21 @@ extension FlippedCurveBinding on FlippedCurve {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlippedCurve');
+        return const HTType('FlippedCurve');
       case 'curve':
         return curve;
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -364,7 +412,7 @@ class ElasticInCurveAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             ElasticInCurve(positionalArgs.length > 0 ? positionalArgs[0] : 0.4);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -378,19 +426,21 @@ extension ElasticInCurveBinding on ElasticInCurve {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ElasticInCurve');
+        return const HTType('ElasticInCurve');
       case 'period':
         return period;
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -402,10 +452,10 @@ class ElasticOutCurveAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ElasticOutCurve':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ElasticOutCurve(positionalArgs.length > 0 ? positionalArgs[0] : 0.4);
+        return ({positionalArgs, namedArgs, typeArgs}) => ElasticOutCurve(
+            positionalArgs.length > 0 ? positionalArgs[0] : 0.4);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -419,19 +469,21 @@ extension ElasticOutCurveBinding on ElasticOutCurve {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ElasticOutCurve');
+        return const HTType('ElasticOutCurve');
       case 'period':
         return period;
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -443,10 +495,10 @@ class ElasticInOutCurveAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ElasticInOutCurve':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ElasticInOutCurve(positionalArgs.length > 0 ? positionalArgs[0] : 0.4);
+        return ({positionalArgs, namedArgs, typeArgs}) => ElasticInOutCurve(
+            positionalArgs.length > 0 ? positionalArgs[0] : 0.4);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -460,19 +512,21 @@ extension ElasticInOutCurveBinding on ElasticInOutCurve {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ElasticInOutCurve');
+        return const HTType('ElasticInOutCurve');
       case 'period':
         return period;
       case 'flipped':
         return flipped;
       case 'transformInternal':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformInternal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformInternal(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -566,7 +620,7 @@ class CurvesAutoBinding extends HTExternalClass {
       case 'Curves.elasticInOut':
         return Curves.elasticInOut;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/animation/tween.g.dart b/lib/bindings/flutter/animation/tween.g.dart
index 7c65f43..057b9d8 100644
--- a/lib/bindings/flutter/animation/tween.g.dart
+++ b/lib/bindings/flutter/animation/tween.g.dart
@@ -12,7 +12,7 @@ class ColorTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,25 +31,30 @@ extension ColorTweenBinding on ColorTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ColorTween');
+        return const HTType('ColorTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,7 +67,7 @@ extension ColorTweenBinding on ColorTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -78,7 +83,7 @@ class SizeTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -97,25 +102,30 @@ extension SizeTweenBinding on SizeTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SizeTween');
+        return const HTType('SizeTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -128,7 +138,7 @@ extension SizeTweenBinding on SizeTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -144,7 +154,7 @@ class RectTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -163,25 +173,30 @@ extension RectTweenBinding on RectTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RectTween');
+        return const HTType('RectTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -194,7 +209,7 @@ extension RectTweenBinding on RectTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -210,7 +225,7 @@ class IntTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -229,25 +244,30 @@ extension IntTweenBinding on IntTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IntTween');
+        return const HTType('IntTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -260,7 +280,7 @@ extension IntTweenBinding on IntTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -276,7 +296,7 @@ class StepTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -295,25 +315,30 @@ extension StepTweenBinding on StepTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StepTween');
+        return const HTType('StepTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -326,7 +351,7 @@ extension StepTweenBinding on StepTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -338,9 +363,10 @@ class CurveTweenAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CurveTween':
-        return ({positionalArgs, namedArgs, typeArgs}) => CurveTween(curve: namedArgs['curve']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CurveTween(curve: namedArgs['curve']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -359,21 +385,25 @@ extension CurveTweenBinding on CurveTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CurveTween');
+        return const HTType('CurveTween');
       case 'curve':
         return curve;
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -383,7 +413,7 @@ extension CurveTweenBinding on CurveTween {
         curve = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/animation/tween_sequence.g.dart b/lib/bindings/flutter/animation/tween_sequence.g.dart
index f16f1b2..ea620bb 100644
--- a/lib/bindings/flutter/animation/tween_sequence.g.dart
+++ b/lib/bindings/flutter/animation/tween_sequence.g.dart
@@ -8,10 +8,10 @@ class FlippedTweenSequenceAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlippedTweenSequence':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            FlippedTweenSequence(List<TweenSequenceItem<double>>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) => FlippedTweenSequence(
+            List<TweenSequenceItem<double>>.from(positionalArgs[0]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,19 +25,23 @@ extension FlippedTweenSequenceBinding on FlippedTweenSequence {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlippedTweenSequence');
+        return const HTType('FlippedTweenSequence');
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/action_sheet.g.dart b/lib/bindings/flutter/cupertino/action_sheet.g.dart
index d8be497..3bb3822 100644
--- a/lib/bindings/flutter/cupertino/action_sheet.g.dart
+++ b/lib/bindings/flutter/cupertino/action_sheet.g.dart
@@ -14,15 +14,24 @@ class CupertinoActionSheetAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoActionSheet(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            message: namedArgs.containsKey('message') ? namedArgs['message'] : null,
-            actions: namedArgs.containsKey('actions') ? List<Widget>.from(namedArgs['actions']) : null,
+            message:
+                namedArgs.containsKey('message') ? namedArgs['message'] : null,
+            actions: namedArgs.containsKey('actions')
+                ? List<Widget>.from(namedArgs['actions'])
+                : null,
             messageScrollController:
-                namedArgs.containsKey('messageScrollController') ? namedArgs['messageScrollController'] : null,
+                namedArgs.containsKey('messageScrollController')
+                    ? namedArgs['messageScrollController']
+                    : null,
             actionScrollController:
-                namedArgs.containsKey('actionScrollController') ? namedArgs['actionScrollController'] : null,
-            cancelButton: namedArgs.containsKey('cancelButton') ? namedArgs['cancelButton'] : null);
+                namedArgs.containsKey('actionScrollController')
+                    ? namedArgs['actionScrollController']
+                    : null,
+            cancelButton: namedArgs.containsKey('cancelButton')
+                ? namedArgs['cancelButton']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,7 +45,7 @@ extension CupertinoActionSheetBinding on CupertinoActionSheet {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoActionSheet');
+        return const HTType('CupertinoActionSheet');
       case 'title':
         return title;
       case 'message':
@@ -54,31 +63,44 @@ extension CupertinoActionSheetBinding on CupertinoActionSheet {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,15 +112,20 @@ class CupertinoActionSheetActionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoActionSheetAction':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoActionSheetAction(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onPressed: namedArgs['onPressed'],
-            isDefaultAction: namedArgs.containsKey('isDefaultAction') ? namedArgs['isDefaultAction'] : false,
-            isDestructiveAction:
-                namedArgs.containsKey('isDestructiveAction') ? namedArgs['isDestructiveAction'] : false,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoActionSheetAction(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                onPressed: namedArgs['onPressed'],
+                isDefaultAction: namedArgs.containsKey('isDefaultAction')
+                    ? namedArgs['isDefaultAction']
+                    : false,
+                isDestructiveAction:
+                    namedArgs.containsKey('isDestructiveAction')
+                        ? namedArgs['isDestructiveAction']
+                        : false,
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -109,7 +136,8 @@ class CupertinoActionSheetActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -118,7 +146,7 @@ extension CupertinoActionSheetActionBinding on CupertinoActionSheetAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoActionSheetAction');
+        return const HTType('CupertinoActionSheetAction');
       case 'onPressed':
         return onPressed;
       case 'isDefaultAction':
@@ -132,31 +160,44 @@ extension CupertinoActionSheetActionBinding on CupertinoActionSheetAction {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/activity_indicator.g.dart b/lib/bindings/flutter/cupertino/activity_indicator.g.dart
index 29a4d86..34b851e 100644
--- a/lib/bindings/flutter/cupertino/activity_indicator.g.dart
+++ b/lib/bindings/flutter/cupertino/activity_indicator.g.dart
@@ -11,17 +11,27 @@ class CupertinoActivityIndicatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoActivityIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoActivityIndicator(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            animating: namedArgs.containsKey('animating') ? namedArgs['animating'] : true,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : _kDefaultIndicatorRadius);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoActivityIndicator(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                animating: namedArgs.containsKey('animating')
+                    ? namedArgs['animating']
+                    : true,
+                radius: namedArgs.containsKey('radius')
+                    ? namedArgs['radius']
+                    : _kDefaultIndicatorRadius);
       case 'CupertinoActivityIndicator.partiallyRevealed':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoActivityIndicator.partiallyRevealed(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : _kDefaultIndicatorRadius,
-            progress: namedArgs.containsKey('progress') ? namedArgs['progress'] : 1.0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoActivityIndicator.partiallyRevealed(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                radius: namedArgs.containsKey('radius')
+                    ? namedArgs['radius']
+                    : _kDefaultIndicatorRadius,
+                progress: namedArgs.containsKey('progress')
+                    ? namedArgs['progress']
+                    : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +45,7 @@ extension CupertinoActivityIndicatorBinding on CupertinoActivityIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoActivityIndicator');
+        return const HTType('CupertinoActivityIndicator');
       case 'animating':
         return animating;
       case 'radius':
@@ -53,25 +63,37 @@ extension CupertinoActivityIndicatorBinding on CupertinoActivityIndicator {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/app.g.dart b/lib/bindings/flutter/cupertino/app.g.dart
index 2224860..3c4d498 100644
--- a/lib/bindings/flutter/cupertino/app.g.dart
+++ b/lib/bindings/flutter/cupertino/app.g.dart
@@ -11,90 +11,121 @@ class CupertinoAppAutoBinding extends HTExternalClass {
       case 'CupertinoApp':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoApp(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            navigatorKey: namedArgs.containsKey('navigatorKey') ? namedArgs['navigatorKey'] : null,
+            navigatorKey: namedArgs.containsKey('navigatorKey')
+                ? namedArgs['navigatorKey']
+                : null,
             home: namedArgs.containsKey('home') ? namedArgs['home'] : null,
             theme: namedArgs.containsKey('theme') ? namedArgs['theme'] : null,
-            routes: namedArgs.containsKey('routes') ? namedArgs['routes'] : const <String, WidgetBuilder>{},
-            initialRoute: namedArgs.containsKey('initialRoute') ? namedArgs['initialRoute'] : null,
-            onGenerateRoute: namedArgs.containsKey('onGenerateRoute') ? namedArgs['onGenerateRoute'] : null,
-            onGenerateInitialRoutes:
-                namedArgs.containsKey('onGenerateInitialRoutes') ? namedArgs['onGenerateInitialRoutes'] : null,
-            onUnknownRoute: namedArgs.containsKey('onUnknownRoute') ? namedArgs['onUnknownRoute'] : null,
+            routes: namedArgs.containsKey('routes')
+                ? namedArgs['routes']
+                : const <String, WidgetBuilder>{},
+            initialRoute: namedArgs.containsKey('initialRoute')
+                ? namedArgs['initialRoute']
+                : null,
+            onGenerateRoute: namedArgs.containsKey('onGenerateRoute')
+                ? namedArgs['onGenerateRoute']
+                : null,
+            onGenerateInitialRoutes: namedArgs.containsKey('onGenerateInitialRoutes')
+                ? namedArgs['onGenerateInitialRoutes']
+                : null,
+            onUnknownRoute: namedArgs.containsKey('onUnknownRoute')
+                ? namedArgs['onUnknownRoute']
+                : null,
             navigatorObservers: namedArgs.containsKey('navigatorObservers')
                 ? List<NavigatorObserver>.from(namedArgs['navigatorObservers'])
                 : const <NavigatorObserver>[],
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : '',
-            onGenerateTitle: namedArgs.containsKey('onGenerateTitle') ? namedArgs['onGenerateTitle'] : null,
+            onGenerateTitle: namedArgs.containsKey('onGenerateTitle')
+                ? namedArgs['onGenerateTitle']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            localizationsDelegates:
-                namedArgs.containsKey('localizationsDelegates') ? namedArgs['localizationsDelegates'] : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            localizationsDelegates: namedArgs.containsKey('localizationsDelegates')
+                ? namedArgs['localizationsDelegates']
+                : null,
             localeListResolutionCallback: namedArgs.containsKey('localeListResolutionCallback')
                 ? namedArgs['localeListResolutionCallback']
                 : null,
-            localeResolutionCallback:
-                namedArgs.containsKey('localeResolutionCallback') ? namedArgs['localeResolutionCallback'] : null,
+            localeResolutionCallback: namedArgs.containsKey('localeResolutionCallback')
+                ? namedArgs['localeResolutionCallback']
+                : null,
             supportedLocales: namedArgs.containsKey('supportedLocales')
                 ? namedArgs['supportedLocales']
                 : const <Locale>[Locale('en', 'US')],
-            showPerformanceOverlay:
-                namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
-            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
-                ? namedArgs['checkerboardRasterCacheImages']
+            showPerformanceOverlay: namedArgs.containsKey('showPerformanceOverlay')
+                ? namedArgs['showPerformanceOverlay']
+                : false,
+            checkerboardRasterCacheImages:
+                namedArgs.containsKey('checkerboardRasterCacheImages')
+                    ? namedArgs['checkerboardRasterCacheImages']
+                    : false,
+            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers')
+                ? namedArgs['checkerboardOffscreenLayers']
+                : false,
+            showSemanticsDebugger: namedArgs.containsKey('showSemanticsDebugger')
+                ? namedArgs['showSemanticsDebugger']
                 : false,
-            checkerboardOffscreenLayers:
-                namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
-            showSemanticsDebugger:
-                namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
-            debugShowCheckedModeBanner:
-                namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
+            debugShowCheckedModeBanner: namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
             shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : null,
             actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
             restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
       case 'CupertinoApp.router':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoApp.router(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            routeInformationProvider:
-                namedArgs.containsKey('routeInformationProvider') ? namedArgs['routeInformationProvider'] : null,
+            routeInformationProvider: namedArgs.containsKey('routeInformationProvider')
+                ? namedArgs['routeInformationProvider']
+                : null,
             routeInformationParser: namedArgs['routeInformationParser'],
             routerDelegate: namedArgs['routerDelegate'],
-            backButtonDispatcher:
-                namedArgs.containsKey('backButtonDispatcher') ? namedArgs['backButtonDispatcher'] : null,
+            backButtonDispatcher: namedArgs.containsKey('backButtonDispatcher')
+                ? namedArgs['backButtonDispatcher']
+                : null,
             theme: namedArgs.containsKey('theme') ? namedArgs['theme'] : null,
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : '',
-            onGenerateTitle: namedArgs.containsKey('onGenerateTitle') ? namedArgs['onGenerateTitle'] : null,
+            onGenerateTitle: namedArgs.containsKey('onGenerateTitle')
+                ? namedArgs['onGenerateTitle']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            localizationsDelegates:
-                namedArgs.containsKey('localizationsDelegates') ? namedArgs['localizationsDelegates'] : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            localizationsDelegates: namedArgs.containsKey('localizationsDelegates')
+                ? namedArgs['localizationsDelegates']
+                : null,
             localeListResolutionCallback: namedArgs.containsKey('localeListResolutionCallback')
                 ? namedArgs['localeListResolutionCallback']
                 : null,
-            localeResolutionCallback:
-                namedArgs.containsKey('localeResolutionCallback') ? namedArgs['localeResolutionCallback'] : null,
+            localeResolutionCallback: namedArgs.containsKey('localeResolutionCallback')
+                ? namedArgs['localeResolutionCallback']
+                : null,
             supportedLocales: namedArgs.containsKey('supportedLocales')
                 ? namedArgs['supportedLocales']
                 : const <Locale>[Locale('en', 'US')],
-            showPerformanceOverlay:
-                namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
+            showPerformanceOverlay: namedArgs.containsKey('showPerformanceOverlay')
+                ? namedArgs['showPerformanceOverlay']
+                : false,
             checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
                 ? namedArgs['checkerboardRasterCacheImages']
                 : false,
-            checkerboardOffscreenLayers:
-                namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
-            showSemanticsDebugger:
-                namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
-            debugShowCheckedModeBanner:
-                namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
+            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers')
+                ? namedArgs['checkerboardOffscreenLayers']
+                : false,
+            showSemanticsDebugger: namedArgs.containsKey('showSemanticsDebugger')
+                ? namedArgs['showSemanticsDebugger']
+                : false,
+            debugShowCheckedModeBanner: namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
             shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : null,
             actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
             restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
       case 'CupertinoApp.createCupertinoHeroController':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoApp.createCupertinoHeroController();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoApp.createCupertinoHeroController();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -105,18 +136,25 @@ class CupertinoAppAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RouteFactory': (HTFunction function) =>
-          (settings) => function.call(positionalArgs: [settings], namedArgs: const {}) as Route<dynamic>?,
-      'InitialRouteListFactory': (HTFunction function) =>
-          (initialRoute) => function.call(positionalArgs: [initialRoute], namedArgs: const {}) as List<Route<dynamic>>,
-      'TransitionBuilder': (HTFunction function) =>
-          (context, child) => function.call(positionalArgs: [context, child], namedArgs: const {}) as Widget,
-      'GenerateAppTitle': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as String,
-      'LocaleListResolutionCallback': (HTFunction function) => (locales, supportedLocales) =>
-          function.call(positionalArgs: [locales, supportedLocales], namedArgs: const {}) as Locale?,
-      'LocaleResolutionCallback': (HTFunction function) => (locale, supportedLocales) =>
-          function.call(positionalArgs: [locale, supportedLocales], namedArgs: const {}) as Locale?,
+      'RouteFactory': (HTFunction function) => (settings) =>
+          function.call(positionalArgs: [settings], namedArgs: const {})
+              as Route<dynamic>?,
+      'InitialRouteListFactory': (HTFunction function) => (initialRoute) =>
+          function.call(positionalArgs: [initialRoute], namedArgs: const {})
+              as List<Route<dynamic>>,
+      'TransitionBuilder': (HTFunction function) => (context, child) =>
+          function.call(positionalArgs: [context, child], namedArgs: const {})
+              as Widget,
+      'GenerateAppTitle': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as String,
+      'LocaleListResolutionCallback': (HTFunction function) =>
+          (locales, supportedLocales) => function.call(
+              positionalArgs: [locales, supportedLocales],
+              namedArgs: const {}) as Locale?,
+      'LocaleResolutionCallback': (HTFunction function) =>
+          (locale, supportedLocales) => function.call(
+              positionalArgs: [locale, supportedLocales],
+              namedArgs: const {}) as Locale?,
     };
   }
 }
@@ -125,7 +163,7 @@ extension CupertinoAppBinding on CupertinoApp {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoApp');
+        return const HTType('CupertinoApp');
       case 'navigatorKey':
         return navigatorKey;
       case 'home':
@@ -197,25 +235,37 @@ extension CupertinoAppBinding on CupertinoApp {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/bottom_tab_bar.g.dart b/lib/bindings/flutter/cupertino/bottom_tab_bar.g.dart
index a754e51..0a73270 100644
--- a/lib/bindings/flutter/cupertino/bottom_tab_bar.g.dart
+++ b/lib/bindings/flutter/cupertino/bottom_tab_bar.g.dart
@@ -4,8 +4,8 @@ import 'dart:ui';
 import 'package:flutter/widgets.dart';
 
 const _kDefaultTabBarInactiveColor = CupertinoColors.inactiveGray;
-const _kDefaultTabBarBorderColor =
-    CupertinoDynamicColor.withBrightness(color: Color(0x4C000000), darkColor: Color(0x29000000));
+const _kDefaultTabBarBorderColor = CupertinoDynamicColor.withBrightness(
+    color: Color(0x4C000000), darkColor: Color(0x29000000));
 
 class CupertinoTabBarAutoBinding extends HTExternalClass {
   CupertinoTabBarAutoBinding() : super('CupertinoTabBar');
@@ -18,18 +18,30 @@ class CupertinoTabBarAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             items: List<BottomNavigationBarItem>.from(namedArgs['items']),
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            currentIndex: namedArgs.containsKey('currentIndex') ? namedArgs['currentIndex'] : 0,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            inactiveColor:
-                namedArgs.containsKey('inactiveColor') ? namedArgs['inactiveColor'] : _kDefaultTabBarInactiveColor,
-            iconSize: namedArgs.containsKey('iconSize') ? namedArgs['iconSize'] : 30.0,
+            currentIndex: namedArgs.containsKey('currentIndex')
+                ? namedArgs['currentIndex']
+                : 0,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            inactiveColor: namedArgs.containsKey('inactiveColor')
+                ? namedArgs['inactiveColor']
+                : _kDefaultTabBarInactiveColor,
+            iconSize: namedArgs.containsKey('iconSize')
+                ? namedArgs['iconSize']
+                : 30.0,
             border: namedArgs.containsKey('border')
                 ? namedArgs['border']
                 : const Border(
-                    top: BorderSide(color: _kDefaultTabBarBorderColor, width: 0.0, style: BorderStyle.solid)));
+                    top: BorderSide(
+                        color: _kDefaultTabBarBorderColor,
+                        width: 0.0,
+                        style: BorderStyle.solid)));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -43,7 +55,7 @@ extension CupertinoTabBarBinding on CupertinoTabBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTabBar');
+        return const HTType('CupertinoTabBar');
       case 'items':
         return items;
       case 'onTap':
@@ -67,44 +79,71 @@ extension CupertinoTabBarBinding on CupertinoTabBar {
       case 'hashCode':
         return hashCode;
       case 'opaque':
-        return ({positionalArgs, namedArgs, typeArgs}) => opaque(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            opaque(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            items: namedArgs.containsKey('items') ? List<BottomNavigationBarItem>.from(namedArgs['items']) : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            inactiveColor: namedArgs.containsKey('inactiveColor') ? namedArgs['inactiveColor'] : null,
-            iconSize: namedArgs.containsKey('iconSize') ? namedArgs['iconSize'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : null,
-            currentIndex: namedArgs.containsKey('currentIndex') ? namedArgs['currentIndex'] : null,
+            items: namedArgs.containsKey('items')
+                ? List<BottomNavigationBarItem>.from(namedArgs['items'])
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            inactiveColor: namedArgs.containsKey('inactiveColor')
+                ? namedArgs['inactiveColor']
+                : null,
+            iconSize: namedArgs.containsKey('iconSize')
+                ? namedArgs['iconSize']
+                : null,
+            border:
+                namedArgs.containsKey('border') ? namedArgs['border'] : null,
+            currentIndex: namedArgs.containsKey('currentIndex')
+                ? namedArgs['currentIndex']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/button.g.dart b/lib/bindings/flutter/cupertino/button.g.dart
index aad6cab..142034d 100644
--- a/lib/bindings/flutter/cupertino/button.g.dart
+++ b/lib/bindings/flutter/cupertino/button.g.dart
@@ -13,35 +13,51 @@ class CupertinoButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             disabledColor: namedArgs.containsKey('disabledColor')
                 ? namedArgs['disabledColor']
                 : CupertinoColors.quaternarySystemFill,
-            minSize: namedArgs.containsKey('minSize') ? namedArgs['minSize'] : kMinInteractiveDimensionCupertino,
-            pressedOpacity: namedArgs.containsKey('pressedOpacity') ? namedArgs['pressedOpacity'] : 0.4,
+            minSize: namedArgs.containsKey('minSize')
+                ? namedArgs['minSize']
+                : kMinInteractiveDimensionCupertino,
+            pressedOpacity: namedArgs.containsKey('pressedOpacity')
+                ? namedArgs['pressedOpacity']
+                : 0.4,
             borderRadius: namedArgs.containsKey('borderRadius')
                 ? namedArgs['borderRadius']
                 : const BorderRadius.all(Radius.circular(8.0)),
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
             onPressed: namedArgs['onPressed']);
       case 'CupertinoButton.filled':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoButton.filled(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor')
-                ? namedArgs['disabledColor']
-                : CupertinoColors.quaternarySystemFill,
-            minSize: namedArgs.containsKey('minSize') ? namedArgs['minSize'] : kMinInteractiveDimensionCupertino,
-            pressedOpacity: namedArgs.containsKey('pressedOpacity') ? namedArgs['pressedOpacity'] : 0.4,
-            borderRadius: namedArgs.containsKey('borderRadius')
-                ? namedArgs['borderRadius']
-                : const BorderRadius.all(Radius.circular(8.0)),
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            onPressed: namedArgs['onPressed']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoButton.filled(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                padding: namedArgs.containsKey('padding')
+                    ? namedArgs['padding']
+                    : null,
+                disabledColor: namedArgs.containsKey('disabledColor')
+                    ? namedArgs['disabledColor']
+                    : CupertinoColors.quaternarySystemFill,
+                minSize: namedArgs.containsKey('minSize')
+                    ? namedArgs['minSize']
+                    : kMinInteractiveDimensionCupertino,
+                pressedOpacity: namedArgs.containsKey('pressedOpacity')
+                    ? namedArgs['pressedOpacity']
+                    : 0.4,
+                borderRadius: namedArgs.containsKey('borderRadius')
+                    ? namedArgs['borderRadius']
+                    : const BorderRadius.all(Radius.circular(8.0)),
+                alignment: namedArgs.containsKey('alignment')
+                    ? namedArgs['alignment']
+                    : Alignment.center,
+                onPressed: namedArgs['onPressed']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -52,7 +68,8 @@ class CupertinoButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -61,7 +78,7 @@ extension CupertinoButtonBinding on CupertinoButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoButton');
+        return const HTType('CupertinoButton');
       case 'child':
         return child;
       case 'padding':
@@ -89,29 +106,41 @@ extension CupertinoButtonBinding on CupertinoButton {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/colors.g.dart b/lib/bindings/flutter/cupertino/colors.g.dart
index 8b4da5e..5fc7986 100644
--- a/lib/bindings/flutter/cupertino/colors.g.dart
+++ b/lib/bindings/flutter/cupertino/colors.g.dart
@@ -94,7 +94,7 @@ class CupertinoColorsAutoBinding extends HTExternalClass {
       case 'CupertinoColors.link':
         return CupertinoColors.link;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -107,7 +107,9 @@ class CupertinoDynamicColorAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'CupertinoDynamicColor':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoDynamicColor(
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
             color: namedArgs['color'],
             darkColor: namedArgs['darkColor'],
             highContrastColor: namedArgs['highContrastColor'],
@@ -115,27 +117,35 @@ class CupertinoDynamicColorAutoBinding extends HTExternalClass {
             elevatedColor: namedArgs['elevatedColor'],
             darkElevatedColor: namedArgs['darkElevatedColor'],
             highContrastElevatedColor: namedArgs['highContrastElevatedColor'],
-            darkHighContrastElevatedColor: namedArgs['darkHighContrastElevatedColor']);
+            darkHighContrastElevatedColor:
+                namedArgs['darkHighContrastElevatedColor']);
       case 'CupertinoDynamicColor.withBrightnessAndContrast':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoDynamicColor.withBrightnessAndContrast(
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            color: namedArgs['color'],
-            darkColor: namedArgs['darkColor'],
-            highContrastColor: namedArgs['highContrastColor'],
-            darkHighContrastColor: namedArgs['darkHighContrastColor']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoDynamicColor.withBrightnessAndContrast(
+                debugLabel: namedArgs.containsKey('debugLabel')
+                    ? namedArgs['debugLabel']
+                    : null,
+                color: namedArgs['color'],
+                darkColor: namedArgs['darkColor'],
+                highContrastColor: namedArgs['highContrastColor'],
+                darkHighContrastColor: namedArgs['darkHighContrastColor']);
       case 'CupertinoDynamicColor.withBrightness':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoDynamicColor.withBrightness(
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            color: namedArgs['color'],
-            darkColor: namedArgs['darkColor']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoDynamicColor.withBrightness(
+                debugLabel: namedArgs.containsKey('debugLabel')
+                    ? namedArgs['debugLabel']
+                    : null,
+                color: namedArgs['color'],
+                darkColor: namedArgs['darkColor']);
       case 'CupertinoDynamicColor.resolve':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             CupertinoDynamicColor.resolve(positionalArgs[0], positionalArgs[1]);
       case 'CupertinoDynamicColor.maybeResolve':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            CupertinoDynamicColor.maybeResolve(positionalArgs[0], positionalArgs[1]);
+            CupertinoDynamicColor.maybeResolve(
+                positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -149,7 +159,7 @@ extension CupertinoDynamicColorBinding on CupertinoDynamicColor {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoDynamicColor');
+        return const HTType('CupertinoDynamicColor');
       case 'color':
         return color;
       case 'darkColor':
@@ -181,12 +191,16 @@ extension CupertinoDynamicColorBinding on CupertinoDynamicColor {
       case 'blue':
         return blue;
       case 'resolveFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveFrom(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            resolveFrom(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -194,19 +208,24 @@ extension CupertinoDynamicColorBinding on CupertinoDynamicColor {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'withAlpha':
-        return ({positionalArgs, namedArgs, typeArgs}) => withAlpha(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withAlpha(positionalArgs[0]);
       case 'withOpacity':
-        return ({positionalArgs, namedArgs, typeArgs}) => withOpacity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withOpacity(positionalArgs[0]);
       case 'withRed':
-        return ({positionalArgs, namedArgs, typeArgs}) => withRed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withRed(positionalArgs[0]);
       case 'withGreen':
-        return ({positionalArgs, namedArgs, typeArgs}) => withGreen(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withGreen(positionalArgs[0]);
       case 'withBlue':
-        return ({positionalArgs, namedArgs, typeArgs}) => withBlue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withBlue(positionalArgs[0]);
       case 'computeLuminance':
         return ({positionalArgs, namedArgs, typeArgs}) => computeLuminance();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/context_menu.g.dart b/lib/bindings/flutter/cupertino/context_menu.g.dart
index f42c5d6..3ca3e32 100644
--- a/lib/bindings/flutter/cupertino/context_menu.g.dart
+++ b/lib/bindings/flutter/cupertino/context_menu.g.dart
@@ -14,9 +14,11 @@ class CupertinoContextMenuAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             actions: List<Widget>.from(namedArgs['actions']),
             child: namedArgs['child'],
-            previewBuilder: namedArgs.containsKey('previewBuilder') ? namedArgs['previewBuilder'] : null);
+            previewBuilder: namedArgs.containsKey('previewBuilder')
+                ? namedArgs['previewBuilder']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,8 +29,10 @@ class CupertinoContextMenuAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ContextMenuPreviewBuilder': (HTFunction function) => (context, animation, child) =>
-          function.call(positionalArgs: [context, animation, child], namedArgs: const {}) as Widget,
+      'ContextMenuPreviewBuilder': (HTFunction function) =>
+          (context, animation, child) => function.call(
+              positionalArgs: [context, animation, child],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -37,7 +41,7 @@ extension CupertinoContextMenuBinding on CupertinoContextMenu {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoContextMenu');
+        return const HTType('CupertinoContextMenu');
       case 'child':
         return child;
       case 'actions':
@@ -55,25 +59,37 @@ extension CupertinoContextMenuBinding on CupertinoContextMenu {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/context_menu_action.g.dart b/lib/bindings/flutter/cupertino/context_menu_action.g.dart
index 2c946f6..07519e5 100644
--- a/lib/bindings/flutter/cupertino/context_menu_action.g.dart
+++ b/lib/bindings/flutter/cupertino/context_menu_action.g.dart
@@ -9,16 +9,25 @@ class CupertinoContextMenuActionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoContextMenuAction':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoContextMenuAction(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            isDefaultAction: namedArgs.containsKey('isDefaultAction') ? namedArgs['isDefaultAction'] : false,
-            isDestructiveAction:
-                namedArgs.containsKey('isDestructiveAction') ? namedArgs['isDestructiveAction'] : false,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            trailingIcon: namedArgs.containsKey('trailingIcon') ? namedArgs['trailingIcon'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoContextMenuAction(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                isDefaultAction: namedArgs.containsKey('isDefaultAction')
+                    ? namedArgs['isDefaultAction']
+                    : false,
+                isDestructiveAction:
+                    namedArgs.containsKey('isDestructiveAction')
+                        ? namedArgs['isDestructiveAction']
+                        : false,
+                onPressed: namedArgs.containsKey('onPressed')
+                    ? namedArgs['onPressed']
+                    : null,
+                trailingIcon: namedArgs.containsKey('trailingIcon')
+                    ? namedArgs['trailingIcon']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +38,8 @@ class CupertinoContextMenuActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -38,7 +48,7 @@ extension CupertinoContextMenuActionBinding on CupertinoContextMenuAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoContextMenuAction');
+        return const HTType('CupertinoContextMenuAction');
       case 'child':
         return child;
       case 'isDefaultAction':
@@ -60,25 +70,37 @@ extension CupertinoContextMenuActionBinding on CupertinoContextMenuAction {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/date_picker.g.dart b/lib/bindings/flutter/cupertino/date_picker.g.dart
index 147597c..47eae50 100644
--- a/lib/bindings/flutter/cupertino/date_picker.g.dart
+++ b/lib/bindings/flutter/cupertino/date_picker.g.dart
@@ -17,7 +17,7 @@ class CupertinoDatePickerModeAutoBinding extends HTExternalClass {
       case 'CupertinoDatePickerMode.dateAndTime':
         return CupertinoDatePickerMode.dateAndTime;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class CupertinoDatePickerModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoDatePickerMode');
+        return const HTType('CupertinoDatePickerMode');
       case 'index':
         return (instance as CupertinoDatePickerMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as CupertinoDatePickerMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as CupertinoDatePickerMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,7 +52,7 @@ class CupertinoTimerPickerModeAutoBinding extends HTExternalClass {
       case 'CupertinoTimerPickerMode.hms':
         return CupertinoTimerPickerMode.hms;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -59,13 +60,14 @@ class CupertinoTimerPickerModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTimerPickerMode');
+        return const HTType('CupertinoTimerPickerMode');
       case 'index':
         return (instance as CupertinoTimerPickerMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as CupertinoTimerPickerMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as CupertinoTimerPickerMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,18 +81,36 @@ class CupertinoDatePickerAutoBinding extends HTExternalClass {
       case 'CupertinoDatePicker':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoDatePicker(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : CupertinoDatePickerMode.dateAndTime,
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : CupertinoDatePickerMode.dateAndTime,
             onDateTimeChanged: namedArgs['onDateTimeChanged'],
-            initialDateTime: namedArgs.containsKey('initialDateTime') ? namedArgs['initialDateTime'] : null,
-            minimumDate: namedArgs.containsKey('minimumDate') ? namedArgs['minimumDate'] : null,
-            maximumDate: namedArgs.containsKey('maximumDate') ? namedArgs['maximumDate'] : null,
-            minimumYear: namedArgs.containsKey('minimumYear') ? namedArgs['minimumYear'] : 1,
-            maximumYear: namedArgs.containsKey('maximumYear') ? namedArgs['maximumYear'] : null,
-            minuteInterval: namedArgs.containsKey('minuteInterval') ? namedArgs['minuteInterval'] : 1,
-            use24hFormat: namedArgs.containsKey('use24hFormat') ? namedArgs['use24hFormat'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null);
+            initialDateTime: namedArgs.containsKey('initialDateTime')
+                ? namedArgs['initialDateTime']
+                : null,
+            minimumDate: namedArgs.containsKey('minimumDate')
+                ? namedArgs['minimumDate']
+                : null,
+            maximumDate: namedArgs.containsKey('maximumDate')
+                ? namedArgs['maximumDate']
+                : null,
+            minimumYear: namedArgs.containsKey('minimumYear')
+                ? namedArgs['minimumYear']
+                : 1,
+            maximumYear: namedArgs.containsKey('maximumYear')
+                ? namedArgs['maximumYear']
+                : null,
+            minuteInterval: namedArgs.containsKey('minuteInterval')
+                ? namedArgs['minuteInterval']
+                : 1,
+            use24hFormat: namedArgs.containsKey('use24hFormat')
+                ? namedArgs['use24hFormat']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -104,7 +124,7 @@ extension CupertinoDatePickerBinding on CupertinoDatePicker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoDatePicker');
+        return const HTType('CupertinoDatePicker');
       case 'mode':
         return mode;
       case 'initialDateTime':
@@ -136,25 +156,37 @@ extension CupertinoDatePickerBinding on CupertinoDatePicker {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -168,16 +200,27 @@ class CupertinoTimerPickerAutoBinding extends HTExternalClass {
       case 'CupertinoTimerPicker':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTimerPicker(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            mode: namedArgs.containsKey('mode') ? namedArgs['mode'] : CupertinoTimerPickerMode.hms,
-            initialTimerDuration:
-                namedArgs.containsKey('initialTimerDuration') ? namedArgs['initialTimerDuration'] : Duration.zero,
-            minuteInterval: namedArgs.containsKey('minuteInterval') ? namedArgs['minuteInterval'] : 1,
-            secondInterval: namedArgs.containsKey('secondInterval') ? namedArgs['secondInterval'] : 1,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
+            mode: namedArgs.containsKey('mode')
+                ? namedArgs['mode']
+                : CupertinoTimerPickerMode.hms,
+            initialTimerDuration: namedArgs.containsKey('initialTimerDuration')
+                ? namedArgs['initialTimerDuration']
+                : Duration.zero,
+            minuteInterval: namedArgs.containsKey('minuteInterval')
+                ? namedArgs['minuteInterval']
+                : 1,
+            secondInterval: namedArgs.containsKey('secondInterval')
+                ? namedArgs['secondInterval']
+                : 1,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
             onTimerDurationChanged: namedArgs['onTimerDurationChanged']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -191,7 +234,7 @@ extension CupertinoTimerPickerBinding on CupertinoTimerPicker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTimerPicker');
+        return const HTType('CupertinoTimerPicker');
       case 'mode':
         return mode;
       case 'initialTimerDuration':
@@ -217,25 +260,37 @@ extension CupertinoTimerPickerBinding on CupertinoTimerPicker {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/dialog.g.dart b/lib/bindings/flutter/cupertino/dialog.g.dart
index 79f9cb4..07f26c0 100644
--- a/lib/bindings/flutter/cupertino/dialog.g.dart
+++ b/lib/bindings/flutter/cupertino/dialog.g.dart
@@ -14,18 +14,27 @@ class CupertinoAlertDialogAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoAlertDialog(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            content: namedArgs.containsKey('content') ? namedArgs['content'] : null,
-            actions: namedArgs.containsKey('actions') ? List<Widget>.from(namedArgs['actions']) : const <Widget>[],
-            scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
+            content:
+                namedArgs.containsKey('content') ? namedArgs['content'] : null,
+            actions: namedArgs.containsKey('actions')
+                ? List<Widget>.from(namedArgs['actions'])
+                : const <Widget>[],
+            scrollController: namedArgs.containsKey('scrollController')
+                ? namedArgs['scrollController']
+                : null,
             actionScrollController:
-                namedArgs.containsKey('actionScrollController') ? namedArgs['actionScrollController'] : null,
-            insetAnimationDuration: namedArgs.containsKey('insetAnimationDuration')
-                ? namedArgs['insetAnimationDuration']
-                : const Duration(milliseconds: 100),
-            insetAnimationCurve:
-                namedArgs.containsKey('insetAnimationCurve') ? namedArgs['insetAnimationCurve'] : Curves.decelerate);
+                namedArgs.containsKey('actionScrollController')
+                    ? namedArgs['actionScrollController']
+                    : null,
+            insetAnimationDuration:
+                namedArgs.containsKey('insetAnimationDuration')
+                    ? namedArgs['insetAnimationDuration']
+                    : const Duration(milliseconds: 100),
+            insetAnimationCurve: namedArgs.containsKey('insetAnimationCurve')
+                ? namedArgs['insetAnimationCurve']
+                : Curves.decelerate);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -39,7 +48,7 @@ extension CupertinoAlertDialogBinding on CupertinoAlertDialog {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoAlertDialog');
+        return const HTType('CupertinoAlertDialog');
       case 'title':
         return title;
       case 'content':
@@ -59,31 +68,44 @@ extension CupertinoAlertDialogBinding on CupertinoAlertDialog {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -97,10 +119,12 @@ class CupertinoPopupSurfaceAutoBinding extends HTExternalClass {
       case 'CupertinoPopupSurface':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoPopupSurface(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            isSurfacePainted: namedArgs.containsKey('isSurfacePainted') ? namedArgs['isSurfacePainted'] : true,
+            isSurfacePainted: namedArgs.containsKey('isSurfacePainted')
+                ? namedArgs['isSurfacePainted']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -114,7 +138,7 @@ extension CupertinoPopupSurfaceBinding on CupertinoPopupSurface {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoPopupSurface');
+        return const HTType('CupertinoPopupSurface');
       case 'isSurfacePainted':
         return isSurfacePainted;
       case 'child':
@@ -124,31 +148,44 @@ extension CupertinoPopupSurfaceBinding on CupertinoPopupSurface {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -162,14 +199,21 @@ class CupertinoDialogActionAutoBinding extends HTExternalClass {
       case 'CupertinoDialogAction':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoDialogAction(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            isDefaultAction: namedArgs.containsKey('isDefaultAction') ? namedArgs['isDefaultAction'] : false,
-            isDestructiveAction:
-                namedArgs.containsKey('isDestructiveAction') ? namedArgs['isDestructiveAction'] : false,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
+            onPressed: namedArgs.containsKey('onPressed')
+                ? namedArgs['onPressed']
+                : null,
+            isDefaultAction: namedArgs.containsKey('isDefaultAction')
+                ? namedArgs['isDefaultAction']
+                : false,
+            isDestructiveAction: namedArgs.containsKey('isDestructiveAction')
+                ? namedArgs['isDestructiveAction']
+                : false,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -180,7 +224,8 @@ class CupertinoDialogActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -189,7 +234,7 @@ extension CupertinoDialogActionBinding on CupertinoDialogAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoDialogAction');
+        return const HTType('CupertinoDialogAction');
       case 'onPressed':
         return onPressed;
       case 'isDefaultAction':
@@ -207,31 +252,44 @@ extension CupertinoDialogActionBinding on CupertinoDialogAction {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/form_row.g.dart b/lib/bindings/flutter/cupertino/form_row.g.dart
index 7b201ad..6fbf61b 100644
--- a/lib/bindings/flutter/cupertino/form_row.g.dart
+++ b/lib/bindings/flutter/cupertino/form_row.g.dart
@@ -12,12 +12,15 @@ class CupertinoFormRowAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoFormRow(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            helper: namedArgs.containsKey('helper') ? namedArgs['helper'] : null,
+            prefix:
+                namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            helper:
+                namedArgs.containsKey('helper') ? namedArgs['helper'] : null,
             error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +34,7 @@ extension CupertinoFormRowBinding on CupertinoFormRow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoFormRow');
+        return const HTType('CupertinoFormRow');
       case 'prefix':
         return prefix;
       case 'padding':
@@ -47,31 +50,44 @@ extension CupertinoFormRowBinding on CupertinoFormRow {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/form_section.g.dart b/lib/bindings/flutter/cupertino/form_section.g.dart
index cbbd09f..4ac54d3 100644
--- a/lib/bindings/flutter/cupertino/form_section.g.dart
+++ b/lib/bindings/flutter/cupertino/form_section.g.dart
@@ -2,7 +2,8 @@ import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/widgets.dart';
 
-const _kDefaultInsetGroupedRowsMargin = EdgeInsetsDirectional.fromSTEB(20.0, 0.0, 20.0, 10.0);
+const _kDefaultInsetGroupedRowsMargin =
+    EdgeInsetsDirectional.fromSTEB(20.0, 0.0, 20.0, 10.0);
 
 class CupertinoFormSectionAutoBinding extends HTExternalClass {
   CupertinoFormSectionAutoBinding() : super('CupertinoFormSection');
@@ -13,29 +14,49 @@ class CupertinoFormSectionAutoBinding extends HTExternalClass {
       case 'CupertinoFormSection':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoFormSection(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            footer: namedArgs.containsKey('footer') ? namedArgs['footer'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : EdgeInsets.zero,
+            header:
+                namedArgs.containsKey('header') ? namedArgs['header'] : null,
+            footer:
+                namedArgs.containsKey('footer') ? namedArgs['footer'] : null,
+            margin: namedArgs.containsKey('margin')
+                ? namedArgs['margin']
+                : EdgeInsets.zero,
             backgroundColor: namedArgs.containsKey('backgroundColor')
                 ? namedArgs['backgroundColor']
                 : CupertinoColors.systemGroupedBackground,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             children: List<Widget>.from(namedArgs['children']));
       case 'CupertinoFormSection.insetGrouped':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoFormSection.insetGrouped(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            footer: namedArgs.containsKey('footer') ? namedArgs['footer'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : _kDefaultInsetGroupedRowsMargin,
-            backgroundColor: namedArgs.containsKey('backgroundColor')
-                ? namedArgs['backgroundColor']
-                : CupertinoColors.systemGroupedBackground,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            children: List<Widget>.from(namedArgs['children']));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoFormSection
+                .insetGrouped(
+                    key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                    header: namedArgs.containsKey('header')
+                        ? namedArgs['header']
+                        : null,
+                    footer: namedArgs.containsKey('footer')
+                        ? namedArgs['footer']
+                        : null,
+                    margin: namedArgs.containsKey('margin')
+                        ? namedArgs['margin']
+                        : _kDefaultInsetGroupedRowsMargin,
+                    backgroundColor: namedArgs.containsKey('backgroundColor')
+                        ? namedArgs['backgroundColor']
+                        : CupertinoColors.systemGroupedBackground,
+                    decoration: namedArgs.containsKey('decoration')
+                        ? namedArgs['decoration']
+                        : null,
+                    clipBehavior: namedArgs.containsKey('clipBehavior')
+                        ? namedArgs['clipBehavior']
+                        : Clip.none,
+                    children: List<Widget>.from(namedArgs['children']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -49,7 +70,7 @@ extension CupertinoFormSectionBinding on CupertinoFormSection {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoFormSection');
+        return const HTType('CupertinoFormSection');
       case 'header':
         return header;
       case 'footer':
@@ -69,31 +90,44 @@ extension CupertinoFormSectionBinding on CupertinoFormSection {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/icon_theme_data.g.dart b/lib/bindings/flutter/cupertino/icon_theme_data.g.dart
index a34c3f3..3434de7 100644
--- a/lib/bindings/flutter/cupertino/icon_theme_data.g.dart
+++ b/lib/bindings/flutter/cupertino/icon_theme_data.g.dart
@@ -10,12 +10,16 @@ class CupertinoIconThemeDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoIconThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoIconThemeData(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            opacity: namedArgs.containsKey('opacity') ? namedArgs['opacity'] : null,
-            size: namedArgs.containsKey('size') ? namedArgs['size'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoIconThemeData(
+                color:
+                    namedArgs.containsKey('color') ? namedArgs['color'] : null,
+                opacity: namedArgs.containsKey('opacity')
+                    ? namedArgs['opacity']
+                    : null,
+                size: namedArgs.containsKey('size') ? namedArgs['size'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +33,7 @@ extension CupertinoIconThemeDataBinding on CupertinoIconThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoIconThemeData');
+        return const HTType('CupertinoIconThemeData');
       case 'color':
         return color;
       case 'size':
@@ -41,27 +45,33 @@ extension CupertinoIconThemeDataBinding on CupertinoIconThemeData {
       case 'hashCode':
         return hashCode;
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            opacity: namedArgs.containsKey('opacity') ? namedArgs['opacity'] : null,
+            opacity:
+                namedArgs.containsKey('opacity') ? namedArgs['opacity'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => merge(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            merge(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/icons.g.dart b/lib/bindings/flutter/cupertino/icons.g.dart
index 4059418..4cb0019 100644
--- a/lib/bindings/flutter/cupertino/icons.g.dart
+++ b/lib/bindings/flutter/cupertino/icons.g.dart
@@ -2656,7 +2656,7 @@ class CupertinoIconsAutoBinding extends HTExternalClass {
       case 'CupertinoIcons.zzz':
         return CupertinoIcons.zzz;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/interface_level.g.dart b/lib/bindings/flutter/cupertino/interface_level.g.dart
index 93bc41e..418c079 100644
--- a/lib/bindings/flutter/cupertino/interface_level.g.dart
+++ b/lib/bindings/flutter/cupertino/interface_level.g.dart
@@ -3,7 +3,8 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 
 class CupertinoUserInterfaceLevelDataAutoBinding extends HTExternalClass {
-  CupertinoUserInterfaceLevelDataAutoBinding() : super('CupertinoUserInterfaceLevelData');
+  CupertinoUserInterfaceLevelDataAutoBinding()
+      : super('CupertinoUserInterfaceLevelData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
@@ -15,7 +16,7 @@ class CupertinoUserInterfaceLevelDataAutoBinding extends HTExternalClass {
       case 'CupertinoUserInterfaceLevelData.elevated':
         return CupertinoUserInterfaceLevelData.elevated;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,34 +24,39 @@ class CupertinoUserInterfaceLevelDataAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoUserInterfaceLevelData');
+        return const HTType('CupertinoUserInterfaceLevelData');
       case 'index':
         return (instance as CupertinoUserInterfaceLevelData).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as CupertinoUserInterfaceLevelData).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as CupertinoUserInterfaceLevelData).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class CupertinoUserInterfaceLevelAutoBinding extends HTExternalClass {
-  CupertinoUserInterfaceLevelAutoBinding() : super('CupertinoUserInterfaceLevel');
+  CupertinoUserInterfaceLevelAutoBinding()
+      : super('CupertinoUserInterfaceLevel');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoUserInterfaceLevel':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoUserInterfaceLevel(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            data: namedArgs['data'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoUserInterfaceLevel(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                data: namedArgs['data'],
+                child: namedArgs['child']);
       case 'CupertinoUserInterfaceLevel.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoUserInterfaceLevel.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoUserInterfaceLevel.of(positionalArgs[0]);
       case 'CupertinoUserInterfaceLevel.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoUserInterfaceLevel.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoUserInterfaceLevel.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -64,7 +70,7 @@ extension CupertinoUserInterfaceLevelBinding on CupertinoUserInterfaceLevel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoUserInterfaceLevel');
+        return const HTType('CupertinoUserInterfaceLevel');
       case 'child':
         return child;
       case 'key':
@@ -72,31 +78,44 @@ extension CupertinoUserInterfaceLevelBinding on CupertinoUserInterfaceLevel {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/localizations.g.dart b/lib/bindings/flutter/cupertino/localizations.g.dart
index 56eccac..ce0ce29 100644
--- a/lib/bindings/flutter/cupertino/localizations.g.dart
+++ b/lib/bindings/flutter/cupertino/localizations.g.dart
@@ -18,7 +18,7 @@ class DatePickerDateTimeOrderAutoBinding extends HTExternalClass {
       case 'DatePickerDateTimeOrder.dayPeriod_time_date':
         return DatePickerDateTimeOrder.dayPeriod_time_date;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class DatePickerDateTimeOrderAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DatePickerDateTimeOrder');
+        return const HTType('DatePickerDateTimeOrder');
       case 'index':
         return (instance as DatePickerDateTimeOrder).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DatePickerDateTimeOrder).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DatePickerDateTimeOrder).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,7 +55,7 @@ class DatePickerDateOrderAutoBinding extends HTExternalClass {
       case 'DatePickerDateOrder.ydm':
         return DatePickerDateOrder.ydm;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,13 +63,14 @@ class DatePickerDateOrderAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DatePickerDateOrder');
+        return const HTType('DatePickerDateOrder');
       case 'index':
         return (instance as DatePickerDateOrder).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DatePickerDateOrder).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DatePickerDateOrder).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -80,27 +82,31 @@ class CupertinoLocalizationsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoLocalizations.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoLocalizations.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoLocalizations.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DefaultCupertinoLocalizationsAutoBinding extends HTExternalClass {
-  DefaultCupertinoLocalizationsAutoBinding() : super('DefaultCupertinoLocalizations');
+  DefaultCupertinoLocalizationsAutoBinding()
+      : super('DefaultCupertinoLocalizations');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DefaultCupertinoLocalizations':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultCupertinoLocalizations();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultCupertinoLocalizations();
       case 'DefaultCupertinoLocalizations.load':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultCupertinoLocalizations.load(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultCupertinoLocalizations.load(positionalArgs[0]);
       case 'DefaultCupertinoLocalizations.delegate':
         return DefaultCupertinoLocalizations.delegate;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,11 +116,12 @@ class DefaultCupertinoLocalizationsAutoBinding extends HTExternalClass {
   }
 }
 
-extension DefaultCupertinoLocalizationsBinding on DefaultCupertinoLocalizations {
+extension DefaultCupertinoLocalizationsBinding
+    on DefaultCupertinoLocalizations {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultCupertinoLocalizations');
+        return const HTType('DefaultCupertinoLocalizations');
       case 'datePickerDateOrder':
         return datePickerDateOrder;
       case 'datePickerDateTimeOrder':
@@ -146,39 +153,57 @@ extension DefaultCupertinoLocalizationsBinding on DefaultCupertinoLocalizations
       case 'modalBarrierDismissLabel':
         return modalBarrierDismissLabel;
       case 'datePickerYear':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerYear(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerYear(positionalArgs[0]);
       case 'datePickerMonth':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerMonth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerMonth(positionalArgs[0]);
       case 'datePickerDayOfMonth':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerDayOfMonth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerDayOfMonth(positionalArgs[0]);
       case 'datePickerHour':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerHour(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerHour(positionalArgs[0]);
       case 'datePickerHourSemanticsLabel':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerHourSemanticsLabel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerHourSemanticsLabel(positionalArgs[0]);
       case 'datePickerMinute':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerMinute(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerMinute(positionalArgs[0]);
       case 'datePickerMinuteSemanticsLabel':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerMinuteSemanticsLabel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerMinuteSemanticsLabel(positionalArgs[0]);
       case 'datePickerMediumDate':
-        return ({positionalArgs, namedArgs, typeArgs}) => datePickerMediumDate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            datePickerMediumDate(positionalArgs[0]);
       case 'tabSemanticsLabel':
         return ({positionalArgs, namedArgs, typeArgs}) => tabSemanticsLabel(
-            tabIndex: namedArgs.containsKey('tabIndex') ? namedArgs['tabIndex'] : null,
-            tabCount: namedArgs.containsKey('tabCount') ? namedArgs['tabCount'] : null);
+            tabIndex: namedArgs.containsKey('tabIndex')
+                ? namedArgs['tabIndex']
+                : null,
+            tabCount: namedArgs.containsKey('tabCount')
+                ? namedArgs['tabCount']
+                : null);
       case 'timerPickerHour':
-        return ({positionalArgs, namedArgs, typeArgs}) => timerPickerHour(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timerPickerHour(positionalArgs[0]);
       case 'timerPickerMinute':
-        return ({positionalArgs, namedArgs, typeArgs}) => timerPickerMinute(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timerPickerMinute(positionalArgs[0]);
       case 'timerPickerSecond':
-        return ({positionalArgs, namedArgs, typeArgs}) => timerPickerSecond(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timerPickerSecond(positionalArgs[0]);
       case 'timerPickerHourLabel':
-        return ({positionalArgs, namedArgs, typeArgs}) => timerPickerHourLabel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timerPickerHourLabel(positionalArgs[0]);
       case 'timerPickerMinuteLabel':
-        return ({positionalArgs, namedArgs, typeArgs}) => timerPickerMinuteLabel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timerPickerMinuteLabel(positionalArgs[0]);
       case 'timerPickerSecondLabel':
-        return ({positionalArgs, namedArgs, typeArgs}) => timerPickerSecondLabel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timerPickerSecondLabel(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/nav_bar.g.dart b/lib/bindings/flutter/cupertino/nav_bar.g.dart
index c1c307b..8397a2d 100644
--- a/lib/bindings/flutter/cupertino/nav_bar.g.dart
+++ b/lib/bindings/flutter/cupertino/nav_bar.g.dart
@@ -6,8 +6,11 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 
 const _kDefaultNavBarBorderColor = Color(0x4D000000);
-const _kDefaultNavBarBorder =
-    Border(bottom: BorderSide(color: _kDefaultNavBarBorderColor, width: 0.0, style: BorderStyle.solid));
+const _kDefaultNavBarBorder = Border(
+    bottom: BorderSide(
+        color: _kDefaultNavBarBorderColor,
+        width: 0.0,
+        style: BorderStyle.solid));
 const _defaultHeroTag = _HeroTag(null);
 
 @immutable
@@ -15,7 +18,8 @@ class _HeroTag {
   const _HeroTag(this.navigator);
   final NavigatorState? navigator;
   @override
-  String toString() => 'Default Hero tag for Cupertino navigation bars with navigator $navigator';
+  String toString() =>
+      'Default Hero tag for Cupertino navigation bars with navigator $navigator';
   @override
   bool operator ==(Object other) {
     if (identical(this, other)) {
@@ -42,23 +46,44 @@ class CupertinoNavigationBarAutoBinding extends HTExternalClass {
       case 'CupertinoNavigationBar':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoNavigationBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
             automaticallyImplyLeading:
-                namedArgs.containsKey('automaticallyImplyLeading') ? namedArgs['automaticallyImplyLeading'] : true,
+                namedArgs.containsKey('automaticallyImplyLeading')
+                    ? namedArgs['automaticallyImplyLeading']
+                    : true,
             automaticallyImplyMiddle:
-                namedArgs.containsKey('automaticallyImplyMiddle') ? namedArgs['automaticallyImplyMiddle'] : true,
-            previousPageTitle: namedArgs.containsKey('previousPageTitle') ? namedArgs['previousPageTitle'] : null,
-            middle: namedArgs.containsKey('middle') ? namedArgs['middle'] : null,
-            trailing: namedArgs.containsKey('trailing') ? namedArgs['trailing'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : _kDefaultNavBarBorder,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+                namedArgs.containsKey('automaticallyImplyMiddle')
+                    ? namedArgs['automaticallyImplyMiddle']
+                    : true,
+            previousPageTitle: namedArgs.containsKey('previousPageTitle')
+                ? namedArgs['previousPageTitle']
+                : null,
+            middle:
+                namedArgs.containsKey('middle') ? namedArgs['middle'] : null,
+            trailing: namedArgs.containsKey('trailing')
+                ? namedArgs['trailing']
+                : null,
+            border: namedArgs.containsKey('border')
+                ? namedArgs['border']
+                : _kDefaultNavBarBorder,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             transitionBetweenRoutes:
-                namedArgs.containsKey('transitionBetweenRoutes') ? namedArgs['transitionBetweenRoutes'] : true,
-            heroTag: namedArgs.containsKey('heroTag') ? namedArgs['heroTag'] : _defaultHeroTag);
+                namedArgs.containsKey('transitionBetweenRoutes')
+                    ? namedArgs['transitionBetweenRoutes']
+                    : true,
+            heroTag: namedArgs.containsKey('heroTag')
+                ? namedArgs['heroTag']
+                : _defaultHeroTag);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -72,7 +97,7 @@ extension CupertinoNavigationBarBinding on CupertinoNavigationBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoNavigationBar');
+        return const HTType('CupertinoNavigationBar');
       case 'leading':
         return leading;
       case 'automaticallyImplyLeading':
@@ -104,7 +129,8 @@ extension CupertinoNavigationBarBinding on CupertinoNavigationBar {
       case 'hashCode':
         return hashCode;
       case 'shouldFullyObstruct':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldFullyObstruct(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldFullyObstruct(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'createElement':
@@ -112,31 +138,44 @@ extension CupertinoNavigationBarBinding on CupertinoNavigationBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class CupertinoSliverNavigationBarAutoBinding extends HTExternalClass {
-  CupertinoSliverNavigationBarAutoBinding() : super('CupertinoSliverNavigationBar');
+  CupertinoSliverNavigationBarAutoBinding()
+      : super('CupertinoSliverNavigationBar');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
@@ -144,25 +183,50 @@ class CupertinoSliverNavigationBarAutoBinding extends HTExternalClass {
       case 'CupertinoSliverNavigationBar':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoSliverNavigationBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            largeTitle: namedArgs.containsKey('largeTitle') ? namedArgs['largeTitle'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            largeTitle: namedArgs.containsKey('largeTitle')
+                ? namedArgs['largeTitle']
+                : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
             automaticallyImplyLeading:
-                namedArgs.containsKey('automaticallyImplyLeading') ? namedArgs['automaticallyImplyLeading'] : true,
+                namedArgs.containsKey('automaticallyImplyLeading')
+                    ? namedArgs['automaticallyImplyLeading']
+                    : true,
             automaticallyImplyTitle:
-                namedArgs.containsKey('automaticallyImplyTitle') ? namedArgs['automaticallyImplyTitle'] : true,
-            previousPageTitle: namedArgs.containsKey('previousPageTitle') ? namedArgs['previousPageTitle'] : null,
-            middle: namedArgs.containsKey('middle') ? namedArgs['middle'] : null,
-            trailing: namedArgs.containsKey('trailing') ? namedArgs['trailing'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : _kDefaultNavBarBorder,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+                namedArgs.containsKey('automaticallyImplyTitle')
+                    ? namedArgs['automaticallyImplyTitle']
+                    : true,
+            previousPageTitle: namedArgs.containsKey('previousPageTitle')
+                ? namedArgs['previousPageTitle']
+                : null,
+            middle:
+                namedArgs.containsKey('middle') ? namedArgs['middle'] : null,
+            trailing: namedArgs.containsKey('trailing')
+                ? namedArgs['trailing']
+                : null,
+            border: namedArgs.containsKey('border')
+                ? namedArgs['border']
+                : _kDefaultNavBarBorder,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             transitionBetweenRoutes:
-                namedArgs.containsKey('transitionBetweenRoutes') ? namedArgs['transitionBetweenRoutes'] : true,
-            heroTag: namedArgs.containsKey('heroTag') ? namedArgs['heroTag'] : _defaultHeroTag,
-            stretch: namedArgs.containsKey('stretch') ? namedArgs['stretch'] : false);
+                namedArgs.containsKey('transitionBetweenRoutes')
+                    ? namedArgs['transitionBetweenRoutes']
+                    : true,
+            heroTag: namedArgs.containsKey('heroTag')
+                ? namedArgs['heroTag']
+                : _defaultHeroTag,
+            stretch: namedArgs.containsKey('stretch')
+                ? namedArgs['stretch']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -176,7 +240,7 @@ extension CupertinoSliverNavigationBarBinding on CupertinoSliverNavigationBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoSliverNavigationBar');
+        return const HTType('CupertinoSliverNavigationBar');
       case 'largeTitle':
         return largeTitle;
       case 'leading':
@@ -218,43 +282,62 @@ extension CupertinoSliverNavigationBarBinding on CupertinoSliverNavigationBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class CupertinoNavigationBarBackButtonAutoBinding extends HTExternalClass {
-  CupertinoNavigationBarBackButtonAutoBinding() : super('CupertinoNavigationBarBackButton');
+  CupertinoNavigationBarBackButtonAutoBinding()
+      : super('CupertinoNavigationBarBackButton');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoNavigationBarBackButton':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoNavigationBarBackButton(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            previousPageTitle: namedArgs.containsKey('previousPageTitle') ? namedArgs['previousPageTitle'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoNavigationBarBackButton(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                color:
+                    namedArgs.containsKey('color') ? namedArgs['color'] : null,
+                previousPageTitle: namedArgs.containsKey('previousPageTitle')
+                    ? namedArgs['previousPageTitle']
+                    : null,
+                onPressed: namedArgs.containsKey('onPressed')
+                    ? namedArgs['onPressed']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -265,16 +348,18 @@ class CupertinoNavigationBarBackButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension CupertinoNavigationBarBackButtonBinding on CupertinoNavigationBarBackButton {
+extension CupertinoNavigationBarBackButtonBinding
+    on CupertinoNavigationBarBackButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoNavigationBarBackButton');
+        return const HTType('CupertinoNavigationBarBackButton');
       case 'color':
         return color;
       case 'previousPageTitle':
@@ -286,31 +371,44 @@ extension CupertinoNavigationBarBackButtonBinding on CupertinoNavigationBarBackB
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/page_scaffold.g.dart b/lib/bindings/flutter/cupertino/page_scaffold.g.dart
index 4adabdd..d59524f 100644
--- a/lib/bindings/flutter/cupertino/page_scaffold.g.dart
+++ b/lib/bindings/flutter/cupertino/page_scaffold.g.dart
@@ -11,13 +11,19 @@ class CupertinoPageScaffoldAutoBinding extends HTExternalClass {
       case 'CupertinoPageScaffold':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoPageScaffold(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            navigationBar: namedArgs.containsKey('navigationBar') ? namedArgs['navigationBar'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
+            navigationBar: namedArgs.containsKey('navigationBar')
+                ? namedArgs['navigationBar']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
             resizeToAvoidBottomInset:
-                namedArgs.containsKey('resizeToAvoidBottomInset') ? namedArgs['resizeToAvoidBottomInset'] : true,
+                namedArgs.containsKey('resizeToAvoidBottomInset')
+                    ? namedArgs['resizeToAvoidBottomInset']
+                    : true,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +37,7 @@ extension CupertinoPageScaffoldBinding on CupertinoPageScaffold {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoPageScaffold');
+        return const HTType('CupertinoPageScaffold');
       case 'navigationBar':
         return navigationBar;
       case 'child':
@@ -51,25 +57,37 @@ extension CupertinoPageScaffoldBinding on CupertinoPageScaffold {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/picker.g.dart b/lib/bindings/flutter/cupertino/picker.g.dart
index df53de6..16508ff 100644
--- a/lib/bindings/flutter/cupertino/picker.g.dart
+++ b/lib/bindings/flutter/cupertino/picker.g.dart
@@ -16,39 +16,71 @@ class CupertinoPickerAutoBinding extends HTExternalClass {
       case 'CupertinoPicker':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoPicker(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            diameterRatio: namedArgs.containsKey('diameterRatio') ? namedArgs['diameterRatio'] : _kDefaultDiameterRatio,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            offAxisFraction: namedArgs.containsKey('offAxisFraction') ? namedArgs['offAxisFraction'] : 0.0,
-            useMagnifier: namedArgs.containsKey('useMagnifier') ? namedArgs['useMagnifier'] : false,
-            magnification: namedArgs.containsKey('magnification') ? namedArgs['magnification'] : 1.0,
-            scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
-            squeeze: namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : _kSqueeze,
+            diameterRatio: namedArgs.containsKey('diameterRatio')
+                ? namedArgs['diameterRatio']
+                : _kDefaultDiameterRatio,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            offAxisFraction: namedArgs.containsKey('offAxisFraction')
+                ? namedArgs['offAxisFraction']
+                : 0.0,
+            useMagnifier: namedArgs.containsKey('useMagnifier')
+                ? namedArgs['useMagnifier']
+                : false,
+            magnification: namedArgs.containsKey('magnification')
+                ? namedArgs['magnification']
+                : 1.0,
+            scrollController: namedArgs.containsKey('scrollController')
+                ? namedArgs['scrollController']
+                : null,
+            squeeze: namedArgs.containsKey('squeeze')
+                ? namedArgs['squeeze']
+                : _kSqueeze,
             itemExtent: namedArgs['itemExtent'],
             onSelectedItemChanged: namedArgs['onSelectedItemChanged'],
             selectionOverlay: namedArgs.containsKey('selectionOverlay')
                 ? namedArgs['selectionOverlay']
                 : const CupertinoPickerDefaultSelectionOverlay(),
-            looping: namedArgs.containsKey('looping') ? namedArgs['looping'] : false,
+            looping:
+                namedArgs.containsKey('looping') ? namedArgs['looping'] : false,
             children: List<Widget>.from(namedArgs['children']));
       case 'CupertinoPicker.builder':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoPicker.builder(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            diameterRatio: namedArgs.containsKey('diameterRatio') ? namedArgs['diameterRatio'] : _kDefaultDiameterRatio,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            offAxisFraction: namedArgs.containsKey('offAxisFraction') ? namedArgs['offAxisFraction'] : 0.0,
-            useMagnifier: namedArgs.containsKey('useMagnifier') ? namedArgs['useMagnifier'] : false,
-            magnification: namedArgs.containsKey('magnification') ? namedArgs['magnification'] : 1.0,
-            scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
-            squeeze: namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : _kSqueeze,
-            itemExtent: namedArgs['itemExtent'],
-            onSelectedItemChanged: namedArgs['onSelectedItemChanged'],
-            itemBuilder: namedArgs['itemBuilder'],
-            childCount: namedArgs.containsKey('childCount') ? namedArgs['childCount'] : null,
-            selectionOverlay: namedArgs.containsKey('selectionOverlay')
-                ? namedArgs['selectionOverlay']
-                : const CupertinoPickerDefaultSelectionOverlay());
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoPicker.builder(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                diameterRatio: namedArgs.containsKey('diameterRatio')
+                    ? namedArgs['diameterRatio']
+                    : _kDefaultDiameterRatio,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                offAxisFraction: namedArgs.containsKey('offAxisFraction')
+                    ? namedArgs['offAxisFraction']
+                    : 0.0,
+                useMagnifier: namedArgs.containsKey('useMagnifier')
+                    ? namedArgs['useMagnifier']
+                    : false,
+                magnification: namedArgs.containsKey('magnification')
+                    ? namedArgs['magnification']
+                    : 1.0,
+                scrollController: namedArgs.containsKey('scrollController')
+                    ? namedArgs['scrollController']
+                    : null,
+                squeeze: namedArgs.containsKey('squeeze')
+                    ? namedArgs['squeeze']
+                    : _kSqueeze,
+                itemExtent: namedArgs['itemExtent'],
+                onSelectedItemChanged: namedArgs['onSelectedItemChanged'],
+                itemBuilder: namedArgs['itemBuilder'],
+                childCount: namedArgs.containsKey('childCount')
+                    ? namedArgs['childCount']
+                    : null,
+                selectionOverlay: namedArgs.containsKey('selectionOverlay')
+                    ? namedArgs['selectionOverlay']
+                    : const CupertinoPickerDefaultSelectionOverlay());
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -59,8 +91,10 @@ class CupertinoPickerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'NullableIndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget?,
+      'NullableIndexedWidgetBuilder': (HTFunction function) => (context,
+              index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget?,
     };
   }
 }
@@ -69,7 +103,7 @@ extension CupertinoPickerBinding on CupertinoPicker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoPicker');
+        return const HTType('CupertinoPicker');
       case 'diameterRatio':
         return diameterRatio;
       case 'backgroundColor':
@@ -103,44 +137,64 @@ extension CupertinoPickerBinding on CupertinoPicker {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
-class CupertinoPickerDefaultSelectionOverlayAutoBinding extends HTExternalClass {
-  CupertinoPickerDefaultSelectionOverlayAutoBinding() : super('CupertinoPickerDefaultSelectionOverlay');
+class CupertinoPickerDefaultSelectionOverlayAutoBinding
+    extends HTExternalClass {
+  CupertinoPickerDefaultSelectionOverlayAutoBinding()
+      : super('CupertinoPickerDefaultSelectionOverlay');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoPickerDefaultSelectionOverlay':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoPickerDefaultSelectionOverlay(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            background:
-                namedArgs.containsKey('background') ? namedArgs['background'] : CupertinoColors.tertiarySystemFill,
-            capLeftEdge: namedArgs.containsKey('capLeftEdge') ? namedArgs['capLeftEdge'] : true,
-            capRightEdge: namedArgs.containsKey('capRightEdge') ? namedArgs['capRightEdge'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoPickerDefaultSelectionOverlay(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                background: namedArgs.containsKey('background')
+                    ? namedArgs['background']
+                    : CupertinoColors.tertiarySystemFill,
+                capLeftEdge: namedArgs.containsKey('capLeftEdge')
+                    ? namedArgs['capLeftEdge']
+                    : true,
+                capRightEdge: namedArgs.containsKey('capRightEdge')
+                    ? namedArgs['capRightEdge']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -150,11 +204,12 @@ class CupertinoPickerDefaultSelectionOverlayAutoBinding extends HTExternalClass
   }
 }
 
-extension CupertinoPickerDefaultSelectionOverlayBinding on CupertinoPickerDefaultSelectionOverlay {
+extension CupertinoPickerDefaultSelectionOverlayBinding
+    on CupertinoPickerDefaultSelectionOverlay {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoPickerDefaultSelectionOverlay');
+        return const HTType('CupertinoPickerDefaultSelectionOverlay');
       case 'capLeftEdge':
         return capLeftEdge;
       case 'capRightEdge':
@@ -166,31 +221,44 @@ extension CupertinoPickerDefaultSelectionOverlayBinding on CupertinoPickerDefaul
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/refresh.g.dart b/lib/bindings/flutter/cupertino/refresh.g.dart
index dee6f00..29883a1 100644
--- a/lib/bindings/flutter/cupertino/refresh.g.dart
+++ b/lib/bindings/flutter/cupertino/refresh.g.dart
@@ -22,7 +22,7 @@ class RefreshIndicatorModeAutoBinding extends HTExternalClass {
       case 'RefreshIndicatorMode.done':
         return RefreshIndicatorMode.done;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,40 +30,57 @@ class RefreshIndicatorModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RefreshIndicatorMode');
+        return const HTType('RefreshIndicatorMode');
       case 'index':
         return (instance as RefreshIndicatorMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as RefreshIndicatorMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as RefreshIndicatorMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class CupertinoSliverRefreshControlAutoBinding extends HTExternalClass {
-  CupertinoSliverRefreshControlAutoBinding() : super('CupertinoSliverRefreshControl');
+  CupertinoSliverRefreshControlAutoBinding()
+      : super('CupertinoSliverRefreshControl');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoSliverRefreshControl':
-        const buildRefreshIndicator = CupertinoSliverRefreshControl.buildRefreshIndicator;
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoSliverRefreshControl(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            refreshTriggerPullDistance: namedArgs.containsKey('refreshTriggerPullDistance')
-                ? namedArgs['refreshTriggerPullDistance']
-                : _defaultRefreshTriggerPullDistance,
-            refreshIndicatorExtent: namedArgs.containsKey('refreshIndicatorExtent')
-                ? namedArgs['refreshIndicatorExtent']
-                : _defaultRefreshIndicatorExtent,
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : buildRefreshIndicator,
-            onRefresh: namedArgs.containsKey('onRefresh') ? namedArgs['onRefresh'] : null);
+        const buildRefreshIndicator =
+            CupertinoSliverRefreshControl.buildRefreshIndicator;
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoSliverRefreshControl(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                refreshTriggerPullDistance:
+                    namedArgs.containsKey(
+                            'refreshTriggerPullDistance')
+                        ? namedArgs['refreshTriggerPullDistance']
+                        : _defaultRefreshTriggerPullDistance,
+                refreshIndicatorExtent:
+                    namedArgs
+                            .containsKey('refreshIndicatorExtent')
+                        ? namedArgs['refreshIndicatorExtent']
+                        : _defaultRefreshIndicatorExtent,
+                builder: namedArgs.containsKey('builder')
+                    ? namedArgs['builder']
+                    : buildRefreshIndicator,
+                onRefresh: namedArgs.containsKey('onRefresh')
+                    ? namedArgs['onRefresh']
+                    : null);
       case 'CupertinoSliverRefreshControl.buildRefreshIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoSliverRefreshControl.buildRefreshIndicator(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoSliverRefreshControl.buildRefreshIndicator(
+                positionalArgs[0],
+                positionalArgs[1],
+                positionalArgs[2],
+                positionalArgs[3],
+                positionalArgs[4]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -74,12 +91,20 @@ class CupertinoSliverRefreshControlAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RefreshControlIndicatorBuilder': (HTFunction function) =>
-          (context, refreshState, pulledExtent, refreshTriggerPullDistance, refreshIndicatorExtent) => function.call(
-              positionalArgs: [context, refreshState, pulledExtent, refreshTriggerPullDistance, refreshIndicatorExtent],
-              namedArgs: const {}) as Widget,
-      'RefreshCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
+      'RefreshControlIndicatorBuilder': (HTFunction function) => (context,
+              refreshState,
+              pulledExtent,
+              refreshTriggerPullDistance,
+              refreshIndicatorExtent) =>
+          function.call(positionalArgs: [
+            context,
+            refreshState,
+            pulledExtent,
+            refreshTriggerPullDistance,
+            refreshIndicatorExtent
+          ], namedArgs: const {}) as Widget,
+      'RefreshCallback': (HTFunction function) => () => function
+          .call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
     };
   }
 
@@ -87,11 +112,12 @@ class CupertinoSliverRefreshControlAutoBinding extends HTExternalClass {
   static const _defaultRefreshIndicatorExtent = 60.0;
 }
 
-extension CupertinoSliverRefreshControlBinding on CupertinoSliverRefreshControl {
+extension CupertinoSliverRefreshControlBinding
+    on CupertinoSliverRefreshControl {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoSliverRefreshControl');
+        return const HTType('CupertinoSliverRefreshControl');
       case 'refreshTriggerPullDistance':
         return refreshTriggerPullDistance;
       case 'refreshIndicatorExtent':
@@ -111,25 +137,37 @@ extension CupertinoSliverRefreshControlBinding on CupertinoSliverRefreshControl
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/route.g.dart b/lib/bindings/flutter/cupertino/route.g.dart
index 03bd299..ce7dfc7 100644
--- a/lib/bindings/flutter/cupertino/route.g.dart
+++ b/lib/bindings/flutter/cupertino/route.g.dart
@@ -11,14 +11,15 @@ class CupertinoPageTransitionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoPageTransition':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoPageTransition(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            primaryRouteAnimation: namedArgs['primaryRouteAnimation'],
-            secondaryRouteAnimation: namedArgs['secondaryRouteAnimation'],
-            child: namedArgs['child'],
-            linearTransition: namedArgs['linearTransition']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoPageTransition(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                primaryRouteAnimation: namedArgs['primaryRouteAnimation'],
+                secondaryRouteAnimation: namedArgs['secondaryRouteAnimation'],
+                child: namedArgs['child'],
+                linearTransition: namedArgs['linearTransition']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +33,7 @@ extension CupertinoPageTransitionBinding on CupertinoPageTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoPageTransition');
+        return const HTType('CupertinoPageTransition');
       case 'child':
         return child;
       case 'key':
@@ -40,50 +41,65 @@ extension CupertinoPageTransitionBinding on CupertinoPageTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class CupertinoFullscreenDialogTransitionAutoBinding extends HTExternalClass {
-  CupertinoFullscreenDialogTransitionAutoBinding() : super('CupertinoFullscreenDialogTransition');
+  CupertinoFullscreenDialogTransitionAutoBinding()
+      : super('CupertinoFullscreenDialogTransition');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoFullscreenDialogTransition':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoFullscreenDialogTransition(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            primaryRouteAnimation: namedArgs['primaryRouteAnimation'],
-            secondaryRouteAnimation: namedArgs['secondaryRouteAnimation'],
-            child: namedArgs['child'],
-            linearTransition: namedArgs['linearTransition']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoFullscreenDialogTransition(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                primaryRouteAnimation: namedArgs['primaryRouteAnimation'],
+                secondaryRouteAnimation: namedArgs['secondaryRouteAnimation'],
+                child: namedArgs['child'],
+                linearTransition: namedArgs['linearTransition']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -93,11 +109,12 @@ class CupertinoFullscreenDialogTransitionAutoBinding extends HTExternalClass {
   }
 }
 
-extension CupertinoFullscreenDialogTransitionBinding on CupertinoFullscreenDialogTransition {
+extension CupertinoFullscreenDialogTransitionBinding
+    on CupertinoFullscreenDialogTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoFullscreenDialogTransition');
+        return const HTType('CupertinoFullscreenDialogTransition');
       case 'child':
         return child;
       case 'key':
@@ -105,31 +122,44 @@ extension CupertinoFullscreenDialogTransitionBinding on CupertinoFullscreenDialo
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/scrollbar.g.dart b/lib/bindings/flutter/cupertino/scrollbar.g.dart
index e130bfc..21bf597 100644
--- a/lib/bindings/flutter/cupertino/scrollbar.g.dart
+++ b/lib/bindings/flutter/cupertino/scrollbar.g.dart
@@ -12,18 +12,29 @@ class CupertinoScrollbarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoScrollbar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            isAlwaysShown: namedArgs.containsKey('isAlwaysShown') ? namedArgs['isAlwaysShown'] : false,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : defaultThickness,
-            thicknessWhileDragging: namedArgs.containsKey('thicknessWhileDragging')
-                ? namedArgs['thicknessWhileDragging']
-                : defaultThicknessWhileDragging,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : defaultRadius,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            isAlwaysShown: namedArgs.containsKey('isAlwaysShown')
+                ? namedArgs['isAlwaysShown']
+                : false,
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : defaultThickness,
+            thicknessWhileDragging:
+                namedArgs.containsKey('thicknessWhileDragging')
+                    ? namedArgs['thicknessWhileDragging']
+                    : defaultThicknessWhileDragging,
+            radius: namedArgs.containsKey('radius')
+                ? namedArgs['radius']
+                : defaultRadius,
             radiusWhileDragging: namedArgs.containsKey('radiusWhileDragging')
                 ? namedArgs['radiusWhileDragging']
                 : defaultRadiusWhileDragging,
             notificationPredicate:
-                namedArgs.containsKey('notificationPredicate') ? namedArgs['notificationPredicate'] : null);
+                namedArgs.containsKey('notificationPredicate')
+                    ? namedArgs['notificationPredicate']
+                    : null);
       case 'CupertinoScrollbar.defaultThickness':
         return CupertinoScrollbar.defaultThickness;
       case 'CupertinoScrollbar.defaultThicknessWhileDragging':
@@ -33,7 +44,7 @@ class CupertinoScrollbarAutoBinding extends HTExternalClass {
       case 'CupertinoScrollbar.defaultRadiusWhileDragging':
         return CupertinoScrollbar.defaultRadiusWhileDragging;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,8 +55,9 @@ class CupertinoScrollbarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ScrollNotificationPredicate': (HTFunction function) =>
-          (notification) => function.call(positionalArgs: [notification], namedArgs: const {}) as bool,
+      'ScrollNotificationPredicate': (HTFunction function) => (notification) =>
+          function.call(positionalArgs: [notification], namedArgs: const {})
+              as bool,
     };
   }
 
@@ -59,7 +71,7 @@ extension CupertinoScrollbarBinding on CupertinoScrollbar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoScrollbar');
+        return const HTType('CupertinoScrollbar');
       case 'thicknessWhileDragging':
         return thicknessWhileDragging;
       case 'radiusWhileDragging':
@@ -95,25 +107,37 @@ extension CupertinoScrollbarBinding on CupertinoScrollbar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/search_field.g.dart b/lib/bindings/flutter/cupertino/search_field.g.dart
index 1581f10..bbc79bb 100644
--- a/lib/bindings/flutter/cupertino/search_field.g.dart
+++ b/lib/bindings/flutter/cupertino/search_field.g.dart
@@ -9,37 +9,67 @@ class CupertinoSearchTextFieldAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoSearchTextField':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoSearchTextField(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
-            onSubmitted: namedArgs.containsKey('onSubmitted') ? namedArgs['onSubmitted'] : null,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            placeholder: namedArgs.containsKey('placeholder') ? namedArgs['placeholder'] : null,
-            placeholderStyle: namedArgs.containsKey('placeholderStyle') ? namedArgs['placeholderStyle'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            padding: namedArgs.containsKey('padding')
-                ? namedArgs['padding']
-                : const EdgeInsetsDirectional.fromSTEB(3.8, 8, 5, 8),
-            itemColor: namedArgs.containsKey('itemColor') ? namedArgs['itemColor'] : CupertinoColors.secondaryLabel,
-            itemSize: namedArgs.containsKey('itemSize') ? namedArgs['itemSize'] : 20.0,
-            prefixInsets: namedArgs.containsKey('prefixInsets')
-                ? namedArgs['prefixInsets']
-                : const EdgeInsetsDirectional.fromSTEB(6, 0, 0, 4),
-            suffixInsets: namedArgs.containsKey('suffixInsets')
-                ? namedArgs['suffixInsets']
-                : const EdgeInsetsDirectional.fromSTEB(0, 0, 5, 2),
-            suffixIcon: namedArgs.containsKey('suffixIcon')
-                ? namedArgs['suffixIcon']
-                : const Icon(CupertinoIcons.xmark_circle_fill),
-            suffixMode: namedArgs.containsKey('suffixMode') ? namedArgs['suffixMode'] : OverlayVisibilityMode.editing,
-            onSuffixTap: namedArgs.containsKey('onSuffixTap') ? namedArgs['onSuffixTap'] : null,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoSearchTextField(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                controller: namedArgs.containsKey('controller')
+                    ? namedArgs['controller']
+                    : null,
+                onChanged: namedArgs.containsKey('onChanged')
+                    ? namedArgs['onChanged']
+                    : null,
+                onSubmitted: namedArgs.containsKey('onSubmitted')
+                    ? namedArgs['onSubmitted']
+                    : null,
+                style:
+                    namedArgs.containsKey('style') ? namedArgs['style'] : null,
+                placeholder: namedArgs.containsKey('placeholder')
+                    ? namedArgs['placeholder']
+                    : null,
+                placeholderStyle: namedArgs.containsKey('placeholderStyle')
+                    ? namedArgs['placeholderStyle']
+                    : null,
+                decoration: namedArgs.containsKey('decoration')
+                    ? namedArgs['decoration']
+                    : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                borderRadius: namedArgs.containsKey('borderRadius')
+                    ? namedArgs['borderRadius']
+                    : null,
+                padding: namedArgs.containsKey('padding')
+                    ? namedArgs['padding']
+                    : const EdgeInsetsDirectional.fromSTEB(3.8, 8, 5, 8),
+                itemColor: namedArgs.containsKey('itemColor')
+                    ? namedArgs['itemColor']
+                    : CupertinoColors.secondaryLabel,
+                itemSize: namedArgs.containsKey('itemSize')
+                    ? namedArgs['itemSize']
+                    : 20.0,
+                prefixInsets: namedArgs.containsKey('prefixInsets')
+                    ? namedArgs['prefixInsets']
+                    : const EdgeInsetsDirectional.fromSTEB(6, 0, 0, 4),
+                suffixInsets: namedArgs.containsKey('suffixInsets')
+                    ? namedArgs['suffixInsets']
+                    : const EdgeInsetsDirectional.fromSTEB(0, 0, 5, 2),
+                suffixIcon: namedArgs.containsKey('suffixIcon')
+                    ? namedArgs['suffixIcon']
+                    : const Icon(CupertinoIcons.xmark_circle_fill),
+                suffixMode: namedArgs.containsKey('suffixMode')
+                    ? namedArgs['suffixMode']
+                    : OverlayVisibilityMode.editing,
+                onSuffixTap: namedArgs.containsKey('onSuffixTap')
+                    ? namedArgs['onSuffixTap']
+                    : null,
+                restorationId: namedArgs.containsKey('restorationId')
+                    ? namedArgs['restorationId']
+                    : null,
+                focusNode: namedArgs.containsKey('focusNode')
+                    ? namedArgs['focusNode']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -50,7 +80,8 @@ class CupertinoSearchTextFieldAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -59,7 +90,7 @@ extension CupertinoSearchTextFieldBinding on CupertinoSearchTextField {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoSearchTextField');
+        return const HTType('CupertinoSearchTextField');
       case 'controller':
         return controller;
       case 'onChanged':
@@ -109,25 +140,37 @@ extension CupertinoSearchTextFieldBinding on CupertinoSearchTextField {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/slider.g.dart b/lib/bindings/flutter/cupertino/slider.g.dart
index 952e927..4650d3c 100644
--- a/lib/bindings/flutter/cupertino/slider.g.dart
+++ b/lib/bindings/flutter/cupertino/slider.g.dart
@@ -14,15 +14,25 @@ class CupertinoSliderAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            onChangeStart: namedArgs.containsKey('onChangeStart') ? namedArgs['onChangeStart'] : null,
-            onChangeEnd: namedArgs.containsKey('onChangeEnd') ? namedArgs['onChangeEnd'] : null,
+            onChangeStart: namedArgs.containsKey('onChangeStart')
+                ? namedArgs['onChangeStart']
+                : null,
+            onChangeEnd: namedArgs.containsKey('onChangeEnd')
+                ? namedArgs['onChangeEnd']
+                : null,
             min: namedArgs.containsKey('min') ? namedArgs['min'] : 0.0,
             max: namedArgs.containsKey('max') ? namedArgs['max'] : 1.0,
-            divisions: namedArgs.containsKey('divisions') ? namedArgs['divisions'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : CupertinoColors.white);
+            divisions: namedArgs.containsKey('divisions')
+                ? namedArgs['divisions']
+                : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : CupertinoColors.white);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,7 +46,7 @@ extension CupertinoSliderBinding on CupertinoSlider {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoSlider');
+        return const HTType('CupertinoSlider');
       case 'value':
         return value;
       case 'onChanged':
@@ -62,29 +72,41 @@ extension CupertinoSliderBinding on CupertinoSlider {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/switch.g.dart b/lib/bindings/flutter/cupertino/switch.g.dart
index 3b51541..1d1a574 100644
--- a/lib/bindings/flutter/cupertino/switch.g.dart
+++ b/lib/bindings/flutter/cupertino/switch.g.dart
@@ -16,12 +16,17 @@ class CupertinoSwitchAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start);
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +40,7 @@ extension CupertinoSwitchBinding on CupertinoSwitch {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoSwitch');
+        return const HTType('CupertinoSwitch');
       case 'value':
         return value;
       case 'onChanged':
@@ -53,29 +58,41 @@ extension CupertinoSwitchBinding on CupertinoSwitch {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/tab_scaffold.g.dart b/lib/bindings/flutter/cupertino/tab_scaffold.g.dart
index 21cbada..a603306 100644
--- a/lib/bindings/flutter/cupertino/tab_scaffold.g.dart
+++ b/lib/bindings/flutter/cupertino/tab_scaffold.g.dart
@@ -10,9 +10,12 @@ class CupertinoTabControllerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'CupertinoTabController':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            CupertinoTabController(initialIndex: namedArgs.containsKey('initialIndex') ? namedArgs['initialIndex'] : 0);
+            CupertinoTabController(
+                initialIndex: namedArgs.containsKey('initialIndex')
+                    ? namedArgs['initialIndex']
+                    : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +31,8 @@ class CupertinoTabControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -37,17 +41,19 @@ extension CupertinoTabControllerBinding on CupertinoTabController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTabController');
+        return const HTType('CupertinoTabController');
       case 'index':
         return index;
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -57,7 +63,7 @@ extension CupertinoTabControllerBinding on CupertinoTabController {
         index = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -73,13 +79,21 @@ class CupertinoTabScaffoldAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             tabBar: namedArgs['tabBar'],
             tabBuilder: namedArgs['tabBuilder'],
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
             resizeToAvoidBottomInset:
-                namedArgs.containsKey('resizeToAvoidBottomInset') ? namedArgs['resizeToAvoidBottomInset'] : true,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null);
+                namedArgs.containsKey('resizeToAvoidBottomInset')
+                    ? namedArgs['resizeToAvoidBottomInset']
+                    : true,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -90,8 +104,9 @@ class CupertinoTabScaffoldAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'IndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget,
+      'IndexedWidgetBuilder': (HTFunction function) => (context, index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget,
     };
   }
 }
@@ -100,7 +115,7 @@ extension CupertinoTabScaffoldBinding on CupertinoTabScaffold {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTabScaffold');
+        return const HTType('CupertinoTabScaffold');
       case 'tabBar':
         return tabBar;
       case 'controller':
@@ -124,40 +139,56 @@ extension CupertinoTabScaffoldBinding on CupertinoTabScaffold {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RestorableCupertinoTabControllerAutoBinding extends HTExternalClass {
-  RestorableCupertinoTabControllerAutoBinding() : super('RestorableCupertinoTabController');
+  RestorableCupertinoTabControllerAutoBinding()
+      : super('RestorableCupertinoTabController');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableCupertinoTabController':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableCupertinoTabController(
-            initialIndex: namedArgs.containsKey('initialIndex') ? namedArgs['initialIndex'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableCupertinoTabController(
+                initialIndex: namedArgs.containsKey('initialIndex')
+                    ? namedArgs['initialIndex']
+                    : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -168,16 +199,18 @@ class RestorableCupertinoTabControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension RestorableCupertinoTabControllerBinding on RestorableCupertinoTabController {
+extension RestorableCupertinoTabControllerBinding
+    on RestorableCupertinoTabController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableCupertinoTabController');
+        return const HTType('RestorableCupertinoTabController');
       case 'value':
         return value;
       case 'enabled':
@@ -185,19 +218,23 @@ extension RestorableCupertinoTabControllerBinding on RestorableCupertinoTabContr
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/tab_view.g.dart b/lib/bindings/flutter/cupertino/tab_view.g.dart
index 1e891e0..b0e8d56 100644
--- a/lib/bindings/flutter/cupertino/tab_view.g.dart
+++ b/lib/bindings/flutter/cupertino/tab_view.g.dart
@@ -11,18 +11,30 @@ class CupertinoTabViewAutoBinding extends HTExternalClass {
       case 'CupertinoTabView':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTabView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
-            navigatorKey: namedArgs.containsKey('navigatorKey') ? namedArgs['navigatorKey'] : null,
-            defaultTitle: namedArgs.containsKey('defaultTitle') ? namedArgs['defaultTitle'] : null,
-            routes: namedArgs.containsKey('routes') ? namedArgs['routes'] : null,
-            onGenerateRoute: namedArgs.containsKey('onGenerateRoute') ? namedArgs['onGenerateRoute'] : null,
-            onUnknownRoute: namedArgs.containsKey('onUnknownRoute') ? namedArgs['onUnknownRoute'] : null,
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            navigatorKey: namedArgs.containsKey('navigatorKey')
+                ? namedArgs['navigatorKey']
+                : null,
+            defaultTitle: namedArgs.containsKey('defaultTitle')
+                ? namedArgs['defaultTitle']
+                : null,
+            routes:
+                namedArgs.containsKey('routes') ? namedArgs['routes'] : null,
+            onGenerateRoute: namedArgs.containsKey('onGenerateRoute')
+                ? namedArgs['onGenerateRoute']
+                : null,
+            onUnknownRoute: namedArgs.containsKey('onUnknownRoute')
+                ? namedArgs['onUnknownRoute']
+                : null,
             navigatorObservers: namedArgs.containsKey('navigatorObservers')
                 ? List<NavigatorObserver>.from(namedArgs['navigatorObservers'])
                 : const <NavigatorObserver>[],
-            restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
+            restorationScopeId: namedArgs.containsKey('restorationScopeId')
+                ? namedArgs['restorationScopeId']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,10 +45,11 @@ class CupertinoTabViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'WidgetBuilder': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as Widget,
-      'RouteFactory': (HTFunction function) =>
-          (settings) => function.call(positionalArgs: [settings], namedArgs: const {}) as Route<dynamic>?,
+      'WidgetBuilder': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as Widget,
+      'RouteFactory': (HTFunction function) => (settings) =>
+          function.call(positionalArgs: [settings], namedArgs: const {})
+              as Route<dynamic>?,
     };
   }
 }
@@ -45,7 +58,7 @@ extension CupertinoTabViewBinding on CupertinoTabView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTabView');
+        return const HTType('CupertinoTabView');
       case 'builder':
         return builder;
       case 'navigatorKey':
@@ -73,25 +86,37 @@ extension CupertinoTabViewBinding on CupertinoTabView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/text_field.g.dart b/lib/bindings/flutter/cupertino/text_field.g.dart
index cbb5572..f8b06ad 100644
--- a/lib/bindings/flutter/cupertino/text_field.g.dart
+++ b/lib/bindings/flutter/cupertino/text_field.g.dart
@@ -8,7 +8,8 @@ import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 
 const _kDefaultRoundedBorderSide = BorderSide(
-    color: CupertinoDynamicColor.withBrightness(color: Color(0x33000000), darkColor: Color(0x33FFFFFF)),
+    color: CupertinoDynamicColor.withBrightness(
+        color: Color(0x33000000), darkColor: Color(0x33FFFFFF)),
     style: BorderStyle.solid,
     width: 0.0);
 const _kDefaultRoundedBorder = Border(
@@ -17,10 +18,12 @@ const _kDefaultRoundedBorder = Border(
     left: _kDefaultRoundedBorderSide,
     right: _kDefaultRoundedBorderSide);
 const _kDefaultRoundedBorderDecoration = BoxDecoration(
-    color: CupertinoDynamicColor.withBrightness(color: CupertinoColors.white, darkColor: CupertinoColors.black),
+    color: CupertinoDynamicColor.withBrightness(
+        color: CupertinoColors.white, darkColor: CupertinoColors.black),
     border: _kDefaultRoundedBorder,
     borderRadius: BorderRadius.all(Radius.circular(5.0)));
-const _kDefaultPlaceholderStyle = TextStyle(fontWeight: FontWeight.w400, color: CupertinoColors.placeholderText);
+const _kDefaultPlaceholderStyle = TextStyle(
+    fontWeight: FontWeight.w400, color: CupertinoColors.placeholderText);
 
 class OverlayVisibilityModeAutoBinding extends HTExternalClass {
   OverlayVisibilityModeAutoBinding() : super('OverlayVisibilityMode');
@@ -39,7 +42,7 @@ class OverlayVisibilityModeAutoBinding extends HTExternalClass {
       case 'OverlayVisibilityMode.always':
         return OverlayVisibilityMode.always;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -47,13 +50,14 @@ class OverlayVisibilityModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverlayVisibilityMode');
+        return const HTType('OverlayVisibilityMode');
       case 'index':
         return (instance as OverlayVisibilityMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as OverlayVisibilityMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as OverlayVisibilityMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -67,70 +71,115 @@ class CupertinoTextFieldAutoBinding extends HTExternalClass {
       case 'CupertinoTextField':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextField(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            decoration:
-                namedArgs.containsKey('decoration') ? namedArgs['decoration'] : _kDefaultRoundedBorderDecoration,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : const EdgeInsets.all(6.0),
-            placeholder: namedArgs.containsKey('placeholder') ? namedArgs['placeholder'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : _kDefaultRoundedBorderDecoration,
+            padding: namedArgs.containsKey('padding')
+                ? namedArgs['padding']
+                : const EdgeInsets.all(6.0),
+            placeholder: namedArgs.containsKey('placeholder')
+                ? namedArgs['placeholder']
+                : null,
             placeholderStyle: namedArgs.containsKey('placeholderStyle')
                 ? namedArgs['placeholderStyle']
-                : const TextStyle(fontWeight: FontWeight.w400, color: CupertinoColors.placeholderText),
-            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
-            prefixMode: namedArgs.containsKey('prefixMode') ? namedArgs['prefixMode'] : OverlayVisibilityMode.always,
-            suffix: namedArgs.containsKey('suffix') ? namedArgs['suffix'] : null,
-            suffixMode: namedArgs.containsKey('suffixMode') ? namedArgs['suffixMode'] : OverlayVisibilityMode.always,
-            clearButtonMode:
-                namedArgs.containsKey('clearButtonMode') ? namedArgs['clearButtonMode'] : OverlayVisibilityMode.never,
-            keyboardType: namedArgs.containsKey('keyboardType') ? namedArgs['keyboardType'] : null,
-            textInputAction: namedArgs.containsKey('textInputAction') ? namedArgs['textInputAction'] : null,
-            textCapitalization:
-                namedArgs.containsKey('textCapitalization') ? namedArgs['textCapitalization'] : TextCapitalization.none,
+                : const TextStyle(
+                    fontWeight: FontWeight.w400,
+                    color: CupertinoColors.placeholderText),
+            prefix:
+                namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
+            prefixMode: namedArgs.containsKey('prefixMode')
+                ? namedArgs['prefixMode']
+                : OverlayVisibilityMode.always,
+            suffix:
+                namedArgs.containsKey('suffix') ? namedArgs['suffix'] : null,
+            suffixMode: namedArgs.containsKey('suffixMode')
+                ? namedArgs['suffixMode']
+                : OverlayVisibilityMode.always,
+            clearButtonMode: namedArgs.containsKey('clearButtonMode')
+                ? namedArgs['clearButtonMode']
+                : OverlayVisibilityMode.never,
+            keyboardType: namedArgs.containsKey('keyboardType')
+                ? namedArgs['keyboardType']
+                : null,
+            textInputAction: namedArgs.containsKey('textInputAction')
+                ? namedArgs['textInputAction']
+                : null,
+            textCapitalization: namedArgs.containsKey('textCapitalization')
+                ? namedArgs['textCapitalization']
+                : TextCapitalization.none,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textAlignVertical: namedArgs.containsKey('textAlignVertical') ? namedArgs['textAlignVertical'] : null,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            obscuringCharacter: namedArgs.containsKey('obscuringCharacter') ? namedArgs['obscuringCharacter'] : '•',
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            autocorrect: namedArgs.containsKey('autocorrect') ? namedArgs['autocorrect'] : true,
-            smartDashesType: namedArgs.containsKey('smartDashesType') ? namedArgs['smartDashesType'] : null,
-            smartQuotesType: namedArgs.containsKey('smartQuotesType') ? namedArgs['smartQuotesType'] : null,
-            enableSuggestions: namedArgs.containsKey('enableSuggestions') ? namedArgs['enableSuggestions'] : true,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            expands: namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
-            maxLength: namedArgs.containsKey('maxLength') ? namedArgs['maxLength'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textAlignVertical: namedArgs.containsKey('textAlignVertical')
+                ? namedArgs['textAlignVertical']
+                : null,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : false,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions')
+                ? namedArgs['toolbarOptions']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            obscuringCharacter: namedArgs.containsKey('obscuringCharacter')
+                ? namedArgs['obscuringCharacter']
+                : '•',
+            obscureText: namedArgs.containsKey('obscureText')
+                ? namedArgs['obscureText']
+                : false,
+            autocorrect: namedArgs.containsKey('autocorrect')
+                ? namedArgs['autocorrect']
+                : true,
+            smartDashesType: namedArgs.containsKey('smartDashesType')
+                ? namedArgs['smartDashesType']
+                : null,
+            smartQuotesType: namedArgs.containsKey('smartQuotesType')
+                ? namedArgs['smartQuotesType']
+                : null,
+            enableSuggestions: namedArgs.containsKey('enableSuggestions')
+                ? namedArgs['enableSuggestions']
+                : true,
+            maxLines:
+                namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            expands:
+                namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
+            maxLength: namedArgs.containsKey('maxLength')
+                ? namedArgs['maxLength']
+                : null,
             maxLengthEnforcement:
                 namedArgs.containsKey('maxLengthEnforcement') ? namedArgs['maxLengthEnforcement'] : null,
             onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
             onEditingComplete: namedArgs.containsKey('onEditingComplete') ? namedArgs['onEditingComplete'] : null,
             onSubmitted: namedArgs.containsKey('onSubmitted') ? namedArgs['onSubmitted'] : null,
-            inputFormatters: namedArgs.containsKey('inputFormatters')
-                ? List<TextInputFormatter>.from(namedArgs['inputFormatters'])
-                : null,
+            inputFormatters: namedArgs.containsKey('inputFormatters') ? List<TextInputFormatter>.from(namedArgs['inputFormatters']) : null,
             enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
             cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
             cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
-            cursorRadius:
-                namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : const Radius.circular(2.0),
+            cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : const Radius.circular(2.0),
             cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle')
-                ? namedArgs['selectionHeightStyle']
-                : ui.BoxHeightStyle.tight,
-            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle')
-                ? namedArgs['selectionWidthStyle']
-                : ui.BoxWidthStyle.tight,
+            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle') ? namedArgs['selectionHeightStyle'] : ui.BoxHeightStyle.tight,
+            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle') ? namedArgs['selectionWidthStyle'] : ui.BoxWidthStyle.tight,
             keyboardAppearance: namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : null,
-            scrollPadding:
-                namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
+            scrollPadding: namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            enableInteractiveSelection: namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
             selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
             scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
@@ -140,35 +189,80 @@ class CupertinoTextFieldAutoBinding extends HTExternalClass {
       case 'CupertinoTextField.borderless':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextField.borderless(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : const EdgeInsets.all(6.0),
-            placeholder: namedArgs.containsKey('placeholder') ? namedArgs['placeholder'] : null,
-            placeholderStyle:
-                namedArgs.containsKey('placeholderStyle') ? namedArgs['placeholderStyle'] : _kDefaultPlaceholderStyle,
-            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
-            prefixMode: namedArgs.containsKey('prefixMode') ? namedArgs['prefixMode'] : OverlayVisibilityMode.always,
-            suffix: namedArgs.containsKey('suffix') ? namedArgs['suffix'] : null,
-            suffixMode: namedArgs.containsKey('suffixMode') ? namedArgs['suffixMode'] : OverlayVisibilityMode.always,
-            clearButtonMode:
-                namedArgs.containsKey('clearButtonMode') ? namedArgs['clearButtonMode'] : OverlayVisibilityMode.never,
-            keyboardType: namedArgs.containsKey('keyboardType') ? namedArgs['keyboardType'] : null,
-            textInputAction: namedArgs.containsKey('textInputAction') ? namedArgs['textInputAction'] : null,
-            textCapitalization:
-                namedArgs.containsKey('textCapitalization') ? namedArgs['textCapitalization'] : TextCapitalization.none,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            padding: namedArgs.containsKey('padding')
+                ? namedArgs['padding']
+                : const EdgeInsets.all(6.0),
+            placeholder: namedArgs.containsKey('placeholder')
+                ? namedArgs['placeholder']
+                : null,
+            placeholderStyle: namedArgs.containsKey('placeholderStyle')
+                ? namedArgs['placeholderStyle']
+                : _kDefaultPlaceholderStyle,
+            prefix:
+                namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
+            prefixMode: namedArgs.containsKey('prefixMode')
+                ? namedArgs['prefixMode']
+                : OverlayVisibilityMode.always,
+            suffix:
+                namedArgs.containsKey('suffix') ? namedArgs['suffix'] : null,
+            suffixMode: namedArgs.containsKey('suffixMode')
+                ? namedArgs['suffixMode']
+                : OverlayVisibilityMode.always,
+            clearButtonMode: namedArgs.containsKey('clearButtonMode')
+                ? namedArgs['clearButtonMode']
+                : OverlayVisibilityMode.never,
+            keyboardType: namedArgs.containsKey('keyboardType')
+                ? namedArgs['keyboardType']
+                : null,
+            textInputAction: namedArgs.containsKey('textInputAction')
+                ? namedArgs['textInputAction']
+                : null,
+            textCapitalization: namedArgs.containsKey('textCapitalization')
+                ? namedArgs['textCapitalization']
+                : TextCapitalization.none,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textAlignVertical: namedArgs.containsKey('textAlignVertical') ? namedArgs['textAlignVertical'] : null,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            obscuringCharacter: namedArgs.containsKey('obscuringCharacter') ? namedArgs['obscuringCharacter'] : '•',
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            autocorrect: namedArgs.containsKey('autocorrect') ? namedArgs['autocorrect'] : true,
-            smartDashesType: namedArgs.containsKey('smartDashesType') ? namedArgs['smartDashesType'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textAlignVertical: namedArgs.containsKey('textAlignVertical')
+                ? namedArgs['textAlignVertical']
+                : null,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : false,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions')
+                ? namedArgs['toolbarOptions']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            obscuringCharacter: namedArgs.containsKey('obscuringCharacter')
+                ? namedArgs['obscuringCharacter']
+                : '•',
+            obscureText: namedArgs.containsKey('obscureText')
+                ? namedArgs['obscureText']
+                : false,
+            autocorrect: namedArgs.containsKey('autocorrect')
+                ? namedArgs['autocorrect']
+                : true,
+            smartDashesType: namedArgs.containsKey('smartDashesType')
+                ? namedArgs['smartDashesType']
+                : null,
             smartQuotesType: namedArgs.containsKey('smartQuotesType') ? namedArgs['smartQuotesType'] : null,
             enableSuggestions: namedArgs.containsKey('enableSuggestions') ? namedArgs['enableSuggestions'] : true,
             maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
@@ -179,28 +273,18 @@ class CupertinoTextFieldAutoBinding extends HTExternalClass {
             onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
             onEditingComplete: namedArgs.containsKey('onEditingComplete') ? namedArgs['onEditingComplete'] : null,
             onSubmitted: namedArgs.containsKey('onSubmitted') ? namedArgs['onSubmitted'] : null,
-            inputFormatters: namedArgs.containsKey('inputFormatters')
-                ? List<TextInputFormatter>.from(namedArgs['inputFormatters'])
-                : null,
+            inputFormatters: namedArgs.containsKey('inputFormatters') ? List<TextInputFormatter>.from(namedArgs['inputFormatters']) : null,
             enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
             cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
             cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
-            cursorRadius:
-                namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : const Radius.circular(2.0),
+            cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : const Radius.circular(2.0),
             cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle')
-                ? namedArgs['selectionHeightStyle']
-                : ui.BoxHeightStyle.tight,
-            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle')
-                ? namedArgs['selectionWidthStyle']
-                : ui.BoxWidthStyle.tight,
+            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle') ? namedArgs['selectionHeightStyle'] : ui.BoxHeightStyle.tight,
+            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle') ? namedArgs['selectionWidthStyle'] : ui.BoxWidthStyle.tight,
             keyboardAppearance: namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : null,
-            scrollPadding:
-                namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
+            scrollPadding: namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            enableInteractiveSelection: namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
             selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
             scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
@@ -208,7 +292,7 @@ class CupertinoTextFieldAutoBinding extends HTExternalClass {
             autofillHints: namedArgs.containsKey('autofillHints') ? namedArgs['autofillHints'] : null,
             restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -219,8 +303,10 @@ class CupertinoTextFieldAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -229,7 +315,7 @@ extension CupertinoTextFieldBinding on CupertinoTextField {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTextField');
+        return const HTType('CupertinoTextField');
       case 'controller':
         return controller;
       case 'focusNode':
@@ -347,29 +433,41 @@ extension CupertinoTextFieldBinding on CupertinoTextField {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/text_form_field_row.g.dart b/lib/bindings/flutter/cupertino/text_form_field_row.g.dart
index a9fb875..028287f 100644
--- a/lib/bindings/flutter/cupertino/text_form_field_row.g.dart
+++ b/lib/bindings/flutter/cupertino/text_form_field_row.g.dart
@@ -12,63 +12,115 @@ class CupertinoTextFormFieldRowAutoBinding extends HTExternalClass {
       case 'CupertinoTextFormFieldRow':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextFormFieldRow(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            initialValue: namedArgs.containsKey('initialValue') ? namedArgs['initialValue'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            keyboardType: namedArgs.containsKey('keyboardType') ? namedArgs['keyboardType'] : null,
-            textCapitalization:
-                namedArgs.containsKey('textCapitalization') ? namedArgs['textCapitalization'] : TextCapitalization.none,
-            textInputAction: namedArgs.containsKey('textInputAction') ? namedArgs['textInputAction'] : null,
+            prefix:
+                namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            initialValue: namedArgs.containsKey('initialValue')
+                ? namedArgs['initialValue']
+                : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            keyboardType: namedArgs.containsKey('keyboardType')
+                ? namedArgs['keyboardType']
+                : null,
+            textCapitalization: namedArgs.containsKey('textCapitalization')
+                ? namedArgs['textCapitalization']
+                : TextCapitalization.none,
+            textInputAction: namedArgs.containsKey('textInputAction')
+                ? namedArgs['textInputAction']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textAlignVertical: namedArgs.containsKey('textAlignVertical') ? namedArgs['textAlignVertical'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : null,
-            obscuringCharacter: namedArgs.containsKey('obscuringCharacter') ? namedArgs['obscuringCharacter'] : '•',
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            autocorrect: namedArgs.containsKey('autocorrect') ? namedArgs['autocorrect'] : true,
-            smartDashesType: namedArgs.containsKey('smartDashesType') ? namedArgs['smartDashesType'] : null,
-            smartQuotesType: namedArgs.containsKey('smartQuotesType') ? namedArgs['smartQuotesType'] : null,
-            enableSuggestions: namedArgs.containsKey('enableSuggestions') ? namedArgs['enableSuggestions'] : true,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            expands: namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
-            maxLength: namedArgs.containsKey('maxLength') ? namedArgs['maxLength'] : null,
-            onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textAlignVertical: namedArgs.containsKey('textAlignVertical')
+                ? namedArgs['textAlignVertical']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : false,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions')
+                ? namedArgs['toolbarOptions']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : null,
+            obscuringCharacter: namedArgs.containsKey('obscuringCharacter')
+                ? namedArgs['obscuringCharacter']
+                : '•',
+            obscureText: namedArgs.containsKey('obscureText')
+                ? namedArgs['obscureText']
+                : false,
+            autocorrect: namedArgs.containsKey('autocorrect')
+                ? namedArgs['autocorrect']
+                : true,
+            smartDashesType: namedArgs.containsKey('smartDashesType')
+                ? namedArgs['smartDashesType']
+                : null,
+            smartQuotesType: namedArgs.containsKey('smartQuotesType')
+                ? namedArgs['smartQuotesType']
+                : null,
+            enableSuggestions: namedArgs.containsKey('enableSuggestions')
+                ? namedArgs['enableSuggestions']
+                : true,
+            maxLines:
+                namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            expands:
+                namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
+            maxLength: namedArgs.containsKey('maxLength')
+                ? namedArgs['maxLength']
+                : null,
+            onChanged: namedArgs.containsKey('onChanged')
+                ? namedArgs['onChanged']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onEditingComplete: namedArgs.containsKey('onEditingComplete') ? namedArgs['onEditingComplete'] : null,
-            onFieldSubmitted: namedArgs.containsKey('onFieldSubmitted') ? namedArgs['onFieldSubmitted'] : null,
-            onSaved: namedArgs.containsKey('onSaved') ? namedArgs['onSaved'] : null,
-            validator: namedArgs.containsKey('validator') ? namedArgs['validator'] : null,
+            onEditingComplete: namedArgs.containsKey('onEditingComplete')
+                ? namedArgs['onEditingComplete']
+                : null,
+            onFieldSubmitted: namedArgs.containsKey('onFieldSubmitted')
+                ? namedArgs['onFieldSubmitted']
+                : null,
+            onSaved:
+                namedArgs.containsKey('onSaved') ? namedArgs['onSaved'] : null,
+            validator: namedArgs.containsKey('validator')
+                ? namedArgs['validator']
+                : null,
             inputFormatters: namedArgs.containsKey('inputFormatters')
                 ? List<TextInputFormatter>.from(namedArgs['inputFormatters'])
                 : null,
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
+            enabled:
+                namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
             cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
             cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
             cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
             keyboardAppearance: namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : null,
-            scrollPadding:
-                namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
-            enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
+            scrollPadding: namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
+            enableInteractiveSelection: namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
             selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
             scrollPhysics: namedArgs.containsKey('scrollPhysics') ? namedArgs['scrollPhysics'] : null,
             autofillHints: namedArgs.containsKey('autofillHints') ? namedArgs['autofillHints'] : null,
-            autovalidateMode:
-                namedArgs.containsKey('autovalidateMode') ? namedArgs['autovalidateMode'] : AutovalidateMode.disabled,
+            autovalidateMode: namedArgs.containsKey('autovalidateMode') ? namedArgs['autovalidateMode'] : AutovalidateMode.disabled,
             placeholder: namedArgs.containsKey('placeholder') ? namedArgs['placeholder'] : null,
-            placeholderStyle: namedArgs.containsKey('placeholderStyle')
-                ? namedArgs['placeholderStyle']
-                : const TextStyle(fontWeight: FontWeight.w400, color: CupertinoColors.placeholderText));
+            placeholderStyle: namedArgs.containsKey('placeholderStyle') ? namedArgs['placeholderStyle'] : const TextStyle(fontWeight: FontWeight.w400, color: CupertinoColors.placeholderText));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -79,8 +131,10 @@ class CupertinoTextFormFieldRowAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -89,7 +143,7 @@ extension CupertinoTextFormFieldRowBinding on CupertinoTextFormFieldRow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTextFormFieldRow');
+        return const HTType('CupertinoTextFormFieldRow');
       case 'prefix':
         return prefix;
       case 'padding':
@@ -119,25 +173,37 @@ extension CupertinoTextFormFieldRowBinding on CupertinoTextFormFieldRow {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/text_selection.g.dart b/lib/bindings/flutter/cupertino/text_selection.g.dart
index be8cde7..35939aa 100644
--- a/lib/bindings/flutter/cupertino/text_selection.g.dart
+++ b/lib/bindings/flutter/cupertino/text_selection.g.dart
@@ -3,15 +3,17 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/rendering.dart';
 
 class CupertinoTextSelectionControlsAutoBinding extends HTExternalClass {
-  CupertinoTextSelectionControlsAutoBinding() : super('CupertinoTextSelectionControls');
+  CupertinoTextSelectionControlsAutoBinding()
+      : super('CupertinoTextSelectionControls');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoTextSelectionControls':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextSelectionControls();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTextSelectionControls();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,13 +23,15 @@ class CupertinoTextSelectionControlsAutoBinding extends HTExternalClass {
   }
 }
 
-extension CupertinoTextSelectionControlsBinding on CupertinoTextSelectionControls {
+extension CupertinoTextSelectionControlsBinding
+    on CupertinoTextSelectionControls {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTextSelectionControls');
+        return const HTType('CupertinoTextSelectionControls');
       case 'getHandleSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHandleSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHandleSize(positionalArgs[0]);
       case 'buildToolbar':
         return ({positionalArgs, namedArgs, typeArgs}) => buildToolbar(
             positionalArgs[0],
@@ -39,28 +43,37 @@ extension CupertinoTextSelectionControlsBinding on CupertinoTextSelectionControl
             positionalArgs[6],
             positionalArgs[7]);
       case 'buildHandle':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            buildHandle(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => buildHandle(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'getHandleAnchor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHandleAnchor(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHandleAnchor(positionalArgs[0], positionalArgs[1]);
       case 'canCut':
-        return ({positionalArgs, namedArgs, typeArgs}) => canCut(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canCut(positionalArgs[0]);
       case 'canCopy':
-        return ({positionalArgs, namedArgs, typeArgs}) => canCopy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canCopy(positionalArgs[0]);
       case 'canPaste':
-        return ({positionalArgs, namedArgs, typeArgs}) => canPaste(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canPaste(positionalArgs[0]);
       case 'canSelectAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => canSelectAll(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canSelectAll(positionalArgs[0]);
       case 'handleCut':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleCut(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleCut(positionalArgs[0]);
       case 'handleCopy':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleCopy(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleCopy(positionalArgs[0], positionalArgs[1]);
       case 'handlePaste':
-        return ({positionalArgs, namedArgs, typeArgs}) => handlePaste(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handlePaste(positionalArgs[0]);
       case 'handleSelectAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleSelectAll(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleSelectAll(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/text_selection_toolbar.g.dart b/lib/bindings/flutter/cupertino/text_selection_toolbar.g.dart
index 0003771..21760b1 100644
--- a/lib/bindings/flutter/cupertino/text_selection_toolbar.g.dart
+++ b/lib/bindings/flutter/cupertino/text_selection_toolbar.g.dart
@@ -10,7 +10,9 @@ const _kToolbarBorderRadius = Radius.circular(8);
 const _kToolbarDividerColor = Color(0xFF808080);
 
 class _RenderCupertinoTextSelectionToolbarShape extends RenderShiftedBox {
-  _RenderCupertinoTextSelectionToolbarShape(this._anchor, this._isAbove, RenderBox? child) : super(child);
+  _RenderCupertinoTextSelectionToolbarShape(
+      this._anchor, this._isAbove, RenderBox? child)
+      : super(child);
   @override
   bool get isRepaintBoundary => true;
   Offset _anchor;
@@ -31,17 +33,21 @@ class _RenderCupertinoTextSelectionToolbarShape extends RenderShiftedBox {
     markNeedsLayout();
   }
 
-  final BoxConstraints _heightConstraint = BoxConstraints.tightFor(height: _kToolbarHeight + _kToolbarArrowSize.height);
+  final BoxConstraints _heightConstraint = BoxConstraints.tightFor(
+      height: _kToolbarHeight + _kToolbarArrowSize.height);
   @override
   void performLayout() {
     if (child == null) {
       return;
     }
     final enforcedConstraint = constraints.loosen();
-    child!.layout(_heightConstraint.enforce(enforcedConstraint), parentUsesSize: true);
+    child!.layout(_heightConstraint.enforce(enforcedConstraint),
+        parentUsesSize: true);
     final childParentData = child!.parentData! as BoxParentData;
-    childParentData.offset = Offset(0.0, _isAbove ? -_kToolbarArrowSize.height : 0.0);
-    size = Size(child!.size.width, child!.size.height - _kToolbarArrowSize.height);
+    childParentData.offset =
+        Offset(0.0, _isAbove ? -_kToolbarArrowSize.height : 0.0);
+    size =
+        Size(child!.size.width, child!.size.height - _kToolbarArrowSize.height);
   }
 
   Path _clipPath() {
@@ -49,14 +55,17 @@ class _RenderCupertinoTextSelectionToolbarShape extends RenderShiftedBox {
     final rrect = Path()
       ..addRRect(RRect.fromRectAndRadius(
           Offset(0.0, _kToolbarArrowSize.height) &
-              Size(child!.size.width, child!.size.height - _kToolbarArrowSize.height * 2),
+              Size(child!.size.width,
+                  child!.size.height - _kToolbarArrowSize.height * 2),
           _kToolbarBorderRadius));
 
     final localAnchor = globalToLocal(_anchor);
     final centerX = childParentData.offset.dx + child!.size.width / 2;
     final arrowXOffsetFromCenter = localAnchor.dx - centerX;
     final arrowTipX = child!.size.width / 2 + arrowXOffsetFromCenter;
-    final arrowBaseY = _isAbove ? child!.size.height - _kToolbarArrowSize.height : _kToolbarArrowSize.height;
+    final arrowBaseY = _isAbove
+        ? child!.size.height - _kToolbarArrowSize.height
+        : _kToolbarArrowSize.height;
     final arrowTipY = _isAbove ? child!.size.height : 0;
     final arrow = Path()
       ..moveTo(arrowTipX, arrowTipY as double)
@@ -72,8 +81,13 @@ class _RenderCupertinoTextSelectionToolbarShape extends RenderShiftedBox {
       return;
     }
     final childParentData = child!.parentData! as BoxParentData;
-    _clipPathLayer = context.pushClipPath(needsCompositing, offset + childParentData.offset, Offset.zero & child!.size,
-        _clipPath(), (PaintingContext innerContext, Offset innerOffset) => innerContext.paintChild(child!, innerOffset),
+    _clipPathLayer = context.pushClipPath(
+        needsCompositing,
+        offset + childParentData.offset,
+        Offset.zero & child!.size,
+        _clipPath(),
+        (PaintingContext innerContext, Offset innerOffset) =>
+            innerContext.paintChild(child!, innerOffset),
         oldLayer: _clipPathLayer);
   }
 
@@ -89,13 +103,19 @@ class _RenderCupertinoTextSelectionToolbarShape extends RenderShiftedBox {
         ..shader = ui.Gradient.linear(
             Offset.zero,
             const Offset(10.0, 10.0),
-            const <Color>[Color(0x00000000), Color(0xFFFF00FF), Color(0xFFFF00FF), Color(0x00000000)],
+            const <Color>[
+              Color(0x00000000),
+              Color(0xFFFF00FF),
+              Color(0xFFFF00FF),
+              Color(0x00000000)
+            ],
             const <double>[0.25, 0.25, 0.75, 0.75],
             TileMode.repeated)
         ..strokeWidth = 2.0
         ..style = PaintingStyle.stroke;
       final childParentData = child!.parentData! as BoxParentData;
-      context.canvas.drawPath(_clipPath().shift(offset + childParentData.offset), _debugPaint!);
+      context.canvas.drawPath(
+          _clipPath().shift(offset + childParentData.offset), _debugPaint!);
       return true;
     }());
   }
@@ -103,8 +123,11 @@ class _RenderCupertinoTextSelectionToolbarShape extends RenderShiftedBox {
   @override
   bool hitTestChildren(BoxHitTestResult result, {required Offset position}) {
     final childParentData = child!.parentData! as BoxParentData;
-    final hitBox = Rect.fromLTWH(childParentData.offset.dx, childParentData.offset.dy + _kToolbarArrowSize.height,
-        child!.size.width, child!.size.height - _kToolbarArrowSize.height * 2);
+    final hitBox = Rect.fromLTWH(
+        childParentData.offset.dx,
+        childParentData.offset.dy + _kToolbarArrowSize.height,
+        child!.size.width,
+        child!.size.height - _kToolbarArrowSize.height * 2);
     if (!hitBox.contains(position)) {
       return false;
     }
@@ -112,18 +135,22 @@ class _RenderCupertinoTextSelectionToolbarShape extends RenderShiftedBox {
   }
 }
 
-class _CupertinoTextSelectionToolbarShape extends SingleChildRenderObjectWidget {
-  const _CupertinoTextSelectionToolbarShape({Key? key, required Offset anchor, required bool isAbove, Widget? child})
+class _CupertinoTextSelectionToolbarShape
+    extends SingleChildRenderObjectWidget {
+  const _CupertinoTextSelectionToolbarShape(
+      {Key? key, required Offset anchor, required bool isAbove, Widget? child})
       : _anchor = anchor,
         _isAbove = isAbove,
         super(key: key, child: child);
   final Offset _anchor;
   final bool _isAbove;
   @override
-  _RenderCupertinoTextSelectionToolbarShape createRenderObject(BuildContext context) =>
+  _RenderCupertinoTextSelectionToolbarShape createRenderObject(
+          BuildContext context) =>
       _RenderCupertinoTextSelectionToolbarShape(_anchor, _isAbove, null);
   @override
-  void updateRenderObject(BuildContext context, _RenderCupertinoTextSelectionToolbarShape renderObject) {
+  void updateRenderObject(BuildContext context,
+      _RenderCupertinoTextSelectionToolbarShape renderObject) {
     renderObject
       ..anchor = _anchor
       ..isAbove = _isAbove;
@@ -131,21 +158,24 @@ class _CupertinoTextSelectionToolbarShape extends SingleChildRenderObjectWidget
 }
 
 class CupertinoTextSelectionToolbarAutoBinding extends HTExternalClass {
-  CupertinoTextSelectionToolbarAutoBinding() : super('CupertinoTextSelectionToolbar');
+  CupertinoTextSelectionToolbarAutoBinding()
+      : super('CupertinoTextSelectionToolbar');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoTextSelectionToolbar':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextSelectionToolbar(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            anchorAbove: namedArgs['anchorAbove'],
-            anchorBelow: namedArgs['anchorBelow'],
-            toolbarBuilder:
-                namedArgs.containsKey('toolbarBuilder') ? namedArgs['toolbarBuilder'] : _defaultToolbarBuilder,
-            children: List<Widget>.from(namedArgs['children']));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTextSelectionToolbar(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                anchorAbove: namedArgs['anchorAbove'],
+                anchorBelow: namedArgs['anchorBelow'],
+                toolbarBuilder: namedArgs.containsKey('toolbarBuilder')
+                    ? namedArgs['toolbarBuilder']
+                    : _defaultToolbarBuilder,
+                children: List<Widget>.from(namedArgs['children']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -156,24 +186,30 @@ class CupertinoTextSelectionToolbarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'CupertinoToolbarBuilder': (HTFunction function) => (context, anchor, isAbove, child) =>
-          function.call(positionalArgs: [context, anchor, isAbove, child], namedArgs: const {}) as Widget,
+      'CupertinoToolbarBuilder': (HTFunction function) =>
+          (context, anchor, isAbove, child) => function.call(
+              positionalArgs: [context, anchor, isAbove, child],
+              namedArgs: const {}) as Widget,
     };
   }
 
-  static Widget _defaultToolbarBuilder(BuildContext context, Offset anchor, bool isAbove, Widget child) {
+  static Widget _defaultToolbarBuilder(
+      BuildContext context, Offset anchor, bool isAbove, Widget child) {
     return _CupertinoTextSelectionToolbarShape(
         anchor: anchor,
         isAbove: isAbove,
-        child: DecoratedBox(decoration: const BoxDecoration(color: _kToolbarDividerColor), child: child));
+        child: DecoratedBox(
+            decoration: const BoxDecoration(color: _kToolbarDividerColor),
+            child: child));
   }
 }
 
-extension CupertinoTextSelectionToolbarBinding on CupertinoTextSelectionToolbar {
+extension CupertinoTextSelectionToolbarBinding
+    on CupertinoTextSelectionToolbar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTextSelectionToolbar');
+        return const HTType('CupertinoTextSelectionToolbar');
       case 'anchorAbove':
         return anchorAbove;
       case 'anchorBelow':
@@ -187,31 +223,44 @@ extension CupertinoTextSelectionToolbarBinding on CupertinoTextSelectionToolbar
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/text_selection_toolbar_button.g.dart b/lib/bindings/flutter/cupertino/text_selection_toolbar_button.g.dart
index f3752ca..b5400ce 100644
--- a/lib/bindings/flutter/cupertino/text_selection_toolbar_button.g.dart
+++ b/lib/bindings/flutter/cupertino/text_selection_toolbar_button.g.dart
@@ -3,23 +3,30 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/widgets.dart';
 
 class CupertinoTextSelectionToolbarButtonAutoBinding extends HTExternalClass {
-  CupertinoTextSelectionToolbarButtonAutoBinding() : super('CupertinoTextSelectionToolbarButton');
+  CupertinoTextSelectionToolbarButtonAutoBinding()
+      : super('CupertinoTextSelectionToolbarButton');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoTextSelectionToolbarButton':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextSelectionToolbarButton(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTextSelectionToolbarButton(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                onPressed: namedArgs.containsKey('onPressed')
+                    ? namedArgs['onPressed']
+                    : null,
+                child: namedArgs['child']);
       case 'CupertinoTextSelectionToolbarButton.text':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextSelectionToolbarButton.text(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            text: namedArgs['text']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTextSelectionToolbarButton.text(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                onPressed: namedArgs.containsKey('onPressed')
+                    ? namedArgs['onPressed']
+                    : null,
+                text: namedArgs['text']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,16 +37,18 @@ class CupertinoTextSelectionToolbarButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension CupertinoTextSelectionToolbarButtonBinding on CupertinoTextSelectionToolbarButton {
+extension CupertinoTextSelectionToolbarButtonBinding
+    on CupertinoTextSelectionToolbarButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTextSelectionToolbarButton');
+        return const HTType('CupertinoTextSelectionToolbarButton');
       case 'child':
         return child;
       case 'onPressed':
@@ -49,31 +58,44 @@ extension CupertinoTextSelectionToolbarButtonBinding on CupertinoTextSelectionTo
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/text_theme.g.dart b/lib/bindings/flutter/cupertino/text_theme.g.dart
index 0927bfa..4560950 100644
--- a/lib/bindings/flutter/cupertino/text_theme.g.dart
+++ b/lib/bindings/flutter/cupertino/text_theme.g.dart
@@ -10,21 +10,52 @@ class CupertinoTextThemeDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoTextThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTextThemeData(
-            primaryColor:
-                namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : CupertinoColors.systemBlue,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            actionTextStyle: namedArgs.containsKey('actionTextStyle') ? namedArgs['actionTextStyle'] : null,
-            tabLabelTextStyle: namedArgs.containsKey('tabLabelTextStyle') ? namedArgs['tabLabelTextStyle'] : null,
-            navTitleTextStyle: namedArgs.containsKey('navTitleTextStyle') ? namedArgs['navTitleTextStyle'] : null,
-            navLargeTitleTextStyle:
-                namedArgs.containsKey('navLargeTitleTextStyle') ? namedArgs['navLargeTitleTextStyle'] : null,
-            navActionTextStyle: namedArgs.containsKey('navActionTextStyle') ? namedArgs['navActionTextStyle'] : null,
-            pickerTextStyle: namedArgs.containsKey('pickerTextStyle') ? namedArgs['pickerTextStyle'] : null,
-            dateTimePickerTextStyle:
-                namedArgs.containsKey('dateTimePickerTextStyle') ? namedArgs['dateTimePickerTextStyle'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTextThemeData(
+                primaryColor: namedArgs.containsKey('primaryColor')
+                    ? namedArgs['primaryColor']
+                    : CupertinoColors.systemBlue,
+                textStyle:
+                    namedArgs.containsKey(
+                            'textStyle')
+                        ? namedArgs['textStyle']
+                        : null,
+                actionTextStyle:
+                    namedArgs.containsKey(
+                            'actionTextStyle')
+                        ? namedArgs['actionTextStyle']
+                        : null,
+                tabLabelTextStyle:
+                    namedArgs.containsKey(
+                            'tabLabelTextStyle')
+                        ? namedArgs['tabLabelTextStyle']
+                        : null,
+                navTitleTextStyle:
+                    namedArgs.containsKey(
+                            'navTitleTextStyle')
+                        ? namedArgs['navTitleTextStyle']
+                        : null,
+                navLargeTitleTextStyle:
+                    namedArgs.containsKey(
+                            'navLargeTitleTextStyle')
+                        ? namedArgs['navLargeTitleTextStyle']
+                        : null,
+                navActionTextStyle:
+                    namedArgs.containsKey(
+                            'navActionTextStyle')
+                        ? namedArgs['navActionTextStyle']
+                        : null,
+                pickerTextStyle:
+                    namedArgs.containsKey(
+                            'pickerTextStyle')
+                        ? namedArgs['pickerTextStyle']
+                        : null,
+                dateTimePickerTextStyle:
+                    namedArgs.containsKey('dateTimePickerTextStyle')
+                        ? namedArgs['dateTimePickerTextStyle']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -38,7 +69,7 @@ extension CupertinoTextThemeDataBinding on CupertinoTextThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTextThemeData');
+        return const HTType('CupertinoTextThemeData');
       case 'textStyle':
         return textStyle;
       case 'actionTextStyle':
@@ -56,33 +87,55 @@ extension CupertinoTextThemeDataBinding on CupertinoTextThemeData {
       case 'dateTimePickerTextStyle':
         return dateTimePickerTextStyle;
       case 'resolveFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveFrom(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveFrom(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            actionTextStyle: namedArgs.containsKey('actionTextStyle') ? namedArgs['actionTextStyle'] : null,
-            tabLabelTextStyle: namedArgs.containsKey('tabLabelTextStyle') ? namedArgs['tabLabelTextStyle'] : null,
-            navTitleTextStyle: namedArgs.containsKey('navTitleTextStyle') ? namedArgs['navTitleTextStyle'] : null,
+            primaryColor: namedArgs.containsKey('primaryColor')
+                ? namedArgs['primaryColor']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            actionTextStyle: namedArgs.containsKey('actionTextStyle')
+                ? namedArgs['actionTextStyle']
+                : null,
+            tabLabelTextStyle: namedArgs.containsKey('tabLabelTextStyle')
+                ? namedArgs['tabLabelTextStyle']
+                : null,
+            navTitleTextStyle: namedArgs.containsKey('navTitleTextStyle')
+                ? namedArgs['navTitleTextStyle']
+                : null,
             navLargeTitleTextStyle:
-                namedArgs.containsKey('navLargeTitleTextStyle') ? namedArgs['navLargeTitleTextStyle'] : null,
-            navActionTextStyle: namedArgs.containsKey('navActionTextStyle') ? namedArgs['navActionTextStyle'] : null,
-            pickerTextStyle: namedArgs.containsKey('pickerTextStyle') ? namedArgs['pickerTextStyle'] : null,
+                namedArgs.containsKey('navLargeTitleTextStyle')
+                    ? namedArgs['navLargeTitleTextStyle']
+                    : null,
+            navActionTextStyle: namedArgs.containsKey('navActionTextStyle')
+                ? namedArgs['navActionTextStyle']
+                : null,
+            pickerTextStyle: namedArgs.containsKey('pickerTextStyle')
+                ? namedArgs['pickerTextStyle']
+                : null,
             dateTimePickerTextStyle:
-                namedArgs.containsKey('dateTimePickerTextStyle') ? namedArgs['dateTimePickerTextStyle'] : null);
+                namedArgs.containsKey('dateTimePickerTextStyle')
+                    ? namedArgs['dateTimePickerTextStyle']
+                    : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/theme.g.dart b/lib/bindings/flutter/cupertino/theme.g.dart
index fb18d6f..82fa073 100644
--- a/lib/bindings/flutter/cupertino/theme.g.dart
+++ b/lib/bindings/flutter/cupertino/theme.g.dart
@@ -15,13 +15,16 @@ class CupertinoThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'CupertinoTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTheme.of(positionalArgs[0]);
       case 'CupertinoTheme.brightnessOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTheme.brightnessOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTheme.brightnessOf(positionalArgs[0]);
       case 'CupertinoTheme.maybeBrightnessOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoTheme.maybeBrightnessOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoTheme.maybeBrightnessOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +38,7 @@ extension CupertinoThemeBinding on CupertinoTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoTheme');
+        return const HTType('CupertinoTheme');
       case 'data':
         return data;
       case 'child':
@@ -45,31 +48,44 @@ extension CupertinoThemeBinding on CupertinoTheme {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -82,19 +98,37 @@ class CupertinoThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'CupertinoThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoThemeData(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            primaryColor: namedArgs.containsKey('primaryColor')
+                ? namedArgs['primaryColor']
+                : null,
             primaryContrastingColor:
-                namedArgs.containsKey('primaryContrastingColor') ? namedArgs['primaryContrastingColor'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            barBackgroundColor: namedArgs.containsKey('barBackgroundColor') ? namedArgs['barBackgroundColor'] : null,
+                namedArgs.containsKey('primaryContrastingColor')
+                    ? namedArgs['primaryContrastingColor']
+                    : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            barBackgroundColor: namedArgs.containsKey('barBackgroundColor')
+                ? namedArgs['barBackgroundColor']
+                : null,
             scaffoldBackgroundColor:
-                namedArgs.containsKey('scaffoldBackgroundColor') ? namedArgs['scaffoldBackgroundColor'] : null);
+                namedArgs.containsKey('scaffoldBackgroundColor')
+                    ? namedArgs['scaffoldBackgroundColor']
+                    : null);
       case 'CupertinoThemeData.raw':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoThemeData.raw(positionalArgs[0], positionalArgs[1],
-            positionalArgs[2], positionalArgs[3], positionalArgs[4], positionalArgs[5]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoThemeData.raw(
+                positionalArgs[0],
+                positionalArgs[1],
+                positionalArgs[2],
+                positionalArgs[3],
+                positionalArgs[4],
+                positionalArgs[5]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -108,7 +142,7 @@ extension CupertinoThemeDataBinding on CupertinoThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoThemeData');
+        return const HTType('CupertinoThemeData');
       case 'brightness':
         return brightness;
       case 'primaryColor':
@@ -124,52 +158,82 @@ extension CupertinoThemeDataBinding on CupertinoThemeData {
       case 'noDefault':
         return ({positionalArgs, namedArgs, typeArgs}) => noDefault();
       case 'resolveFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveFrom(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveFrom(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            primaryColor: namedArgs.containsKey('primaryColor')
+                ? namedArgs['primaryColor']
+                : null,
             primaryContrastingColor:
-                namedArgs.containsKey('primaryContrastingColor') ? namedArgs['primaryContrastingColor'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            barBackgroundColor: namedArgs.containsKey('barBackgroundColor') ? namedArgs['barBackgroundColor'] : null,
+                namedArgs.containsKey('primaryContrastingColor')
+                    ? namedArgs['primaryContrastingColor']
+                    : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            barBackgroundColor: namedArgs.containsKey('barBackgroundColor')
+                ? namedArgs['barBackgroundColor']
+                : null,
             scaffoldBackgroundColor:
-                namedArgs.containsKey('scaffoldBackgroundColor') ? namedArgs['scaffoldBackgroundColor'] : null);
+                namedArgs.containsKey('scaffoldBackgroundColor')
+                    ? namedArgs['scaffoldBackgroundColor']
+                    : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class NoDefaultCupertinoThemeDataAutoBinding extends HTExternalClass {
-  NoDefaultCupertinoThemeDataAutoBinding() : super('NoDefaultCupertinoThemeData');
+  NoDefaultCupertinoThemeDataAutoBinding()
+      : super('NoDefaultCupertinoThemeData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NoDefaultCupertinoThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => NoDefaultCupertinoThemeData(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
-            primaryContrastingColor:
-                namedArgs.containsKey('primaryContrastingColor') ? namedArgs['primaryContrastingColor'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            barBackgroundColor: namedArgs.containsKey('barBackgroundColor') ? namedArgs['barBackgroundColor'] : null,
-            scaffoldBackgroundColor:
-                namedArgs.containsKey('scaffoldBackgroundColor') ? namedArgs['scaffoldBackgroundColor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NoDefaultCupertinoThemeData(
+                brightness: namedArgs.containsKey('brightness')
+                    ? namedArgs['brightness']
+                    : null,
+                primaryColor: namedArgs.containsKey('primaryColor')
+                    ? namedArgs['primaryColor']
+                    : null,
+                primaryContrastingColor:
+                    namedArgs.containsKey('primaryContrastingColor')
+                        ? namedArgs['primaryContrastingColor']
+                        : null,
+                textTheme: namedArgs.containsKey('textTheme')
+                    ? namedArgs['textTheme']
+                    : null,
+                barBackgroundColor: namedArgs.containsKey('barBackgroundColor')
+                    ? namedArgs['barBackgroundColor']
+                    : null,
+                scaffoldBackgroundColor:
+                    namedArgs.containsKey('scaffoldBackgroundColor')
+                        ? namedArgs['scaffoldBackgroundColor']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -183,7 +247,7 @@ extension NoDefaultCupertinoThemeDataBinding on NoDefaultCupertinoThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NoDefaultCupertinoThemeData');
+        return const HTType('NoDefaultCupertinoThemeData');
       case 'brightness':
         return brightness;
       case 'primaryColor':
@@ -200,16 +264,28 @@ extension NoDefaultCupertinoThemeDataBinding on NoDefaultCupertinoThemeData {
         return ({positionalArgs, namedArgs, typeArgs}) => noDefault();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            primaryColor: namedArgs.containsKey('primaryColor')
+                ? namedArgs['primaryColor']
+                : null,
             primaryContrastingColor:
-                namedArgs.containsKey('primaryContrastingColor') ? namedArgs['primaryContrastingColor'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            barBackgroundColor: namedArgs.containsKey('barBackgroundColor') ? namedArgs['barBackgroundColor'] : null,
+                namedArgs.containsKey('primaryContrastingColor')
+                    ? namedArgs['primaryContrastingColor']
+                    : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            barBackgroundColor: namedArgs.containsKey('barBackgroundColor')
+                ? namedArgs['barBackgroundColor']
+                : null,
             scaffoldBackgroundColor:
-                namedArgs.containsKey('scaffoldBackgroundColor') ? namedArgs['scaffoldBackgroundColor'] : null);
+                namedArgs.containsKey('scaffoldBackgroundColor')
+                    ? namedArgs['scaffoldBackgroundColor']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/cupertino/thumb_painter.g.dart b/lib/bindings/flutter/cupertino/thumb_painter.g.dart
index 80b2320..92f2fa7 100644
--- a/lib/bindings/flutter/cupertino/thumb_painter.g.dart
+++ b/lib/bindings/flutter/cupertino/thumb_painter.g.dart
@@ -20,20 +20,27 @@ class CupertinoThumbPainterAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'CupertinoThumbPainter':
         return ({positionalArgs, namedArgs, typeArgs}) => CupertinoThumbPainter(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : CupertinoColors.white,
-            shadows:
-                namedArgs.containsKey('shadows') ? List<BoxShadow>.from(namedArgs['shadows']) : _kSliderBoxShadows);
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : CupertinoColors.white,
+            shadows: namedArgs.containsKey('shadows')
+                ? List<BoxShadow>.from(namedArgs['shadows'])
+                : _kSliderBoxShadows);
       case 'CupertinoThumbPainter.switchThumb':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoThumbPainter.switchThumb(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : CupertinoColors.white,
-            shadows:
-                namedArgs.containsKey('shadows') ? List<BoxShadow>.from(namedArgs['shadows']) : _kSwitchBoxShadows);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoThumbPainter.switchThumb(
+                color: namedArgs.containsKey('color')
+                    ? namedArgs['color']
+                    : CupertinoColors.white,
+                shadows: namedArgs.containsKey('shadows')
+                    ? List<BoxShadow>.from(namedArgs['shadows'])
+                    : _kSwitchBoxShadows);
       case 'CupertinoThumbPainter.radius':
         return CupertinoThumbPainter.radius;
       case 'CupertinoThumbPainter.extension':
         return CupertinoThumbPainter.extension;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -47,15 +54,16 @@ extension CupertinoThumbPainterBinding on CupertinoThumbPainter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoThumbPainter');
+        return const HTType('CupertinoThumbPainter');
       case 'color':
         return color;
       case 'shadows':
         return shadows;
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/annotations.g.dart b/lib/bindings/flutter/foundation/annotations.g.dart
index 97be4fc..b8c7fd8 100644
--- a/lib/bindings/flutter/foundation/annotations.g.dart
+++ b/lib/bindings/flutter/foundation/annotations.g.dart
@@ -8,9 +8,10 @@ class CategoryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Category':
-        return ({positionalArgs, namedArgs, typeArgs}) => Category(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Category(List<String>.from(positionalArgs[0]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,11 +25,11 @@ extension CategoryBinding on Category {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Category');
+        return const HTType('Category');
       case 'sections':
         return sections;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -40,9 +41,10 @@ class DocumentationIconAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DocumentationIcon':
-        return ({positionalArgs, namedArgs, typeArgs}) => DocumentationIcon(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DocumentationIcon(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -56,11 +58,11 @@ extension DocumentationIconBinding on DocumentationIcon {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DocumentationIcon');
+        return const HTType('DocumentationIcon');
       case 'url':
         return url;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -72,9 +74,10 @@ class SummaryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Summary':
-        return ({positionalArgs, namedArgs, typeArgs}) => Summary(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Summary(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -88,11 +91,11 @@ extension SummaryBinding on Summary {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Summary');
+        return const HTType('Summary');
       case 'text':
         return text;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/assertions.g.dart b/lib/bindings/flutter/foundation/assertions.g.dart
index fafc040..b55e67b 100644
--- a/lib/bindings/flutter/foundation/assertions.g.dart
+++ b/lib/bindings/flutter/foundation/assertions.g.dart
@@ -9,11 +9,13 @@ class PartialStackFrameAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PartialStackFrame':
         return ({positionalArgs, namedArgs, typeArgs}) => PartialStackFrame(
-            package: namedArgs['package'], className: namedArgs['className'], method: namedArgs['method']);
+            package: namedArgs['package'],
+            className: namedArgs['className'],
+            method: namedArgs['method']);
       case 'PartialStackFrame.asynchronousSuspension':
         return PartialStackFrame.asynchronousSuspension;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +29,7 @@ extension PartialStackFrameBinding on PartialStackFrame {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PartialStackFrame');
+        return const HTType('PartialStackFrame');
       case 'package':
         return package;
       case 'className':
@@ -35,9 +37,10 @@ extension PartialStackFrameBinding on PartialStackFrame {
       case 'method':
         return method;
       case 'matches':
-        return ({positionalArgs, namedArgs, typeArgs}) => matches(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            matches(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -49,10 +52,12 @@ class RepetitiveStackFrameFilterAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RepetitiveStackFrameFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => RepetitiveStackFrameFilter(
-            frames: List<PartialStackFrame>.from(namedArgs['frames']), replacement: namedArgs['replacement']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RepetitiveStackFrameFilter(
+                frames: List<PartialStackFrame>.from(namedArgs['frames']),
+                replacement: namedArgs['replacement']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +71,7 @@ extension RepetitiveStackFrameFilterBinding on RepetitiveStackFrameFilter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RepetitiveStackFrameFilter');
+        return const HTType('RepetitiveStackFrameFilter');
       case 'frames':
         return frames;
       case 'replacement':
@@ -74,10 +79,11 @@ extension RepetitiveStackFrameFilterBinding on RepetitiveStackFrameFilter {
       case 'numFrames':
         return numFrames;
       case 'filter':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            filter(List<StackFrame>.from(positionalArgs[0]), List<String?>.from(positionalArgs[1]));
+        return ({positionalArgs, namedArgs, typeArgs}) => filter(
+            List<StackFrame>.from(positionalArgs[0]),
+            List<String?>.from(positionalArgs[1]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -89,9 +95,10 @@ class ErrorDescriptionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ErrorDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => ErrorDescription(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ErrorDescription(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -105,7 +112,7 @@ extension ErrorDescriptionBinding on ErrorDescription {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ErrorDescription');
+        return const HTType('ErrorDescription');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -146,32 +153,48 @@ extension ErrorDescriptionBinding on ErrorDescription {
         return allowTruncate;
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -183,9 +206,10 @@ class ErrorSummaryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ErrorSummary':
-        return ({positionalArgs, namedArgs, typeArgs}) => ErrorSummary(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ErrorSummary(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -199,7 +223,7 @@ extension ErrorSummaryBinding on ErrorSummary {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ErrorSummary');
+        return const HTType('ErrorSummary');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -240,32 +264,48 @@ extension ErrorSummaryBinding on ErrorSummary {
         return allowTruncate;
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -277,9 +317,10 @@ class ErrorHintAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ErrorHint':
-        return ({positionalArgs, namedArgs, typeArgs}) => ErrorHint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ErrorHint(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -293,7 +334,7 @@ extension ErrorHintBinding on ErrorHint {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ErrorHint');
+        return const HTType('ErrorHint');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -334,32 +375,48 @@ extension ErrorHintBinding on ErrorHint {
         return allowTruncate;
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -373,7 +430,7 @@ class ErrorSpacerAutoBinding extends HTExternalClass {
       case 'ErrorSpacer':
         return ({positionalArgs, namedArgs, typeArgs}) => ErrorSpacer();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -387,7 +444,7 @@ extension ErrorSpacerBinding on ErrorSpacer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ErrorSpacer');
+        return const HTType('ErrorSpacer');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -427,33 +484,49 @@ extension ErrorSpacerBinding on ErrorSpacer {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -468,16 +541,23 @@ class FlutterErrorDetailsAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => FlutterErrorDetails(
             exception: namedArgs['exception'],
             stack: namedArgs.containsKey('stack') ? namedArgs['stack'] : null,
-            library: namedArgs.containsKey('library') ? namedArgs['library'] : 'Flutter framework',
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            stackFilter: namedArgs.containsKey('stackFilter') ? namedArgs['stackFilter'] : null,
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null,
-            silent: namedArgs.containsKey('silent') ? namedArgs['silent'] : false);
+            library: namedArgs.containsKey('library')
+                ? namedArgs['library']
+                : 'Flutter framework',
+            context:
+                namedArgs.containsKey('context') ? namedArgs['context'] : null,
+            stackFilter: namedArgs.containsKey('stackFilter')
+                ? namedArgs['stackFilter']
+                : null,
+            informationCollector: namedArgs.containsKey('informationCollector')
+                ? namedArgs['informationCollector']
+                : null,
+            silent:
+                namedArgs.containsKey('silent') ? namedArgs['silent'] : false);
       case 'FlutterErrorDetails.propertiesTransformers':
         return FlutterErrorDetails.propertiesTransformers;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -488,8 +568,9 @@ class FlutterErrorDetailsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InformationCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Iterable<DiagnosticsNode>,
+      'InformationCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Iterable<DiagnosticsNode>,
     };
   }
 }
@@ -498,7 +579,7 @@ extension FlutterErrorDetailsBinding on FlutterErrorDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlutterErrorDetails');
+        return const HTType('FlutterErrorDetails');
       case 'exception':
         return exception;
       case 'stack':
@@ -517,29 +598,40 @@ extension FlutterErrorDetailsBinding on FlutterErrorDetails {
         return summary;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            exception: namedArgs.containsKey('exception') ? namedArgs['exception'] : null,
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null,
-            library: namedArgs.containsKey('library') ? namedArgs['library'] : null,
-            silent: namedArgs.containsKey('silent') ? namedArgs['silent'] : null,
+            context:
+                namedArgs.containsKey('context') ? namedArgs['context'] : null,
+            exception: namedArgs.containsKey('exception')
+                ? namedArgs['exception']
+                : null,
+            informationCollector: namedArgs.containsKey('informationCollector')
+                ? namedArgs['informationCollector']
+                : null,
+            library:
+                namedArgs.containsKey('library') ? namedArgs['library'] : null,
+            silent:
+                namedArgs.containsKey('silent') ? namedArgs['silent'] : null,
             stack: namedArgs.containsKey('stack') ? namedArgs['stack'] : null,
-            stackFilter: namedArgs.containsKey('stackFilter') ? namedArgs['stackFilter'] : null);
+            stackFilter: namedArgs.containsKey('stackFilter')
+                ? namedArgs['stackFilter']
+                : null);
       case 'exceptionAsString':
         return ({positionalArgs, namedArgs, typeArgs}) => exceptionAsString();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -551,21 +643,30 @@ class FlutterErrorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlutterError':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlutterError(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlutterError(positionalArgs[0]);
       case 'FlutterError.fromParts':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FlutterError.fromParts(List<DiagnosticsNode>.from(positionalArgs[0]));
+            FlutterError.fromParts(
+                List<DiagnosticsNode>.from(positionalArgs[0]));
       case 'FlutterError.resetErrorCount':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlutterError.resetErrorCount();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlutterError.resetErrorCount();
       case 'FlutterError.dumpErrorToConsole':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlutterError.dumpErrorToConsole(positionalArgs[0],
-            forceReport: namedArgs.containsKey('forceReport') ? namedArgs['forceReport'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlutterError.dumpErrorToConsole(positionalArgs[0],
+                forceReport: namedArgs.containsKey('forceReport')
+                    ? namedArgs['forceReport']
+                    : false);
       case 'FlutterError.addDefaultStackFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlutterError.addDefaultStackFilter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlutterError.addDefaultStackFilter(positionalArgs[0]);
       case 'FlutterError.defaultStackFilter':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlutterError.defaultStackFilter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlutterError.defaultStackFilter(positionalArgs[0]);
       case 'FlutterError.reportError':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlutterError.reportError(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlutterError.reportError(positionalArgs[0]);
       case 'FlutterError.onError':
         return FlutterError.onError;
       case 'FlutterError.demangleStackTrace':
@@ -575,12 +676,13 @@ class FlutterErrorAutoBinding extends HTExternalClass {
       case 'FlutterError.wrapWidth':
         return FlutterError.wrapWidth;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlutterError.onError':
         return FlutterError.onError = value;
@@ -589,7 +691,7 @@ class FlutterErrorAutoBinding extends HTExternalClass {
       case 'FlutterError.presentError':
         return FlutterError.presentError = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -603,35 +705,48 @@ extension FlutterErrorBinding on FlutterError {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlutterError');
+        return const HTType('FlutterError');
       case 'diagnostics':
         return diagnostics;
       case 'message':
         return message;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -643,15 +758,23 @@ class DiagnosticsStackTraceAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DiagnosticsStackTrace':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsStackTrace(positionalArgs[0], positionalArgs[1],
-            stackFilter: namedArgs.containsKey('stackFilter') ? namedArgs['stackFilter'] : null,
-            showSeparator: namedArgs.containsKey('showSeparator') ? namedArgs['showSeparator'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsStackTrace(
+            positionalArgs[0], positionalArgs[1],
+            stackFilter: namedArgs.containsKey('stackFilter')
+                ? namedArgs['stackFilter']
+                : null,
+            showSeparator: namedArgs.containsKey('showSeparator')
+                ? namedArgs['showSeparator']
+                : true);
       case 'DiagnosticsStackTrace.singleFrame':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsStackTrace.singleFrame(positionalArgs[0],
-            frame: namedArgs['frame'],
-            showSeparator: namedArgs.containsKey('showSeparator') ? namedArgs['showSeparator'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DiagnosticsStackTrace.singleFrame(positionalArgs[0],
+                frame: namedArgs['frame'],
+                showSeparator: namedArgs.containsKey('showSeparator')
+                    ? namedArgs['showSeparator']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -665,7 +788,7 @@ extension DiagnosticsStackTraceBinding on DiagnosticsStackTrace {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticsStackTrace');
+        return const HTType('DiagnosticsStackTrace');
       case 'level':
         return level;
       case 'value':
@@ -694,24 +817,39 @@ extension DiagnosticsStackTraceBinding on DiagnosticsStackTrace {
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/change_notifier.g.dart b/lib/bindings/flutter/foundation/change_notifier.g.dart
index a76bb05..e5d1c6a 100644
--- a/lib/bindings/flutter/foundation/change_notifier.g.dart
+++ b/lib/bindings/flutter/foundation/change_notifier.g.dart
@@ -8,9 +8,10 @@ class ListenableAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Listenable.merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => Listenable.merge(List<Listenable?>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Listenable.merge(List<Listenable?>.from(positionalArgs[0]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,7 +22,8 @@ class ListenableAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -30,13 +32,15 @@ extension ListenableBinding on Listenable {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Listenable');
+        return const HTType('Listenable');
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,7 +54,7 @@ class ChangeNotifierAutoBinding extends HTExternalClass {
       case 'ChangeNotifier':
         return ({positionalArgs, namedArgs, typeArgs}) => ChangeNotifier();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -61,7 +65,8 @@ class ChangeNotifierAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -70,15 +75,17 @@ extension ChangeNotifierBinding on ChangeNotifier {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ChangeNotifier');
+        return const HTType('ChangeNotifier');
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/diagnostics.g.dart b/lib/bindings/flutter/foundation/diagnostics.g.dart
index 778d40b..4f41d0c 100644
--- a/lib/bindings/flutter/foundation/diagnostics.g.dart
+++ b/lib/bindings/flutter/foundation/diagnostics.g.dart
@@ -34,7 +34,7 @@ class DiagnosticLevelAutoBinding extends HTExternalClass {
       case 'DiagnosticLevel.off':
         return DiagnosticLevel.off;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -42,13 +42,14 @@ class DiagnosticLevelAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticLevel');
+        return const HTType('DiagnosticLevel');
       case 'index':
         return (instance as DiagnosticLevel).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DiagnosticLevel).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DiagnosticLevel).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -86,7 +87,7 @@ class DiagnosticsTreeStyleAutoBinding extends HTExternalClass {
       case 'DiagnosticsTreeStyle.truncateChildren':
         return DiagnosticsTreeStyle.truncateChildren;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -94,13 +95,14 @@ class DiagnosticsTreeStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticsTreeStyle');
+        return const HTType('DiagnosticsTreeStyle');
       case 'index':
         return (instance as DiagnosticsTreeStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DiagnosticsTreeStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DiagnosticsTreeStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -120,31 +122,59 @@ class TextTreeConfigurationAutoBinding extends HTExternalClass {
             linkCharacter: namedArgs['linkCharacter'],
             propertyPrefixIfChildren: namedArgs['propertyPrefixIfChildren'],
             propertyPrefixNoChildren: namedArgs['propertyPrefixNoChildren'],
-            lineBreak: namedArgs.containsKey('lineBreak') ? namedArgs['lineBreak'] : '\n',
-            lineBreakProperties: namedArgs.containsKey('lineBreakProperties') ? namedArgs['lineBreakProperties'] : true,
-            afterName: namedArgs.containsKey('afterName') ? namedArgs['afterName'] : ':',
-            afterDescriptionIfBody:
-                namedArgs.containsKey('afterDescriptionIfBody') ? namedArgs['afterDescriptionIfBody'] : '',
-            afterDescription: namedArgs.containsKey('afterDescription') ? namedArgs['afterDescription'] : '',
-            beforeProperties: namedArgs.containsKey('beforeProperties') ? namedArgs['beforeProperties'] : '',
-            afterProperties: namedArgs.containsKey('afterProperties') ? namedArgs['afterProperties'] : '',
-            mandatoryAfterProperties:
-                namedArgs.containsKey('mandatoryAfterProperties') ? namedArgs['mandatoryAfterProperties'] : '',
-            propertySeparator: namedArgs.containsKey('propertySeparator') ? namedArgs['propertySeparator'] : '',
-            bodyIndent: namedArgs.containsKey('bodyIndent') ? namedArgs['bodyIndent'] : '',
+            lineBreak: namedArgs.containsKey('lineBreak')
+                ? namedArgs['lineBreak']
+                : '\n',
+            lineBreakProperties: namedArgs.containsKey('lineBreakProperties')
+                ? namedArgs['lineBreakProperties']
+                : true,
+            afterName: namedArgs.containsKey('afterName')
+                ? namedArgs['afterName']
+                : ':',
+            afterDescriptionIfBody: namedArgs.containsKey('afterDescriptionIfBody')
+                ? namedArgs['afterDescriptionIfBody']
+                : '',
+            afterDescription: namedArgs.containsKey('afterDescription')
+                ? namedArgs['afterDescription']
+                : '',
+            beforeProperties: namedArgs.containsKey('beforeProperties')
+                ? namedArgs['beforeProperties']
+                : '',
+            afterProperties: namedArgs.containsKey('afterProperties')
+                ? namedArgs['afterProperties']
+                : '',
+            mandatoryAfterProperties: namedArgs.containsKey('mandatoryAfterProperties')
+                ? namedArgs['mandatoryAfterProperties']
+                : '',
+            propertySeparator: namedArgs.containsKey('propertySeparator')
+                ? namedArgs['propertySeparator']
+                : '',
+            bodyIndent: namedArgs.containsKey('bodyIndent')
+                ? namedArgs['bodyIndent']
+                : '',
             footer: namedArgs.containsKey('footer') ? namedArgs['footer'] : '',
-            showChildren: namedArgs.containsKey('showChildren') ? namedArgs['showChildren'] : true,
-            addBlankLineIfNoChildren:
-                namedArgs.containsKey('addBlankLineIfNoChildren') ? namedArgs['addBlankLineIfNoChildren'] : true,
-            isNameOnOwnLine: namedArgs.containsKey('isNameOnOwnLine') ? namedArgs['isNameOnOwnLine'] : false,
-            isBlankLineBetweenPropertiesAndChildren: namedArgs.containsKey('isBlankLineBetweenPropertiesAndChildren')
-                ? namedArgs['isBlankLineBetweenPropertiesAndChildren']
+            showChildren: namedArgs.containsKey('showChildren')
+                ? namedArgs['showChildren']
                 : true,
-            beforeName: namedArgs.containsKey('beforeName') ? namedArgs['beforeName'] : '',
-            suffixLineOne: namedArgs.containsKey('suffixLineOne') ? namedArgs['suffixLineOne'] : '',
+            addBlankLineIfNoChildren: namedArgs.containsKey('addBlankLineIfNoChildren')
+                ? namedArgs['addBlankLineIfNoChildren']
+                : true,
+            isNameOnOwnLine: namedArgs.containsKey('isNameOnOwnLine')
+                ? namedArgs['isNameOnOwnLine']
+                : false,
+            isBlankLineBetweenPropertiesAndChildren:
+                namedArgs.containsKey('isBlankLineBetweenPropertiesAndChildren')
+                    ? namedArgs['isBlankLineBetweenPropertiesAndChildren']
+                    : true,
+            beforeName: namedArgs.containsKey('beforeName')
+                ? namedArgs['beforeName']
+                : '',
+            suffixLineOne: namedArgs.containsKey('suffixLineOne')
+                ? namedArgs['suffixLineOne']
+                : '',
             mandatoryFooter: namedArgs.containsKey('mandatoryFooter') ? namedArgs['mandatoryFooter'] : '');
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -158,7 +188,7 @@ extension TextTreeConfigurationBinding on TextTreeConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextTreeConfiguration');
+        return const HTType('TextTreeConfiguration');
       case 'prefixLineOne':
         return prefixLineOne;
       case 'suffixLineOne':
@@ -212,7 +242,7 @@ extension TextTreeConfigurationBinding on TextTreeConfiguration {
       case 'isBlankLineBetweenPropertiesAndChildren':
         return isBlankLineBetweenPropertiesAndChildren;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -225,14 +255,21 @@ class TextTreeRendererAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TextTreeRenderer':
         return ({positionalArgs, namedArgs, typeArgs}) => TextTreeRenderer(
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug,
-            wrapWidth: namedArgs.containsKey('wrapWidth') ? namedArgs['wrapWidth'] : 100,
-            wrapWidthProperties: namedArgs.containsKey('wrapWidthProperties') ? namedArgs['wrapWidthProperties'] : 65,
-            maxDescendentsTruncatableNode: namedArgs.containsKey('maxDescendentsTruncatableNode')
-                ? namedArgs['maxDescendentsTruncatableNode']
-                : -1);
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug,
+            wrapWidth: namedArgs.containsKey('wrapWidth')
+                ? namedArgs['wrapWidth']
+                : 100,
+            wrapWidthProperties: namedArgs.containsKey('wrapWidthProperties')
+                ? namedArgs['wrapWidthProperties']
+                : 65,
+            maxDescendentsTruncatableNode:
+                namedArgs.containsKey('maxDescendentsTruncatableNode')
+                    ? namedArgs['maxDescendentsTruncatableNode']
+                    : -1);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -246,15 +283,21 @@ extension TextTreeRendererBinding on TextTreeRenderer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextTreeRenderer');
+        return const HTType('TextTreeRenderer');
       case 'render':
-        return ({positionalArgs, namedArgs, typeArgs}) => render(positionalArgs[0],
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => render(
+            positionalArgs[0],
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -266,15 +309,25 @@ class DiagnosticsNodeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DiagnosticsNode.message':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsNode.message(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.singleLine,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info,
-            allowWrap: namedArgs.containsKey('allowWrap') ? namedArgs['allowWrap'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DiagnosticsNode.message(positionalArgs[0],
+                style: namedArgs.containsKey('style')
+                    ? namedArgs['style']
+                    : DiagnosticsTreeStyle.singleLine,
+                level: namedArgs.containsKey('level')
+                    ? namedArgs['level']
+                    : DiagnosticLevel.info,
+                allowWrap: namedArgs.containsKey('allowWrap')
+                    ? namedArgs['allowWrap']
+                    : true);
       case 'DiagnosticsNode.toJsonList':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsNode.toJsonList(
-            List<DiagnosticsNode>.from(positionalArgs[0]), positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DiagnosticsNode.toJsonList(
+                List<DiagnosticsNode>.from(positionalArgs[0]),
+                positionalArgs[1],
+                positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -288,7 +341,7 @@ extension DiagnosticsNodeBinding on DiagnosticsNode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticsNode');
+        return const HTType('DiagnosticsNode');
       case 'name':
         return name;
       case 'showSeparator':
@@ -313,28 +366,43 @@ extension DiagnosticsNodeBinding on DiagnosticsNode {
         return allowTruncate;
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -346,11 +414,16 @@ class MessagePropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MessageProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => MessageProperty(positionalArgs[0], positionalArgs[1],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.singleLine,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => MessageProperty(
+            positionalArgs[0], positionalArgs[1],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.singleLine,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -364,7 +437,7 @@ extension MessagePropertyBinding on MessageProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MessageProperty');
+        return const HTType('MessageProperty');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -404,33 +477,49 @@ extension MessagePropertyBinding on MessageProperty {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -442,17 +531,31 @@ class StringPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StringProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => StringProperty(positionalArgs[0], positionalArgs[1],
-            description: namedArgs.containsKey('description') ? namedArgs['description'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : kNoDefaultValue,
-            quoted: namedArgs.containsKey('quoted') ? namedArgs['quoted'] : true,
-            ifEmpty: namedArgs.containsKey('ifEmpty') ? namedArgs['ifEmpty'] : null,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.singleLine,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => StringProperty(
+            positionalArgs[0], positionalArgs[1],
+            description: namedArgs.containsKey('description')
+                ? namedArgs['description']
+                : null,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : kNoDefaultValue,
+            quoted:
+                namedArgs.containsKey('quoted') ? namedArgs['quoted'] : true,
+            ifEmpty:
+                namedArgs.containsKey('ifEmpty') ? namedArgs['ifEmpty'] : null,
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.singleLine,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -466,7 +569,7 @@ extension StringPropertyBinding on StringProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StringProperty');
+        return const HTType('StringProperty');
       case 'quoted':
         return quoted;
       case 'expandableValue':
@@ -508,33 +611,49 @@ extension StringPropertyBinding on StringProperty {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -546,24 +665,44 @@ class DoublePropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DoubleProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => DoubleProperty(positionalArgs[0], positionalArgs[1],
-            ifNull: namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => DoubleProperty(
+            positionalArgs[0], positionalArgs[1],
+            ifNull:
+                namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
             unit: namedArgs.containsKey('unit') ? namedArgs['unit'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : kNoDefaultValue,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.singleLine,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : kNoDefaultValue,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.singleLine,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       case 'DoubleProperty.lazy':
-        return ({positionalArgs, namedArgs, typeArgs}) => DoubleProperty.lazy(positionalArgs[0], positionalArgs[1],
-            ifNull: namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
+        return ({positionalArgs, namedArgs, typeArgs}) => DoubleProperty.lazy(
+            positionalArgs[0], positionalArgs[1],
+            ifNull:
+                namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
             unit: namedArgs.containsKey('unit') ? namedArgs['unit'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : kNoDefaultValue,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : kNoDefaultValue,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -577,7 +716,7 @@ extension DoublePropertyBinding on DoubleProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DoubleProperty');
+        return const HTType('DoubleProperty');
       case 'unit':
         return unit;
       case 'expandableValue':
@@ -621,33 +760,49 @@ extension DoublePropertyBinding on DoubleProperty {
       case 'numberToString':
         return ({positionalArgs, namedArgs, typeArgs}) => numberToString();
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -659,15 +814,25 @@ class IntPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IntProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => IntProperty(positionalArgs[0], positionalArgs[1],
-            ifNull: namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
+        return ({positionalArgs, namedArgs, typeArgs}) => IntProperty(
+            positionalArgs[0], positionalArgs[1],
+            ifNull:
+                namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
             unit: namedArgs.containsKey('unit') ? namedArgs['unit'] : null,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : kNoDefaultValue,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.singleLine,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : kNoDefaultValue,
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.singleLine,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -681,7 +846,7 @@ extension IntPropertyBinding on IntProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IntProperty');
+        return const HTType('IntProperty');
       case 'unit':
         return unit;
       case 'expandableValue':
@@ -725,33 +890,49 @@ extension IntPropertyBinding on IntProperty {
       case 'numberToString':
         return ({positionalArgs, namedArgs, typeArgs}) => numberToString();
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -763,14 +944,21 @@ class PercentPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PercentProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => PercentProperty(positionalArgs[0], positionalArgs[1],
-            ifNull: namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => PercentProperty(
+            positionalArgs[0], positionalArgs[1],
+            ifNull:
+                namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
             unit: namedArgs.containsKey('unit') ? namedArgs['unit'] : null,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -784,7 +972,7 @@ extension PercentPropertyBinding on PercentProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PercentProperty');
+        return const HTType('PercentProperty');
       case 'unit':
         return unit;
       case 'expandableValue':
@@ -827,34 +1015,50 @@ extension PercentPropertyBinding on PercentProperty {
         return allowTruncate;
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'numberToString':
         return ({positionalArgs, namedArgs, typeArgs}) => numberToString();
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -866,15 +1070,24 @@ class FlagPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlagProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlagProperty(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => FlagProperty(
+            positionalArgs[0],
             value: namedArgs['value'],
-            ifTrue: namedArgs.containsKey('ifTrue') ? namedArgs['ifTrue'] : null,
-            ifFalse: namedArgs.containsKey('ifFalse') ? namedArgs['ifFalse'] : null,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : false,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : null,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+            ifTrue:
+                namedArgs.containsKey('ifTrue') ? namedArgs['ifTrue'] : null,
+            ifFalse:
+                namedArgs.containsKey('ifFalse') ? namedArgs['ifFalse'] : null,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : false,
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : null,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -888,7 +1101,7 @@ extension FlagPropertyBinding on FlagProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlagProperty');
+        return const HTType('FlagProperty');
       case 'ifTrue':
         return ifTrue;
       case 'ifFalse':
@@ -932,33 +1145,49 @@ extension FlagPropertyBinding on FlagProperty {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -970,12 +1199,13 @@ class DiagnosticableTreeNodeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DiagnosticableTreeNode':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticableTreeNode(
-            name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
-            value: namedArgs['value'],
-            style: namedArgs['style']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DiagnosticableTreeNode(
+                name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
+                value: namedArgs['value'],
+                style: namedArgs['style']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -989,7 +1219,7 @@ extension DiagnosticableTreeNodeBinding on DiagnosticableTreeNode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticableTreeNode');
+        return const HTType('DiagnosticableTreeNode');
       case 'value':
         return value;
       case 'name':
@@ -1020,41 +1250,59 @@ extension DiagnosticableTreeNodeBinding on DiagnosticableTreeNode {
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DiagnosticPropertiesBuilderAutoBinding extends HTExternalClass {
-  DiagnosticPropertiesBuilderAutoBinding() : super('DiagnosticPropertiesBuilder');
+  DiagnosticPropertiesBuilderAutoBinding()
+      : super('DiagnosticPropertiesBuilder');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DiagnosticPropertiesBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticPropertiesBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DiagnosticPropertiesBuilder();
       case 'DiagnosticPropertiesBuilder.fromProperties':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            DiagnosticPropertiesBuilder.fromProperties(List<DiagnosticsNode>.from(positionalArgs[0]));
+            DiagnosticPropertiesBuilder.fromProperties(
+                List<DiagnosticsNode>.from(positionalArgs[0]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1073,7 +1321,7 @@ extension DiagnosticPropertiesBuilderBinding on DiagnosticPropertiesBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticPropertiesBuilder');
+        return const HTType('DiagnosticPropertiesBuilder');
       case 'properties':
         return properties;
       case 'defaultDiagnosticsTreeStyle':
@@ -1081,9 +1329,10 @@ extension DiagnosticPropertiesBuilderBinding on DiagnosticPropertiesBuilder {
       case 'emptyBodyDescription':
         return emptyBodyDescription;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1096,7 +1345,7 @@ extension DiagnosticPropertiesBuilderBinding on DiagnosticPropertiesBuilder {
         emptyBodyDescription = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1110,14 +1359,28 @@ class DiagnosticsBlockAutoBinding extends HTExternalClass {
       case 'DiagnosticsBlock':
         return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsBlock(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.whitespace,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            showSeparator: namedArgs.containsKey('showSeparator') ? namedArgs['showSeparator'] : true,
-            linePrefix: namedArgs.containsKey('linePrefix') ? namedArgs['linePrefix'] : null,
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.whitespace,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            showSeparator: namedArgs.containsKey('showSeparator')
+                ? namedArgs['showSeparator']
+                : true,
+            linePrefix: namedArgs.containsKey('linePrefix')
+                ? namedArgs['linePrefix']
+                : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            description: namedArgs.containsKey('description') ? namedArgs['description'] : null,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info,
-            allowTruncate: namedArgs.containsKey('allowTruncate') ? namedArgs['allowTruncate'] : false,
+            description: namedArgs.containsKey('description')
+                ? namedArgs['description']
+                : null,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info,
+            allowTruncate: namedArgs.containsKey('allowTruncate')
+                ? namedArgs['allowTruncate']
+                : false,
             children: namedArgs.containsKey('children')
                 ? List<DiagnosticsNode>.from(namedArgs['children'])
                 : const <DiagnosticsNode>[],
@@ -1125,7 +1388,7 @@ class DiagnosticsBlockAutoBinding extends HTExternalClass {
                 ? List<DiagnosticsNode>.from(namedArgs['properties'])
                 : const <DiagnosticsNode>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1139,7 +1402,7 @@ extension DiagnosticsBlockBinding on DiagnosticsBlock {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticsBlock');
+        return const HTType('DiagnosticsBlock');
       case 'level':
         return level;
       case 'value':
@@ -1168,40 +1431,61 @@ extension DiagnosticsBlockBinding on DiagnosticsBlock {
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DiagnosticsSerializationDelegateAutoBinding extends HTExternalClass {
-  DiagnosticsSerializationDelegateAutoBinding() : super('DiagnosticsSerializationDelegate');
+  DiagnosticsSerializationDelegateAutoBinding()
+      : super('DiagnosticsSerializationDelegate');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DiagnosticsSerializationDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsSerializationDelegate(
-            subtreeDepth: namedArgs.containsKey('subtreeDepth') ? namedArgs['subtreeDepth'] : null,
-            includeProperties: namedArgs.containsKey('includeProperties') ? namedArgs['includeProperties'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DiagnosticsSerializationDelegate(
+                subtreeDepth: namedArgs.containsKey('subtreeDepth')
+                    ? namedArgs['subtreeDepth']
+                    : null,
+                includeProperties: namedArgs.containsKey('includeProperties')
+                    ? namedArgs['includeProperties']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1211,11 +1495,12 @@ class DiagnosticsSerializationDelegateAutoBinding extends HTExternalClass {
   }
 }
 
-extension DiagnosticsSerializationDelegateBinding on DiagnosticsSerializationDelegate {
+extension DiagnosticsSerializationDelegateBinding
+    on DiagnosticsSerializationDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticsSerializationDelegate');
+        return const HTType('DiagnosticsSerializationDelegate');
       case 'subtreeDepth':
         return subtreeDepth;
       case 'includeProperties':
@@ -1223,24 +1508,30 @@ extension DiagnosticsSerializationDelegateBinding on DiagnosticsSerializationDel
       case 'expandPropertyValues':
         return expandPropertyValues;
       case 'additionalNodeProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => additionalNodeProperties(positionalArgs[0]);
-      case 'filterChildren':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            filterChildren(List<DiagnosticsNode>.from(positionalArgs[0]), positionalArgs[1]);
+            additionalNodeProperties(positionalArgs[0]);
+      case 'filterChildren':
+        return ({positionalArgs, namedArgs, typeArgs}) => filterChildren(
+            List<DiagnosticsNode>.from(positionalArgs[0]), positionalArgs[1]);
       case 'filterProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            filterProperties(List<DiagnosticsNode>.from(positionalArgs[0]), positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) => filterProperties(
+            List<DiagnosticsNode>.from(positionalArgs[0]), positionalArgs[1]);
       case 'truncateNodesList':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            truncateNodesList(List<DiagnosticsNode>.from(positionalArgs[0]), positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) => truncateNodesList(
+            List<DiagnosticsNode>.from(positionalArgs[0]), positionalArgs[1]);
       case 'delegateForNode':
-        return ({positionalArgs, namedArgs, typeArgs}) => delegateForNode(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            delegateForNode(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            subtreeDepth: namedArgs.containsKey('subtreeDepth') ? namedArgs['subtreeDepth'] : null,
-            includeProperties: namedArgs.containsKey('includeProperties') ? namedArgs['includeProperties'] : null);
+            subtreeDepth: namedArgs.containsKey('subtreeDepth')
+                ? namedArgs['subtreeDepth']
+                : null,
+            includeProperties: namedArgs.containsKey('includeProperties')
+                ? namedArgs['includeProperties']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/key.g.dart b/lib/bindings/flutter/foundation/key.g.dart
index 3bbb521..8a7efcf 100644
--- a/lib/bindings/flutter/foundation/key.g.dart
+++ b/lib/bindings/flutter/foundation/key.g.dart
@@ -8,9 +8,10 @@ class KeyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Key':
-        return ({positionalArgs, namedArgs, typeArgs}) => Key(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Key(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/licenses.g.dart b/lib/bindings/flutter/foundation/licenses.g.dart
index 85d0695..29b02fd 100644
--- a/lib/bindings/flutter/foundation/licenses.g.dart
+++ b/lib/bindings/flutter/foundation/licenses.g.dart
@@ -8,11 +8,12 @@ class LicenseParagraphAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LicenseParagraph':
-        return ({positionalArgs, namedArgs, typeArgs}) => LicenseParagraph(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LicenseParagraph(positionalArgs[0], positionalArgs[1]);
       case 'LicenseParagraph.centeredIndent':
         return LicenseParagraph.centeredIndent;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +27,13 @@ extension LicenseParagraphBinding on LicenseParagraph {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LicenseParagraph');
+        return const HTType('LicenseParagraph');
       case 'text':
         return text;
       case 'indent':
         return indent;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,9 +46,10 @@ class LicenseEntryWithLineBreaksAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'LicenseEntryWithLineBreaks':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            LicenseEntryWithLineBreaks(List<String>.from(positionalArgs[0]), positionalArgs[1]);
+            LicenseEntryWithLineBreaks(
+                List<String>.from(positionalArgs[0]), positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -61,7 +63,7 @@ extension LicenseEntryWithLineBreaksBinding on LicenseEntryWithLineBreaks {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LicenseEntryWithLineBreaks');
+        return const HTType('LicenseEntryWithLineBreaks');
       case 'packages':
         return packages;
       case 'text':
@@ -69,7 +71,7 @@ extension LicenseEntryWithLineBreaksBinding on LicenseEntryWithLineBreaks {
       case 'paragraphs':
         return paragraphs;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -81,18 +83,20 @@ class LicenseRegistryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LicenseRegistry.addLicense':
-        return ({positionalArgs, namedArgs, typeArgs}) => LicenseRegistry.addLicense(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LicenseRegistry.addLicense(positionalArgs[0]);
       case 'LicenseRegistry.licenses':
         return LicenseRegistry.licenses;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'LicenseEntryCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Stream<LicenseEntry>,
+      'LicenseEntryCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Stream<LicenseEntry>,
     };
   }
 }
diff --git a/lib/bindings/flutter/foundation/node.g.dart b/lib/bindings/flutter/foundation/node.g.dart
index 5f69c88..f4c6e2c 100644
--- a/lib/bindings/flutter/foundation/node.g.dart
+++ b/lib/bindings/flutter/foundation/node.g.dart
@@ -10,7 +10,7 @@ class AbstractNodeAutoBinding extends HTExternalClass {
       case 'AbstractNode':
         return ({positionalArgs, namedArgs, typeArgs}) => AbstractNode();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +24,7 @@ extension AbstractNodeBinding on AbstractNode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AbstractNode');
+        return const HTType('AbstractNode');
       case 'depth':
         return depth;
       case 'owner':
@@ -36,11 +36,12 @@ extension AbstractNodeBinding on AbstractNode {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/platform.g.dart b/lib/bindings/flutter/foundation/platform.g.dart
index 498ba28..3a00485 100644
--- a/lib/bindings/flutter/foundation/platform.g.dart
+++ b/lib/bindings/flutter/foundation/platform.g.dart
@@ -22,7 +22,7 @@ class TargetPlatformAutoBinding extends HTExternalClass {
       case 'TargetPlatform.windows':
         return TargetPlatform.windows;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,13 +30,14 @@ class TargetPlatformAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TargetPlatform');
+        return const HTType('TargetPlatform');
       case 'index':
         return (instance as TargetPlatform).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TargetPlatform).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TargetPlatform).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/serialization.g.dart b/lib/bindings/flutter/foundation/serialization.g.dart
index bd8ae0a..884526f 100644
--- a/lib/bindings/flutter/foundation/serialization.g.dart
+++ b/lib/bindings/flutter/foundation/serialization.g.dart
@@ -10,7 +10,7 @@ class WriteBufferAutoBinding extends HTExternalClass {
       case 'WriteBuffer':
         return ({positionalArgs, namedArgs, typeArgs}) => WriteBuffer();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,36 +24,51 @@ extension WriteBufferBinding on WriteBuffer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WriteBuffer');
+        return const HTType('WriteBuffer');
       case 'putUint8':
-        return ({positionalArgs, namedArgs, typeArgs}) => putUint8(positionalArgs[0]);
-      case 'putUint16':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            putUint16(positionalArgs[0], endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+            putUint8(positionalArgs[0]);
+      case 'putUint16':
+        return ({positionalArgs, namedArgs, typeArgs}) => putUint16(
+            positionalArgs[0],
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'putUint32':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            putUint32(positionalArgs[0], endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => putUint32(
+            positionalArgs[0],
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'putInt32':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            putInt32(positionalArgs[0], endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => putInt32(
+            positionalArgs[0],
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'putInt64':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            putInt64(positionalArgs[0], endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => putInt64(
+            positionalArgs[0],
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'putFloat64':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            putFloat64(positionalArgs[0], endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => putFloat64(
+            positionalArgs[0],
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'putUint8List':
-        return ({positionalArgs, namedArgs, typeArgs}) => putUint8List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            putUint8List(positionalArgs[0]);
       case 'putInt32List':
-        return ({positionalArgs, namedArgs, typeArgs}) => putInt32List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            putInt32List(positionalArgs[0]);
       case 'putInt64List':
-        return ({positionalArgs, namedArgs, typeArgs}) => putInt64List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            putInt64List(positionalArgs[0]);
       case 'putFloat64List':
-        return ({positionalArgs, namedArgs, typeArgs}) => putFloat64List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            putFloat64List(positionalArgs[0]);
       case 'done':
         return ({positionalArgs, namedArgs, typeArgs}) => done();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -65,9 +80,10 @@ class ReadBufferAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ReadBuffer':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReadBuffer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReadBuffer(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -81,7 +97,7 @@ extension ReadBufferBinding on ReadBuffer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReadBuffer');
+        return const HTType('ReadBuffer');
       case 'data':
         return data;
       case 'hasRemaining':
@@ -89,30 +105,39 @@ extension ReadBufferBinding on ReadBuffer {
       case 'getUint8':
         return ({positionalArgs, namedArgs, typeArgs}) => getUint8();
       case 'getUint16':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            getUint16(endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getUint16(
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'getUint32':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            getUint32(endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getUint32(
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'getInt32':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            getInt32(endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInt32(
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'getInt64':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            getInt64(endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInt64(
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'getFloat64':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            getFloat64(endian: namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getFloat64(
+            endian:
+                namedArgs.containsKey('endian') ? namedArgs['endian'] : null);
       case 'getUint8List':
-        return ({positionalArgs, namedArgs, typeArgs}) => getUint8List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getUint8List(positionalArgs[0]);
       case 'getInt32List':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInt32List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getInt32List(positionalArgs[0]);
       case 'getInt64List':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInt64List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getInt64List(positionalArgs[0]);
       case 'getFloat64List':
-        return ({positionalArgs, namedArgs, typeArgs}) => getFloat64List(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getFloat64List(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/stack_frame.g.dart b/lib/bindings/flutter/foundation/stack_frame.g.dart
index 8832aa6..598e102 100644
--- a/lib/bindings/flutter/foundation/stack_frame.g.dart
+++ b/lib/bindings/flutter/foundation/stack_frame.g.dart
@@ -15,22 +15,29 @@ class StackFrameAutoBinding extends HTExternalClass {
             packageScheme: namedArgs['packageScheme'],
             package: namedArgs['package'],
             packagePath: namedArgs['packagePath'],
-            className: namedArgs.containsKey('className') ? namedArgs['className'] : '',
+            className: namedArgs.containsKey('className')
+                ? namedArgs['className']
+                : '',
             method: namedArgs['method'],
-            isConstructor: namedArgs.containsKey('isConstructor') ? namedArgs['isConstructor'] : false,
+            isConstructor: namedArgs.containsKey('isConstructor')
+                ? namedArgs['isConstructor']
+                : false,
             source: namedArgs['source']);
       case 'StackFrame.fromStackTrace':
-        return ({positionalArgs, namedArgs, typeArgs}) => StackFrame.fromStackTrace(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StackFrame.fromStackTrace(positionalArgs[0]);
       case 'StackFrame.fromStackString':
-        return ({positionalArgs, namedArgs, typeArgs}) => StackFrame.fromStackString(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StackFrame.fromStackString(positionalArgs[0]);
       case 'StackFrame.fromStackTraceLine':
-        return ({positionalArgs, namedArgs, typeArgs}) => StackFrame.fromStackTraceLine(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StackFrame.fromStackTraceLine(positionalArgs[0]);
       case 'StackFrame.asynchronousSuspension':
         return StackFrame.asynchronousSuspension;
       case 'StackFrame.stackOverFlowElision':
         return StackFrame.stackOverFlowElision;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,7 +51,7 @@ extension StackFrameBinding on StackFrame {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StackFrame');
+        return const HTType('StackFrame');
       case 'source':
         return source;
       case 'number':
@@ -70,7 +77,7 @@ extension StackFrameBinding on StackFrame {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/foundation/unicode.g.dart b/lib/bindings/flutter/foundation/unicode.g.dart
index a6c3dd0..b4befce 100644
--- a/lib/bindings/flutter/foundation/unicode.g.dart
+++ b/lib/bindings/flutter/foundation/unicode.g.dart
@@ -1,7 +1,6 @@
 import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/foundation.dart';
 
-
 class UnicodeAutoBinding extends HTExternalClass {
   UnicodeAutoBinding() : super('Unicode');
 
@@ -33,13 +32,7 @@ class UnicodeAutoBinding extends HTExternalClass {
       case 'Unicode.ALM':
         return Unicode.ALM;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
-
-
-
-
 }
-
-
diff --git a/lib/bindings/flutter/gestures/arena.g.dart b/lib/bindings/flutter/gestures/arena.g.dart
index 0f9aabb..67bdddd 100644
--- a/lib/bindings/flutter/gestures/arena.g.dart
+++ b/lib/bindings/flutter/gestures/arena.g.dart
@@ -14,7 +14,7 @@ class GestureDispositionAutoBinding extends HTExternalClass {
       case 'GestureDisposition.rejected':
         return GestureDisposition.rejected;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class GestureDispositionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GestureDisposition');
+        return const HTType('GestureDisposition');
       case 'index':
         return (instance as GestureDisposition).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as GestureDisposition).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as GestureDisposition).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,7 +43,7 @@ class GestureArenaManagerAutoBinding extends HTExternalClass {
       case 'GestureArenaManager':
         return ({positionalArgs, namedArgs, typeArgs}) => GestureArenaManager();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -56,19 +57,24 @@ extension GestureArenaManagerBinding on GestureArenaManager {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GestureArenaManager');
+        return const HTType('GestureArenaManager');
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0], positionalArgs[1]);
       case 'close':
-        return ({positionalArgs, namedArgs, typeArgs}) => close(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            close(positionalArgs[0]);
       case 'sweep':
-        return ({positionalArgs, namedArgs, typeArgs}) => sweep(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sweep(positionalArgs[0]);
       case 'hold':
-        return ({positionalArgs, namedArgs, typeArgs}) => hold(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hold(positionalArgs[0]);
       case 'release':
-        return ({positionalArgs, namedArgs, typeArgs}) => release(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            release(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/binding.g.dart b/lib/bindings/flutter/gestures/binding.g.dart
index a084c51..d20b374 100644
--- a/lib/bindings/flutter/gestures/binding.g.dart
+++ b/lib/bindings/flutter/gestures/binding.g.dart
@@ -2,46 +2,64 @@ import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/foundation.dart';
 
-class FlutterErrorDetailsForPointerEventDispatcherAutoBinding extends HTExternalClass {
-  FlutterErrorDetailsForPointerEventDispatcherAutoBinding() : super('FlutterErrorDetailsForPointerEventDispatcher');
+class FlutterErrorDetailsForPointerEventDispatcherAutoBinding
+    extends HTExternalClass {
+  FlutterErrorDetailsForPointerEventDispatcherAutoBinding()
+      : super('FlutterErrorDetailsForPointerEventDispatcher');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlutterErrorDetailsForPointerEventDispatcher':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlutterErrorDetailsForPointerEventDispatcher(
-            exception: namedArgs['exception'],
-            stack: namedArgs.containsKey('stack') ? namedArgs['stack'] : null,
-            library: namedArgs.containsKey('library') ? namedArgs['library'] : null,
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            event: namedArgs.containsKey('event') ? namedArgs['event'] : null,
-            hitTestEntry: namedArgs.containsKey('hitTestEntry') ? namedArgs['hitTestEntry'] : null,
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null,
-            silent: namedArgs.containsKey('silent') ? namedArgs['silent'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlutterErrorDetailsForPointerEventDispatcher(
+                exception: namedArgs['exception'],
+                stack:
+                    namedArgs.containsKey('stack') ? namedArgs['stack'] : null,
+                library: namedArgs.containsKey('library')
+                    ? namedArgs['library']
+                    : null,
+                context: namedArgs.containsKey('context')
+                    ? namedArgs['context']
+                    : null,
+                event:
+                    namedArgs.containsKey('event') ? namedArgs['event'] : null,
+                hitTestEntry: namedArgs.containsKey('hitTestEntry')
+                    ? namedArgs['hitTestEntry']
+                    : null,
+                informationCollector:
+                    namedArgs.containsKey('informationCollector')
+                        ? namedArgs['informationCollector']
+                        : null,
+                silent: namedArgs.containsKey('silent')
+                    ? namedArgs['silent']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
   dynamic instanceMemberGet(dynamic instance, String id) {
-    return (instance as FlutterErrorDetailsForPointerEventDispatcher).htFetch(id);
+    return (instance as FlutterErrorDetailsForPointerEventDispatcher)
+        .htFetch(id);
   }
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InformationCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Iterable<DiagnosticsNode>,
+      'InformationCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Iterable<DiagnosticsNode>,
     };
   }
 }
 
-extension FlutterErrorDetailsForPointerEventDispatcherBinding on FlutterErrorDetailsForPointerEventDispatcher {
+extension FlutterErrorDetailsForPointerEventDispatcherBinding
+    on FlutterErrorDetailsForPointerEventDispatcher {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlutterErrorDetailsForPointerEventDispatcher');
+        return const HTType('FlutterErrorDetailsForPointerEventDispatcher');
       case 'event':
         return event;
       case 'hitTestEntry':
@@ -64,29 +82,40 @@ extension FlutterErrorDetailsForPointerEventDispatcherBinding on FlutterErrorDet
         return summary;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            exception: namedArgs.containsKey('exception') ? namedArgs['exception'] : null,
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null,
-            library: namedArgs.containsKey('library') ? namedArgs['library'] : null,
-            silent: namedArgs.containsKey('silent') ? namedArgs['silent'] : null,
+            context:
+                namedArgs.containsKey('context') ? namedArgs['context'] : null,
+            exception: namedArgs.containsKey('exception')
+                ? namedArgs['exception']
+                : null,
+            informationCollector: namedArgs.containsKey('informationCollector')
+                ? namedArgs['informationCollector']
+                : null,
+            library:
+                namedArgs.containsKey('library') ? namedArgs['library'] : null,
+            silent:
+                namedArgs.containsKey('silent') ? namedArgs['silent'] : null,
             stack: namedArgs.containsKey('stack') ? namedArgs['stack'] : null,
-            stackFilter: namedArgs.containsKey('stackFilter') ? namedArgs['stackFilter'] : null);
+            stackFilter: namedArgs.containsKey('stackFilter')
+                ? namedArgs['stackFilter']
+                : null);
       case 'exceptionAsString':
         return ({positionalArgs, namedArgs, typeArgs}) => exceptionAsString();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/converter.g.dart b/lib/bindings/flutter/gestures/converter.g.dart
index d35bde8..79efb70 100644
--- a/lib/bindings/flutter/gestures/converter.g.dart
+++ b/lib/bindings/flutter/gestures/converter.g.dart
@@ -11,7 +11,7 @@ class PointerEventConverterAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             PointerEventConverter.expand(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/drag_details.g.dart b/lib/bindings/flutter/gestures/drag_details.g.dart
index f91df90..07decc7 100644
--- a/lib/bindings/flutter/gestures/drag_details.g.dart
+++ b/lib/bindings/flutter/gestures/drag_details.g.dart
@@ -10,10 +10,14 @@ class DragDownDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DragDownDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => DragDownDetails(
-            globalPosition: namedArgs.containsKey('globalPosition') ? namedArgs['globalPosition'] : Offset.zero,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null);
+            globalPosition: namedArgs.containsKey('globalPosition')
+                ? namedArgs['globalPosition']
+                : Offset.zero,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +31,7 @@ extension DragDownDetailsBinding on DragDownDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DragDownDetails');
+        return const HTType('DragDownDetails');
       case 'globalPosition':
         return globalPosition;
       case 'localPosition':
@@ -35,7 +39,7 @@ extension DragDownDetailsBinding on DragDownDetails {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,12 +52,18 @@ class DragStartDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DragStartDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => DragStartDetails(
-            sourceTimeStamp: namedArgs.containsKey('sourceTimeStamp') ? namedArgs['sourceTimeStamp'] : null,
-            globalPosition: namedArgs.containsKey('globalPosition') ? namedArgs['globalPosition'] : Offset.zero,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null,
+            sourceTimeStamp: namedArgs.containsKey('sourceTimeStamp')
+                ? namedArgs['sourceTimeStamp']
+                : null,
+            globalPosition: namedArgs.containsKey('globalPosition')
+                ? namedArgs['globalPosition']
+                : Offset.zero,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,7 +77,7 @@ extension DragStartDetailsBinding on DragStartDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DragStartDetails');
+        return const HTType('DragStartDetails');
       case 'sourceTimeStamp':
         return sourceTimeStamp;
       case 'globalPosition':
@@ -79,7 +89,7 @@ extension DragStartDetailsBinding on DragStartDetails {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -92,13 +102,21 @@ class DragUpdateDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DragUpdateDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => DragUpdateDetails(
-            sourceTimeStamp: namedArgs.containsKey('sourceTimeStamp') ? namedArgs['sourceTimeStamp'] : null,
-            delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : Offset.zero,
-            primaryDelta: namedArgs.containsKey('primaryDelta') ? namedArgs['primaryDelta'] : null,
+            sourceTimeStamp: namedArgs.containsKey('sourceTimeStamp')
+                ? namedArgs['sourceTimeStamp']
+                : null,
+            delta: namedArgs.containsKey('delta')
+                ? namedArgs['delta']
+                : Offset.zero,
+            primaryDelta: namedArgs.containsKey('primaryDelta')
+                ? namedArgs['primaryDelta']
+                : null,
             globalPosition: namedArgs['globalPosition'],
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null);
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -112,7 +130,7 @@ extension DragUpdateDetailsBinding on DragUpdateDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DragUpdateDetails');
+        return const HTType('DragUpdateDetails');
       case 'sourceTimeStamp':
         return sourceTimeStamp;
       case 'delta':
@@ -126,7 +144,7 @@ extension DragUpdateDetailsBinding on DragUpdateDetails {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -139,10 +157,14 @@ class DragEndDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DragEndDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => DragEndDetails(
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : Velocity.zero,
-            primaryVelocity: namedArgs.containsKey('primaryVelocity') ? namedArgs['primaryVelocity'] : null);
+            velocity: namedArgs.containsKey('velocity')
+                ? namedArgs['velocity']
+                : Velocity.zero,
+            primaryVelocity: namedArgs.containsKey('primaryVelocity')
+                ? namedArgs['primaryVelocity']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -156,7 +178,7 @@ extension DragEndDetailsBinding on DragEndDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DragEndDetails');
+        return const HTType('DragEndDetails');
       case 'velocity':
         return velocity;
       case 'primaryVelocity':
@@ -164,7 +186,7 @@ extension DragEndDetailsBinding on DragEndDetails {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/eager.g.dart b/lib/bindings/flutter/gestures/eager.g.dart
index 984ee10..cb15c02 100644
--- a/lib/bindings/flutter/gestures/eager.g.dart
+++ b/lib/bindings/flutter/gestures/eager.g.dart
@@ -10,9 +10,10 @@ class EagerGestureRecognizerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'EagerGestureRecognizer':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            EagerGestureRecognizer(kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+            EagerGestureRecognizer(
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +27,7 @@ extension EagerGestureRecognizerBinding on EagerGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EagerGestureRecognizer');
+        return const HTType('EagerGestureRecognizer');
       case 'debugOwner':
         return debugOwner;
       case 'debugDescription':
@@ -34,35 +35,54 @@ extension EagerGestureRecognizerBinding on EagerGestureRecognizer {
       case 'team':
         return team;
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -70,9 +90,10 @@ extension EagerGestureRecognizerBinding on EagerGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/events.g.dart b/lib/bindings/flutter/gestures/events.g.dart
index f4708c5..c1f130b 100644
--- a/lib/bindings/flutter/gestures/events.g.dart
+++ b/lib/bindings/flutter/gestures/events.g.dart
@@ -13,23 +13,47 @@ class PointerAddedEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerAddedEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerAddedEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distance:
+                namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -43,7 +67,7 @@ extension PointerAddedEventBinding on PointerAddedEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerAddedEvent');
+        return const HTType('PointerAddedEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -103,46 +127,83 @@ extension PointerAddedEventBinding on PointerAddedEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -155,21 +216,44 @@ class PointerRemovedEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerRemovedEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerRemovedEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            original: namedArgs.containsKey('original') ? namedArgs['original'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            original: namedArgs.containsKey('original')
+                ? namedArgs['original']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -183,7 +267,7 @@ extension PointerRemovedEventBinding on PointerRemovedEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerRemovedEvent');
+        return const HTType('PointerRemovedEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -243,46 +327,83 @@ extension PointerRemovedEventBinding on PointerRemovedEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -295,29 +416,62 @@ class PointerHoverEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerHoverEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerHoverEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : Offset.zero,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            delta: namedArgs.containsKey('delta')
+                ? namedArgs['delta']
+                : Offset.zero,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distance:
+                namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : false,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : false,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -331,7 +485,7 @@ extension PointerHoverEventBinding on PointerHoverEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerHoverEvent');
+        return const HTType('PointerHoverEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -391,46 +545,83 @@ extension PointerHoverEventBinding on PointerHoverEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -443,32 +634,66 @@ class PointerEnterEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerEnterEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerEnterEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : Offset.zero,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            delta: namedArgs.containsKey('delta')
+                ? namedArgs['delta']
+                : Offset.zero,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distance:
+                namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
             down: namedArgs.containsKey('down') ? namedArgs['down'] : false,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : false,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : false,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       case 'PointerEnterEvent.fromMouseEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => PointerEnterEvent.fromMouseEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PointerEnterEvent.fromMouseEvent(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -482,7 +707,7 @@ extension PointerEnterEventBinding on PointerEnterEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerEnterEvent');
+        return const HTType('PointerEnterEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -542,46 +767,83 @@ extension PointerEnterEventBinding on PointerEnterEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -594,32 +856,66 @@ class PointerExitEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerExitEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerExitEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : Offset.zero,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            delta: namedArgs.containsKey('delta')
+                ? namedArgs['delta']
+                : Offset.zero,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distance:
+                namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
             down: namedArgs.containsKey('down') ? namedArgs['down'] : false,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : false,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : false,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       case 'PointerExitEvent.fromMouseEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => PointerExitEvent.fromMouseEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PointerExitEvent.fromMouseEvent(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -633,7 +929,7 @@ extension PointerExitEventBinding on PointerExitEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerExitEvent');
+        return const HTType('PointerExitEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -693,46 +989,83 @@ extension PointerExitEventBinding on PointerExitEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -745,27 +1078,57 @@ class PointerDownEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerDownEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerDownEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : kPrimaryButton,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 1.0,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            buttons: namedArgs.containsKey('buttons')
+                ? namedArgs['buttons']
+                : kPrimaryButton,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressure:
+                namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 1.0,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -779,7 +1142,7 @@ extension PointerDownEventBinding on PointerDownEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerDownEvent');
+        return const HTType('PointerDownEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -839,46 +1202,83 @@ extension PointerDownEventBinding on PointerDownEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -891,30 +1291,66 @@ class PointerMoveEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerMoveEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerMoveEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : Offset.zero,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : kPrimaryButton,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 1.0,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            delta: namedArgs.containsKey('delta')
+                ? namedArgs['delta']
+                : Offset.zero,
+            buttons: namedArgs.containsKey('buttons')
+                ? namedArgs['buttons']
+                : kPrimaryButton,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressure:
+                namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 1.0,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
-            platformData: namedArgs.containsKey('platformData') ? namedArgs['platformData'] : 0,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : false,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            platformData: namedArgs.containsKey('platformData')
+                ? namedArgs['platformData']
+                : 0,
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : false,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -928,7 +1364,7 @@ extension PointerMoveEventBinding on PointerMoveEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerMoveEvent');
+        return const HTType('PointerMoveEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -988,46 +1424,83 @@ extension PointerMoveEventBinding on PointerMoveEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1040,28 +1513,58 @@ class PointerUpEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerUpEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerUpEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 0.0,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressure:
+                namedArgs.containsKey('pressure') ? namedArgs['pressure'] : 0.0,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distance:
+                namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1075,7 +1578,7 @@ extension PointerUpEventBinding on PointerUpEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerUpEvent');
+        return const HTType('PointerUpEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -1135,47 +1638,86 @@ extension PointerUpEventBinding on PointerUpEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1188,14 +1730,24 @@ class PointerScrollEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerScrollEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerScrollEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.mouse,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.mouse,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            scrollDelta: namedArgs.containsKey('scrollDelta') ? namedArgs['scrollDelta'] : Offset.zero,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            scrollDelta: namedArgs.containsKey('scrollDelta')
+                ? namedArgs['scrollDelta']
+                : Offset.zero,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1209,7 +1761,7 @@ extension PointerScrollEventBinding on PointerScrollEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerScrollEvent');
+        return const HTType('PointerScrollEvent');
       case 'scrollDelta':
         return scrollDelta;
       case 'embedderId':
@@ -1271,46 +1823,83 @@ extension PointerScrollEventBinding on PointerScrollEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1323,27 +1912,56 @@ class PointerCancelEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PointerCancelEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerCancelEvent(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : Duration.zero,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : PointerDeviceKind.touch,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : Duration.zero,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : 0,
+            kind: namedArgs.containsKey('kind')
+                ? namedArgs['kind']
+                : PointerDeviceKind.touch,
             device: namedArgs.containsKey('device') ? namedArgs['device'] : 0,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : Offset.zero,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : false,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : 1.0,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : 1.0,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : 0.0,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : Offset.zero,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : 0,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : false,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : 1.0,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : 1.0,
+            distance:
+                namedArgs.containsKey('distance') ? namedArgs['distance'] : 0.0,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : 0.0,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 0.0,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : 0.0,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : 0.0,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : 0.0,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : 0.0,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : 0.0,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : 0.0,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : 0.0,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : 0.0,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : 0.0,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : 0.0,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : 0.0,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : 0);
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1357,7 +1975,7 @@ extension PointerCancelEventBinding on PointerCancelEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerCancelEvent');
+        return const HTType('PointerCancelEvent');
       case 'embedderId':
         return embedderId;
       case 'timeStamp':
@@ -1417,46 +2035,83 @@ extension PointerCancelEventBinding on PointerCancelEvent {
       case 'distanceMin':
         return distanceMin;
       case 'transformed':
-        return ({positionalArgs, namedArgs, typeArgs}) => transformed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transformed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringFull':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringFull();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            timeStamp: namedArgs.containsKey('timeStamp') ? namedArgs['timeStamp'] : null,
-            pointer: namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
+            timeStamp: namedArgs.containsKey('timeStamp')
+                ? namedArgs['timeStamp']
+                : null,
+            pointer:
+                namedArgs.containsKey('pointer') ? namedArgs['pointer'] : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            device: namedArgs.containsKey('device') ? namedArgs['device'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            device:
+                namedArgs.containsKey('device') ? namedArgs['device'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             delta: namedArgs.containsKey('delta') ? namedArgs['delta'] : null,
-            buttons: namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            pressure: namedArgs.containsKey('pressure') ? namedArgs['pressure'] : null,
-            pressureMin: namedArgs.containsKey('pressureMin') ? namedArgs['pressureMin'] : null,
-            pressureMax: namedArgs.containsKey('pressureMax') ? namedArgs['pressureMax'] : null,
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : null,
-            distanceMax: namedArgs.containsKey('distanceMax') ? namedArgs['distanceMax'] : null,
+            buttons:
+                namedArgs.containsKey('buttons') ? namedArgs['buttons'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            pressure: namedArgs.containsKey('pressure')
+                ? namedArgs['pressure']
+                : null,
+            pressureMin: namedArgs.containsKey('pressureMin')
+                ? namedArgs['pressureMin']
+                : null,
+            pressureMax: namedArgs.containsKey('pressureMax')
+                ? namedArgs['pressureMax']
+                : null,
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : null,
+            distanceMax: namedArgs.containsKey('distanceMax')
+                ? namedArgs['distanceMax']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            radiusMajor: namedArgs.containsKey('radiusMajor') ? namedArgs['radiusMajor'] : null,
-            radiusMinor: namedArgs.containsKey('radiusMinor') ? namedArgs['radiusMinor'] : null,
-            radiusMin: namedArgs.containsKey('radiusMin') ? namedArgs['radiusMin'] : null,
-            radiusMax: namedArgs.containsKey('radiusMax') ? namedArgs['radiusMax'] : null,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : null,
+            radiusMajor: namedArgs.containsKey('radiusMajor')
+                ? namedArgs['radiusMajor']
+                : null,
+            radiusMinor: namedArgs.containsKey('radiusMinor')
+                ? namedArgs['radiusMinor']
+                : null,
+            radiusMin: namedArgs.containsKey('radiusMin')
+                ? namedArgs['radiusMin']
+                : null,
+            radiusMax: namedArgs.containsKey('radiusMax')
+                ? namedArgs['radiusMax']
+                : null,
+            orientation: namedArgs.containsKey('orientation')
+                ? namedArgs['orientation']
+                : null,
             tilt: namedArgs.containsKey('tilt') ? namedArgs['tilt'] : null,
-            synthesized: namedArgs.containsKey('synthesized') ? namedArgs['synthesized'] : null,
-            embedderId: namedArgs.containsKey('embedderId') ? namedArgs['embedderId'] : null);
+            synthesized: namedArgs.containsKey('synthesized')
+                ? namedArgs['synthesized']
+                : null,
+            embedderId: namedArgs.containsKey('embedderId')
+                ? namedArgs['embedderId']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/force_press.g.dart b/lib/bindings/flutter/gestures/force_press.g.dart
index 9640798..a6626fa 100644
--- a/lib/bindings/flutter/gestures/force_press.g.dart
+++ b/lib/bindings/flutter/gestures/force_press.g.dart
@@ -11,10 +11,12 @@ class ForcePressDetailsAutoBinding extends HTExternalClass {
       case 'ForcePressDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => ForcePressDetails(
             globalPosition: namedArgs['globalPosition'],
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null,
             pressure: namedArgs['pressure']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +30,7 @@ extension ForcePressDetailsBinding on ForcePressDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ForcePressDetails');
+        return const HTType('ForcePressDetails');
       case 'globalPosition':
         return globalPosition;
       case 'localPosition':
@@ -36,26 +38,36 @@ extension ForcePressDetailsBinding on ForcePressDetails {
       case 'pressure':
         return pressure;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class ForcePressGestureRecognizerAutoBinding extends HTExternalClass {
-  ForcePressGestureRecognizerAutoBinding() : super('ForcePressGestureRecognizer');
+  ForcePressGestureRecognizerAutoBinding()
+      : super('ForcePressGestureRecognizer');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ForcePressGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => ForcePressGestureRecognizer(
-            startPressure: namedArgs.containsKey('startPressure') ? namedArgs['startPressure'] : 0.4,
-            peakPressure: namedArgs.containsKey('peakPressure') ? namedArgs['peakPressure'] : 0.85,
-            interpolation: namedArgs.containsKey('interpolation') ? namedArgs['interpolation'] : _inverseLerp,
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ForcePressGestureRecognizer(
+                startPressure: namedArgs.containsKey('startPressure')
+                    ? namedArgs['startPressure']
+                    : 0.4,
+                peakPressure: namedArgs.containsKey('peakPressure')
+                    ? namedArgs['peakPressure']
+                    : 0.85,
+                interpolation: namedArgs.containsKey('interpolation')
+                    ? namedArgs['interpolation']
+                    : _inverseLerp,
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,8 +83,10 @@ class ForcePressGestureRecognizerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureForceInterpolation': (HTFunction function) => (pressureMin, pressureMax, pressure) =>
-          function.call(positionalArgs: [pressureMin, pressureMax, pressure], namedArgs: const {}) as double,
+      'GestureForceInterpolation': (HTFunction function) =>
+          (pressureMin, pressureMax, pressure) => function.call(
+              positionalArgs: [pressureMin, pressureMax, pressure],
+              namedArgs: const {}) as double,
     };
   }
 
@@ -88,7 +102,7 @@ extension ForcePressGestureRecognizerBinding on ForcePressGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ForcePressGestureRecognizer');
+        return const HTType('ForcePressGestureRecognizer');
       case 'onStart':
         return onStart;
       case 'onUpdate':
@@ -110,35 +124,54 @@ extension ForcePressGestureRecognizerBinding on ForcePressGestureRecognizer {
       case 'team':
         return team;
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -146,9 +179,10 @@ extension ForcePressGestureRecognizerBinding on ForcePressGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -167,7 +201,7 @@ extension ForcePressGestureRecognizerBinding on ForcePressGestureRecognizer {
         onEnd = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/hit_test.g.dart b/lib/bindings/flutter/gestures/hit_test.g.dart
index c6d339a..f844868 100644
--- a/lib/bindings/flutter/gestures/hit_test.g.dart
+++ b/lib/bindings/flutter/gestures/hit_test.g.dart
@@ -8,9 +8,10 @@ class HitTestEntryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'HitTestEntry':
-        return ({positionalArgs, namedArgs, typeArgs}) => HitTestEntry(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HitTestEntry(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +25,7 @@ extension HitTestEntryBinding on HitTestEntry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HitTestEntry');
+        return const HTType('HitTestEntry');
       case 'target':
         return target;
       case 'transform':
@@ -32,7 +33,7 @@ extension HitTestEntryBinding on HitTestEntry {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,9 +47,10 @@ class HitTestResultAutoBinding extends HTExternalClass {
       case 'HitTestResult':
         return ({positionalArgs, namedArgs, typeArgs}) => HitTestResult();
       case 'HitTestResult.wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => HitTestResult.wrap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HitTestResult.wrap(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,15 +64,16 @@ extension HitTestResultBinding on HitTestResult {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HitTestResult');
+        return const HTType('HitTestResult');
       case 'path':
         return path;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/long_press.g.dart b/lib/bindings/flutter/gestures/long_press.g.dart
index dc6af3e..cc04929 100644
--- a/lib/bindings/flutter/gestures/long_press.g.dart
+++ b/lib/bindings/flutter/gestures/long_press.g.dart
@@ -10,10 +10,14 @@ class LongPressStartDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'LongPressStartDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => LongPressStartDetails(
-            globalPosition: namedArgs.containsKey('globalPosition') ? namedArgs['globalPosition'] : Offset.zero,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null);
+            globalPosition: namedArgs.containsKey('globalPosition')
+                ? namedArgs['globalPosition']
+                : Offset.zero,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +31,13 @@ extension LongPressStartDetailsBinding on LongPressStartDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LongPressStartDetails');
+        return const HTType('LongPressStartDetails');
       case 'globalPosition':
         return globalPosition;
       case 'localPosition':
         return localPosition;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,14 +49,23 @@ class LongPressMoveUpdateDetailsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LongPressMoveUpdateDetails':
-        return ({positionalArgs, namedArgs, typeArgs}) => LongPressMoveUpdateDetails(
-            globalPosition: namedArgs.containsKey('globalPosition') ? namedArgs['globalPosition'] : Offset.zero,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null,
-            offsetFromOrigin: namedArgs.containsKey('offsetFromOrigin') ? namedArgs['offsetFromOrigin'] : Offset.zero,
-            localOffsetFromOrigin:
-                namedArgs.containsKey('localOffsetFromOrigin') ? namedArgs['localOffsetFromOrigin'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LongPressMoveUpdateDetails(
+                globalPosition: namedArgs.containsKey('globalPosition')
+                    ? namedArgs['globalPosition']
+                    : Offset.zero,
+                localPosition: namedArgs.containsKey('localPosition')
+                    ? namedArgs['localPosition']
+                    : null,
+                offsetFromOrigin: namedArgs.containsKey('offsetFromOrigin')
+                    ? namedArgs['offsetFromOrigin']
+                    : Offset.zero,
+                localOffsetFromOrigin:
+                    namedArgs.containsKey('localOffsetFromOrigin')
+                        ? namedArgs['localOffsetFromOrigin']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +79,7 @@ extension LongPressMoveUpdateDetailsBinding on LongPressMoveUpdateDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LongPressMoveUpdateDetails');
+        return const HTType('LongPressMoveUpdateDetails');
       case 'globalPosition':
         return globalPosition;
       case 'localPosition':
@@ -76,7 +89,7 @@ extension LongPressMoveUpdateDetailsBinding on LongPressMoveUpdateDetails {
       case 'localOffsetFromOrigin':
         return localOffsetFromOrigin;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -89,11 +102,17 @@ class LongPressEndDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'LongPressEndDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => LongPressEndDetails(
-            globalPosition: namedArgs.containsKey('globalPosition') ? namedArgs['globalPosition'] : Offset.zero,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : Velocity.zero);
+            globalPosition: namedArgs.containsKey('globalPosition')
+                ? namedArgs['globalPosition']
+                : Offset.zero,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null,
+            velocity: namedArgs.containsKey('velocity')
+                ? namedArgs['velocity']
+                : Velocity.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -107,7 +126,7 @@ extension LongPressEndDetailsBinding on LongPressEndDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LongPressEndDetails');
+        return const HTType('LongPressEndDetails');
       case 'globalPosition':
         return globalPosition;
       case 'localPosition':
@@ -115,7 +134,7 @@ extension LongPressEndDetailsBinding on LongPressEndDetails {
       case 'velocity':
         return velocity;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -127,14 +146,21 @@ class LongPressGestureRecognizerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LongPressGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => LongPressGestureRecognizer(
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
-            postAcceptSlopTolerance:
-                namedArgs.containsKey('postAcceptSlopTolerance') ? namedArgs['postAcceptSlopTolerance'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LongPressGestureRecognizer(
+                duration: namedArgs.containsKey('duration')
+                    ? namedArgs['duration']
+                    : null,
+                postAcceptSlopTolerance:
+                    namedArgs.containsKey('postAcceptSlopTolerance')
+                        ? namedArgs['postAcceptSlopTolerance']
+                        : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -153,7 +179,7 @@ extension LongPressGestureRecognizerBinding on LongPressGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LongPressGestureRecognizer');
+        return const HTType('LongPressGestureRecognizer');
       case 'onLongPress':
         return onLongPress;
       case 'onLongPressStart':
@@ -203,43 +229,65 @@ extension LongPressGestureRecognizerBinding on LongPressGestureRecognizer {
       case 'team':
         return team;
       case 'isPointerAllowed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isPointerAllowed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isPointerAllowed(positionalArgs[0]);
       case 'didExceedDeadline':
         return ({positionalArgs, namedArgs, typeArgs}) => didExceedDeadline();
       case 'handlePrimaryPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handlePrimaryPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handlePrimaryPointer(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            addPointer(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -247,9 +295,10 @@ extension LongPressGestureRecognizerBinding on LongPressGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -310,7 +359,7 @@ extension LongPressGestureRecognizerBinding on LongPressGestureRecognizer {
         initialPosition = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/lsq_solver.g.dart b/lib/bindings/flutter/gestures/lsq_solver.g.dart
index 039fae0..61503a7 100644
--- a/lib/bindings/flutter/gestures/lsq_solver.g.dart
+++ b/lib/bindings/flutter/gestures/lsq_solver.g.dart
@@ -8,9 +8,10 @@ class PolynomialFitAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PolynomialFit':
-        return ({positionalArgs, namedArgs, typeArgs}) => PolynomialFit(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PolynomialFit(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,13 +30,13 @@ extension PolynomialFitBinding on PolynomialFit {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PolynomialFit');
+        return const HTType('PolynomialFit');
       case 'coefficients':
         return coefficients;
       case 'confidence':
         return confidence;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,7 +46,7 @@ extension PolynomialFitBinding on PolynomialFit {
         confidence = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -57,10 +58,12 @@ class LeastSquaresSolverAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LeastSquaresSolver':
-        return ({positionalArgs, namedArgs, typeArgs}) => LeastSquaresSolver(List<double>.from(positionalArgs[0]),
-            List<double>.from(positionalArgs[1]), List<double>.from(positionalArgs[2]));
+        return ({positionalArgs, namedArgs, typeArgs}) => LeastSquaresSolver(
+            List<double>.from(positionalArgs[0]),
+            List<double>.from(positionalArgs[1]),
+            List<double>.from(positionalArgs[2]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -74,7 +77,7 @@ extension LeastSquaresSolverBinding on LeastSquaresSolver {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LeastSquaresSolver');
+        return const HTType('LeastSquaresSolver');
       case 'x':
         return x;
       case 'y':
@@ -82,9 +85,10 @@ extension LeastSquaresSolverBinding on LeastSquaresSolver {
       case 'w':
         return w;
       case 'solve':
-        return ({positionalArgs, namedArgs, typeArgs}) => solve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            solve(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/monodrag.g.dart b/lib/bindings/flutter/gestures/monodrag.g.dart
index c4d8fbe..5976d2e 100644
--- a/lib/bindings/flutter/gestures/monodrag.g.dart
+++ b/lib/bindings/flutter/gestures/monodrag.g.dart
@@ -3,17 +3,21 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/foundation.dart';
 
 class VerticalDragGestureRecognizerAutoBinding extends HTExternalClass {
-  VerticalDragGestureRecognizerAutoBinding() : super('VerticalDragGestureRecognizer');
+  VerticalDragGestureRecognizerAutoBinding()
+      : super('VerticalDragGestureRecognizer');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'VerticalDragGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => VerticalDragGestureRecognizer(
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            VerticalDragGestureRecognizer(
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,11 +32,12 @@ class VerticalDragGestureRecognizerAutoBinding extends HTExternalClass {
   }
 }
 
-extension VerticalDragGestureRecognizerBinding on VerticalDragGestureRecognizer {
+extension VerticalDragGestureRecognizerBinding
+    on VerticalDragGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VerticalDragGestureRecognizer');
+        return const HTType('VerticalDragGestureRecognizer');
       case 'dragStartBehavior':
         return dragStartBehavior;
       case 'onDown':
@@ -60,39 +65,60 @@ extension VerticalDragGestureRecognizerBinding on VerticalDragGestureRecognizer
       case 'team':
         return team;
       case 'isFlingGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFlingGesture(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFlingGesture(positionalArgs[0], positionalArgs[1]);
       case 'isPointerAllowed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isPointerAllowed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isPointerAllowed(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            addPointer(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -100,9 +126,10 @@ extension VerticalDragGestureRecognizerBinding on VerticalDragGestureRecognizer
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -139,23 +166,27 @@ extension VerticalDragGestureRecognizerBinding on VerticalDragGestureRecognizer
         velocityTrackerBuilder = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class HorizontalDragGestureRecognizerAutoBinding extends HTExternalClass {
-  HorizontalDragGestureRecognizerAutoBinding() : super('HorizontalDragGestureRecognizer');
+  HorizontalDragGestureRecognizerAutoBinding()
+      : super('HorizontalDragGestureRecognizer');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'HorizontalDragGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => HorizontalDragGestureRecognizer(
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HorizontalDragGestureRecognizer(
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -170,11 +201,12 @@ class HorizontalDragGestureRecognizerAutoBinding extends HTExternalClass {
   }
 }
 
-extension HorizontalDragGestureRecognizerBinding on HorizontalDragGestureRecognizer {
+extension HorizontalDragGestureRecognizerBinding
+    on HorizontalDragGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HorizontalDragGestureRecognizer');
+        return const HTType('HorizontalDragGestureRecognizer');
       case 'dragStartBehavior':
         return dragStartBehavior;
       case 'onDown':
@@ -202,39 +234,60 @@ extension HorizontalDragGestureRecognizerBinding on HorizontalDragGestureRecogni
       case 'team':
         return team;
       case 'isFlingGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFlingGesture(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFlingGesture(positionalArgs[0], positionalArgs[1]);
       case 'isPointerAllowed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isPointerAllowed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isPointerAllowed(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            addPointer(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -242,9 +295,10 @@ extension HorizontalDragGestureRecognizerBinding on HorizontalDragGestureRecogni
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -281,7 +335,7 @@ extension HorizontalDragGestureRecognizerBinding on HorizontalDragGestureRecogni
         velocityTrackerBuilder = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -293,10 +347,12 @@ class PanGestureRecognizerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PanGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            PanGestureRecognizer(debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => PanGestureRecognizer(
+            debugOwner: namedArgs.containsKey('debugOwner')
+                ? namedArgs['debugOwner']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -315,7 +371,7 @@ extension PanGestureRecognizerBinding on PanGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PanGestureRecognizer');
+        return const HTType('PanGestureRecognizer');
       case 'dragStartBehavior':
         return dragStartBehavior;
       case 'onDown':
@@ -343,39 +399,60 @@ extension PanGestureRecognizerBinding on PanGestureRecognizer {
       case 'team':
         return team;
       case 'isFlingGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFlingGesture(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFlingGesture(positionalArgs[0], positionalArgs[1]);
       case 'isPointerAllowed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isPointerAllowed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isPointerAllowed(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            addPointer(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -383,9 +460,10 @@ extension PanGestureRecognizerBinding on PanGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -422,7 +500,7 @@ extension PanGestureRecognizerBinding on PanGestureRecognizer {
         velocityTrackerBuilder = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/multidrag.g.dart b/lib/bindings/flutter/gestures/multidrag.g.dart
index 7640c82..d68164b 100644
--- a/lib/bindings/flutter/gestures/multidrag.g.dart
+++ b/lib/bindings/flutter/gestures/multidrag.g.dart
@@ -3,17 +3,21 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/foundation.dart';
 
 class ImmediateMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
-  ImmediateMultiDragGestureRecognizerAutoBinding() : super('ImmediateMultiDragGestureRecognizer');
+  ImmediateMultiDragGestureRecognizerAutoBinding()
+      : super('ImmediateMultiDragGestureRecognizer');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ImmediateMultiDragGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => ImmediateMultiDragGestureRecognizer(
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ImmediateMultiDragGestureRecognizer(
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,11 +32,12 @@ class ImmediateMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
   }
 }
 
-extension ImmediateMultiDragGestureRecognizerBinding on ImmediateMultiDragGestureRecognizer {
+extension ImmediateMultiDragGestureRecognizerBinding
+    on ImmediateMultiDragGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImmediateMultiDragGestureRecognizer');
+        return const HTType('ImmediateMultiDragGestureRecognizer');
       case 'onStart':
         return onStart;
       case 'debugOwner':
@@ -40,31 +45,48 @@ extension ImmediateMultiDragGestureRecognizerBinding on ImmediateMultiDragGestur
       case 'debugDescription':
         return debugDescription;
       case 'createNewPointerState':
-        return ({positionalArgs, namedArgs, typeArgs}) => createNewPointerState(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createNewPointerState(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -72,9 +94,10 @@ extension ImmediateMultiDragGestureRecognizerBinding on ImmediateMultiDragGestur
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -84,23 +107,27 @@ extension ImmediateMultiDragGestureRecognizerBinding on ImmediateMultiDragGestur
         onStart = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class HorizontalMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
-  HorizontalMultiDragGestureRecognizerAutoBinding() : super('HorizontalMultiDragGestureRecognizer');
+  HorizontalMultiDragGestureRecognizerAutoBinding()
+      : super('HorizontalMultiDragGestureRecognizer');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'HorizontalMultiDragGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => HorizontalMultiDragGestureRecognizer(
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HorizontalMultiDragGestureRecognizer(
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -115,11 +142,12 @@ class HorizontalMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
   }
 }
 
-extension HorizontalMultiDragGestureRecognizerBinding on HorizontalMultiDragGestureRecognizer {
+extension HorizontalMultiDragGestureRecognizerBinding
+    on HorizontalMultiDragGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HorizontalMultiDragGestureRecognizer');
+        return const HTType('HorizontalMultiDragGestureRecognizer');
       case 'onStart':
         return onStart;
       case 'debugOwner':
@@ -127,31 +155,48 @@ extension HorizontalMultiDragGestureRecognizerBinding on HorizontalMultiDragGest
       case 'debugDescription':
         return debugDescription;
       case 'createNewPointerState':
-        return ({positionalArgs, namedArgs, typeArgs}) => createNewPointerState(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createNewPointerState(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -159,9 +204,10 @@ extension HorizontalMultiDragGestureRecognizerBinding on HorizontalMultiDragGest
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -171,23 +217,27 @@ extension HorizontalMultiDragGestureRecognizerBinding on HorizontalMultiDragGest
         onStart = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class VerticalMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
-  VerticalMultiDragGestureRecognizerAutoBinding() : super('VerticalMultiDragGestureRecognizer');
+  VerticalMultiDragGestureRecognizerAutoBinding()
+      : super('VerticalMultiDragGestureRecognizer');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'VerticalMultiDragGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => VerticalMultiDragGestureRecognizer(
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            VerticalMultiDragGestureRecognizer(
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -202,11 +252,12 @@ class VerticalMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
   }
 }
 
-extension VerticalMultiDragGestureRecognizerBinding on VerticalMultiDragGestureRecognizer {
+extension VerticalMultiDragGestureRecognizerBinding
+    on VerticalMultiDragGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VerticalMultiDragGestureRecognizer');
+        return const HTType('VerticalMultiDragGestureRecognizer');
       case 'onStart':
         return onStart;
       case 'debugOwner':
@@ -214,31 +265,48 @@ extension VerticalMultiDragGestureRecognizerBinding on VerticalMultiDragGestureR
       case 'debugDescription':
         return debugDescription;
       case 'createNewPointerState':
-        return ({positionalArgs, namedArgs, typeArgs}) => createNewPointerState(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createNewPointerState(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -246,9 +314,10 @@ extension VerticalMultiDragGestureRecognizerBinding on VerticalMultiDragGestureR
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -258,24 +327,30 @@ extension VerticalMultiDragGestureRecognizerBinding on VerticalMultiDragGestureR
         onStart = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DelayedMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
-  DelayedMultiDragGestureRecognizerAutoBinding() : super('DelayedMultiDragGestureRecognizer');
+  DelayedMultiDragGestureRecognizerAutoBinding()
+      : super('DelayedMultiDragGestureRecognizer');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DelayedMultiDragGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => DelayedMultiDragGestureRecognizer(
-            delay: namedArgs.containsKey('delay') ? namedArgs['delay'] : kLongPressTimeout,
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DelayedMultiDragGestureRecognizer(
+                delay: namedArgs.containsKey('delay')
+                    ? namedArgs['delay']
+                    : kLongPressTimeout,
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -290,11 +365,12 @@ class DelayedMultiDragGestureRecognizerAutoBinding extends HTExternalClass {
   }
 }
 
-extension DelayedMultiDragGestureRecognizerBinding on DelayedMultiDragGestureRecognizer {
+extension DelayedMultiDragGestureRecognizerBinding
+    on DelayedMultiDragGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DelayedMultiDragGestureRecognizer');
+        return const HTType('DelayedMultiDragGestureRecognizer');
       case 'delay':
         return delay;
       case 'onStart':
@@ -304,31 +380,48 @@ extension DelayedMultiDragGestureRecognizerBinding on DelayedMultiDragGestureRec
       case 'debugDescription':
         return debugDescription;
       case 'createNewPointerState':
-        return ({positionalArgs, namedArgs, typeArgs}) => createNewPointerState(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createNewPointerState(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -336,9 +429,10 @@ extension DelayedMultiDragGestureRecognizerBinding on DelayedMultiDragGestureRec
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -348,7 +442,7 @@ extension DelayedMultiDragGestureRecognizerBinding on DelayedMultiDragGestureRec
         onStart = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/multitap.g.dart b/lib/bindings/flutter/gestures/multitap.g.dart
index d93f186..25130eb 100644
--- a/lib/bindings/flutter/gestures/multitap.g.dart
+++ b/lib/bindings/flutter/gestures/multitap.g.dart
@@ -9,11 +9,14 @@ class DoubleTapGestureRecognizerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DoubleTapGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => DoubleTapGestureRecognizer(
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DoubleTapGestureRecognizer(
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +35,7 @@ extension DoubleTapGestureRecognizerBinding on DoubleTapGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DoubleTapGestureRecognizer');
+        return const HTType('DoubleTapGestureRecognizer');
       case 'onDoubleTapDown':
         return onDoubleTapDown;
       case 'onDoubleTap':
@@ -44,31 +47,48 @@ extension DoubleTapGestureRecognizerBinding on DoubleTapGestureRecognizer {
       case 'debugDescription':
         return debugDescription;
       case 'isPointerAllowed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isPointerAllowed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isPointerAllowed(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -76,9 +96,10 @@ extension DoubleTapGestureRecognizerBinding on DoubleTapGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -94,7 +115,7 @@ extension DoubleTapGestureRecognizerBinding on DoubleTapGestureRecognizer {
         onDoubleTapCancel = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -106,12 +127,18 @@ class MultiTapGestureRecognizerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MultiTapGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => MultiTapGestureRecognizer(
-            longTapDelay: namedArgs.containsKey('longTapDelay') ? namedArgs['longTapDelay'] : Duration.zero,
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MultiTapGestureRecognizer(
+                longTapDelay:
+                    namedArgs.containsKey('longTapDelay')
+                        ? namedArgs['longTapDelay']
+                        : Duration.zero,
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -130,7 +157,7 @@ extension MultiTapGestureRecognizerBinding on MultiTapGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MultiTapGestureRecognizer');
+        return const HTType('MultiTapGestureRecognizer');
       case 'onTapDown':
         return onTapDown;
       case 'onTapUp':
@@ -148,29 +175,45 @@ extension MultiTapGestureRecognizerBinding on MultiTapGestureRecognizer {
       case 'debugDescription':
         return debugDescription;
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -178,9 +221,10 @@ extension MultiTapGestureRecognizerBinding on MultiTapGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -205,7 +249,7 @@ extension MultiTapGestureRecognizerBinding on MultiTapGestureRecognizer {
         onLongTapDown = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/pointer_router.g.dart b/lib/bindings/flutter/gestures/pointer_router.g.dart
index 6bde7da..c982805 100644
--- a/lib/bindings/flutter/gestures/pointer_router.g.dart
+++ b/lib/bindings/flutter/gestures/pointer_router.g.dart
@@ -10,7 +10,7 @@ class PointerRouterAutoBinding extends HTExternalClass {
       case 'PointerRouter':
         return ({positionalArgs, namedArgs, typeArgs}) => PointerRouter();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,7 +21,8 @@ class PointerRouterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PointerRoute': (HTFunction function) => (event) => function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerRoute': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
     };
   }
 }
@@ -30,23 +31,29 @@ extension PointerRouterBinding on PointerRouter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerRouter');
+        return const HTType('PointerRouter');
       case 'debugGlobalRouteCount':
         return debugGlobalRouteCount;
       case 'addRoute':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addRoute(positionalArgs[0], positionalArgs[1], positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => addRoute(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'removeRoute':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRoute(positionalArgs[0], positionalArgs[1]);
-      case 'addGlobalRoute':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            addGlobalRoute(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+            removeRoute(positionalArgs[0], positionalArgs[1]);
+      case 'addGlobalRoute':
+        return ({positionalArgs, namedArgs, typeArgs}) => addGlobalRoute(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'removeGlobalRoute':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeGlobalRoute(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeGlobalRoute(positionalArgs[0]);
       case 'route':
-        return ({positionalArgs, namedArgs, typeArgs}) => route(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            route(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/pointer_signal_resolver.g.dart b/lib/bindings/flutter/gestures/pointer_signal_resolver.g.dart
index 51bc014..1c83045 100644
--- a/lib/bindings/flutter/gestures/pointer_signal_resolver.g.dart
+++ b/lib/bindings/flutter/gestures/pointer_signal_resolver.g.dart
@@ -8,9 +8,10 @@ class PointerSignalResolverAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PointerSignalResolver':
-        return ({positionalArgs, namedArgs, typeArgs}) => PointerSignalResolver();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PointerSignalResolver();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,8 +22,8 @@ class PointerSignalResolverAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PointerSignalResolvedCallback': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerSignalResolvedCallback': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
     };
   }
 }
@@ -31,13 +32,15 @@ extension PointerSignalResolverBinding on PointerSignalResolver {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerSignalResolver');
+        return const HTType('PointerSignalResolver');
       case 'register':
-        return ({positionalArgs, namedArgs, typeArgs}) => register(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            register(positionalArgs[0], positionalArgs[1]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/recognizer.g.dart b/lib/bindings/flutter/gestures/recognizer.g.dart
index 542f3dc..8351d27 100644
--- a/lib/bindings/flutter/gestures/recognizer.g.dart
+++ b/lib/bindings/flutter/gestures/recognizer.g.dart
@@ -14,7 +14,7 @@ class DragStartBehaviorAutoBinding extends HTExternalClass {
       case 'DragStartBehavior.start':
         return DragStartBehavior.start;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class DragStartBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DragStartBehavior');
+        return const HTType('DragStartBehavior');
       case 'index':
         return (instance as DragStartBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DragStartBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DragStartBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,7 +49,7 @@ class GestureRecognizerStateAutoBinding extends HTExternalClass {
       case 'GestureRecognizerState.defunct':
         return GestureRecognizerState.defunct;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -56,13 +57,14 @@ class GestureRecognizerStateAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GestureRecognizerState');
+        return const HTType('GestureRecognizerState');
       case 'index':
         return (instance as GestureRecognizerState).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as GestureRecognizerState).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as GestureRecognizerState).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -77,13 +79,15 @@ class OffsetPairAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             OffsetPair(local: namedArgs['local'], global: namedArgs['global']);
       case 'OffsetPair.fromEventPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => OffsetPair.fromEventPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OffsetPair.fromEventPosition(positionalArgs[0]);
       case 'OffsetPair.fromEventDelta':
-        return ({positionalArgs, namedArgs, typeArgs}) => OffsetPair.fromEventDelta(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OffsetPair.fromEventDelta(positionalArgs[0]);
       case 'OffsetPair.zero':
         return OffsetPair.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -97,7 +101,7 @@ extension OffsetPairBinding on OffsetPair {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OffsetPair');
+        return const HTType('OffsetPair');
       case 'local':
         return local;
       case 'global':
@@ -105,7 +109,7 @@ extension OffsetPairBinding on OffsetPair {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/resampler.g.dart b/lib/bindings/flutter/gestures/resampler.g.dart
index 5e71c71..8b8f8e9 100644
--- a/lib/bindings/flutter/gestures/resampler.g.dart
+++ b/lib/bindings/flutter/gestures/resampler.g.dart
@@ -8,9 +8,10 @@ class PointerEventResamplerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PointerEventResampler':
-        return ({positionalArgs, namedArgs, typeArgs}) => PointerEventResampler();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PointerEventResampler();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,8 +22,8 @@ class PointerEventResamplerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'HandleEventCallback': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
+      'HandleEventCallback': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
     };
   }
 }
@@ -31,7 +32,7 @@ extension PointerEventResamplerBinding on PointerEventResampler {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PointerEventResampler');
+        return const HTType('PointerEventResampler');
       case 'hasPendingEvents':
         return hasPendingEvents;
       case 'isTracked':
@@ -39,14 +40,16 @@ extension PointerEventResamplerBinding on PointerEventResampler {
       case 'isDown':
         return isDown;
       case 'addEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => addEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addEvent(positionalArgs[0]);
       case 'sample':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             sample(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'stop':
-        return ({positionalArgs, namedArgs, typeArgs}) => stop(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            stop(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/scale.g.dart b/lib/bindings/flutter/gestures/scale.g.dart
index 5123b66..5f27718 100644
--- a/lib/bindings/flutter/gestures/scale.g.dart
+++ b/lib/bindings/flutter/gestures/scale.g.dart
@@ -10,11 +10,17 @@ class ScaleStartDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ScaleStartDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => ScaleStartDetails(
-            focalPoint: namedArgs.containsKey('focalPoint') ? namedArgs['focalPoint'] : Offset.zero,
-            localFocalPoint: namedArgs.containsKey('localFocalPoint') ? namedArgs['localFocalPoint'] : null,
-            pointerCount: namedArgs.containsKey('pointerCount') ? namedArgs['pointerCount'] : 0);
+            focalPoint: namedArgs.containsKey('focalPoint')
+                ? namedArgs['focalPoint']
+                : Offset.zero,
+            localFocalPoint: namedArgs.containsKey('localFocalPoint')
+                ? namedArgs['localFocalPoint']
+                : null,
+            pointerCount: namedArgs.containsKey('pointerCount')
+                ? namedArgs['pointerCount']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +34,7 @@ extension ScaleStartDetailsBinding on ScaleStartDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaleStartDetails');
+        return const HTType('ScaleStartDetails');
       case 'focalPoint':
         return focalPoint;
       case 'localFocalPoint':
@@ -38,7 +44,7 @@ extension ScaleStartDetailsBinding on ScaleStartDetails {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,15 +57,26 @@ class ScaleUpdateDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ScaleUpdateDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => ScaleUpdateDetails(
-            focalPoint: namedArgs.containsKey('focalPoint') ? namedArgs['focalPoint'] : Offset.zero,
-            localFocalPoint: namedArgs.containsKey('localFocalPoint') ? namedArgs['localFocalPoint'] : null,
+            focalPoint: namedArgs.containsKey('focalPoint')
+                ? namedArgs['focalPoint']
+                : Offset.zero,
+            localFocalPoint: namedArgs.containsKey('localFocalPoint')
+                ? namedArgs['localFocalPoint']
+                : null,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
-            horizontalScale: namedArgs.containsKey('horizontalScale') ? namedArgs['horizontalScale'] : 1.0,
-            verticalScale: namedArgs.containsKey('verticalScale') ? namedArgs['verticalScale'] : 1.0,
-            rotation: namedArgs.containsKey('rotation') ? namedArgs['rotation'] : 0.0,
-            pointerCount: namedArgs.containsKey('pointerCount') ? namedArgs['pointerCount'] : 0);
+            horizontalScale: namedArgs.containsKey('horizontalScale')
+                ? namedArgs['horizontalScale']
+                : 1.0,
+            verticalScale: namedArgs.containsKey('verticalScale')
+                ? namedArgs['verticalScale']
+                : 1.0,
+            rotation:
+                namedArgs.containsKey('rotation') ? namedArgs['rotation'] : 0.0,
+            pointerCount: namedArgs.containsKey('pointerCount')
+                ? namedArgs['pointerCount']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -73,7 +90,7 @@ extension ScaleUpdateDetailsBinding on ScaleUpdateDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaleUpdateDetails');
+        return const HTType('ScaleUpdateDetails');
       case 'focalPoint':
         return focalPoint;
       case 'localFocalPoint':
@@ -91,7 +108,7 @@ extension ScaleUpdateDetailsBinding on ScaleUpdateDetails {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -104,10 +121,14 @@ class ScaleEndDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ScaleEndDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => ScaleEndDetails(
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : Velocity.zero,
-            pointerCount: namedArgs.containsKey('pointerCount') ? namedArgs['pointerCount'] : 0);
+            velocity: namedArgs.containsKey('velocity')
+                ? namedArgs['velocity']
+                : Velocity.zero,
+            pointerCount: namedArgs.containsKey('pointerCount')
+                ? namedArgs['pointerCount']
+                : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -121,7 +142,7 @@ extension ScaleEndDetailsBinding on ScaleEndDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaleEndDetails');
+        return const HTType('ScaleEndDetails');
       case 'velocity':
         return velocity;
       case 'pointerCount':
@@ -129,7 +150,7 @@ extension ScaleEndDetailsBinding on ScaleEndDetails {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -141,13 +162,17 @@ class ScaleGestureRecognizerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScaleGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScaleGestureRecognizer(
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null,
-            kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.down);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScaleGestureRecognizer(
+                debugOwner: namedArgs.containsKey('debugOwner')
+                    ? namedArgs['debugOwner']
+                    : null,
+                kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null,
+                dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                    ? namedArgs['dragStartBehavior']
+                    : DragStartBehavior.down);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -166,7 +191,7 @@ extension ScaleGestureRecognizerBinding on ScaleGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaleGestureRecognizer');
+        return const HTType('ScaleGestureRecognizer');
       case 'dragStartBehavior':
         return dragStartBehavior;
       case 'onStart':
@@ -182,35 +207,54 @@ extension ScaleGestureRecognizerBinding on ScaleGestureRecognizer {
       case 'team':
         return team;
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPointer(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -218,9 +262,10 @@ extension ScaleGestureRecognizerBinding on ScaleGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -239,7 +284,7 @@ extension ScaleGestureRecognizerBinding on ScaleGestureRecognizer {
         onEnd = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/tap.g.dart b/lib/bindings/flutter/gestures/tap.g.dart
index 5057b65..f408727 100644
--- a/lib/bindings/flutter/gestures/tap.g.dart
+++ b/lib/bindings/flutter/gestures/tap.g.dart
@@ -10,11 +10,15 @@ class TapDownDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TapDownDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => TapDownDetails(
-            globalPosition: namedArgs.containsKey('globalPosition') ? namedArgs['globalPosition'] : Offset.zero,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null,
+            globalPosition: namedArgs.containsKey('globalPosition')
+                ? namedArgs['globalPosition']
+                : Offset.zero,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null,
             kind: namedArgs.containsKey('kind') ? namedArgs['kind'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +32,7 @@ extension TapDownDetailsBinding on TapDownDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TapDownDetails');
+        return const HTType('TapDownDetails');
       case 'globalPosition':
         return globalPosition;
       case 'kind':
@@ -36,7 +40,7 @@ extension TapDownDetailsBinding on TapDownDetails {
       case 'localPosition':
         return localPosition;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,10 +54,14 @@ class TapUpDetailsAutoBinding extends HTExternalClass {
       case 'TapUpDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => TapUpDetails(
             kind: namedArgs['kind'],
-            globalPosition: namedArgs.containsKey('globalPosition') ? namedArgs['globalPosition'] : Offset.zero,
-            localPosition: namedArgs.containsKey('localPosition') ? namedArgs['localPosition'] : null);
+            globalPosition: namedArgs.containsKey('globalPosition')
+                ? namedArgs['globalPosition']
+                : Offset.zero,
+            localPosition: namedArgs.containsKey('localPosition')
+                ? namedArgs['localPosition']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,7 +75,7 @@ extension TapUpDetailsBinding on TapUpDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TapUpDetails');
+        return const HTType('TapUpDetails');
       case 'globalPosition':
         return globalPosition;
       case 'localPosition':
@@ -75,7 +83,7 @@ extension TapUpDetailsBinding on TapUpDetails {
       case 'kind':
         return kind;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -87,10 +95,12 @@ class TapGestureRecognizerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TapGestureRecognizer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TapGestureRecognizer(debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => TapGestureRecognizer(
+            debugOwner: namedArgs.containsKey('debugOwner')
+                ? namedArgs['debugOwner']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -109,7 +119,7 @@ extension TapGestureRecognizerBinding on TapGestureRecognizer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TapGestureRecognizer');
+        return const HTType('TapGestureRecognizer');
       case 'onTapDown':
         return onTapDown;
       case 'onTapUp':
@@ -151,43 +161,65 @@ extension TapGestureRecognizerBinding on TapGestureRecognizer {
       case 'team':
         return team;
       case 'isPointerAllowed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isPointerAllowed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isPointerAllowed(positionalArgs[0]);
       case 'addAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAllowedPointer(positionalArgs[0]);
       case 'handlePrimaryPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handlePrimaryPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handlePrimaryPointer(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'didExceedDeadline':
         return ({positionalArgs, namedArgs, typeArgs}) => didExceedDeadline();
       case 'acceptGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => acceptGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            acceptGesture(positionalArgs[0]);
       case 'rejectGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => rejectGesture(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rejectGesture(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0]);
       case 'didStopTrackingLastPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStopTrackingLastPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStopTrackingLastPointer(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'handleNonAllowedPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleNonAllowedPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleNonAllowedPointer(positionalArgs[0]);
       case 'addPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPointer(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            addPointer(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -195,9 +227,10 @@ extension TapGestureRecognizerBinding on TapGestureRecognizer {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -246,7 +279,7 @@ extension TapGestureRecognizerBinding on TapGestureRecognizer {
         initialPosition = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/team.g.dart b/lib/bindings/flutter/gestures/team.g.dart
index f67bb59..3d35a41 100644
--- a/lib/bindings/flutter/gestures/team.g.dart
+++ b/lib/bindings/flutter/gestures/team.g.dart
@@ -10,7 +10,7 @@ class GestureArenaTeamAutoBinding extends HTExternalClass {
       case 'GestureArenaTeam':
         return ({positionalArgs, namedArgs, typeArgs}) => GestureArenaTeam();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,13 +29,14 @@ extension GestureArenaTeamBinding on GestureArenaTeam {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GestureArenaTeam');
+        return const HTType('GestureArenaTeam');
       case 'captain':
         return captain;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,7 +46,7 @@ extension GestureArenaTeamBinding on GestureArenaTeam {
         captain = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/gestures/velocity_tracker.g.dart b/lib/bindings/flutter/gestures/velocity_tracker.g.dart
index c11fccb..6317eff 100644
--- a/lib/bindings/flutter/gestures/velocity_tracker.g.dart
+++ b/lib/bindings/flutter/gestures/velocity_tracker.g.dart
@@ -8,11 +8,12 @@ class VelocityAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Velocity':
-        return ({positionalArgs, namedArgs, typeArgs}) => Velocity(pixelsPerSecond: namedArgs['pixelsPerSecond']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Velocity(pixelsPerSecond: namedArgs['pixelsPerSecond']);
       case 'Velocity.zero':
         return Velocity.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,17 +27,18 @@ extension VelocityBinding on Velocity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Velocity');
+        return const HTType('Velocity');
       case 'pixelsPerSecond':
         return pixelsPerSecond;
       case 'hashCode':
         return hashCode;
       case 'clampMagnitude':
-        return ({positionalArgs, namedArgs, typeArgs}) => clampMagnitude(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            clampMagnitude(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,7 +56,7 @@ class VelocityEstimateAutoBinding extends HTExternalClass {
             duration: namedArgs['duration'],
             offset: namedArgs['offset']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -68,7 +70,7 @@ extension VelocityEstimateBinding on VelocityEstimate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VelocityEstimate');
+        return const HTType('VelocityEstimate');
       case 'pixelsPerSecond':
         return pixelsPerSecond;
       case 'confidence':
@@ -80,7 +82,7 @@ extension VelocityEstimateBinding on VelocityEstimate {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -92,9 +94,10 @@ class VelocityTrackerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'VelocityTracker.withKind':
-        return ({positionalArgs, namedArgs, typeArgs}) => VelocityTracker.withKind(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            VelocityTracker.withKind(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -108,31 +111,34 @@ extension VelocityTrackerBinding on VelocityTracker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VelocityTracker');
+        return const HTType('VelocityTracker');
       case 'kind':
         return kind;
       case 'addPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPosition(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPosition(positionalArgs[0], positionalArgs[1]);
       case 'getVelocityEstimate':
         return ({positionalArgs, namedArgs, typeArgs}) => getVelocityEstimate();
       case 'getVelocity':
         return ({positionalArgs, namedArgs, typeArgs}) => getVelocity();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class IOSScrollViewFlingVelocityTrackerAutoBinding extends HTExternalClass {
-  IOSScrollViewFlingVelocityTrackerAutoBinding() : super('IOSScrollViewFlingVelocityTracker');
+  IOSScrollViewFlingVelocityTrackerAutoBinding()
+      : super('IOSScrollViewFlingVelocityTracker');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IOSScrollViewFlingVelocityTracker':
-        return ({positionalArgs, namedArgs, typeArgs}) => IOSScrollViewFlingVelocityTracker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            IOSScrollViewFlingVelocityTracker(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -142,21 +148,23 @@ class IOSScrollViewFlingVelocityTrackerAutoBinding extends HTExternalClass {
   }
 }
 
-extension IOSScrollViewFlingVelocityTrackerBinding on IOSScrollViewFlingVelocityTracker {
+extension IOSScrollViewFlingVelocityTrackerBinding
+    on IOSScrollViewFlingVelocityTracker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IOSScrollViewFlingVelocityTracker');
+        return const HTType('IOSScrollViewFlingVelocityTracker');
       case 'kind':
         return kind;
       case 'addPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPosition(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPosition(positionalArgs[0], positionalArgs[1]);
       case 'getVelocityEstimate':
         return ({positionalArgs, namedArgs, typeArgs}) => getVelocityEstimate();
       case 'getVelocity':
         return ({positionalArgs, namedArgs, typeArgs}) => getVelocity();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/about.g.dart b/lib/bindings/flutter/material/about.g.dart
index 7342ae3..dbbd5a9 100644
--- a/lib/bindings/flutter/material/about.g.dart
+++ b/lib/bindings/flutter/material/about.g.dart
@@ -14,15 +14,24 @@ class AboutListTileAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             icon: namedArgs.containsKey('icon') ? namedArgs['icon'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            applicationName: namedArgs.containsKey('applicationName') ? namedArgs['applicationName'] : null,
-            applicationVersion: namedArgs.containsKey('applicationVersion') ? namedArgs['applicationVersion'] : null,
-            applicationIcon: namedArgs.containsKey('applicationIcon') ? namedArgs['applicationIcon'] : null,
-            applicationLegalese: namedArgs.containsKey('applicationLegalese') ? namedArgs['applicationLegalese'] : null,
-            aboutBoxChildren:
-                namedArgs.containsKey('aboutBoxChildren') ? List<Widget>.from(namedArgs['aboutBoxChildren']) : null,
+            applicationName: namedArgs.containsKey('applicationName')
+                ? namedArgs['applicationName']
+                : null,
+            applicationVersion: namedArgs.containsKey('applicationVersion')
+                ? namedArgs['applicationVersion']
+                : null,
+            applicationIcon: namedArgs.containsKey('applicationIcon')
+                ? namedArgs['applicationIcon']
+                : null,
+            applicationLegalese: namedArgs.containsKey('applicationLegalese')
+                ? namedArgs['applicationLegalese']
+                : null,
+            aboutBoxChildren: namedArgs.containsKey('aboutBoxChildren')
+                ? List<Widget>.from(namedArgs['aboutBoxChildren'])
+                : null,
             dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,7 +45,7 @@ extension AboutListTileBinding on AboutListTile {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AboutListTile');
+        return const HTType('AboutListTile');
       case 'icon':
         return icon;
       case 'child':
@@ -58,31 +67,44 @@ extension AboutListTileBinding on AboutListTile {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -96,13 +118,23 @@ class AboutDialogAutoBinding extends HTExternalClass {
       case 'AboutDialog':
         return ({positionalArgs, namedArgs, typeArgs}) => AboutDialog(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            applicationName: namedArgs.containsKey('applicationName') ? namedArgs['applicationName'] : null,
-            applicationVersion: namedArgs.containsKey('applicationVersion') ? namedArgs['applicationVersion'] : null,
-            applicationIcon: namedArgs.containsKey('applicationIcon') ? namedArgs['applicationIcon'] : null,
-            applicationLegalese: namedArgs.containsKey('applicationLegalese') ? namedArgs['applicationLegalese'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : null);
+            applicationName: namedArgs.containsKey('applicationName')
+                ? namedArgs['applicationName']
+                : null,
+            applicationVersion: namedArgs.containsKey('applicationVersion')
+                ? namedArgs['applicationVersion']
+                : null,
+            applicationIcon: namedArgs.containsKey('applicationIcon')
+                ? namedArgs['applicationIcon']
+                : null,
+            applicationLegalese: namedArgs.containsKey('applicationLegalese')
+                ? namedArgs['applicationLegalese']
+                : null,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -116,7 +148,7 @@ extension AboutDialogBinding on AboutDialog {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AboutDialog');
+        return const HTType('AboutDialog');
       case 'applicationName':
         return applicationName;
       case 'applicationVersion':
@@ -132,31 +164,44 @@ extension AboutDialogBinding on AboutDialog {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -170,13 +215,20 @@ class LicensePageAutoBinding extends HTExternalClass {
       case 'LicensePage':
         return ({positionalArgs, namedArgs, typeArgs}) => LicensePage(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            applicationName: namedArgs.containsKey('applicationName') ? namedArgs['applicationName'] : null,
-            applicationVersion: namedArgs.containsKey('applicationVersion') ? namedArgs['applicationVersion'] : null,
-            applicationIcon: namedArgs.containsKey('applicationIcon') ? namedArgs['applicationIcon'] : null,
-            applicationLegalese:
-                namedArgs.containsKey('applicationLegalese') ? namedArgs['applicationLegalese'] : null);
+            applicationName: namedArgs.containsKey('applicationName')
+                ? namedArgs['applicationName']
+                : null,
+            applicationVersion: namedArgs.containsKey('applicationVersion')
+                ? namedArgs['applicationVersion']
+                : null,
+            applicationIcon: namedArgs.containsKey('applicationIcon')
+                ? namedArgs['applicationIcon']
+                : null,
+            applicationLegalese: namedArgs.containsKey('applicationLegalese')
+                ? namedArgs['applicationLegalese']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -190,7 +242,7 @@ extension LicensePageBinding on LicensePage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LicensePage');
+        return const HTType('LicensePage');
       case 'applicationName':
         return applicationName;
       case 'applicationVersion':
@@ -210,25 +262,37 @@ extension LicensePageBinding on LicensePage {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/animated_icons.g.dart b/lib/bindings/flutter/material/animated_icons.g.dart
index 710258f..de249d5 100644
--- a/lib/bindings/flutter/material/animated_icons.g.dart
+++ b/lib/bindings/flutter/material/animated_icons.g.dart
@@ -15,10 +15,14 @@ class AnimatedIconAutoBinding extends HTExternalClass {
             progress: namedArgs['progress'],
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +36,7 @@ extension AnimatedIconBinding on AnimatedIcon {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedIcon');
+        return const HTType('AnimatedIcon');
       case 'progress':
         return progress;
       case 'color':
@@ -50,31 +54,44 @@ extension AnimatedIconBinding on AnimatedIcon {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/animated_icons_data.g.dart b/lib/bindings/flutter/material/animated_icons_data.g.dart
index a50660d..65454c9 100644
--- a/lib/bindings/flutter/material/animated_icons_data.g.dart
+++ b/lib/bindings/flutter/material/animated_icons_data.g.dart
@@ -36,7 +36,7 @@ class AnimatedIconsAutoBinding extends HTExternalClass {
       case 'AnimatedIcons.view_list':
         return AnimatedIcons.view_list;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/app.g.dart b/lib/bindings/flutter/material/app.g.dart
index b5cf9ac..05ac853 100644
--- a/lib/bindings/flutter/material/app.g.dart
+++ b/lib/bindings/flutter/material/app.g.dart
@@ -20,7 +20,7 @@ class ThemeModeAutoBinding extends HTExternalClass {
       case 'ThemeMode.dark':
         return ThemeMode.dark;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,13 +28,14 @@ class ThemeModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ThemeMode');
+        return const HTType('ThemeMode');
       case 'index':
         return (instance as ThemeMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ThemeMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ThemeMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,108 +49,136 @@ class MaterialAppAutoBinding extends HTExternalClass {
       case 'MaterialApp':
         return ({positionalArgs, namedArgs, typeArgs}) => MaterialApp(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            navigatorKey: namedArgs.containsKey('navigatorKey') ? namedArgs['navigatorKey'] : null,
-            scaffoldMessengerKey:
-                namedArgs.containsKey('scaffoldMessengerKey') ? namedArgs['scaffoldMessengerKey'] : null,
+            navigatorKey: namedArgs.containsKey('navigatorKey')
+                ? namedArgs['navigatorKey']
+                : null,
+            scaffoldMessengerKey: namedArgs.containsKey('scaffoldMessengerKey')
+                ? namedArgs['scaffoldMessengerKey']
+                : null,
             home: namedArgs.containsKey('home') ? namedArgs['home'] : null,
-            routes: namedArgs.containsKey('routes') ? namedArgs['routes'] : const <String, WidgetBuilder>{},
-            initialRoute: namedArgs.containsKey('initialRoute') ? namedArgs['initialRoute'] : null,
-            onGenerateRoute: namedArgs.containsKey('onGenerateRoute') ? namedArgs['onGenerateRoute'] : null,
-            onGenerateInitialRoutes:
-                namedArgs.containsKey('onGenerateInitialRoutes') ? namedArgs['onGenerateInitialRoutes'] : null,
-            onUnknownRoute: namedArgs.containsKey('onUnknownRoute') ? namedArgs['onUnknownRoute'] : null,
+            routes: namedArgs.containsKey('routes')
+                ? namedArgs['routes']
+                : const <String, WidgetBuilder>{},
+            initialRoute: namedArgs.containsKey('initialRoute')
+                ? namedArgs['initialRoute']
+                : null,
+            onGenerateRoute: namedArgs.containsKey('onGenerateRoute')
+                ? namedArgs['onGenerateRoute']
+                : null,
+            onGenerateInitialRoutes: namedArgs.containsKey('onGenerateInitialRoutes')
+                ? namedArgs['onGenerateInitialRoutes']
+                : null,
+            onUnknownRoute: namedArgs.containsKey('onUnknownRoute')
+                ? namedArgs['onUnknownRoute']
+                : null,
             navigatorObservers: namedArgs.containsKey('navigatorObservers')
                 ? List<NavigatorObserver>.from(namedArgs['navigatorObservers'])
                 : const <NavigatorObserver>[],
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : '',
-            onGenerateTitle: namedArgs.containsKey('onGenerateTitle') ? namedArgs['onGenerateTitle'] : null,
+            onGenerateTitle: namedArgs.containsKey('onGenerateTitle')
+                ? namedArgs['onGenerateTitle']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             theme: namedArgs.containsKey('theme') ? namedArgs['theme'] : null,
-            darkTheme: namedArgs.containsKey('darkTheme') ? namedArgs['darkTheme'] : null,
-            highContrastTheme: namedArgs.containsKey('highContrastTheme') ? namedArgs['highContrastTheme'] : null,
-            highContrastDarkTheme:
-                namedArgs.containsKey('highContrastDarkTheme') ? namedArgs['highContrastDarkTheme'] : null,
-            themeMode: namedArgs.containsKey('themeMode') ? namedArgs['themeMode'] : ThemeMode.system,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            localizationsDelegates:
-                namedArgs.containsKey('localizationsDelegates') ? namedArgs['localizationsDelegates'] : null,
+            darkTheme: namedArgs.containsKey('darkTheme')
+                ? namedArgs['darkTheme']
+                : null,
+            highContrastTheme: namedArgs.containsKey('highContrastTheme')
+                ? namedArgs['highContrastTheme']
+                : null,
+            highContrastDarkTheme: namedArgs.containsKey('highContrastDarkTheme')
+                ? namedArgs['highContrastDarkTheme']
+                : null,
+            themeMode: namedArgs.containsKey('themeMode')
+                ? namedArgs['themeMode']
+                : ThemeMode.system,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            localizationsDelegates: namedArgs.containsKey('localizationsDelegates')
+                ? namedArgs['localizationsDelegates']
+                : null,
             localeListResolutionCallback: namedArgs.containsKey('localeListResolutionCallback')
                 ? namedArgs['localeListResolutionCallback']
                 : null,
-            localeResolutionCallback:
-                namedArgs.containsKey('localeResolutionCallback') ? namedArgs['localeResolutionCallback'] : null,
+            localeResolutionCallback: namedArgs.containsKey('localeResolutionCallback')
+                ? namedArgs['localeResolutionCallback']
+                : null,
             supportedLocales: namedArgs.containsKey('supportedLocales')
                 ? namedArgs['supportedLocales']
                 : const <Locale>[Locale('en', 'US')],
-            debugShowMaterialGrid:
-                namedArgs.containsKey('debugShowMaterialGrid') ? namedArgs['debugShowMaterialGrid'] : false,
-            showPerformanceOverlay:
-                namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
-            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
-                ? namedArgs['checkerboardRasterCacheImages']
-                : false,
-            checkerboardOffscreenLayers:
-                namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
-            showSemanticsDebugger:
-                namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
-            debugShowCheckedModeBanner:
-                namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
+            debugShowMaterialGrid: namedArgs.containsKey('debugShowMaterialGrid') ? namedArgs['debugShowMaterialGrid'] : false,
+            showPerformanceOverlay: namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
+            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages') ? namedArgs['checkerboardRasterCacheImages'] : false,
+            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
+            showSemanticsDebugger: namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
+            debugShowCheckedModeBanner: namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
             shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : null,
             actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
             restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
       case 'MaterialApp.router':
         return ({positionalArgs, namedArgs, typeArgs}) => MaterialApp.router(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scaffoldMessengerKey:
-                namedArgs.containsKey('scaffoldMessengerKey') ? namedArgs['scaffoldMessengerKey'] : null,
-            routeInformationProvider:
-                namedArgs.containsKey('routeInformationProvider') ? namedArgs['routeInformationProvider'] : null,
+            scaffoldMessengerKey: namedArgs.containsKey('scaffoldMessengerKey')
+                ? namedArgs['scaffoldMessengerKey']
+                : null,
+            routeInformationProvider: namedArgs.containsKey('routeInformationProvider')
+                ? namedArgs['routeInformationProvider']
+                : null,
             routeInformationParser: namedArgs['routeInformationParser'],
             routerDelegate: namedArgs['routerDelegate'],
-            backButtonDispatcher:
-                namedArgs.containsKey('backButtonDispatcher') ? namedArgs['backButtonDispatcher'] : null,
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            backButtonDispatcher: namedArgs.containsKey('backButtonDispatcher')
+                ? namedArgs['backButtonDispatcher']
+                : null,
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : '',
-            onGenerateTitle: namedArgs.containsKey('onGenerateTitle') ? namedArgs['onGenerateTitle'] : null,
+            onGenerateTitle: namedArgs.containsKey('onGenerateTitle')
+                ? namedArgs['onGenerateTitle']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             theme: namedArgs.containsKey('theme') ? namedArgs['theme'] : null,
-            darkTheme: namedArgs.containsKey('darkTheme') ? namedArgs['darkTheme'] : null,
-            highContrastTheme: namedArgs.containsKey('highContrastTheme') ? namedArgs['highContrastTheme'] : null,
-            highContrastDarkTheme:
-                namedArgs.containsKey('highContrastDarkTheme') ? namedArgs['highContrastDarkTheme'] : null,
-            themeMode: namedArgs.containsKey('themeMode') ? namedArgs['themeMode'] : ThemeMode.system,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            localizationsDelegates:
-                namedArgs.containsKey('localizationsDelegates') ? namedArgs['localizationsDelegates'] : null,
+            darkTheme: namedArgs.containsKey('darkTheme')
+                ? namedArgs['darkTheme']
+                : null,
+            highContrastTheme: namedArgs.containsKey('highContrastTheme')
+                ? namedArgs['highContrastTheme']
+                : null,
+            highContrastDarkTheme: namedArgs.containsKey('highContrastDarkTheme')
+                ? namedArgs['highContrastDarkTheme']
+                : null,
+            themeMode: namedArgs.containsKey('themeMode')
+                ? namedArgs['themeMode']
+                : ThemeMode.system,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            localizationsDelegates: namedArgs.containsKey('localizationsDelegates')
+                ? namedArgs['localizationsDelegates']
+                : null,
             localeListResolutionCallback: namedArgs.containsKey('localeListResolutionCallback')
                 ? namedArgs['localeListResolutionCallback']
                 : null,
-            localeResolutionCallback:
-                namedArgs.containsKey('localeResolutionCallback') ? namedArgs['localeResolutionCallback'] : null,
+            localeResolutionCallback: namedArgs.containsKey('localeResolutionCallback')
+                ? namedArgs['localeResolutionCallback']
+                : null,
             supportedLocales: namedArgs.containsKey('supportedLocales')
                 ? namedArgs['supportedLocales']
                 : const <Locale>[Locale('en', 'US')],
-            debugShowMaterialGrid:
-                namedArgs.containsKey('debugShowMaterialGrid') ? namedArgs['debugShowMaterialGrid'] : false,
-            showPerformanceOverlay:
-                namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
-            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
-                ? namedArgs['checkerboardRasterCacheImages']
-                : false,
-            checkerboardOffscreenLayers:
-                namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
-            showSemanticsDebugger:
-                namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
-            debugShowCheckedModeBanner:
-                namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
+            debugShowMaterialGrid: namedArgs.containsKey('debugShowMaterialGrid') ? namedArgs['debugShowMaterialGrid'] : false,
+            showPerformanceOverlay: namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
+            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages') ? namedArgs['checkerboardRasterCacheImages'] : false,
+            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
+            showSemanticsDebugger: namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
+            debugShowCheckedModeBanner: namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
             shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : null,
             actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
             restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
       case 'MaterialApp.createMaterialHeroController':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialApp.createMaterialHeroController();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialApp.createMaterialHeroController();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -160,18 +189,25 @@ class MaterialAppAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RouteFactory': (HTFunction function) =>
-          (settings) => function.call(positionalArgs: [settings], namedArgs: const {}) as Route<dynamic>?,
-      'InitialRouteListFactory': (HTFunction function) =>
-          (initialRoute) => function.call(positionalArgs: [initialRoute], namedArgs: const {}) as List<Route<dynamic>>,
-      'TransitionBuilder': (HTFunction function) =>
-          (context, child) => function.call(positionalArgs: [context, child], namedArgs: const {}) as Widget,
-      'GenerateAppTitle': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as String,
-      'LocaleListResolutionCallback': (HTFunction function) => (locales, supportedLocales) =>
-          function.call(positionalArgs: [locales, supportedLocales], namedArgs: const {}) as Locale?,
-      'LocaleResolutionCallback': (HTFunction function) => (locale, supportedLocales) =>
-          function.call(positionalArgs: [locale, supportedLocales], namedArgs: const {}) as Locale?,
+      'RouteFactory': (HTFunction function) => (settings) =>
+          function.call(positionalArgs: [settings], namedArgs: const {})
+              as Route<dynamic>?,
+      'InitialRouteListFactory': (HTFunction function) => (initialRoute) =>
+          function.call(positionalArgs: [initialRoute], namedArgs: const {})
+              as List<Route<dynamic>>,
+      'TransitionBuilder': (HTFunction function) => (context, child) =>
+          function.call(positionalArgs: [context, child], namedArgs: const {})
+              as Widget,
+      'GenerateAppTitle': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as String,
+      'LocaleListResolutionCallback': (HTFunction function) =>
+          (locales, supportedLocales) => function.call(
+              positionalArgs: [locales, supportedLocales],
+              namedArgs: const {}) as Locale?,
+      'LocaleResolutionCallback': (HTFunction function) =>
+          (locale, supportedLocales) => function.call(
+              positionalArgs: [locale, supportedLocales],
+              namedArgs: const {}) as Locale?,
     };
   }
 }
@@ -180,7 +216,7 @@ extension MaterialAppBinding on MaterialApp {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialApp');
+        return const HTType('MaterialApp');
       case 'navigatorKey':
         return navigatorKey;
       case 'scaffoldMessengerKey':
@@ -264,25 +300,37 @@ extension MaterialAppBinding on MaterialApp {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/app_bar.g.dart b/lib/bindings/flutter/material/app_bar.g.dart
index 7826533..3410644 100644
--- a/lib/bindings/flutter/material/app_bar.g.dart
+++ b/lib/bindings/flutter/material/app_bar.g.dart
@@ -13,38 +13,77 @@ class AppBarAutoBinding extends HTExternalClass {
       case 'AppBar':
         return ({positionalArgs, namedArgs, typeArgs}) => AppBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
             automaticallyImplyLeading:
-                namedArgs.containsKey('automaticallyImplyLeading') ? namedArgs['automaticallyImplyLeading'] : true,
+                namedArgs.containsKey('automaticallyImplyLeading')
+                    ? namedArgs['automaticallyImplyLeading']
+                    : true,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            actions: namedArgs.containsKey('actions') ? List<Widget>.from(namedArgs['actions']) : null,
-            flexibleSpace: namedArgs.containsKey('flexibleSpace') ? namedArgs['flexibleSpace'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
+            actions: namedArgs.containsKey('actions')
+                ? List<Widget>.from(namedArgs['actions'])
+                : null,
+            flexibleSpace: namedArgs.containsKey('flexibleSpace')
+                ? namedArgs['flexibleSpace']
+                : null,
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            iconTheme: namedArgs.containsKey('iconTheme') ? namedArgs['iconTheme'] : null,
-            actionsIconTheme: namedArgs.containsKey('actionsIconTheme') ? namedArgs['actionsIconTheme'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : true,
-            centerTitle: namedArgs.containsKey('centerTitle') ? namedArgs['centerTitle'] : null,
-            excludeHeaderSemantics:
-                namedArgs.containsKey('excludeHeaderSemantics') ? namedArgs['excludeHeaderSemantics'] : false,
-            titleSpacing: namedArgs.containsKey('titleSpacing') ? namedArgs['titleSpacing'] : null,
-            toolbarOpacity: namedArgs.containsKey('toolbarOpacity') ? namedArgs['toolbarOpacity'] : 1.0,
-            bottomOpacity: namedArgs.containsKey('bottomOpacity') ? namedArgs['bottomOpacity'] : 1.0,
-            toolbarHeight: namedArgs.containsKey('toolbarHeight') ? namedArgs['toolbarHeight'] : null,
-            leadingWidth: namedArgs.containsKey('leadingWidth') ? namedArgs['leadingWidth'] : null,
-            backwardsCompatibility:
-                namedArgs.containsKey('backwardsCompatibility') ? namedArgs['backwardsCompatibility'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            iconTheme: namedArgs.containsKey('iconTheme')
+                ? namedArgs['iconTheme']
+                : null,
+            actionsIconTheme: namedArgs.containsKey('actionsIconTheme')
+                ? namedArgs['actionsIconTheme']
+                : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : true,
+            centerTitle: namedArgs.containsKey('centerTitle')
+                ? namedArgs['centerTitle']
+                : null,
+            excludeHeaderSemantics: namedArgs.containsKey('excludeHeaderSemantics')
+                ? namedArgs['excludeHeaderSemantics']
+                : false,
+            titleSpacing: namedArgs.containsKey('titleSpacing')
+                ? namedArgs['titleSpacing']
+                : null,
+            toolbarOpacity: namedArgs.containsKey('toolbarOpacity')
+                ? namedArgs['toolbarOpacity']
+                : 1.0,
+            bottomOpacity: namedArgs.containsKey('bottomOpacity')
+                ? namedArgs['bottomOpacity']
+                : 1.0,
+            toolbarHeight: namedArgs.containsKey('toolbarHeight')
+                ? namedArgs['toolbarHeight']
+                : null,
+            leadingWidth: namedArgs.containsKey('leadingWidth')
+                ? namedArgs['leadingWidth']
+                : null,
+            backwardsCompatibility: namedArgs.containsKey('backwardsCompatibility')
+                ? namedArgs['backwardsCompatibility']
+                : null,
             toolbarTextStyle: namedArgs.containsKey('toolbarTextStyle') ? namedArgs['toolbarTextStyle'] : null,
             titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
             systemOverlayStyle: namedArgs.containsKey('systemOverlayStyle') ? namedArgs['systemOverlayStyle'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -58,7 +97,7 @@ extension AppBarBinding on AppBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AppBar');
+        return const HTType('AppBar');
       case 'leading':
         return leading;
       case 'automaticallyImplyLeading':
@@ -126,25 +165,37 @@ extension AppBarBinding on AppBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -158,46 +209,84 @@ class SliverAppBarAutoBinding extends HTExternalClass {
       case 'SliverAppBar':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverAppBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
             automaticallyImplyLeading:
-                namedArgs.containsKey('automaticallyImplyLeading') ? namedArgs['automaticallyImplyLeading'] : true,
+                namedArgs.containsKey('automaticallyImplyLeading')
+                    ? namedArgs['automaticallyImplyLeading']
+                    : true,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            actions: namedArgs.containsKey('actions') ? List<Widget>.from(namedArgs['actions']) : null,
-            flexibleSpace: namedArgs.containsKey('flexibleSpace') ? namedArgs['flexibleSpace'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            forceElevated: namedArgs.containsKey('forceElevated') ? namedArgs['forceElevated'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            iconTheme: namedArgs.containsKey('iconTheme') ? namedArgs['iconTheme'] : null,
-            actionsIconTheme: namedArgs.containsKey('actionsIconTheme') ? namedArgs['actionsIconTheme'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : true,
-            centerTitle: namedArgs.containsKey('centerTitle') ? namedArgs['centerTitle'] : null,
-            excludeHeaderSemantics:
-                namedArgs.containsKey('excludeHeaderSemantics') ? namedArgs['excludeHeaderSemantics'] : false,
-            titleSpacing: namedArgs.containsKey('titleSpacing') ? namedArgs['titleSpacing'] : null,
-            collapsedHeight: namedArgs.containsKey('collapsedHeight') ? namedArgs['collapsedHeight'] : null,
-            expandedHeight: namedArgs.containsKey('expandedHeight') ? namedArgs['expandedHeight'] : null,
-            floating: namedArgs.containsKey('floating') ? namedArgs['floating'] : false,
-            pinned: namedArgs.containsKey('pinned') ? namedArgs['pinned'] : false,
+            actions: namedArgs.containsKey('actions')
+                ? List<Widget>.from(namedArgs['actions'])
+                : null,
+            flexibleSpace: namedArgs.containsKey('flexibleSpace')
+                ? namedArgs['flexibleSpace']
+                : null,
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            forceElevated: namedArgs.containsKey('forceElevated')
+                ? namedArgs['forceElevated']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            iconTheme: namedArgs.containsKey('iconTheme')
+                ? namedArgs['iconTheme']
+                : null,
+            actionsIconTheme: namedArgs.containsKey('actionsIconTheme')
+                ? namedArgs['actionsIconTheme']
+                : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : true,
+            centerTitle: namedArgs.containsKey('centerTitle')
+                ? namedArgs['centerTitle']
+                : null,
+            excludeHeaderSemantics: namedArgs.containsKey('excludeHeaderSemantics')
+                ? namedArgs['excludeHeaderSemantics']
+                : false,
+            titleSpacing: namedArgs.containsKey('titleSpacing')
+                ? namedArgs['titleSpacing']
+                : null,
+            collapsedHeight: namedArgs.containsKey('collapsedHeight')
+                ? namedArgs['collapsedHeight']
+                : null,
+            expandedHeight: namedArgs.containsKey('expandedHeight')
+                ? namedArgs['expandedHeight']
+                : null,
+            floating: namedArgs.containsKey('floating')
+                ? namedArgs['floating']
+                : false,
+            pinned:
+                namedArgs.containsKey('pinned') ? namedArgs['pinned'] : false,
             snap: namedArgs.containsKey('snap') ? namedArgs['snap'] : false,
-            stretch: namedArgs.containsKey('stretch') ? namedArgs['stretch'] : false,
-            stretchTriggerOffset:
-                namedArgs.containsKey('stretchTriggerOffset') ? namedArgs['stretchTriggerOffset'] : 100.0,
+            stretch:
+                namedArgs.containsKey('stretch') ? namedArgs['stretch'] : false,
+            stretchTriggerOffset: namedArgs.containsKey('stretchTriggerOffset') ? namedArgs['stretchTriggerOffset'] : 100.0,
             onStretchTrigger: namedArgs.containsKey('onStretchTrigger') ? namedArgs['onStretchTrigger'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
             toolbarHeight: namedArgs.containsKey('toolbarHeight') ? namedArgs['toolbarHeight'] : kToolbarHeight,
             leadingWidth: namedArgs.containsKey('leadingWidth') ? namedArgs['leadingWidth'] : null,
-            backwardsCompatibility:
-                namedArgs.containsKey('backwardsCompatibility') ? namedArgs['backwardsCompatibility'] : true,
+            backwardsCompatibility: namedArgs.containsKey('backwardsCompatibility') ? namedArgs['backwardsCompatibility'] : true,
             toolbarTextStyle: namedArgs.containsKey('toolbarTextStyle') ? namedArgs['toolbarTextStyle'] : null,
             titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
             systemOverlayStyle: namedArgs.containsKey('systemOverlayStyle') ? namedArgs['systemOverlayStyle'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -208,8 +297,8 @@ class SliverAppBarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'AsyncCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
+      'AsyncCallback': (HTFunction function) => () => function
+          .call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
     };
   }
 }
@@ -218,7 +307,7 @@ extension SliverAppBarBinding on SliverAppBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverAppBar');
+        return const HTType('SliverAppBar');
       case 'leading':
         return leading;
       case 'automaticallyImplyLeading':
@@ -298,25 +387,37 @@ extension SliverAppBarBinding on SliverAppBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/app_bar_theme.g.dart b/lib/bindings/flutter/material/app_bar_theme.g.dart
index b9634df..2e16dfc 100644
--- a/lib/bindings/flutter/material/app_bar_theme.g.dart
+++ b/lib/bindings/flutter/material/app_bar_theme.g.dart
@@ -11,29 +11,58 @@ class AppBarThemeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'AppBarTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => AppBarTheme(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            iconTheme: namedArgs.containsKey('iconTheme') ? namedArgs['iconTheme'] : null,
-            actionsIconTheme: namedArgs.containsKey('actionsIconTheme') ? namedArgs['actionsIconTheme'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            centerTitle: namedArgs.containsKey('centerTitle') ? namedArgs['centerTitle'] : null,
-            titleSpacing: namedArgs.containsKey('titleSpacing') ? namedArgs['titleSpacing'] : null,
-            toolbarTextStyle: namedArgs.containsKey('toolbarTextStyle') ? namedArgs['toolbarTextStyle'] : null,
-            titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
-            systemOverlayStyle: namedArgs.containsKey('systemOverlayStyle') ? namedArgs['systemOverlayStyle'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            iconTheme: namedArgs.containsKey('iconTheme')
+                ? namedArgs['iconTheme']
+                : null,
+            actionsIconTheme: namedArgs.containsKey('actionsIconTheme')
+                ? namedArgs['actionsIconTheme']
+                : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            centerTitle: namedArgs.containsKey('centerTitle')
+                ? namedArgs['centerTitle']
+                : null,
+            titleSpacing: namedArgs.containsKey('titleSpacing')
+                ? namedArgs['titleSpacing']
+                : null,
+            toolbarTextStyle: namedArgs.containsKey('toolbarTextStyle')
+                ? namedArgs['toolbarTextStyle']
+                : null,
+            titleTextStyle: namedArgs.containsKey('titleTextStyle')
+                ? namedArgs['titleTextStyle']
+                : null,
+            systemOverlayStyle: namedArgs.containsKey('systemOverlayStyle')
+                ? namedArgs['systemOverlayStyle']
+                : null,
             backwardsCompatibility:
-                namedArgs.containsKey('backwardsCompatibility') ? namedArgs['backwardsCompatibility'] : null);
+                namedArgs.containsKey('backwardsCompatibility')
+                    ? namedArgs['backwardsCompatibility']
+                    : null);
       case 'AppBarTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => AppBarTheme.of(positionalArgs[0]);
-      case 'AppBarTheme.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            AppBarTheme.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            AppBarTheme.of(positionalArgs[0]);
+      case 'AppBarTheme.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => AppBarTheme.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -47,7 +76,7 @@ extension AppBarThemeBinding on AppBarTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AppBarTheme');
+        return const HTType('AppBarTheme');
       case 'brightness':
         return brightness;
       case 'backgroundColor':
@@ -82,35 +111,66 @@ extension AppBarThemeBinding on AppBarTheme {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            actionsIconTheme: namedArgs.containsKey('actionsIconTheme') ? namedArgs['actionsIconTheme'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
+            actionsIconTheme: namedArgs.containsKey('actionsIconTheme')
+                ? namedArgs['actionsIconTheme']
+                : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            iconTheme: namedArgs.containsKey('iconTheme') ? namedArgs['iconTheme'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            centerTitle: namedArgs.containsKey('centerTitle') ? namedArgs['centerTitle'] : null,
-            titleSpacing: namedArgs.containsKey('titleSpacing') ? namedArgs['titleSpacing'] : null,
-            toolbarTextStyle: namedArgs.containsKey('toolbarTextStyle') ? namedArgs['toolbarTextStyle'] : null,
-            titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
-            systemOverlayStyle: namedArgs.containsKey('systemOverlayStyle') ? namedArgs['systemOverlayStyle'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            iconTheme: namedArgs.containsKey('iconTheme')
+                ? namedArgs['iconTheme']
+                : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            centerTitle: namedArgs.containsKey('centerTitle')
+                ? namedArgs['centerTitle']
+                : null,
+            titleSpacing: namedArgs.containsKey('titleSpacing')
+                ? namedArgs['titleSpacing']
+                : null,
+            toolbarTextStyle: namedArgs.containsKey('toolbarTextStyle')
+                ? namedArgs['toolbarTextStyle']
+                : null,
+            titleTextStyle: namedArgs.containsKey('titleTextStyle')
+                ? namedArgs['titleTextStyle']
+                : null,
+            systemOverlayStyle: namedArgs.containsKey('systemOverlayStyle')
+                ? namedArgs['systemOverlayStyle']
+                : null,
             backwardsCompatibility:
-                namedArgs.containsKey('backwardsCompatibility') ? namedArgs['backwardsCompatibility'] : null);
+                namedArgs.containsKey('backwardsCompatibility')
+                    ? namedArgs['backwardsCompatibility']
+                    : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/arc.g.dart b/lib/bindings/flutter/material/arc.g.dart
index 4abfdd1..c9caf7b 100644
--- a/lib/bindings/flutter/material/arc.g.dart
+++ b/lib/bindings/flutter/material/arc.g.dart
@@ -12,7 +12,7 @@ class MaterialPointArcTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +31,7 @@ extension MaterialPointArcTweenBinding on MaterialPointArcTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialPointArcTween');
+        return const HTType('MaterialPointArcTween');
       case 'center':
         return center;
       case 'radius':
@@ -41,19 +41,24 @@ extension MaterialPointArcTweenBinding on MaterialPointArcTween {
       case 'endAngle':
         return endAngle;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +71,7 @@ extension MaterialPointArcTweenBinding on MaterialPointArcTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -82,7 +87,7 @@ class MaterialRectArcTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -101,25 +106,30 @@ extension MaterialRectArcTweenBinding on MaterialRectArcTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialRectArcTween');
+        return const HTType('MaterialRectArcTween');
       case 'beginArc':
         return beginArc;
       case 'endArc':
         return endArc;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -132,7 +142,7 @@ extension MaterialRectArcTweenBinding on MaterialRectArcTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -144,11 +154,13 @@ class MaterialRectCenterArcTweenAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialRectCenterArcTween':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialRectCenterArcTween(
-            begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialRectCenterArcTween(
+                begin:
+                    namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
+                end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -167,23 +179,28 @@ extension MaterialRectCenterArcTweenBinding on MaterialRectCenterArcTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialRectCenterArcTween');
+        return const HTType('MaterialRectCenterArcTween');
       case 'centerArc':
         return centerArc;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -196,7 +213,7 @@ extension MaterialRectCenterArcTweenBinding on MaterialRectCenterArcTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/back_button.g.dart b/lib/bindings/flutter/material/back_button.g.dart
index 270422a..0c23989 100644
--- a/lib/bindings/flutter/material/back_button.g.dart
+++ b/lib/bindings/flutter/material/back_button.g.dart
@@ -9,10 +9,10 @@ class BackButtonIconAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BackButtonIcon':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BackButtonIcon(key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => BackButtonIcon(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,37 +26,50 @@ extension BackButtonIconBinding on BackButtonIcon {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BackButtonIcon');
+        return const HTType('BackButtonIcon');
       case 'key':
         return key;
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -71,9 +84,11 @@ class BackButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => BackButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null);
+            onPressed: namedArgs.containsKey('onPressed')
+                ? namedArgs['onPressed']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -84,7 +99,8 @@ class BackButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -93,7 +109,7 @@ extension BackButtonBinding on BackButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BackButton');
+        return const HTType('BackButton');
       case 'color':
         return color;
       case 'onPressed':
@@ -103,31 +119,44 @@ extension BackButtonBinding on BackButton {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -142,9 +171,11 @@ class CloseButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CloseButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null);
+            onPressed: namedArgs.containsKey('onPressed')
+                ? namedArgs['onPressed']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -155,7 +186,8 @@ class CloseButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -164,7 +196,7 @@ extension CloseButtonBinding on CloseButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CloseButton');
+        return const HTType('CloseButton');
       case 'color':
         return color;
       case 'onPressed':
@@ -174,31 +206,44 @@ extension CloseButtonBinding on CloseButton {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/banner.g.dart b/lib/bindings/flutter/material/banner.g.dart
index 6449216..9a5d59b 100644
--- a/lib/bindings/flutter/material/banner.g.dart
+++ b/lib/bindings/flutter/material/banner.g.dart
@@ -12,17 +12,28 @@ class MaterialBannerAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => MaterialBanner(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             content: namedArgs['content'],
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null,
+            contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                ? namedArgs['contentTextStyle']
+                : null,
             actions: List<Widget>.from(namedArgs['actions']),
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            leadingPadding: namedArgs.containsKey('leadingPadding') ? namedArgs['leadingPadding'] : null,
-            forceActionsBelow: namedArgs.containsKey('forceActionsBelow') ? namedArgs['forceActionsBelow'] : false,
-            overflowAlignment:
-                namedArgs.containsKey('overflowAlignment') ? namedArgs['overflowAlignment'] : OverflowBarAlignment.end);
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            leadingPadding: namedArgs.containsKey('leadingPadding')
+                ? namedArgs['leadingPadding']
+                : null,
+            forceActionsBelow: namedArgs.containsKey('forceActionsBelow')
+                ? namedArgs['forceActionsBelow']
+                : false,
+            overflowAlignment: namedArgs.containsKey('overflowAlignment')
+                ? namedArgs['overflowAlignment']
+                : OverflowBarAlignment.end);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,7 +47,7 @@ extension MaterialBannerBinding on MaterialBanner {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialBanner');
+        return const HTType('MaterialBanner');
       case 'content':
         return content;
       case 'contentTextStyle':
@@ -60,31 +71,44 @@ extension MaterialBannerBinding on MaterialBanner {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/banner_theme.g.dart b/lib/bindings/flutter/material/banner_theme.g.dart
index 90a8b65..d2b3d08 100644
--- a/lib/bindings/flutter/material/banner_theme.g.dart
+++ b/lib/bindings/flutter/material/banner_theme.g.dart
@@ -10,16 +10,26 @@ class MaterialBannerThemeDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialBannerThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialBannerThemeData(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            leadingPadding: namedArgs.containsKey('leadingPadding') ? namedArgs['leadingPadding'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialBannerThemeData(
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                    ? namedArgs['contentTextStyle']
+                    : null,
+                padding: namedArgs.containsKey('padding')
+                    ? namedArgs['padding']
+                    : null,
+                leadingPadding: namedArgs.containsKey('leadingPadding')
+                    ? namedArgs['leadingPadding']
+                    : null);
       case 'MaterialBannerThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            MaterialBannerThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            MaterialBannerThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +43,7 @@ extension MaterialBannerThemeDataBinding on MaterialBannerThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialBannerThemeData');
+        return const HTType('MaterialBannerThemeData');
       case 'backgroundColor':
         return backgroundColor;
       case 'contentTextStyle':
@@ -46,23 +56,33 @@ extension MaterialBannerThemeDataBinding on MaterialBannerThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            leadingPadding: namedArgs.containsKey('leadingPadding') ? namedArgs['leadingPadding'] : null);
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                ? namedArgs['contentTextStyle']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            leadingPadding: namedArgs.containsKey('leadingPadding')
+                ? namedArgs['leadingPadding']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,9 +99,10 @@ class MaterialBannerThemeAutoBinding extends HTExternalClass {
             data: namedArgs.containsKey('data') ? namedArgs['data'] : null,
             child: namedArgs['child']);
       case 'MaterialBannerTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialBannerTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialBannerTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -95,7 +116,7 @@ extension MaterialBannerThemeBinding on MaterialBannerTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialBannerTheme');
+        return const HTType('MaterialBannerTheme');
       case 'data':
         return data;
       case 'child':
@@ -105,33 +126,47 @@ extension MaterialBannerThemeBinding on MaterialBannerTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/bottom_app_bar.g.dart b/lib/bindings/flutter/material/bottom_app_bar.g.dart
index ec155b2..6a4113d 100644
--- a/lib/bindings/flutter/material/bottom_app_bar.g.dart
+++ b/lib/bindings/flutter/material/bottom_app_bar.g.dart
@@ -14,13 +14,19 @@ class BottomAppBarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => BottomAppBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            notchMargin: namedArgs.containsKey('notchMargin') ? namedArgs['notchMargin'] : 4.0,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            notchMargin: namedArgs.containsKey('notchMargin')
+                ? namedArgs['notchMargin']
+                : 4.0,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +40,7 @@ extension BottomAppBarBinding on BottomAppBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomAppBar');
+        return const HTType('BottomAppBar');
       case 'child':
         return child;
       case 'color':
@@ -58,25 +64,37 @@ extension BottomAppBarBinding on BottomAppBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/bottom_app_bar_theme.g.dart b/lib/bindings/flutter/material/bottom_app_bar_theme.g.dart
index a426f89..2133024 100644
--- a/lib/bindings/flutter/material/bottom_app_bar_theme.g.dart
+++ b/lib/bindings/flutter/material/bottom_app_bar_theme.g.dart
@@ -12,15 +12,19 @@ class BottomAppBarThemeAutoBinding extends HTExternalClass {
       case 'BottomAppBarTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => BottomAppBarTheme(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
       case 'BottomAppBarTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => BottomAppBarTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BottomAppBarTheme.of(positionalArgs[0]);
       case 'BottomAppBarTheme.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BottomAppBarTheme.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            BottomAppBarTheme.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +38,7 @@ extension BottomAppBarThemeBinding on BottomAppBarTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomAppBarTheme');
+        return const HTType('BottomAppBarTheme');
       case 'color':
         return color;
       case 'elevation':
@@ -46,21 +50,26 @@ extension BottomAppBarThemeBinding on BottomAppBarTheme {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/bottom_navigation_bar.g.dart b/lib/bindings/flutter/material/bottom_navigation_bar.g.dart
index 26c1db8..13c85da 100644
--- a/lib/bindings/flutter/material/bottom_navigation_bar.g.dart
+++ b/lib/bindings/flutter/material/bottom_navigation_bar.g.dart
@@ -16,7 +16,7 @@ class BottomNavigationBarTypeAutoBinding extends HTExternalClass {
       case 'BottomNavigationBarType.shifting':
         return BottomNavigationBarType.shifting;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class BottomNavigationBarTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomNavigationBarType');
+        return const HTType('BottomNavigationBarType');
       case 'index':
         return (instance as BottomNavigationBarType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BottomNavigationBarType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BottomNavigationBarType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,27 +47,57 @@ class BottomNavigationBarAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             items: List<BottomNavigationBarItem>.from(namedArgs['items']),
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            currentIndex: namedArgs.containsKey('currentIndex') ? namedArgs['currentIndex'] : 0,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            currentIndex: namedArgs.containsKey('currentIndex')
+                ? namedArgs['currentIndex']
+                : 0,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             type: namedArgs.containsKey('type') ? namedArgs['type'] : null,
-            fixedColor: namedArgs.containsKey('fixedColor') ? namedArgs['fixedColor'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            iconSize: namedArgs.containsKey('iconSize') ? namedArgs['iconSize'] : 24.0,
-            selectedItemColor: namedArgs.containsKey('selectedItemColor') ? namedArgs['selectedItemColor'] : null,
-            unselectedItemColor: namedArgs.containsKey('unselectedItemColor') ? namedArgs['unselectedItemColor'] : null,
-            selectedIconTheme: namedArgs.containsKey('selectedIconTheme') ? namedArgs['selectedIconTheme'] : null,
-            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme') ? namedArgs['unselectedIconTheme'] : null,
-            selectedFontSize: namedArgs.containsKey('selectedFontSize') ? namedArgs['selectedFontSize'] : 14.0,
-            unselectedFontSize: namedArgs.containsKey('unselectedFontSize') ? namedArgs['unselectedFontSize'] : 12.0,
-            selectedLabelStyle: namedArgs.containsKey('selectedLabelStyle') ? namedArgs['selectedLabelStyle'] : null,
-            unselectedLabelStyle:
-                namedArgs.containsKey('unselectedLabelStyle') ? namedArgs['unselectedLabelStyle'] : null,
-            showSelectedLabels: namedArgs.containsKey('showSelectedLabels') ? namedArgs['showSelectedLabels'] : null,
-            showUnselectedLabels:
-                namedArgs.containsKey('showUnselectedLabels') ? namedArgs['showUnselectedLabels'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null);
+            fixedColor: namedArgs.containsKey('fixedColor')
+                ? namedArgs['fixedColor']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            iconSize: namedArgs.containsKey('iconSize')
+                ? namedArgs['iconSize']
+                : 24.0,
+            selectedItemColor: namedArgs.containsKey('selectedItemColor')
+                ? namedArgs['selectedItemColor']
+                : null,
+            unselectedItemColor: namedArgs.containsKey('unselectedItemColor')
+                ? namedArgs['unselectedItemColor']
+                : null,
+            selectedIconTheme: namedArgs.containsKey('selectedIconTheme')
+                ? namedArgs['selectedIconTheme']
+                : null,
+            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme')
+                ? namedArgs['unselectedIconTheme']
+                : null,
+            selectedFontSize: namedArgs.containsKey('selectedFontSize')
+                ? namedArgs['selectedFontSize']
+                : 14.0,
+            unselectedFontSize: namedArgs.containsKey('unselectedFontSize')
+                ? namedArgs['unselectedFontSize']
+                : 12.0,
+            selectedLabelStyle: namedArgs.containsKey('selectedLabelStyle')
+                ? namedArgs['selectedLabelStyle']
+                : null,
+            unselectedLabelStyle: namedArgs.containsKey('unselectedLabelStyle')
+                ? namedArgs['unselectedLabelStyle']
+                : null,
+            showSelectedLabels: namedArgs.containsKey('showSelectedLabels')
+                ? namedArgs['showSelectedLabels']
+                : null,
+            showUnselectedLabels: namedArgs.containsKey('showUnselectedLabels')
+                ? namedArgs['showUnselectedLabels']
+                : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,7 +111,7 @@ extension BottomNavigationBarBinding on BottomNavigationBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomNavigationBar');
+        return const HTType('BottomNavigationBar');
       case 'items':
         return items;
       case 'onTap':
@@ -130,25 +161,37 @@ extension BottomNavigationBarBinding on BottomNavigationBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/bottom_navigation_bar_theme.g.dart b/lib/bindings/flutter/material/bottom_navigation_bar_theme.g.dart
index 0d28639..82af40f 100644
--- a/lib/bindings/flutter/material/bottom_navigation_bar_theme.g.dart
+++ b/lib/bindings/flutter/material/bottom_navigation_bar_theme.g.dart
@@ -4,31 +4,56 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 
 class BottomNavigationBarThemeDataAutoBinding extends HTExternalClass {
-  BottomNavigationBarThemeDataAutoBinding() : super('BottomNavigationBarThemeData');
+  BottomNavigationBarThemeDataAutoBinding()
+      : super('BottomNavigationBarThemeData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BottomNavigationBarThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => BottomNavigationBarThemeData(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            selectedIconTheme: namedArgs.containsKey('selectedIconTheme') ? namedArgs['selectedIconTheme'] : null,
-            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme') ? namedArgs['unselectedIconTheme'] : null,
-            selectedItemColor: namedArgs.containsKey('selectedItemColor') ? namedArgs['selectedItemColor'] : null,
-            unselectedItemColor: namedArgs.containsKey('unselectedItemColor') ? namedArgs['unselectedItemColor'] : null,
-            selectedLabelStyle: namedArgs.containsKey('selectedLabelStyle') ? namedArgs['selectedLabelStyle'] : null,
-            unselectedLabelStyle:
-                namedArgs.containsKey('unselectedLabelStyle') ? namedArgs['unselectedLabelStyle'] : null,
-            showSelectedLabels: namedArgs.containsKey('showSelectedLabels') ? namedArgs['showSelectedLabels'] : null,
-            showUnselectedLabels:
-                namedArgs.containsKey('showUnselectedLabels') ? namedArgs['showUnselectedLabels'] : null,
-            type: namedArgs.containsKey('type') ? namedArgs['type'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BottomNavigationBarThemeData(
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                elevation: namedArgs.containsKey('elevation')
+                    ? namedArgs['elevation']
+                    : null,
+                selectedIconTheme: namedArgs.containsKey('selectedIconTheme')
+                    ? namedArgs['selectedIconTheme']
+                    : null,
+                unselectedIconTheme:
+                    namedArgs.containsKey('unselectedIconTheme')
+                        ? namedArgs['unselectedIconTheme']
+                        : null,
+                selectedItemColor: namedArgs.containsKey('selectedItemColor')
+                    ? namedArgs['selectedItemColor']
+                    : null,
+                unselectedItemColor:
+                    namedArgs.containsKey('unselectedItemColor')
+                        ? namedArgs['unselectedItemColor']
+                        : null,
+                selectedLabelStyle: namedArgs.containsKey('selectedLabelStyle')
+                    ? namedArgs['selectedLabelStyle']
+                    : null,
+                unselectedLabelStyle:
+                    namedArgs.containsKey('unselectedLabelStyle')
+                        ? namedArgs['unselectedLabelStyle']
+                        : null,
+                showSelectedLabels: namedArgs.containsKey('showSelectedLabels')
+                    ? namedArgs['showSelectedLabels']
+                    : null,
+                showUnselectedLabels:
+                    namedArgs.containsKey('showUnselectedLabels')
+                        ? namedArgs['showUnselectedLabels']
+                        : null,
+                type: namedArgs.containsKey('type') ? namedArgs['type'] : null);
       case 'BottomNavigationBarThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BottomNavigationBarThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            BottomNavigationBarThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -42,7 +67,7 @@ extension BottomNavigationBarThemeDataBinding on BottomNavigationBarThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomNavigationBarThemeData');
+        return const HTType('BottomNavigationBarThemeData');
       case 'backgroundColor':
         return backgroundColor;
       case 'elevation':
@@ -69,32 +94,53 @@ extension BottomNavigationBarThemeDataBinding on BottomNavigationBarThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            selectedIconTheme: namedArgs.containsKey('selectedIconTheme') ? namedArgs['selectedIconTheme'] : null,
-            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme') ? namedArgs['unselectedIconTheme'] : null,
-            selectedItemColor: namedArgs.containsKey('selectedItemColor') ? namedArgs['selectedItemColor'] : null,
-            unselectedItemColor: namedArgs.containsKey('unselectedItemColor') ? namedArgs['unselectedItemColor'] : null,
-            selectedLabelStyle: namedArgs.containsKey('selectedLabelStyle') ? namedArgs['selectedLabelStyle'] : null,
-            unselectedLabelStyle:
-                namedArgs.containsKey('unselectedLabelStyle') ? namedArgs['unselectedLabelStyle'] : null,
-            showSelectedLabels: namedArgs.containsKey('showSelectedLabels') ? namedArgs['showSelectedLabels'] : null,
-            showUnselectedLabels:
-                namedArgs.containsKey('showUnselectedLabels') ? namedArgs['showUnselectedLabels'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            selectedIconTheme: namedArgs.containsKey('selectedIconTheme')
+                ? namedArgs['selectedIconTheme']
+                : null,
+            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme')
+                ? namedArgs['unselectedIconTheme']
+                : null,
+            selectedItemColor: namedArgs.containsKey('selectedItemColor')
+                ? namedArgs['selectedItemColor']
+                : null,
+            unselectedItemColor: namedArgs.containsKey('unselectedItemColor')
+                ? namedArgs['unselectedItemColor']
+                : null,
+            selectedLabelStyle: namedArgs.containsKey('selectedLabelStyle')
+                ? namedArgs['selectedLabelStyle']
+                : null,
+            unselectedLabelStyle: namedArgs.containsKey('unselectedLabelStyle')
+                ? namedArgs['unselectedLabelStyle']
+                : null,
+            showSelectedLabels: namedArgs.containsKey('showSelectedLabels')
+                ? namedArgs['showSelectedLabels']
+                : null,
+            showUnselectedLabels: namedArgs.containsKey('showUnselectedLabels')
+                ? namedArgs['showUnselectedLabels']
+                : null,
             type: namedArgs.containsKey('type') ? namedArgs['type'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -106,14 +152,16 @@ class BottomNavigationBarThemeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BottomNavigationBarTheme':
-        return ({positionalArgs, namedArgs, typeArgs}) => BottomNavigationBarTheme(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            data: namedArgs['data'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BottomNavigationBarTheme(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                data: namedArgs['data'],
+                child: namedArgs['child']);
       case 'BottomNavigationBarTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => BottomNavigationBarTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BottomNavigationBarTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -127,7 +175,7 @@ extension BottomNavigationBarThemeBinding on BottomNavigationBarTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomNavigationBarTheme');
+        return const HTType('BottomNavigationBarTheme');
       case 'data':
         return data;
       case 'child':
@@ -137,31 +185,44 @@ extension BottomNavigationBarThemeBinding on BottomNavigationBarTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/bottom_sheet.g.dart b/lib/bindings/flutter/material/bottom_sheet.g.dart
index 1af1017..1e7cfdc 100644
--- a/lib/bindings/flutter/material/bottom_sheet.g.dart
+++ b/lib/bindings/flutter/material/bottom_sheet.g.dart
@@ -12,20 +12,35 @@ class BottomSheetAutoBinding extends HTExternalClass {
       case 'BottomSheet':
         return ({positionalArgs, namedArgs, typeArgs}) => BottomSheet(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            animationController: namedArgs.containsKey('animationController') ? namedArgs['animationController'] : null,
-            enableDrag: namedArgs.containsKey('enableDrag') ? namedArgs['enableDrag'] : true,
-            onDragStart: namedArgs.containsKey('onDragStart') ? namedArgs['onDragStart'] : null,
-            onDragEnd: namedArgs.containsKey('onDragEnd') ? namedArgs['onDragEnd'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            animationController: namedArgs.containsKey('animationController')
+                ? namedArgs['animationController']
+                : null,
+            enableDrag: namedArgs.containsKey('enableDrag')
+                ? namedArgs['enableDrag']
+                : true,
+            onDragStart: namedArgs.containsKey('onDragStart')
+                ? namedArgs['onDragStart']
+                : null,
+            onDragEnd: namedArgs.containsKey('onDragEnd')
+                ? namedArgs['onDragEnd']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
             onClosing: namedArgs['onClosing'],
             builder: namedArgs['builder']);
       case 'BottomSheet.createAnimationController':
-        return ({positionalArgs, namedArgs, typeArgs}) => BottomSheet.createAnimationController(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BottomSheet.createAnimationController(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,13 +51,15 @@ class BottomSheetAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'BottomSheetDragStartHandler': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'BottomSheetDragStartHandler': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
       'BottomSheetDragEndHandler': (HTFunction function) =>
-          (details, {isClosing}) => function.call(positionalArgs: [details], namedArgs: {'isClosing': isClosing}),
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'WidgetBuilder': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as Widget,
+          (details, {isClosing}) => function.call(
+              positionalArgs: [details], namedArgs: {'isClosing': isClosing}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'WidgetBuilder': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as Widget,
     };
   }
 }
@@ -51,7 +68,7 @@ extension BottomSheetBinding on BottomSheet {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomSheet');
+        return const HTType('BottomSheet');
       case 'animationController':
         return animationController;
       case 'onClosing':
@@ -83,25 +100,37 @@ extension BottomSheetBinding on BottomSheet {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/bottom_sheet_theme.g.dart b/lib/bindings/flutter/material/bottom_sheet_theme.g.dart
index 4daf397..53df4fe 100644
--- a/lib/bindings/flutter/material/bottom_sheet_theme.g.dart
+++ b/lib/bindings/flutter/material/bottom_sheet_theme.g.dart
@@ -11,18 +11,28 @@ class BottomSheetThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'BottomSheetThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => BottomSheetThemeData(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            modalBackgroundColor:
-                namedArgs.containsKey('modalBackgroundColor') ? namedArgs['modalBackgroundColor'] : null,
-            modalElevation: namedArgs.containsKey('modalElevation') ? namedArgs['modalElevation'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            modalBackgroundColor: namedArgs.containsKey('modalBackgroundColor')
+                ? namedArgs['modalBackgroundColor']
+                : null,
+            modalElevation: namedArgs.containsKey('modalElevation')
+                ? namedArgs['modalElevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null);
       case 'BottomSheetThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BottomSheetThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            BottomSheetThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,7 +46,7 @@ extension BottomSheetThemeDataBinding on BottomSheetThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomSheetThemeData');
+        return const HTType('BottomSheetThemeData');
       case 'backgroundColor':
         return backgroundColor;
       case 'elevation':
@@ -53,26 +63,38 @@ extension BottomSheetThemeDataBinding on BottomSheetThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            modalBackgroundColor:
-                namedArgs.containsKey('modalBackgroundColor') ? namedArgs['modalBackgroundColor'] : null,
-            modalElevation: namedArgs.containsKey('modalElevation') ? namedArgs['modalElevation'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            modalBackgroundColor: namedArgs.containsKey('modalBackgroundColor')
+                ? namedArgs['modalBackgroundColor']
+                : null,
+            modalElevation: namedArgs.containsKey('modalElevation')
+                ? namedArgs['modalElevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/button.g.dart b/lib/bindings/flutter/material/button.g.dart
index bd579e6..4ff3e20 100644
--- a/lib/bindings/flutter/material/button.g.dart
+++ b/lib/bindings/flutter/material/button.g.dart
@@ -14,37 +14,82 @@ class RawMaterialButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RawMaterialButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onHighlightChanged: namedArgs.containsKey('onHighlightChanged') ? namedArgs['onHighlightChanged'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 2.0,
-            focusElevation: namedArgs.containsKey('focusElevation') ? namedArgs['focusElevation'] : 4.0,
-            hoverElevation: namedArgs.containsKey('hoverElevation') ? namedArgs['hoverElevation'] : 4.0,
-            highlightElevation: namedArgs.containsKey('highlightElevation') ? namedArgs['highlightElevation'] : 8.0,
-            disabledElevation: namedArgs.containsKey('disabledElevation') ? namedArgs['disabledElevation'] : 0.0,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : EdgeInsets.zero,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : VisualDensity.standard,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            onHighlightChanged: namedArgs.containsKey('onHighlightChanged')
+                ? namedArgs['onHighlightChanged']
+                : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 2.0,
+            focusElevation: namedArgs.containsKey('focusElevation')
+                ? namedArgs['focusElevation']
+                : 4.0,
+            hoverElevation: namedArgs.containsKey('hoverElevation')
+                ? namedArgs['hoverElevation']
+                : 4.0,
+            highlightElevation: namedArgs.containsKey('highlightElevation')
+                ? namedArgs['highlightElevation']
+                : 8.0,
+            disabledElevation: namedArgs.containsKey('disabledElevation')
+                ? namedArgs['disabledElevation']
+                : 0.0,
+            padding: namedArgs.containsKey('padding')
+                ? namedArgs['padding']
+                : EdgeInsets.zero,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : VisualDensity.standard,
             constraints: namedArgs.containsKey('constraints')
                 ? namedArgs['constraints']
                 : const BoxConstraints(minWidth: 88.0, minHeight: 36.0),
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : const RoundedRectangleBorder(),
-            animationDuration:
-                namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : kThemeChangeDuration,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
+            shape: namedArgs.containsKey('shape')
+                ? namedArgs['shape']
+                : const RoundedRectangleBorder(),
+            animationDuration: namedArgs.containsKey('animationDuration')
+                ? namedArgs['animationDuration']
+                : kThemeChangeDuration,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : true);
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -55,7 +100,8 @@ class RawMaterialButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -64,7 +110,7 @@ extension RawMaterialButtonBinding on RawMaterialButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawMaterialButton');
+        return const HTType('RawMaterialButton');
       case 'onPressed':
         return onPressed;
       case 'onLongPress':
@@ -130,25 +176,37 @@ extension RawMaterialButtonBinding on RawMaterialButton {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/button_bar.g.dart b/lib/bindings/flutter/material/button_bar.g.dart
index dc90bd0..40274c6 100644
--- a/lib/bindings/flutter/material/button_bar.g.dart
+++ b/lib/bindings/flutter/material/button_bar.g.dart
@@ -12,21 +12,43 @@ class ButtonBarAutoBinding extends HTExternalClass {
       case 'ButtonBar':
         return ({positionalArgs, namedArgs, typeArgs}) => ButtonBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null,
-            mainAxisSize: namedArgs.containsKey('mainAxisSize') ? namedArgs['mainAxisSize'] : null,
-            buttonTextTheme: namedArgs.containsKey('buttonTextTheme') ? namedArgs['buttonTextTheme'] : null,
-            buttonMinWidth: namedArgs.containsKey('buttonMinWidth') ? namedArgs['buttonMinWidth'] : null,
-            buttonHeight: namedArgs.containsKey('buttonHeight') ? namedArgs['buttonHeight'] : null,
-            buttonPadding: namedArgs.containsKey('buttonPadding') ? namedArgs['buttonPadding'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null,
+            mainAxisSize: namedArgs.containsKey('mainAxisSize')
+                ? namedArgs['mainAxisSize']
+                : null,
+            buttonTextTheme: namedArgs.containsKey('buttonTextTheme')
+                ? namedArgs['buttonTextTheme']
+                : null,
+            buttonMinWidth: namedArgs.containsKey('buttonMinWidth')
+                ? namedArgs['buttonMinWidth']
+                : null,
+            buttonHeight: namedArgs.containsKey('buttonHeight')
+                ? namedArgs['buttonHeight']
+                : null,
+            buttonPadding: namedArgs.containsKey('buttonPadding')
+                ? namedArgs['buttonPadding']
+                : null,
             buttonAlignedDropdown:
-                namedArgs.containsKey('buttonAlignedDropdown') ? namedArgs['buttonAlignedDropdown'] : null,
-            layoutBehavior: namedArgs.containsKey('layoutBehavior') ? namedArgs['layoutBehavior'] : null,
-            overflowDirection: namedArgs.containsKey('overflowDirection') ? namedArgs['overflowDirection'] : null,
+                namedArgs.containsKey('buttonAlignedDropdown')
+                    ? namedArgs['buttonAlignedDropdown']
+                    : null,
+            layoutBehavior: namedArgs.containsKey('layoutBehavior')
+                ? namedArgs['layoutBehavior']
+                : null,
+            overflowDirection: namedArgs.containsKey('overflowDirection')
+                ? namedArgs['overflowDirection']
+                : null,
             overflowButtonSpacing:
-                namedArgs.containsKey('overflowButtonSpacing') ? namedArgs['overflowButtonSpacing'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+                namedArgs.containsKey('overflowButtonSpacing')
+                    ? namedArgs['overflowButtonSpacing']
+                    : null,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -40,7 +62,7 @@ extension ButtonBarBinding on ButtonBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonBar');
+        return const HTType('ButtonBar');
       case 'alignment':
         return alignment;
       case 'mainAxisSize':
@@ -68,31 +90,44 @@ extension ButtonBarBinding on ButtonBar {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/button_bar_theme.g.dart b/lib/bindings/flutter/material/button_bar_theme.g.dart
index d97d499..7e00636 100644
--- a/lib/bindings/flutter/material/button_bar_theme.g.dart
+++ b/lib/bindings/flutter/material/button_bar_theme.g.dart
@@ -11,21 +11,40 @@ class ButtonBarThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ButtonBarThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => ButtonBarThemeData(
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null,
-            mainAxisSize: namedArgs.containsKey('mainAxisSize') ? namedArgs['mainAxisSize'] : null,
-            buttonTextTheme: namedArgs.containsKey('buttonTextTheme') ? namedArgs['buttonTextTheme'] : null,
-            buttonMinWidth: namedArgs.containsKey('buttonMinWidth') ? namedArgs['buttonMinWidth'] : null,
-            buttonHeight: namedArgs.containsKey('buttonHeight') ? namedArgs['buttonHeight'] : null,
-            buttonPadding: namedArgs.containsKey('buttonPadding') ? namedArgs['buttonPadding'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null,
+            mainAxisSize: namedArgs.containsKey('mainAxisSize')
+                ? namedArgs['mainAxisSize']
+                : null,
+            buttonTextTheme: namedArgs.containsKey('buttonTextTheme')
+                ? namedArgs['buttonTextTheme']
+                : null,
+            buttonMinWidth: namedArgs.containsKey('buttonMinWidth')
+                ? namedArgs['buttonMinWidth']
+                : null,
+            buttonHeight: namedArgs.containsKey('buttonHeight')
+                ? namedArgs['buttonHeight']
+                : null,
+            buttonPadding: namedArgs.containsKey('buttonPadding')
+                ? namedArgs['buttonPadding']
+                : null,
             buttonAlignedDropdown:
-                namedArgs.containsKey('buttonAlignedDropdown') ? namedArgs['buttonAlignedDropdown'] : null,
-            layoutBehavior: namedArgs.containsKey('layoutBehavior') ? namedArgs['layoutBehavior'] : null,
-            overflowDirection: namedArgs.containsKey('overflowDirection') ? namedArgs['overflowDirection'] : null);
+                namedArgs.containsKey('buttonAlignedDropdown')
+                    ? namedArgs['buttonAlignedDropdown']
+                    : null,
+            layoutBehavior: namedArgs.containsKey('layoutBehavior')
+                ? namedArgs['layoutBehavior']
+                : null,
+            overflowDirection: namedArgs.containsKey('overflowDirection')
+                ? namedArgs['overflowDirection']
+                : null);
       case 'ButtonBarThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ButtonBarThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ButtonBarThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -39,7 +58,7 @@ extension ButtonBarThemeDataBinding on ButtonBarThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonBarThemeData');
+        return const HTType('ButtonBarThemeData');
       case 'alignment':
         return alignment;
       case 'mainAxisSize':
@@ -62,29 +81,50 @@ extension ButtonBarThemeDataBinding on ButtonBarThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null,
-            mainAxisSize: namedArgs.containsKey('mainAxisSize') ? namedArgs['mainAxisSize'] : null,
-            buttonTextTheme: namedArgs.containsKey('buttonTextTheme') ? namedArgs['buttonTextTheme'] : null,
-            buttonMinWidth: namedArgs.containsKey('buttonMinWidth') ? namedArgs['buttonMinWidth'] : null,
-            buttonHeight: namedArgs.containsKey('buttonHeight') ? namedArgs['buttonHeight'] : null,
-            buttonPadding: namedArgs.containsKey('buttonPadding') ? namedArgs['buttonPadding'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null,
+            mainAxisSize: namedArgs.containsKey('mainAxisSize')
+                ? namedArgs['mainAxisSize']
+                : null,
+            buttonTextTheme: namedArgs.containsKey('buttonTextTheme')
+                ? namedArgs['buttonTextTheme']
+                : null,
+            buttonMinWidth: namedArgs.containsKey('buttonMinWidth')
+                ? namedArgs['buttonMinWidth']
+                : null,
+            buttonHeight: namedArgs.containsKey('buttonHeight')
+                ? namedArgs['buttonHeight']
+                : null,
+            buttonPadding: namedArgs.containsKey('buttonPadding')
+                ? namedArgs['buttonPadding']
+                : null,
             buttonAlignedDropdown:
-                namedArgs.containsKey('buttonAlignedDropdown') ? namedArgs['buttonAlignedDropdown'] : null,
-            layoutBehavior: namedArgs.containsKey('layoutBehavior') ? namedArgs['layoutBehavior'] : null,
-            overflowDirection: namedArgs.containsKey('overflowDirection') ? namedArgs['overflowDirection'] : null);
+                namedArgs.containsKey('buttonAlignedDropdown')
+                    ? namedArgs['buttonAlignedDropdown']
+                    : null,
+            layoutBehavior: namedArgs.containsKey('layoutBehavior')
+                ? namedArgs['layoutBehavior']
+                : null,
+            overflowDirection: namedArgs.containsKey('overflowDirection')
+                ? namedArgs['overflowDirection']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -101,9 +141,10 @@ class ButtonBarThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'ButtonBarTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ButtonBarTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ButtonBarTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -117,7 +158,7 @@ extension ButtonBarThemeBinding on ButtonBarTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonBarTheme');
+        return const HTType('ButtonBarTheme');
       case 'data':
         return data;
       case 'child':
@@ -127,31 +168,44 @@ extension ButtonBarThemeBinding on ButtonBarTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/button_style.g.dart b/lib/bindings/flutter/material/button_style.g.dart
index 867bf2a..769c6e8 100644
--- a/lib/bindings/flutter/material/button_style.g.dart
+++ b/lib/bindings/flutter/material/button_style.g.dart
@@ -12,27 +12,54 @@ class ButtonStyleAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ButtonStyle':
         return ({positionalArgs, namedArgs, typeArgs}) => ButtonStyle(
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            minimumSize: namedArgs.containsKey('minimumSize') ? namedArgs['minimumSize'] : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            minimumSize: namedArgs.containsKey('minimumSize')
+                ? namedArgs['minimumSize']
+                : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            tapTargetSize: namedArgs.containsKey('tapTargetSize') ? namedArgs['tapTargetSize'] : null,
-            animationDuration: namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null);
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            tapTargetSize: namedArgs.containsKey('tapTargetSize')
+                ? namedArgs['tapTargetSize']
+                : null,
+            animationDuration: namedArgs.containsKey('animationDuration')
+                ? namedArgs['animationDuration']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null);
       case 'ButtonStyle.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ButtonStyle.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => ButtonStyle.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -46,7 +73,7 @@ extension ButtonStyleBinding on ButtonStyle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonStyle');
+        return const HTType('ButtonStyle');
       case 'textStyle':
         return textStyle;
       case 'backgroundColor':
@@ -83,37 +110,68 @@ extension ButtonStyleBinding on ButtonStyle {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            minimumSize: namedArgs.containsKey('minimumSize') ? namedArgs['minimumSize'] : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            minimumSize: namedArgs.containsKey('minimumSize')
+                ? namedArgs['minimumSize']
+                : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            tapTargetSize: namedArgs.containsKey('tapTargetSize') ? namedArgs['tapTargetSize'] : null,
-            animationDuration: namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null);
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            tapTargetSize: namedArgs.containsKey('tapTargetSize')
+                ? namedArgs['tapTargetSize']
+                : null,
+            animationDuration: namedArgs.containsKey('animationDuration')
+                ? namedArgs['animationDuration']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null);
       case 'merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => merge(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            merge(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/button_theme.g.dart b/lib/bindings/flutter/material/button_theme.g.dart
index caa2954..5cd2f81 100644
--- a/lib/bindings/flutter/material/button_theme.g.dart
+++ b/lib/bindings/flutter/material/button_theme.g.dart
@@ -18,7 +18,7 @@ class ButtonTextThemeAutoBinding extends HTExternalClass {
       case 'ButtonTextTheme.primary':
         return ButtonTextTheme.primary;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class ButtonTextThemeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonTextTheme');
+        return const HTType('ButtonTextTheme');
       case 'index':
         return (instance as ButtonTextTheme).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ButtonTextTheme).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ButtonTextTheme).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,7 +51,7 @@ class ButtonBarLayoutBehaviorAutoBinding extends HTExternalClass {
       case 'ButtonBarLayoutBehavior.padded':
         return ButtonBarLayoutBehavior.padded;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -58,13 +59,14 @@ class ButtonBarLayoutBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonBarLayoutBehavior');
+        return const HTType('ButtonBarLayoutBehavior');
       case 'index':
         return (instance as ButtonBarLayoutBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ButtonBarLayoutBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ButtonBarLayoutBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -78,33 +80,60 @@ class ButtonThemeAutoBinding extends HTExternalClass {
       case 'ButtonTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => ButtonTheme(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : ButtonTextTheme.normal,
-            layoutBehavior:
-                namedArgs.containsKey('layoutBehavior') ? namedArgs['layoutBehavior'] : ButtonBarLayoutBehavior.padded,
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : 88.0,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : 36.0,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : ButtonTextTheme.normal,
+            layoutBehavior: namedArgs.containsKey('layoutBehavior')
+                ? namedArgs['layoutBehavior']
+                : ButtonBarLayoutBehavior.padded,
+            minWidth: namedArgs.containsKey('minWidth')
+                ? namedArgs['minWidth']
+                : 88.0,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : 36.0,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            alignedDropdown: namedArgs.containsKey('alignedDropdown') ? namedArgs['alignedDropdown'] : false,
-            buttonColor: namedArgs.containsKey('buttonColor') ? namedArgs['buttonColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            colorScheme: namedArgs.containsKey('colorScheme') ? namedArgs['colorScheme'] : null,
+            alignedDropdown: namedArgs.containsKey('alignedDropdown')
+                ? namedArgs['alignedDropdown']
+                : false,
+            buttonColor: namedArgs.containsKey('buttonColor')
+                ? namedArgs['buttonColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            colorScheme: namedArgs.containsKey('colorScheme')
+                ? namedArgs['colorScheme']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
             child: namedArgs['child']);
       case 'ButtonTheme.fromButtonThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => ButtonTheme.fromButtonThemeData(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            data: namedArgs['data'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ButtonTheme.fromButtonThemeData(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                data: namedArgs['data'],
+                child: namedArgs['child']);
       case 'ButtonTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ButtonTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ButtonTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -118,7 +147,7 @@ extension ButtonThemeBinding on ButtonTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonTheme');
+        return const HTType('ButtonTheme');
       case 'data':
         return data;
       case 'child':
@@ -128,33 +157,47 @@ extension ButtonThemeBinding on ButtonTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -167,25 +210,50 @@ class ButtonThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ButtonThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => ButtonThemeData(
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : ButtonTextTheme.normal,
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : 88.0,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : 36.0,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : ButtonTextTheme.normal,
+            minWidth: namedArgs.containsKey('minWidth')
+                ? namedArgs['minWidth']
+                : 88.0,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : 36.0,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            layoutBehavior:
-                namedArgs.containsKey('layoutBehavior') ? namedArgs['layoutBehavior'] : ButtonBarLayoutBehavior.padded,
-            alignedDropdown: namedArgs.containsKey('alignedDropdown') ? namedArgs['alignedDropdown'] : false,
-            buttonColor: namedArgs.containsKey('buttonColor') ? namedArgs['buttonColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            colorScheme: namedArgs.containsKey('colorScheme') ? namedArgs['colorScheme'] : null,
+            layoutBehavior: namedArgs.containsKey('layoutBehavior')
+                ? namedArgs['layoutBehavior']
+                : ButtonBarLayoutBehavior.padded,
+            alignedDropdown: namedArgs.containsKey('alignedDropdown')
+                ? namedArgs['alignedDropdown']
+                : false,
+            buttonColor: namedArgs.containsKey('buttonColor')
+                ? namedArgs['buttonColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            colorScheme: namedArgs.containsKey('colorScheme')
+                ? namedArgs['colorScheme']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -199,7 +267,7 @@ extension ButtonThemeDataBinding on ButtonThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonThemeData');
+        return const HTType('ButtonThemeData');
       case 'minWidth':
         return minWidth;
       case 'height':
@@ -221,76 +289,125 @@ extension ButtonThemeDataBinding on ButtonThemeData {
       case 'hashCode':
         return hashCode;
       case 'getBrightness':
-        return ({positionalArgs, namedArgs, typeArgs}) => getBrightness(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getBrightness(positionalArgs[0]);
       case 'getTextTheme':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTextTheme(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTextTheme(positionalArgs[0]);
       case 'getDisabledTextColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDisabledTextColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDisabledTextColor(positionalArgs[0]);
       case 'getDisabledFillColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDisabledFillColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDisabledFillColor(positionalArgs[0]);
       case 'getFillColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getFillColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getFillColor(positionalArgs[0]);
       case 'getTextColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTextColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTextColor(positionalArgs[0]);
       case 'getSplashColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getSplashColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getSplashColor(positionalArgs[0]);
       case 'getFocusColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getFocusColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getFocusColor(positionalArgs[0]);
       case 'getHoverColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHoverColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHoverColor(positionalArgs[0]);
       case 'getHighlightColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHighlightColor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHighlightColor(positionalArgs[0]);
       case 'getElevation':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElevation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElevation(positionalArgs[0]);
       case 'getFocusElevation':
-        return ({positionalArgs, namedArgs, typeArgs}) => getFocusElevation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getFocusElevation(positionalArgs[0]);
       case 'getHoverElevation':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHoverElevation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHoverElevation(positionalArgs[0]);
       case 'getHighlightElevation':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHighlightElevation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHighlightElevation(positionalArgs[0]);
       case 'getDisabledElevation':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDisabledElevation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDisabledElevation(positionalArgs[0]);
       case 'getPadding':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPadding(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPadding(positionalArgs[0]);
       case 'getShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => getShape(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getShape(positionalArgs[0]);
       case 'getAnimationDuration':
-        return ({positionalArgs, namedArgs, typeArgs}) => getAnimationDuration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getAnimationDuration(positionalArgs[0]);
       case 'getConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => getConstraints(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getConstraints(positionalArgs[0]);
       case 'getMaterialTapTargetSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaterialTapTargetSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaterialTapTargetSize(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            layoutBehavior: namedArgs.containsKey('layoutBehavior') ? namedArgs['layoutBehavior'] : null,
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            layoutBehavior: namedArgs.containsKey('layoutBehavior')
+                ? namedArgs['layoutBehavior']
+                : null,
+            minWidth: namedArgs.containsKey('minWidth')
+                ? namedArgs['minWidth']
+                : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            alignedDropdown: namedArgs.containsKey('alignedDropdown') ? namedArgs['alignedDropdown'] : null,
-            buttonColor: namedArgs.containsKey('buttonColor') ? namedArgs['buttonColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            colorScheme: namedArgs.containsKey('colorScheme') ? namedArgs['colorScheme'] : null,
+            alignedDropdown: namedArgs.containsKey('alignedDropdown')
+                ? namedArgs['alignedDropdown']
+                : null,
+            buttonColor: namedArgs.containsKey('buttonColor')
+                ? namedArgs['buttonColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            colorScheme: namedArgs.containsKey('colorScheme')
+                ? namedArgs['colorScheme']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/calendar_date_picker.g.dart b/lib/bindings/flutter/material/calendar_date_picker.g.dart
index 4abba36..3e44e13 100644
--- a/lib/bindings/flutter/material/calendar_date_picker.g.dart
+++ b/lib/bindings/flutter/material/calendar_date_picker.g.dart
@@ -17,16 +17,23 @@ class CalendarDatePickerAutoBinding extends HTExternalClass {
             initialDate: namedArgs['initialDate'],
             firstDate: namedArgs['firstDate'],
             lastDate: namedArgs['lastDate'],
-            currentDate: namedArgs.containsKey('currentDate') ? namedArgs['currentDate'] : null,
+            currentDate: namedArgs.containsKey('currentDate')
+                ? namedArgs['currentDate']
+                : null,
             onDateChanged: namedArgs['onDateChanged'],
             onDisplayedMonthChanged:
-                namedArgs.containsKey('onDisplayedMonthChanged') ? namedArgs['onDisplayedMonthChanged'] : null,
-            initialCalendarMode:
-                namedArgs.containsKey('initialCalendarMode') ? namedArgs['initialCalendarMode'] : DatePickerMode.day,
+                namedArgs.containsKey('onDisplayedMonthChanged')
+                    ? namedArgs['onDisplayedMonthChanged']
+                    : null,
+            initialCalendarMode: namedArgs.containsKey('initialCalendarMode')
+                ? namedArgs['initialCalendarMode']
+                : DatePickerMode.day,
             selectableDayPredicate:
-                namedArgs.containsKey('selectableDayPredicate') ? namedArgs['selectableDayPredicate'] : null);
+                namedArgs.containsKey('selectableDayPredicate')
+                    ? namedArgs['selectableDayPredicate']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,8 +44,8 @@ class CalendarDatePickerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SelectableDayPredicate': (HTFunction function) =>
-          (day) => function.call(positionalArgs: [day], namedArgs: const {}) as bool,
+      'SelectableDayPredicate': (HTFunction function) => (day) =>
+          function.call(positionalArgs: [day], namedArgs: const {}) as bool,
     };
   }
 }
@@ -47,7 +54,7 @@ extension CalendarDatePickerBinding on CalendarDatePicker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CalendarDatePicker');
+        return const HTType('CalendarDatePicker');
       case 'initialDate':
         return initialDate;
       case 'firstDate':
@@ -75,25 +82,37 @@ extension CalendarDatePickerBinding on CalendarDatePicker {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -107,16 +126,21 @@ class YearPickerAutoBinding extends HTExternalClass {
       case 'YearPicker':
         return ({positionalArgs, namedArgs, typeArgs}) => YearPicker(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            currentDate: namedArgs.containsKey('currentDate') ? namedArgs['currentDate'] : null,
+            currentDate: namedArgs.containsKey('currentDate')
+                ? namedArgs['currentDate']
+                : null,
             firstDate: namedArgs['firstDate'],
             lastDate: namedArgs['lastDate'],
-            initialDate: namedArgs.containsKey('initialDate') ? namedArgs['initialDate'] : null,
+            initialDate: namedArgs.containsKey('initialDate')
+                ? namedArgs['initialDate']
+                : null,
             selectedDate: namedArgs['selectedDate'],
             onChanged: namedArgs['onChanged'],
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start);
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -130,7 +154,7 @@ extension YearPickerBinding on YearPicker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('YearPicker');
+        return const HTType('YearPicker');
       case 'currentDate':
         return currentDate;
       case 'firstDate':
@@ -156,25 +180,37 @@ extension YearPickerBinding on YearPicker {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/card.g.dart b/lib/bindings/flutter/material/card.g.dart
index 64bb658..e75cb71 100644
--- a/lib/bindings/flutter/material/card.g.dart
+++ b/lib/bindings/flutter/material/card.g.dart
@@ -12,16 +12,27 @@ class CardAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Card(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            borderOnForeground: namedArgs.containsKey('borderOnForeground') ? namedArgs['borderOnForeground'] : true,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
+            borderOnForeground: namedArgs.containsKey('borderOnForeground')
+                ? namedArgs['borderOnForeground']
+                : true,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            semanticContainer: namedArgs.containsKey('semanticContainer') ? namedArgs['semanticContainer'] : true);
+            semanticContainer: namedArgs.containsKey('semanticContainer')
+                ? namedArgs['semanticContainer']
+                : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +46,7 @@ extension CardBinding on Card {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Card');
+        return const HTType('Card');
       case 'color':
         return color;
       case 'shadowColor':
@@ -59,31 +70,44 @@ extension CardBinding on Card {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/card_theme.g.dart b/lib/bindings/flutter/material/card_theme.g.dart
index b939b71..3544aa2 100644
--- a/lib/bindings/flutter/material/card_theme.g.dart
+++ b/lib/bindings/flutter/material/card_theme.g.dart
@@ -11,19 +11,27 @@ class CardThemeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'CardTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => CardTheme(
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
       case 'CardTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => CardTheme.of(positionalArgs[0]);
-      case 'CardTheme.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            CardTheme.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            CardTheme.of(positionalArgs[0]);
+      case 'CardTheme.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => CardTheme.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,7 +45,7 @@ extension CardThemeBinding on CardTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CardTheme');
+        return const HTType('CardTheme');
       case 'clipBehavior':
         return clipBehavior;
       case 'color':
@@ -54,25 +62,35 @@ extension CardThemeBinding on CardTheme {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/checkbox.g.dart b/lib/bindings/flutter/material/checkbox.g.dart
index edc3926..4e50eb8 100644
--- a/lib/bindings/flutter/material/checkbox.g.dart
+++ b/lib/bindings/flutter/material/checkbox.g.dart
@@ -14,25 +14,51 @@ class CheckboxAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Checkbox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
-            tristate: namedArgs.containsKey('tristate') ? namedArgs['tristate'] : false,
+            tristate: namedArgs.containsKey('tristate')
+                ? namedArgs['tristate']
+                : false,
             onChanged: namedArgs['onChanged'],
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            checkColor: namedArgs.containsKey('checkColor') ? namedArgs['checkColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            checkColor: namedArgs.containsKey('checkColor')
+                ? namedArgs['checkColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false);
       case 'Checkbox.width':
         return Checkbox.width;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -46,7 +72,7 @@ extension CheckboxBinding on Checkbox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Checkbox');
+        return const HTType('Checkbox');
       case 'value':
         return value;
       case 'onChanged':
@@ -88,25 +114,37 @@ extension CheckboxBinding on Checkbox {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/checkbox_list_tile.g.dart b/lib/bindings/flutter/material/checkbox_list_tile.g.dart
index 9689695..d4f06ee 100644
--- a/lib/bindings/flutter/material/checkbox_list_tile.g.dart
+++ b/lib/bindings/flutter/material/checkbox_list_tile.g.dart
@@ -13,25 +13,47 @@ class CheckboxListTileAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            checkColor: namedArgs.containsKey('checkColor') ? namedArgs['checkColor'] : null,
-            tileColor: namedArgs.containsKey('tileColor') ? namedArgs['tileColor'] : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            checkColor: namedArgs.containsKey('checkColor')
+                ? namedArgs['checkColor']
+                : null,
+            tileColor: namedArgs.containsKey('tileColor')
+                ? namedArgs['tileColor']
+                : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            subtitle: namedArgs.containsKey('subtitle') ? namedArgs['subtitle'] : null,
-            isThreeLine: namedArgs.containsKey('isThreeLine') ? namedArgs['isThreeLine'] : false,
+            subtitle: namedArgs.containsKey('subtitle')
+                ? namedArgs['subtitle']
+                : null,
+            isThreeLine: namedArgs.containsKey('isThreeLine')
+                ? namedArgs['isThreeLine']
+                : false,
             dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
+            secondary: namedArgs.containsKey('secondary')
+                ? namedArgs['secondary']
+                : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
             controlAffinity: namedArgs.containsKey('controlAffinity')
                 ? namedArgs['controlAffinity']
                 : ListTileControlAffinity.platform,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            tristate: namedArgs.containsKey('tristate') ? namedArgs['tristate'] : false,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            tristate: namedArgs.containsKey('tristate')
+                ? namedArgs['tristate']
+                : false,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            selectedTileColor: namedArgs.containsKey('selectedTileColor') ? namedArgs['selectedTileColor'] : null);
+            selectedTileColor: namedArgs.containsKey('selectedTileColor')
+                ? namedArgs['selectedTileColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,7 +67,7 @@ extension CheckboxListTileBinding on CheckboxListTile {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CheckboxListTile');
+        return const HTType('CheckboxListTile');
       case 'value':
         return value;
       case 'onChanged':
@@ -85,31 +107,44 @@ extension CheckboxListTileBinding on CheckboxListTile {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/checkbox_theme.g.dart b/lib/bindings/flutter/material/checkbox_theme.g.dart
index fcc156b..8a40a7c 100644
--- a/lib/bindings/flutter/material/checkbox_theme.g.dart
+++ b/lib/bindings/flutter/material/checkbox_theme.g.dart
@@ -12,19 +12,34 @@ class CheckboxThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'CheckboxThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => CheckboxThemeData(
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            checkColor: namedArgs.containsKey('checkColor') ? namedArgs['checkColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            checkColor: namedArgs.containsKey('checkColor')
+                ? namedArgs['checkColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null);
       case 'CheckboxThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            CheckboxThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            CheckboxThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -38,7 +53,7 @@ extension CheckboxThemeDataBinding on CheckboxThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CheckboxThemeData');
+        return const HTType('CheckboxThemeData');
       case 'mouseCursor':
         return mouseCursor;
       case 'fillColor':
@@ -57,27 +72,44 @@ extension CheckboxThemeDataBinding on CheckboxThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            checkColor: namedArgs.containsKey('checkColor') ? namedArgs['checkColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            checkColor: namedArgs.containsKey('checkColor')
+                ? namedArgs['checkColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -94,9 +126,10 @@ class CheckboxThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'CheckboxTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => CheckboxTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CheckboxTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,7 +143,7 @@ extension CheckboxThemeBinding on CheckboxTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CheckboxTheme');
+        return const HTType('CheckboxTheme');
       case 'data':
         return data;
       case 'child':
@@ -120,31 +153,44 @@ extension CheckboxThemeBinding on CheckboxTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/chip.g.dart b/lib/bindings/flutter/material/chip.g.dart
index ce1c991..01dbc88 100644
--- a/lib/bindings/flutter/material/chip.g.dart
+++ b/lib/bindings/flutter/material/chip.g.dart
@@ -13,31 +13,63 @@ class ChipAutoBinding extends HTExternalClass {
       case 'Chip':
         return ({positionalArgs, namedArgs, typeArgs}) => Chip(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            avatar: namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
+            avatar:
+                namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
             label: namedArgs['label'],
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            deleteIcon: namedArgs.containsKey('deleteIcon') ? namedArgs['deleteIcon'] : null,
-            onDeleted: namedArgs.containsKey('onDeleted') ? namedArgs['onDeleted'] : null,
-            deleteIconColor: namedArgs.containsKey('deleteIconColor') ? namedArgs['deleteIconColor'] : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            deleteIcon: namedArgs.containsKey('deleteIcon')
+                ? namedArgs['deleteIcon']
+                : null,
+            onDeleted: namedArgs.containsKey('onDeleted')
+                ? namedArgs['onDeleted']
+                : null,
+            deleteIconColor: namedArgs.containsKey('deleteIconColor')
+                ? namedArgs['deleteIconColor']
+                : null,
             useDeleteButtonTooltip:
-                namedArgs.containsKey('useDeleteButtonTooltip') ? namedArgs['useDeleteButtonTooltip'] : true,
+                namedArgs.containsKey('useDeleteButtonTooltip')
+                    ? namedArgs['useDeleteButtonTooltip']
+                    : true,
             deleteButtonTooltipMessage:
-                namedArgs.containsKey('deleteButtonTooltipMessage') ? namedArgs['deleteButtonTooltipMessage'] : null,
+                namedArgs.containsKey('deleteButtonTooltipMessage')
+                    ? namedArgs['deleteButtonTooltipMessage']
+                    : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -48,7 +80,8 @@ class ChipAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -57,7 +90,7 @@ extension ChipBinding on Chip {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Chip');
+        return const HTType('Chip');
       case 'avatar':
         return avatar;
       case 'label':
@@ -103,31 +136,44 @@ extension ChipBinding on Chip {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -141,35 +187,73 @@ class InputChipAutoBinding extends HTExternalClass {
       case 'InputChip':
         return ({positionalArgs, namedArgs, typeArgs}) => InputChip(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            avatar: namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
+            avatar:
+                namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
             label: namedArgs['label'],
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : true,
-            onSelected: namedArgs.containsKey('onSelected') ? namedArgs['onSelected'] : null,
-            deleteIcon: namedArgs.containsKey('deleteIcon') ? namedArgs['deleteIcon'] : null,
-            onDeleted: namedArgs.containsKey('onDeleted') ? namedArgs['onDeleted'] : null,
-            deleteIconColor: namedArgs.containsKey('deleteIconColor') ? namedArgs['deleteIconColor'] : null,
-            useDeleteButtonTooltip:
-                namedArgs.containsKey('useDeleteButtonTooltip') ? namedArgs['useDeleteButtonTooltip'] : true,
-            deleteButtonTooltipMessage:
-                namedArgs.containsKey('deleteButtonTooltipMessage') ? namedArgs['deleteButtonTooltipMessage'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            pressElevation: namedArgs.containsKey('pressElevation') ? namedArgs['pressElevation'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : true,
+            onSelected: namedArgs.containsKey('onSelected')
+                ? namedArgs['onSelected']
+                : null,
+            deleteIcon: namedArgs.containsKey('deleteIcon')
+                ? namedArgs['deleteIcon']
+                : null,
+            onDeleted: namedArgs.containsKey('onDeleted')
+                ? namedArgs['onDeleted']
+                : null,
+            deleteIconColor: namedArgs.containsKey('deleteIconColor')
+                ? namedArgs['deleteIconColor']
+                : null,
+            useDeleteButtonTooltip: namedArgs.containsKey('useDeleteButtonTooltip')
+                ? namedArgs['useDeleteButtonTooltip']
+                : true,
+            deleteButtonTooltipMessage: namedArgs.containsKey('deleteButtonTooltipMessage')
+                ? namedArgs['deleteButtonTooltipMessage']
+                : null,
+            onPressed: namedArgs.containsKey('onPressed')
+                ? namedArgs['onPressed']
+                : null,
+            pressElevation: namedArgs.containsKey('pressElevation')
+                ? namedArgs['pressElevation']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            materialTapTargetSize: namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
             elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
             shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
             selectedShadowColor: namedArgs.containsKey('selectedShadowColor') ? namedArgs['selectedShadowColor'] : null,
@@ -177,7 +261,7 @@ class InputChipAutoBinding extends HTExternalClass {
             checkmarkColor: namedArgs.containsKey('checkmarkColor') ? namedArgs['checkmarkColor'] : null,
             avatarBorder: namedArgs.containsKey('avatarBorder') ? namedArgs['avatarBorder'] : const CircleBorder());
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -188,7 +272,8 @@ class InputChipAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -197,7 +282,7 @@ extension InputChipBinding on InputChip {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InputChip');
+        return const HTType('InputChip');
       case 'avatar':
         return avatar;
       case 'label':
@@ -267,31 +352,44 @@ extension InputChipBinding on InputChip {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -305,32 +403,67 @@ class ChoiceChipAutoBinding extends HTExternalClass {
       case 'ChoiceChip':
         return ({positionalArgs, namedArgs, typeArgs}) => ChoiceChip(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            avatar: namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
+            avatar:
+                namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
             label: namedArgs['label'],
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            onSelected: namedArgs.containsKey('onSelected') ? namedArgs['onSelected'] : null,
-            pressElevation: namedArgs.containsKey('pressElevation') ? namedArgs['pressElevation'] : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            onSelected: namedArgs.containsKey('onSelected')
+                ? namedArgs['onSelected']
+                : null,
+            pressElevation: namedArgs.containsKey('pressElevation')
+                ? namedArgs['pressElevation']
+                : null,
             selected: namedArgs['selected'],
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            selectedShadowColor: namedArgs.containsKey('selectedShadowColor') ? namedArgs['selectedShadowColor'] : null,
-            avatarBorder: namedArgs.containsKey('avatarBorder') ? namedArgs['avatarBorder'] : const CircleBorder());
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            selectedShadowColor: namedArgs.containsKey('selectedShadowColor')
+                ? namedArgs['selectedShadowColor']
+                : null,
+            avatarBorder: namedArgs.containsKey('avatarBorder')
+                ? namedArgs['avatarBorder']
+                : const CircleBorder());
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -344,7 +477,7 @@ extension ChoiceChipBinding on ChoiceChip {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ChoiceChip');
+        return const HTType('ChoiceChip');
       case 'avatar':
         return avatar;
       case 'label':
@@ -398,31 +531,44 @@ extension ChoiceChipBinding on ChoiceChip {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -436,34 +582,73 @@ class FilterChipAutoBinding extends HTExternalClass {
       case 'FilterChip':
         return ({positionalArgs, namedArgs, typeArgs}) => FilterChip(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            avatar: namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
+            avatar:
+                namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
             label: namedArgs['label'],
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
             onSelected: namedArgs['onSelected'],
-            pressElevation: namedArgs.containsKey('pressElevation') ? namedArgs['pressElevation'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            pressElevation: namedArgs.containsKey('pressElevation')
+                ? namedArgs['pressElevation']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            selectedShadowColor: namedArgs.containsKey('selectedShadowColor') ? namedArgs['selectedShadowColor'] : null,
-            showCheckmark: namedArgs.containsKey('showCheckmark') ? namedArgs['showCheckmark'] : null,
-            checkmarkColor: namedArgs.containsKey('checkmarkColor') ? namedArgs['checkmarkColor'] : null,
-            avatarBorder: namedArgs.containsKey('avatarBorder') ? namedArgs['avatarBorder'] : const CircleBorder());
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            selectedShadowColor: namedArgs.containsKey('selectedShadowColor')
+                ? namedArgs['selectedShadowColor']
+                : null,
+            showCheckmark: namedArgs.containsKey('showCheckmark')
+                ? namedArgs['showCheckmark']
+                : null,
+            checkmarkColor: namedArgs.containsKey('checkmarkColor')
+                ? namedArgs['checkmarkColor']
+                : null,
+            avatarBorder: namedArgs.containsKey('avatarBorder')
+                ? namedArgs['avatarBorder']
+                : const CircleBorder());
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -477,7 +662,7 @@ extension FilterChipBinding on FilterChip {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FilterChip');
+        return const HTType('FilterChip');
       case 'avatar':
         return avatar;
       case 'label':
@@ -535,31 +720,44 @@ extension FilterChipBinding on FilterChip {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -573,27 +771,52 @@ class ActionChipAutoBinding extends HTExternalClass {
       case 'ActionChip':
         return ({positionalArgs, namedArgs, typeArgs}) => ActionChip(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            avatar: namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
+            avatar:
+                namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
             label: namedArgs['label'],
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
             onPressed: namedArgs['onPressed'],
-            pressElevation: namedArgs.containsKey('pressElevation') ? namedArgs['pressElevation'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            pressElevation: namedArgs.containsKey('pressElevation')
+                ? namedArgs['pressElevation']
+                : null,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -604,7 +827,8 @@ class ActionChipAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -613,7 +837,7 @@ extension ActionChipBinding on ActionChip {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ActionChip');
+        return const HTType('ActionChip');
       case 'avatar':
         return avatar;
       case 'label':
@@ -655,31 +879,44 @@ extension ActionChipBinding on ActionChip {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -693,36 +930,73 @@ class RawChipAutoBinding extends HTExternalClass {
       case 'RawChip':
         return ({positionalArgs, namedArgs, typeArgs}) => RawChip(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            avatar: namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
+            avatar:
+                namedArgs.containsKey('avatar') ? namedArgs['avatar'] : null,
             label: namedArgs['label'],
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            deleteIcon: namedArgs.containsKey('deleteIcon') ? namedArgs['deleteIcon'] : null,
-            onDeleted: namedArgs.containsKey('onDeleted') ? namedArgs['onDeleted'] : null,
-            deleteIconColor: namedArgs.containsKey('deleteIconColor') ? namedArgs['deleteIconColor'] : null,
-            useDeleteButtonTooltip:
-                namedArgs.containsKey('useDeleteButtonTooltip') ? namedArgs['useDeleteButtonTooltip'] : true,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            deleteIcon: namedArgs.containsKey('deleteIcon')
+                ? namedArgs['deleteIcon']
+                : null,
+            onDeleted: namedArgs.containsKey('onDeleted')
+                ? namedArgs['onDeleted']
+                : null,
+            deleteIconColor: namedArgs.containsKey('deleteIconColor')
+                ? namedArgs['deleteIconColor']
+                : null,
+            useDeleteButtonTooltip: namedArgs.containsKey('useDeleteButtonTooltip')
+                ? namedArgs['useDeleteButtonTooltip']
+                : true,
             deleteButtonTooltipMessage:
-                namedArgs.containsKey('deleteButtonTooltipMessage') ? namedArgs['deleteButtonTooltipMessage'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            onSelected: namedArgs.containsKey('onSelected') ? namedArgs['onSelected'] : null,
-            pressElevation: namedArgs.containsKey('pressElevation') ? namedArgs['pressElevation'] : null,
-            tapEnabled: namedArgs.containsKey('tapEnabled') ? namedArgs['tapEnabled'] : true,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : true,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+                namedArgs.containsKey('deleteButtonTooltipMessage')
+                    ? namedArgs['deleteButtonTooltipMessage']
+                    : null,
+            onPressed: namedArgs.containsKey('onPressed')
+                ? namedArgs['onPressed']
+                : null,
+            onSelected: namedArgs.containsKey('onSelected')
+                ? namedArgs['onSelected']
+                : null,
+            pressElevation: namedArgs.containsKey('pressElevation')
+                ? namedArgs['pressElevation']
+                : null,
+            tapEnabled: namedArgs.containsKey('tapEnabled')
+                ? namedArgs['tapEnabled']
+                : true,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : true,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
             autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
             backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
+            materialTapTargetSize: namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
             elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
             shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
             selectedShadowColor: namedArgs.containsKey('selectedShadowColor') ? namedArgs['selectedShadowColor'] : null,
@@ -730,7 +1004,7 @@ class RawChipAutoBinding extends HTExternalClass {
             checkmarkColor: namedArgs.containsKey('checkmarkColor') ? namedArgs['checkmarkColor'] : null,
             avatarBorder: namedArgs.containsKey('avatarBorder') ? namedArgs['avatarBorder'] : const CircleBorder());
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -741,7 +1015,8 @@ class RawChipAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -750,7 +1025,7 @@ extension RawChipBinding on RawChip {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawChip');
+        return const HTType('RawChip');
       case 'avatar':
         return avatar;
       case 'label':
@@ -828,25 +1103,37 @@ extension RawChipBinding on RawChip {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/chip_theme.g.dart b/lib/bindings/flutter/material/chip_theme.g.dart
index bc54548..84d5676 100644
--- a/lib/bindings/flutter/material/chip_theme.g.dart
+++ b/lib/bindings/flutter/material/chip_theme.g.dart
@@ -16,9 +16,10 @@ class ChipThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'ChipTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ChipTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ChipTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +33,7 @@ extension ChipThemeBinding on ChipTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ChipTheme');
+        return const HTType('ChipTheme');
       case 'data':
         return data;
       case 'child':
@@ -42,33 +43,47 @@ extension ChipThemeBinding on ChipTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -82,34 +97,55 @@ class ChipThemeDataAutoBinding extends HTExternalClass {
       case 'ChipThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => ChipThemeData(
             backgroundColor: namedArgs['backgroundColor'],
-            deleteIconColor: namedArgs.containsKey('deleteIconColor') ? namedArgs['deleteIconColor'] : null,
+            deleteIconColor: namedArgs.containsKey('deleteIconColor')
+                ? namedArgs['deleteIconColor']
+                : null,
             disabledColor: namedArgs['disabledColor'],
             selectedColor: namedArgs['selectedColor'],
             secondarySelectedColor: namedArgs['secondarySelectedColor'],
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            selectedShadowColor: namedArgs.containsKey('selectedShadowColor') ? namedArgs['selectedShadowColor'] : null,
-            showCheckmark: namedArgs.containsKey('showCheckmark') ? namedArgs['showCheckmark'] : null,
-            checkmarkColor: namedArgs.containsKey('checkmarkColor') ? namedArgs['checkmarkColor'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            selectedShadowColor: namedArgs.containsKey('selectedShadowColor')
+                ? namedArgs['selectedShadowColor']
+                : null,
+            showCheckmark: namedArgs.containsKey('showCheckmark')
+                ? namedArgs['showCheckmark']
+                : null,
+            checkmarkColor: namedArgs.containsKey('checkmarkColor')
+                ? namedArgs['checkmarkColor']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
             padding: namedArgs['padding'],
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
             labelStyle: namedArgs['labelStyle'],
             secondaryLabelStyle: namedArgs['secondaryLabelStyle'],
             brightness: namedArgs['brightness'],
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            pressElevation: namedArgs.containsKey('pressElevation') ? namedArgs['pressElevation'] : null);
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            pressElevation: namedArgs.containsKey('pressElevation')
+                ? namedArgs['pressElevation']
+                : null);
       case 'ChipThemeData.fromDefaults':
-        return ({positionalArgs, namedArgs, typeArgs}) => ChipThemeData.fromDefaults(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
-            secondaryColor: namedArgs['secondaryColor'],
-            labelStyle: namedArgs['labelStyle']);
-      case 'ChipThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ChipThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ChipThemeData.fromDefaults(
+                brightness: namedArgs.containsKey('brightness')
+                    ? namedArgs['brightness']
+                    : null,
+                primaryColor: namedArgs.containsKey('primaryColor')
+                    ? namedArgs['primaryColor']
+                    : null,
+                secondaryColor: namedArgs['secondaryColor'],
+                labelStyle: namedArgs['labelStyle']);
+      case 'ChipThemeData.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => ChipThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -123,7 +159,7 @@ extension ChipThemeDataBinding on ChipThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ChipThemeData');
+        return const HTType('ChipThemeData');
       case 'backgroundColor':
         return backgroundColor;
       case 'deleteIconColor':
@@ -164,37 +200,69 @@ extension ChipThemeDataBinding on ChipThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            deleteIconColor: namedArgs.containsKey('deleteIconColor') ? namedArgs['deleteIconColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            deleteIconColor: namedArgs.containsKey('deleteIconColor')
+                ? namedArgs['deleteIconColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
             secondarySelectedColor:
-                namedArgs.containsKey('secondarySelectedColor') ? namedArgs['secondarySelectedColor'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            selectedShadowColor: namedArgs.containsKey('selectedShadowColor') ? namedArgs['selectedShadowColor'] : null,
-            checkmarkColor: namedArgs.containsKey('checkmarkColor') ? namedArgs['checkmarkColor'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+                namedArgs.containsKey('secondarySelectedColor')
+                    ? namedArgs['secondarySelectedColor']
+                    : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            selectedShadowColor: namedArgs.containsKey('selectedShadowColor')
+                ? namedArgs['selectedShadowColor']
+                : null,
+            checkmarkColor: namedArgs.containsKey('checkmarkColor')
+                ? namedArgs['checkmarkColor']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            secondaryLabelStyle: namedArgs.containsKey('secondaryLabelStyle') ? namedArgs['secondaryLabelStyle'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            pressElevation: namedArgs.containsKey('pressElevation') ? namedArgs['pressElevation'] : null);
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            secondaryLabelStyle: namedArgs.containsKey('secondaryLabelStyle')
+                ? namedArgs['secondaryLabelStyle']
+                : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            pressElevation: namedArgs.containsKey('pressElevation')
+                ? namedArgs['pressElevation']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/circle_avatar.g.dart b/lib/bindings/flutter/material/circle_avatar.g.dart
index e35cbcc..f0aa06d 100644
--- a/lib/bindings/flutter/material/circle_avatar.g.dart
+++ b/lib/bindings/flutter/material/circle_avatar.g.dart
@@ -12,19 +12,36 @@ class CircleAvatarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => CircleAvatar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            backgroundImage: namedArgs.containsKey('backgroundImage') ? namedArgs['backgroundImage'] : null,
-            foregroundImage: namedArgs.containsKey('foregroundImage') ? namedArgs['foregroundImage'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            backgroundImage: namedArgs.containsKey('backgroundImage')
+                ? namedArgs['backgroundImage']
+                : null,
+            foregroundImage: namedArgs.containsKey('foregroundImage')
+                ? namedArgs['foregroundImage']
+                : null,
             onBackgroundImageError:
-                namedArgs.containsKey('onBackgroundImageError') ? namedArgs['onBackgroundImageError'] : null,
+                namedArgs.containsKey('onBackgroundImageError')
+                    ? namedArgs['onBackgroundImageError']
+                    : null,
             onForegroundImageError:
-                namedArgs.containsKey('onForegroundImageError') ? namedArgs['onForegroundImageError'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            minRadius: namedArgs.containsKey('minRadius') ? namedArgs['minRadius'] : null,
-            maxRadius: namedArgs.containsKey('maxRadius') ? namedArgs['maxRadius'] : null);
+                namedArgs.containsKey('onForegroundImageError')
+                    ? namedArgs['onForegroundImageError']
+                    : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            minRadius: namedArgs.containsKey('minRadius')
+                ? namedArgs['minRadius']
+                : null,
+            maxRadius: namedArgs.containsKey('maxRadius')
+                ? namedArgs['maxRadius']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,8 +52,9 @@ class CircleAvatarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -45,7 +63,7 @@ extension CircleAvatarBinding on CircleAvatar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CircleAvatar');
+        return const HTType('CircleAvatar');
       case 'child':
         return child;
       case 'backgroundColor':
@@ -71,31 +89,44 @@ extension CircleAvatarBinding on CircleAvatar {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/color_scheme.g.dart b/lib/bindings/flutter/material/color_scheme.g.dart
index aa8b669..502d184 100644
--- a/lib/bindings/flutter/material/color_scheme.g.dart
+++ b/lib/bindings/flutter/material/color_scheme.g.dart
@@ -27,86 +27,219 @@ class ColorSchemeAutoBinding extends HTExternalClass {
             brightness: namedArgs['brightness']);
       case 'ColorScheme.light':
         return ({positionalArgs, namedArgs, typeArgs}) => ColorScheme.light(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : const Color(0xff6200ee),
-            primaryVariant:
-                namedArgs.containsKey('primaryVariant') ? namedArgs['primaryVariant'] : const Color(0xff3700b3),
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : const Color(0xff03dac6),
-            secondaryVariant:
-                namedArgs.containsKey('secondaryVariant') ? namedArgs['secondaryVariant'] : const Color(0xff018786),
-            surface: namedArgs.containsKey('surface') ? namedArgs['surface'] : Colors.white,
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : Colors.white,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : const Color(0xffb00020),
-            onPrimary: namedArgs.containsKey('onPrimary') ? namedArgs['onPrimary'] : Colors.white,
-            onSecondary: namedArgs.containsKey('onSecondary') ? namedArgs['onSecondary'] : Colors.black,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : Colors.black,
-            onBackground: namedArgs.containsKey('onBackground') ? namedArgs['onBackground'] : Colors.black,
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : Colors.white,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : Brightness.light);
+            primary: namedArgs.containsKey('primary')
+                ? namedArgs['primary']
+                : const Color(0xff6200ee),
+            primaryVariant: namedArgs.containsKey('primaryVariant')
+                ? namedArgs['primaryVariant']
+                : const Color(0xff3700b3),
+            secondary: namedArgs.containsKey('secondary')
+                ? namedArgs['secondary']
+                : const Color(0xff03dac6),
+            secondaryVariant: namedArgs.containsKey('secondaryVariant')
+                ? namedArgs['secondaryVariant']
+                : const Color(0xff018786),
+            surface: namedArgs.containsKey('surface')
+                ? namedArgs['surface']
+                : Colors.white,
+            background: namedArgs.containsKey('background')
+                ? namedArgs['background']
+                : Colors.white,
+            error: namedArgs.containsKey('error')
+                ? namedArgs['error']
+                : const Color(0xffb00020),
+            onPrimary: namedArgs.containsKey('onPrimary')
+                ? namedArgs['onPrimary']
+                : Colors.white,
+            onSecondary: namedArgs.containsKey('onSecondary')
+                ? namedArgs['onSecondary']
+                : Colors.black,
+            onSurface: namedArgs.containsKey('onSurface')
+                ? namedArgs['onSurface']
+                : Colors.black,
+            onBackground: namedArgs.containsKey('onBackground')
+                ? namedArgs['onBackground']
+                : Colors.black,
+            onError: namedArgs.containsKey('onError')
+                ? namedArgs['onError']
+                : Colors.white,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : Brightness.light);
       case 'ColorScheme.dark':
         return ({positionalArgs, namedArgs, typeArgs}) => ColorScheme.dark(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : const Color(0xffbb86fc),
-            primaryVariant:
-                namedArgs.containsKey('primaryVariant') ? namedArgs['primaryVariant'] : const Color(0xff3700B3),
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : const Color(0xff03dac6),
-            secondaryVariant:
-                namedArgs.containsKey('secondaryVariant') ? namedArgs['secondaryVariant'] : const Color(0xff03dac6),
-            surface: namedArgs.containsKey('surface') ? namedArgs['surface'] : const Color(0xff121212),
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : const Color(0xff121212),
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : const Color(0xffcf6679),
-            onPrimary: namedArgs.containsKey('onPrimary') ? namedArgs['onPrimary'] : Colors.black,
-            onSecondary: namedArgs.containsKey('onSecondary') ? namedArgs['onSecondary'] : Colors.black,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : Colors.white,
-            onBackground: namedArgs.containsKey('onBackground') ? namedArgs['onBackground'] : Colors.white,
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : Colors.black,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : Brightness.dark);
+            primary: namedArgs.containsKey('primary')
+                ? namedArgs['primary']
+                : const Color(0xffbb86fc),
+            primaryVariant: namedArgs.containsKey('primaryVariant')
+                ? namedArgs['primaryVariant']
+                : const Color(0xff3700B3),
+            secondary: namedArgs.containsKey('secondary')
+                ? namedArgs['secondary']
+                : const Color(0xff03dac6),
+            secondaryVariant: namedArgs.containsKey('secondaryVariant')
+                ? namedArgs['secondaryVariant']
+                : const Color(0xff03dac6),
+            surface: namedArgs.containsKey('surface')
+                ? namedArgs['surface']
+                : const Color(0xff121212),
+            background: namedArgs.containsKey('background')
+                ? namedArgs['background']
+                : const Color(0xff121212),
+            error: namedArgs.containsKey('error')
+                ? namedArgs['error']
+                : const Color(0xffcf6679),
+            onPrimary: namedArgs.containsKey('onPrimary')
+                ? namedArgs['onPrimary']
+                : Colors.black,
+            onSecondary: namedArgs.containsKey('onSecondary')
+                ? namedArgs['onSecondary']
+                : Colors.black,
+            onSurface: namedArgs.containsKey('onSurface')
+                ? namedArgs['onSurface']
+                : Colors.white,
+            onBackground: namedArgs.containsKey('onBackground')
+                ? namedArgs['onBackground']
+                : Colors.white,
+            onError: namedArgs.containsKey('onError')
+                ? namedArgs['onError']
+                : Colors.black,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : Brightness.dark);
       case 'ColorScheme.highContrastLight':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorScheme.highContrastLight(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : const Color(0xff0000ba),
-            primaryVariant:
-                namedArgs.containsKey('primaryVariant') ? namedArgs['primaryVariant'] : const Color(0xff000088),
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : const Color(0xff66fff9),
-            secondaryVariant:
-                namedArgs.containsKey('secondaryVariant') ? namedArgs['secondaryVariant'] : const Color(0xff018786),
-            surface: namedArgs.containsKey('surface') ? namedArgs['surface'] : Colors.white,
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : Colors.white,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : const Color(0xff790000),
-            onPrimary: namedArgs.containsKey('onPrimary') ? namedArgs['onPrimary'] : Colors.white,
-            onSecondary: namedArgs.containsKey('onSecondary') ? namedArgs['onSecondary'] : Colors.black,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : Colors.black,
-            onBackground: namedArgs.containsKey('onBackground') ? namedArgs['onBackground'] : Colors.black,
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : Colors.white,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : Brightness.light);
+        return ({positionalArgs, namedArgs, typeArgs}) => ColorScheme
+            .highContrastLight(
+                primary: namedArgs.containsKey('primary')
+                    ? namedArgs['primary']
+                    : const Color(0xff0000ba),
+                primaryVariant:
+                    namedArgs.containsKey(
+                            'primaryVariant')
+                        ? namedArgs['primaryVariant']
+                        : const Color(0xff000088),
+                secondary:
+                    namedArgs.containsKey(
+                            'secondary')
+                        ? namedArgs['secondary']
+                        : const Color(0xff66fff9),
+                secondaryVariant:
+                    namedArgs.containsKey(
+                            'secondaryVariant')
+                        ? namedArgs['secondaryVariant']
+                        : const Color(0xff018786),
+                surface:
+                    namedArgs.containsKey(
+                            'surface')
+                        ? namedArgs['surface']
+                        : Colors.white,
+                background:
+                    namedArgs.containsKey(
+                            'background')
+                        ? namedArgs['background']
+                        : Colors.white,
+                error:
+                    namedArgs.containsKey(
+                            'error')
+                        ? namedArgs['error']
+                        : const Color(0xff790000),
+                onPrimary:
+                    namedArgs.containsKey(
+                            'onPrimary')
+                        ? namedArgs['onPrimary']
+                        : Colors.white,
+                onSecondary:
+                    namedArgs.containsKey(
+                            'onSecondary')
+                        ? namedArgs['onSecondary']
+                        : Colors.black,
+                onSurface:
+                    namedArgs.containsKey(
+                            'onSurface')
+                        ? namedArgs['onSurface']
+                        : Colors.black,
+                onBackground:
+                    namedArgs
+                            .containsKey('onBackground')
+                        ? namedArgs['onBackground']
+                        : Colors.black,
+                onError: namedArgs.containsKey('onError')
+                    ? namedArgs['onError']
+                    : Colors.white,
+                brightness: namedArgs.containsKey('brightness')
+                    ? namedArgs['brightness']
+                    : Brightness.light);
       case 'ColorScheme.highContrastDark':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorScheme.highContrastDark(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : const Color(0xffefb7ff),
-            primaryVariant:
-                namedArgs.containsKey('primaryVariant') ? namedArgs['primaryVariant'] : const Color(0xffbe9eff),
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : const Color(0xff66fff9),
-            secondaryVariant:
-                namedArgs.containsKey('secondaryVariant') ? namedArgs['secondaryVariant'] : const Color(0xff66fff9),
-            surface: namedArgs.containsKey('surface') ? namedArgs['surface'] : const Color(0xff121212),
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : const Color(0xff121212),
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : const Color(0xff9b374d),
-            onPrimary: namedArgs.containsKey('onPrimary') ? namedArgs['onPrimary'] : Colors.black,
-            onSecondary: namedArgs.containsKey('onSecondary') ? namedArgs['onSecondary'] : Colors.black,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : Colors.white,
-            onBackground: namedArgs.containsKey('onBackground') ? namedArgs['onBackground'] : Colors.white,
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : Colors.black,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : Brightness.dark);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ColorScheme.highContrastDark(
+                primary: namedArgs.containsKey('primary')
+                    ? namedArgs['primary']
+                    : const Color(0xffefb7ff),
+                primaryVariant: namedArgs.containsKey('primaryVariant')
+                    ? namedArgs['primaryVariant']
+                    : const Color(0xffbe9eff),
+                secondary: namedArgs.containsKey('secondary')
+                    ? namedArgs['secondary']
+                    : const Color(0xff66fff9),
+                secondaryVariant: namedArgs.containsKey('secondaryVariant')
+                    ? namedArgs['secondaryVariant']
+                    : const Color(0xff66fff9),
+                surface: namedArgs.containsKey('surface')
+                    ? namedArgs['surface']
+                    : const Color(0xff121212),
+                background: namedArgs.containsKey('background')
+                    ? namedArgs['background']
+                    : const Color(0xff121212),
+                error: namedArgs.containsKey('error')
+                    ? namedArgs['error']
+                    : const Color(0xff9b374d),
+                onPrimary: namedArgs.containsKey('onPrimary')
+                    ? namedArgs['onPrimary']
+                    : Colors.black,
+                onSecondary: namedArgs.containsKey('onSecondary')
+                    ? namedArgs['onSecondary']
+                    : Colors.black,
+                onSurface: namedArgs.containsKey('onSurface')
+                    ? namedArgs['onSurface']
+                    : Colors.white,
+                onBackground: namedArgs.containsKey('onBackground')
+                    ? namedArgs['onBackground']
+                    : Colors.white,
+                onError: namedArgs.containsKey('onError')
+                    ? namedArgs['onError']
+                    : Colors.black,
+                brightness: namedArgs.containsKey('brightness')
+                    ? namedArgs['brightness']
+                    : Brightness.dark);
       case 'ColorScheme.fromSwatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorScheme.fromSwatch(
-            primarySwatch: namedArgs.containsKey('primarySwatch') ? namedArgs['primarySwatch'] : Colors.blue,
-            primaryColorDark: namedArgs.containsKey('primaryColorDark') ? namedArgs['primaryColorDark'] : null,
-            accentColor: namedArgs.containsKey('accentColor') ? namedArgs['accentColor'] : null,
-            cardColor: namedArgs.containsKey('cardColor') ? namedArgs['cardColor'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            errorColor: namedArgs.containsKey('errorColor') ? namedArgs['errorColor'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : Brightness.light);
-      case 'ColorScheme.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ColorScheme.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ColorScheme.fromSwatch(
+                primarySwatch: namedArgs.containsKey('primarySwatch')
+                    ? namedArgs['primarySwatch']
+                    : Colors.blue,
+                primaryColorDark: namedArgs.containsKey('primaryColorDark')
+                    ? namedArgs['primaryColorDark']
+                    : null,
+                accentColor: namedArgs.containsKey('accentColor')
+                    ? namedArgs['accentColor']
+                    : null,
+                cardColor: namedArgs.containsKey('cardColor')
+                    ? namedArgs['cardColor']
+                    : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                errorColor: namedArgs.containsKey('errorColor')
+                    ? namedArgs['errorColor']
+                    : null,
+                brightness: namedArgs.containsKey('brightness')
+                    ? namedArgs['brightness']
+                    : Brightness.light);
+      case 'ColorScheme.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => ColorScheme.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -120,7 +253,7 @@ extension ColorSchemeBinding on ColorScheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ColorScheme');
+        return const HTType('ColorScheme');
       case 'primary':
         return primary;
       case 'primaryVariant':
@@ -151,32 +284,56 @@ extension ColorSchemeBinding on ColorScheme {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            primaryVariant: namedArgs.containsKey('primaryVariant') ? namedArgs['primaryVariant'] : null,
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : null,
-            secondaryVariant: namedArgs.containsKey('secondaryVariant') ? namedArgs['secondaryVariant'] : null,
-            surface: namedArgs.containsKey('surface') ? namedArgs['surface'] : null,
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            primaryVariant: namedArgs.containsKey('primaryVariant')
+                ? namedArgs['primaryVariant']
+                : null,
+            secondary: namedArgs.containsKey('secondary')
+                ? namedArgs['secondary']
+                : null,
+            secondaryVariant: namedArgs.containsKey('secondaryVariant')
+                ? namedArgs['secondaryVariant']
+                : null,
+            surface:
+                namedArgs.containsKey('surface') ? namedArgs['surface'] : null,
+            background: namedArgs.containsKey('background')
+                ? namedArgs['background']
+                : null,
             error: namedArgs.containsKey('error') ? namedArgs['error'] : null,
-            onPrimary: namedArgs.containsKey('onPrimary') ? namedArgs['onPrimary'] : null,
-            onSecondary: namedArgs.containsKey('onSecondary') ? namedArgs['onSecondary'] : null,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : null,
-            onBackground: namedArgs.containsKey('onBackground') ? namedArgs['onBackground'] : null,
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : null,
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null);
+            onPrimary: namedArgs.containsKey('onPrimary')
+                ? namedArgs['onPrimary']
+                : null,
+            onSecondary: namedArgs.containsKey('onSecondary')
+                ? namedArgs['onSecondary']
+                : null,
+            onSurface: namedArgs.containsKey('onSurface')
+                ? namedArgs['onSurface']
+                : null,
+            onBackground: namedArgs.containsKey('onBackground')
+                ? namedArgs['onBackground']
+                : null,
+            onError:
+                namedArgs.containsKey('onError') ? namedArgs['onError'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/colors.g.dart b/lib/bindings/flutter/material/colors.g.dart
index ddcfec1..03ab8ce 100644
--- a/lib/bindings/flutter/material/colors.g.dart
+++ b/lib/bindings/flutter/material/colors.g.dart
@@ -8,9 +8,10 @@ class MaterialColorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialColor(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialColor(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +25,7 @@ extension MaterialColorBinding on MaterialColor {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialColor');
+        return const HTType('MaterialColor');
       case 'value':
         return value;
       case 'shade50':
@@ -62,19 +63,24 @@ extension MaterialColorBinding on MaterialColor {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'withAlpha':
-        return ({positionalArgs, namedArgs, typeArgs}) => withAlpha(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withAlpha(positionalArgs[0]);
       case 'withOpacity':
-        return ({positionalArgs, namedArgs, typeArgs}) => withOpacity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withOpacity(positionalArgs[0]);
       case 'withRed':
-        return ({positionalArgs, namedArgs, typeArgs}) => withRed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withRed(positionalArgs[0]);
       case 'withGreen':
-        return ({positionalArgs, namedArgs, typeArgs}) => withGreen(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withGreen(positionalArgs[0]);
       case 'withBlue':
-        return ({positionalArgs, namedArgs, typeArgs}) => withBlue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withBlue(positionalArgs[0]);
       case 'computeLuminance':
         return ({positionalArgs, namedArgs, typeArgs}) => computeLuminance();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -86,9 +92,10 @@ class MaterialAccentColorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialAccentColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialAccentColor(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialAccentColor(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -102,7 +109,7 @@ extension MaterialAccentColorBinding on MaterialAccentColor {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialAccentColor');
+        return const HTType('MaterialAccentColor');
       case 'value':
         return value;
       case 'shade50':
@@ -130,19 +137,24 @@ extension MaterialAccentColorBinding on MaterialAccentColor {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'withAlpha':
-        return ({positionalArgs, namedArgs, typeArgs}) => withAlpha(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withAlpha(positionalArgs[0]);
       case 'withOpacity':
-        return ({positionalArgs, namedArgs, typeArgs}) => withOpacity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withOpacity(positionalArgs[0]);
       case 'withRed':
-        return ({positionalArgs, namedArgs, typeArgs}) => withRed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withRed(positionalArgs[0]);
       case 'withGreen':
-        return ({positionalArgs, namedArgs, typeArgs}) => withGreen(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withGreen(positionalArgs[0]);
       case 'withBlue':
-        return ({positionalArgs, namedArgs, typeArgs}) => withBlue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withBlue(positionalArgs[0]);
       case 'computeLuminance':
         return ({positionalArgs, namedArgs, typeArgs}) => computeLuminance();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -262,7 +274,7 @@ class ColorsAutoBinding extends HTExternalClass {
       case 'Colors.accents':
         return Colors.accents;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/data_table.g.dart b/lib/bindings/flutter/material/data_table.g.dart
index af63ab8..0f0a247 100644
--- a/lib/bindings/flutter/material/data_table.g.dart
+++ b/lib/bindings/flutter/material/data_table.g.dart
@@ -13,11 +13,14 @@ class DataColumnAutoBinding extends HTExternalClass {
       case 'DataColumn':
         return ({positionalArgs, namedArgs, typeArgs}) => DataColumn(
             label: namedArgs['label'],
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
-            numeric: namedArgs.containsKey('numeric') ? namedArgs['numeric'] : false,
-            onSort: namedArgs.containsKey('onSort') ? namedArgs['onSort'] : null);
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            numeric:
+                namedArgs.containsKey('numeric') ? namedArgs['numeric'] : false,
+            onSort:
+                namedArgs.containsKey('onSort') ? namedArgs['onSort'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +32,8 @@ class DataColumnAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'DataColumnSortCallback': (HTFunction function) =>
-          (columnIndex, ascending) => function.call(positionalArgs: [columnIndex, ascending], namedArgs: const {}),
+          (columnIndex, ascending) => function.call(
+              positionalArgs: [columnIndex, ascending], namedArgs: const {}),
     };
   }
 }
@@ -38,7 +42,7 @@ extension DataColumnBinding on DataColumn {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DataColumn');
+        return const HTType('DataColumn');
       case 'label':
         return label;
       case 'tooltip':
@@ -48,7 +52,7 @@ extension DataColumnBinding on DataColumn {
       case 'onSort':
         return onSort;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -62,19 +66,27 @@ class DataRowAutoBinding extends HTExternalClass {
       case 'DataRow':
         return ({positionalArgs, namedArgs, typeArgs}) => DataRow(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
-            onSelectChanged: namedArgs.containsKey('onSelectChanged') ? namedArgs['onSelectChanged'] : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
+            onSelectChanged: namedArgs.containsKey('onSelectChanged')
+                ? namedArgs['onSelectChanged']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             cells: List<DataCell>.from(namedArgs['cells']));
       case 'DataRow.byIndex':
         return ({positionalArgs, namedArgs, typeArgs}) => DataRow.byIndex(
             index: namedArgs.containsKey('index') ? namedArgs['index'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
-            onSelectChanged: namedArgs.containsKey('onSelectChanged') ? namedArgs['onSelectChanged'] : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
+            onSelectChanged: namedArgs.containsKey('onSelectChanged')
+                ? namedArgs['onSelectChanged']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             cells: List<DataCell>.from(namedArgs['cells']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -88,7 +100,7 @@ extension DataRowBinding on DataRow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DataRow');
+        return const HTType('DataRow');
       case 'key':
         return key;
       case 'onSelectChanged':
@@ -100,7 +112,7 @@ extension DataRowBinding on DataRow {
       case 'color':
         return color;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -112,14 +124,19 @@ class DataCellAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DataCell':
-        return ({positionalArgs, namedArgs, typeArgs}) => DataCell(positionalArgs[0],
-            placeholder: namedArgs.containsKey('placeholder') ? namedArgs['placeholder'] : false,
-            showEditIcon: namedArgs.containsKey('showEditIcon') ? namedArgs['showEditIcon'] : false,
+        return ({positionalArgs, namedArgs, typeArgs}) => DataCell(
+            positionalArgs[0],
+            placeholder: namedArgs.containsKey('placeholder')
+                ? namedArgs['placeholder']
+                : false,
+            showEditIcon: namedArgs.containsKey('showEditIcon')
+                ? namedArgs['showEditIcon']
+                : false,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null);
       case 'DataCell.empty':
         return DataCell.empty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -130,7 +147,8 @@ class DataCellAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -139,7 +157,7 @@ extension DataCellBinding on DataCell {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DataCell');
+        return const HTType('DataCell');
       case 'child':
         return child;
       case 'placeholder':
@@ -149,7 +167,7 @@ extension DataCellBinding on DataCell {
       case 'onTap':
         return onTap;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -164,24 +182,54 @@ class DataTableAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => DataTable(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             columns: List<DataColumn>.from(namedArgs['columns']),
-            sortColumnIndex: namedArgs.containsKey('sortColumnIndex') ? namedArgs['sortColumnIndex'] : null,
-            sortAscending: namedArgs.containsKey('sortAscending') ? namedArgs['sortAscending'] : true,
-            onSelectAll: namedArgs.containsKey('onSelectAll') ? namedArgs['onSelectAll'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            dataRowColor: namedArgs.containsKey('dataRowColor') ? namedArgs['dataRowColor'] : null,
-            dataRowHeight: namedArgs.containsKey('dataRowHeight') ? namedArgs['dataRowHeight'] : null,
-            dataTextStyle: namedArgs.containsKey('dataTextStyle') ? namedArgs['dataTextStyle'] : null,
-            headingRowColor: namedArgs.containsKey('headingRowColor') ? namedArgs['headingRowColor'] : null,
-            headingRowHeight: namedArgs.containsKey('headingRowHeight') ? namedArgs['headingRowHeight'] : null,
-            headingTextStyle: namedArgs.containsKey('headingTextStyle') ? namedArgs['headingTextStyle'] : null,
-            horizontalMargin: namedArgs.containsKey('horizontalMargin') ? namedArgs['horizontalMargin'] : null,
-            columnSpacing: namedArgs.containsKey('columnSpacing') ? namedArgs['columnSpacing'] : null,
-            showCheckboxColumn: namedArgs.containsKey('showCheckboxColumn') ? namedArgs['showCheckboxColumn'] : true,
-            showBottomBorder: namedArgs.containsKey('showBottomBorder') ? namedArgs['showBottomBorder'] : false,
-            dividerThickness: namedArgs.containsKey('dividerThickness') ? namedArgs['dividerThickness'] : null,
+            sortColumnIndex: namedArgs.containsKey('sortColumnIndex')
+                ? namedArgs['sortColumnIndex']
+                : null,
+            sortAscending: namedArgs.containsKey('sortAscending')
+                ? namedArgs['sortAscending']
+                : true,
+            onSelectAll: namedArgs.containsKey('onSelectAll')
+                ? namedArgs['onSelectAll']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            dataRowColor: namedArgs.containsKey('dataRowColor')
+                ? namedArgs['dataRowColor']
+                : null,
+            dataRowHeight: namedArgs.containsKey('dataRowHeight')
+                ? namedArgs['dataRowHeight']
+                : null,
+            dataTextStyle: namedArgs.containsKey('dataTextStyle')
+                ? namedArgs['dataTextStyle']
+                : null,
+            headingRowColor: namedArgs.containsKey('headingRowColor')
+                ? namedArgs['headingRowColor']
+                : null,
+            headingRowHeight: namedArgs.containsKey('headingRowHeight')
+                ? namedArgs['headingRowHeight']
+                : null,
+            headingTextStyle: namedArgs.containsKey('headingTextStyle')
+                ? namedArgs['headingTextStyle']
+                : null,
+            horizontalMargin: namedArgs.containsKey('horizontalMargin')
+                ? namedArgs['horizontalMargin']
+                : null,
+            columnSpacing: namedArgs.containsKey('columnSpacing')
+                ? namedArgs['columnSpacing']
+                : null,
+            showCheckboxColumn: namedArgs.containsKey('showCheckboxColumn')
+                ? namedArgs['showCheckboxColumn']
+                : true,
+            showBottomBorder: namedArgs.containsKey('showBottomBorder')
+                ? namedArgs['showBottomBorder']
+                : false,
+            dividerThickness: namedArgs.containsKey('dividerThickness')
+                ? namedArgs['dividerThickness']
+                : null,
             rows: List<DataRow>.from(namedArgs['rows']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -195,7 +243,7 @@ extension DataTableBinding on DataTable {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DataTable');
+        return const HTType('DataTable');
       case 'columns':
         return columns;
       case 'sortColumnIndex':
@@ -235,31 +283,44 @@ extension DataTableBinding on DataTable {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -275,12 +336,20 @@ class TableRowInkWellAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onDoubleTap: namedArgs.containsKey('onDoubleTap') ? namedArgs['onDoubleTap'] : null,
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onHighlightChanged: namedArgs.containsKey('onHighlightChanged') ? namedArgs['onHighlightChanged'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null);
+            onDoubleTap: namedArgs.containsKey('onDoubleTap')
+                ? namedArgs['onDoubleTap']
+                : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            onHighlightChanged: namedArgs.containsKey('onHighlightChanged')
+                ? namedArgs['onHighlightChanged']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -291,7 +360,8 @@ class TableRowInkWellAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
       'GestureLongPressCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
@@ -302,7 +372,7 @@ extension TableRowInkWellBinding on TableRowInkWell {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TableRowInkWell');
+        return const HTType('TableRowInkWell');
       case 'child':
         return child;
       case 'onTap':
@@ -360,35 +430,50 @@ extension TableRowInkWellBinding on TableRowInkWell {
       case 'hashCode':
         return hashCode;
       case 'getRectCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => getRectCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getRectCallback(positionalArgs[0]);
       case 'debugCheckContext':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCheckContext(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCheckContext(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/data_table_theme.g.dart b/lib/bindings/flutter/material/data_table_theme.g.dart
index d4dec37..0b35815 100644
--- a/lib/bindings/flutter/material/data_table_theme.g.dart
+++ b/lib/bindings/flutter/material/data_table_theme.g.dart
@@ -11,21 +11,42 @@ class DataTableThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DataTableThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => DataTableThemeData(
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            dataRowColor: namedArgs.containsKey('dataRowColor') ? namedArgs['dataRowColor'] : null,
-            dataRowHeight: namedArgs.containsKey('dataRowHeight') ? namedArgs['dataRowHeight'] : null,
-            dataTextStyle: namedArgs.containsKey('dataTextStyle') ? namedArgs['dataTextStyle'] : null,
-            headingRowColor: namedArgs.containsKey('headingRowColor') ? namedArgs['headingRowColor'] : null,
-            headingRowHeight: namedArgs.containsKey('headingRowHeight') ? namedArgs['headingRowHeight'] : null,
-            headingTextStyle: namedArgs.containsKey('headingTextStyle') ? namedArgs['headingTextStyle'] : null,
-            horizontalMargin: namedArgs.containsKey('horizontalMargin') ? namedArgs['horizontalMargin'] : null,
-            columnSpacing: namedArgs.containsKey('columnSpacing') ? namedArgs['columnSpacing'] : null,
-            dividerThickness: namedArgs.containsKey('dividerThickness') ? namedArgs['dividerThickness'] : null);
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            dataRowColor: namedArgs.containsKey('dataRowColor')
+                ? namedArgs['dataRowColor']
+                : null,
+            dataRowHeight: namedArgs.containsKey('dataRowHeight')
+                ? namedArgs['dataRowHeight']
+                : null,
+            dataTextStyle: namedArgs.containsKey('dataTextStyle')
+                ? namedArgs['dataTextStyle']
+                : null,
+            headingRowColor: namedArgs.containsKey('headingRowColor')
+                ? namedArgs['headingRowColor']
+                : null,
+            headingRowHeight: namedArgs.containsKey('headingRowHeight')
+                ? namedArgs['headingRowHeight']
+                : null,
+            headingTextStyle: namedArgs.containsKey('headingTextStyle')
+                ? namedArgs['headingTextStyle']
+                : null,
+            horizontalMargin: namedArgs.containsKey('horizontalMargin')
+                ? namedArgs['horizontalMargin']
+                : null,
+            columnSpacing: namedArgs.containsKey('columnSpacing')
+                ? namedArgs['columnSpacing']
+                : null,
+            dividerThickness: namedArgs.containsKey('dividerThickness')
+                ? namedArgs['dividerThickness']
+                : null);
       case 'DataTableThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            DataTableThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            DataTableThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -39,7 +60,7 @@ extension DataTableThemeDataBinding on DataTableThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DataTableThemeData');
+        return const HTType('DataTableThemeData');
       case 'decoration':
         return decoration;
       case 'dataRowColor':
@@ -64,29 +85,52 @@ extension DataTableThemeDataBinding on DataTableThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            dataRowColor: namedArgs.containsKey('dataRowColor') ? namedArgs['dataRowColor'] : null,
-            dataRowHeight: namedArgs.containsKey('dataRowHeight') ? namedArgs['dataRowHeight'] : null,
-            dataTextStyle: namedArgs.containsKey('dataTextStyle') ? namedArgs['dataTextStyle'] : null,
-            headingRowColor: namedArgs.containsKey('headingRowColor') ? namedArgs['headingRowColor'] : null,
-            headingRowHeight: namedArgs.containsKey('headingRowHeight') ? namedArgs['headingRowHeight'] : null,
-            headingTextStyle: namedArgs.containsKey('headingTextStyle') ? namedArgs['headingTextStyle'] : null,
-            horizontalMargin: namedArgs.containsKey('horizontalMargin') ? namedArgs['horizontalMargin'] : null,
-            columnSpacing: namedArgs.containsKey('columnSpacing') ? namedArgs['columnSpacing'] : null,
-            dividerThickness: namedArgs.containsKey('dividerThickness') ? namedArgs['dividerThickness'] : null);
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            dataRowColor: namedArgs.containsKey('dataRowColor')
+                ? namedArgs['dataRowColor']
+                : null,
+            dataRowHeight: namedArgs.containsKey('dataRowHeight')
+                ? namedArgs['dataRowHeight']
+                : null,
+            dataTextStyle: namedArgs.containsKey('dataTextStyle')
+                ? namedArgs['dataTextStyle']
+                : null,
+            headingRowColor: namedArgs.containsKey('headingRowColor')
+                ? namedArgs['headingRowColor']
+                : null,
+            headingRowHeight: namedArgs.containsKey('headingRowHeight')
+                ? namedArgs['headingRowHeight']
+                : null,
+            headingTextStyle: namedArgs.containsKey('headingTextStyle')
+                ? namedArgs['headingTextStyle']
+                : null,
+            horizontalMargin: namedArgs.containsKey('horizontalMargin')
+                ? namedArgs['horizontalMargin']
+                : null,
+            columnSpacing: namedArgs.containsKey('columnSpacing')
+                ? namedArgs['columnSpacing']
+                : null,
+            dividerThickness: namedArgs.containsKey('dividerThickness')
+                ? namedArgs['dividerThickness']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -103,9 +147,10 @@ class DataTableThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'DataTableTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => DataTableTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DataTableTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -119,7 +164,7 @@ extension DataTableThemeBinding on DataTableTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DataTableTheme');
+        return const HTType('DataTableTheme');
       case 'data':
         return data;
       case 'child':
@@ -129,31 +174,44 @@ extension DataTableThemeBinding on DataTableTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/date.g.dart b/lib/bindings/flutter/material/date.g.dart
index b540e5f..9464f92 100644
--- a/lib/bindings/flutter/material/date.g.dart
+++ b/lib/bindings/flutter/material/date.g.dart
@@ -14,7 +14,7 @@ class DatePickerEntryModeAutoBinding extends HTExternalClass {
       case 'DatePickerEntryMode.input':
         return DatePickerEntryMode.input;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class DatePickerEntryModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DatePickerEntryMode');
+        return const HTType('DatePickerEntryMode');
       case 'index':
         return (instance as DatePickerEntryMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DatePickerEntryMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DatePickerEntryMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,7 +47,7 @@ class DatePickerModeAutoBinding extends HTExternalClass {
       case 'DatePickerMode.year':
         return DatePickerMode.year;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -54,13 +55,14 @@ class DatePickerModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DatePickerMode');
+        return const HTType('DatePickerMode');
       case 'index':
         return (instance as DatePickerMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DatePickerMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DatePickerMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -72,28 +74,36 @@ class DateUtilsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DateUtils.dateOnly':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateUtils.dateOnly(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateUtils.dateOnly(positionalArgs[0]);
       case 'DateUtils.datesOnly':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateUtils.datesOnly(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateUtils.datesOnly(positionalArgs[0]);
       case 'DateUtils.isSameDay':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateUtils.isSameDay(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateUtils.isSameDay(positionalArgs[0], positionalArgs[1]);
       case 'DateUtils.isSameMonth':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateUtils.isSameMonth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateUtils.isSameMonth(positionalArgs[0], positionalArgs[1]);
       case 'DateUtils.monthDelta':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateUtils.monthDelta(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateUtils.monthDelta(positionalArgs[0], positionalArgs[1]);
       case 'DateUtils.addMonthsToMonthDate':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            DateUtils.addMonthsToMonthDate(positionalArgs[0], positionalArgs[1]);
+            DateUtils.addMonthsToMonthDate(
+                positionalArgs[0], positionalArgs[1]);
       case 'DateUtils.addDaysToDate':
-        return ({positionalArgs, namedArgs, typeArgs}) => DateUtils.addDaysToDate(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DateUtils.addDaysToDate(positionalArgs[0], positionalArgs[1]);
       case 'DateUtils.firstDayOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            DateUtils.firstDayOffset(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            DateUtils.firstDayOffset(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'DateUtils.getDaysInMonth':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             DateUtils.getDaysInMonth(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -108,7 +118,7 @@ class DateTimeRangeAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             DateTimeRange(start: namedArgs['start'], end: namedArgs['end']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -122,7 +132,7 @@ extension DateTimeRangeBinding on DateTimeRange {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DateTimeRange');
+        return const HTType('DateTimeRange');
       case 'start':
         return start;
       case 'end':
@@ -134,7 +144,7 @@ extension DateTimeRangeBinding on DateTimeRange {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/dialog.g.dart b/lib/bindings/flutter/material/dialog.g.dart
index 9da69a7..043e26e 100644
--- a/lib/bindings/flutter/material/dialog.g.dart
+++ b/lib/bindings/flutter/material/dialog.g.dart
@@ -4,7 +4,8 @@ import 'dart:ui';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 
-const _defaultInsetPadding = EdgeInsets.symmetric(horizontal: 40.0, vertical: 24.0);
+const _defaultInsetPadding =
+    EdgeInsets.symmetric(horizontal: 40.0, vertical: 24.0);
 
 class DialogAutoBinding extends HTExternalClass {
   DialogAutoBinding() : super('Dialog');
@@ -15,19 +16,29 @@ class DialogAutoBinding extends HTExternalClass {
       case 'Dialog':
         return ({positionalArgs, namedArgs, typeArgs}) => Dialog(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            insetAnimationDuration: namedArgs.containsKey('insetAnimationDuration')
-                ? namedArgs['insetAnimationDuration']
-                : const Duration(milliseconds: 100),
-            insetAnimationCurve:
-                namedArgs.containsKey('insetAnimationCurve') ? namedArgs['insetAnimationCurve'] : Curves.decelerate,
-            insetPadding: namedArgs.containsKey('insetPadding') ? namedArgs['insetPadding'] : _defaultInsetPadding,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            insetAnimationDuration:
+                namedArgs.containsKey('insetAnimationDuration')
+                    ? namedArgs['insetAnimationDuration']
+                    : const Duration(milliseconds: 100),
+            insetAnimationCurve: namedArgs.containsKey('insetAnimationCurve')
+                ? namedArgs['insetAnimationCurve']
+                : Curves.decelerate,
+            insetPadding: namedArgs.containsKey('insetPadding')
+                ? namedArgs['insetPadding']
+                : _defaultInsetPadding,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -41,7 +52,7 @@ extension DialogBinding on Dialog {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Dialog');
+        return const HTType('Dialog');
       case 'backgroundColor':
         return backgroundColor;
       case 'elevation':
@@ -63,31 +74,44 @@ extension DialogBinding on Dialog {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -102,30 +126,58 @@ class AlertDialogAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => AlertDialog(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            titlePadding: namedArgs.containsKey('titlePadding') ? namedArgs['titlePadding'] : null,
-            titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
-            content: namedArgs.containsKey('content') ? namedArgs['content'] : null,
+            titlePadding: namedArgs.containsKey('titlePadding')
+                ? namedArgs['titlePadding']
+                : null,
+            titleTextStyle: namedArgs.containsKey('titleTextStyle')
+                ? namedArgs['titleTextStyle']
+                : null,
+            content:
+                namedArgs.containsKey('content') ? namedArgs['content'] : null,
             contentPadding: namedArgs.containsKey('contentPadding')
                 ? namedArgs['contentPadding']
                 : const EdgeInsets.fromLTRB(24.0, 20.0, 24.0, 24.0),
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null,
-            actions: namedArgs.containsKey('actions') ? List<Widget>.from(namedArgs['actions']) : null,
-            actionsPadding: namedArgs.containsKey('actionsPadding') ? namedArgs['actionsPadding'] : EdgeInsets.zero,
+            contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                ? namedArgs['contentTextStyle']
+                : null,
+            actions: namedArgs.containsKey('actions')
+                ? List<Widget>.from(namedArgs['actions'])
+                : null,
+            actionsPadding: namedArgs.containsKey('actionsPadding')
+                ? namedArgs['actionsPadding']
+                : EdgeInsets.zero,
             actionsOverflowDirection:
-                namedArgs.containsKey('actionsOverflowDirection') ? namedArgs['actionsOverflowDirection'] : null,
-            actionsOverflowButtonSpacing: namedArgs.containsKey('actionsOverflowButtonSpacing')
-                ? namedArgs['actionsOverflowButtonSpacing']
+                namedArgs.containsKey('actionsOverflowDirection')
+                    ? namedArgs['actionsOverflowDirection']
+                    : null,
+            actionsOverflowButtonSpacing:
+                namedArgs.containsKey('actionsOverflowButtonSpacing')
+                    ? namedArgs['actionsOverflowButtonSpacing']
+                    : null,
+            buttonPadding: namedArgs.containsKey('buttonPadding')
+                ? namedArgs['buttonPadding']
                 : null,
-            buttonPadding: namedArgs.containsKey('buttonPadding') ? namedArgs['buttonPadding'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            insetPadding: namedArgs.containsKey('insetPadding') ? namedArgs['insetPadding'] : _defaultInsetPadding,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            insetPadding: namedArgs.containsKey('insetPadding')
+                ? namedArgs['insetPadding']
+                : _defaultInsetPadding,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            scrollable: namedArgs.containsKey('scrollable') ? namedArgs['scrollable'] : false);
+            scrollable: namedArgs.containsKey('scrollable')
+                ? namedArgs['scrollable']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -139,7 +191,7 @@ extension AlertDialogBinding on AlertDialog {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AlertDialog');
+        return const HTType('AlertDialog');
       case 'title':
         return title;
       case 'titlePadding':
@@ -179,31 +231,44 @@ extension AlertDialogBinding on AlertDialog {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -217,11 +282,14 @@ class SimpleDialogOptionAutoBinding extends HTExternalClass {
       case 'SimpleDialogOption':
         return ({positionalArgs, namedArgs, typeArgs}) => SimpleDialogOption(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            onPressed: namedArgs.containsKey('onPressed')
+                ? namedArgs['onPressed']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -232,7 +300,8 @@ class SimpleDialogOptionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -241,7 +310,7 @@ extension SimpleDialogOptionBinding on SimpleDialogOption {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SimpleDialogOption');
+        return const HTType('SimpleDialogOption');
       case 'onPressed':
         return onPressed;
       case 'child':
@@ -253,31 +322,44 @@ extension SimpleDialogOptionBinding on SimpleDialogOption {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -295,19 +377,33 @@ class SimpleDialogAutoBinding extends HTExternalClass {
             titlePadding: namedArgs.containsKey('titlePadding')
                 ? namedArgs['titlePadding']
                 : const EdgeInsets.fromLTRB(24.0, 24.0, 24.0, 0.0),
-            titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
+            titleTextStyle: namedArgs.containsKey('titleTextStyle')
+                ? namedArgs['titleTextStyle']
+                : null,
             contentPadding: namedArgs.containsKey('contentPadding')
                 ? namedArgs['contentPadding']
                 : const EdgeInsets.fromLTRB(0.0, 12.0, 0.0, 16.0),
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            insetPadding: namedArgs.containsKey('insetPadding') ? namedArgs['insetPadding'] : _defaultInsetPadding,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            insetPadding: namedArgs.containsKey('insetPadding')
+                ? namedArgs['insetPadding']
+                : _defaultInsetPadding,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : null);
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -321,7 +417,7 @@ extension SimpleDialogBinding on SimpleDialog {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SimpleDialog');
+        return const HTType('SimpleDialog');
       case 'title':
         return title;
       case 'titlePadding':
@@ -349,31 +445,44 @@ extension SimpleDialogBinding on SimpleDialog {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/dialog_theme.g.dart b/lib/bindings/flutter/material/dialog_theme.g.dart
index b901ce1..248fe82 100644
--- a/lib/bindings/flutter/material/dialog_theme.g.dart
+++ b/lib/bindings/flutter/material/dialog_theme.g.dart
@@ -11,18 +11,27 @@ class DialogThemeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DialogTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => DialogTheme(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null);
+            titleTextStyle: namedArgs.containsKey('titleTextStyle')
+                ? namedArgs['titleTextStyle']
+                : null,
+            contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                ? namedArgs['contentTextStyle']
+                : null);
       case 'DialogTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => DialogTheme.of(positionalArgs[0]);
-      case 'DialogTheme.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            DialogTheme.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            DialogTheme.of(positionalArgs[0]);
+      case 'DialogTheme.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => DialogTheme.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,7 +45,7 @@ extension DialogThemeBinding on DialogTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DialogTheme');
+        return const HTType('DialogTheme');
       case 'backgroundColor':
         return backgroundColor;
       case 'elevation':
@@ -51,24 +60,35 @@ extension DialogThemeBinding on DialogTheme {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            titleTextStyle: namedArgs.containsKey('titleTextStyle') ? namedArgs['titleTextStyle'] : null,
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null);
+            titleTextStyle: namedArgs.containsKey('titleTextStyle')
+                ? namedArgs['titleTextStyle']
+                : null,
+            contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                ? namedArgs['contentTextStyle']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/divider.g.dart b/lib/bindings/flutter/material/divider.g.dart
index a3d321e..d769a0a 100644
--- a/lib/bindings/flutter/material/divider.g.dart
+++ b/lib/bindings/flutter/material/divider.g.dart
@@ -11,17 +11,26 @@ class DividerAutoBinding extends HTExternalClass {
       case 'Divider':
         return ({positionalArgs, namedArgs, typeArgs}) => Divider(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            indent: namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
-            endIndent: namedArgs.containsKey('endIndent') ? namedArgs['endIndent'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            indent:
+                namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
+            endIndent: namedArgs.containsKey('endIndent')
+                ? namedArgs['endIndent']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null);
       case 'Divider.createBorderSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => Divider.createBorderSide(positionalArgs[0],
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            width: namedArgs.containsKey('width') ? namedArgs['width'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Divider.createBorderSide(positionalArgs[0],
+                color:
+                    namedArgs.containsKey('color') ? namedArgs['color'] : null,
+                width:
+                    namedArgs.containsKey('width') ? namedArgs['width'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +44,7 @@ extension DividerBinding on Divider {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Divider');
+        return const HTType('Divider');
       case 'height':
         return height;
       case 'thickness':
@@ -51,31 +60,44 @@ extension DividerBinding on Divider {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,12 +112,17 @@ class VerticalDividerAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => VerticalDivider(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            indent: namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
-            endIndent: namedArgs.containsKey('endIndent') ? namedArgs['endIndent'] : null,
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            indent:
+                namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
+            endIndent: namedArgs.containsKey('endIndent')
+                ? namedArgs['endIndent']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -109,7 +136,7 @@ extension VerticalDividerBinding on VerticalDivider {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VerticalDivider');
+        return const HTType('VerticalDivider');
       case 'width':
         return width;
       case 'thickness':
@@ -125,31 +152,44 @@ extension VerticalDividerBinding on VerticalDivider {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/divider_theme.g.dart b/lib/bindings/flutter/material/divider_theme.g.dart
index 22790c5..8968155 100644
--- a/lib/bindings/flutter/material/divider_theme.g.dart
+++ b/lib/bindings/flutter/material/divider_theme.g.dart
@@ -13,14 +13,19 @@ class DividerThemeDataAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => DividerThemeData(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             space: namedArgs.containsKey('space') ? namedArgs['space'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            indent: namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
-            endIndent: namedArgs.containsKey('endIndent') ? namedArgs['endIndent'] : null);
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            indent:
+                namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
+            endIndent: namedArgs.containsKey('endIndent')
+                ? namedArgs['endIndent']
+                : null);
       case 'DividerThemeData.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            DividerThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => DividerThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +39,7 @@ extension DividerThemeDataBinding on DividerThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DividerThemeData');
+        return const HTType('DividerThemeData');
       case 'color':
         return color;
       case 'space':
@@ -51,22 +56,30 @@ extension DividerThemeDataBinding on DividerThemeData {
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             space: namedArgs.containsKey('space') ? namedArgs['space'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            indent: namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
-            endIndent: namedArgs.containsKey('endIndent') ? namedArgs['endIndent'] : null);
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            indent:
+                namedArgs.containsKey('indent') ? namedArgs['indent'] : null,
+            endIndent: namedArgs.containsKey('endIndent')
+                ? namedArgs['endIndent']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -83,9 +96,10 @@ class DividerThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'DividerTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => DividerTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DividerTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -99,7 +113,7 @@ extension DividerThemeBinding on DividerTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DividerTheme');
+        return const HTType('DividerTheme');
       case 'data':
         return data;
       case 'child':
@@ -109,33 +123,47 @@ extension DividerThemeBinding on DividerTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/drawer.g.dart b/lib/bindings/flutter/material/drawer.g.dart
index 30d1451..1ecba25 100644
--- a/lib/bindings/flutter/material/drawer.g.dart
+++ b/lib/bindings/flutter/material/drawer.g.dart
@@ -17,7 +17,7 @@ class DrawerAlignmentAutoBinding extends HTExternalClass {
       case 'DrawerAlignment.end':
         return DrawerAlignment.end;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class DrawerAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DrawerAlignment');
+        return const HTType('DrawerAlignment');
       case 'index':
         return (instance as DrawerAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DrawerAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DrawerAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,11 +46,15 @@ class DrawerAutoBinding extends HTExternalClass {
       case 'Drawer':
         return ({positionalArgs, namedArgs, typeArgs}) => Drawer(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 16.0,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 16.0,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null);
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,7 +68,7 @@ extension DrawerBinding on Drawer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Drawer');
+        return const HTType('Drawer');
       case 'elevation':
         return elevation;
       case 'child':
@@ -75,31 +80,44 @@ extension DrawerBinding on Drawer {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -115,16 +133,27 @@ class DrawerControllerAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
             alignment: namedArgs['alignment'],
-            isDrawerOpen: namedArgs.containsKey('isDrawerOpen') ? namedArgs['isDrawerOpen'] : false,
-            drawerCallback: namedArgs.containsKey('drawerCallback') ? namedArgs['drawerCallback'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            scrimColor: namedArgs.containsKey('scrimColor') ? namedArgs['scrimColor'] : null,
-            edgeDragWidth: namedArgs.containsKey('edgeDragWidth') ? namedArgs['edgeDragWidth'] : null,
+            isDrawerOpen: namedArgs.containsKey('isDrawerOpen')
+                ? namedArgs['isDrawerOpen']
+                : false,
+            drawerCallback: namedArgs.containsKey('drawerCallback')
+                ? namedArgs['drawerCallback']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            scrimColor: namedArgs.containsKey('scrimColor')
+                ? namedArgs['scrimColor']
+                : null,
+            edgeDragWidth: namedArgs.containsKey('edgeDragWidth')
+                ? namedArgs['edgeDragWidth']
+                : null,
             enableOpenDragGesture:
-                namedArgs.containsKey('enableOpenDragGesture') ? namedArgs['enableOpenDragGesture'] : true);
+                namedArgs.containsKey('enableOpenDragGesture')
+                    ? namedArgs['enableOpenDragGesture']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -135,8 +164,8 @@ class DrawerControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DrawerCallback': (HTFunction function) =>
-          (isOpened) => function.call(positionalArgs: [isOpened], namedArgs: const {}),
+      'DrawerCallback': (HTFunction function) => (isOpened) =>
+          function.call(positionalArgs: [isOpened], namedArgs: const {}),
     };
   }
 }
@@ -145,7 +174,7 @@ extension DrawerControllerBinding on DrawerController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DrawerController');
+        return const HTType('DrawerController');
       case 'child':
         return child;
       case 'alignment':
@@ -173,25 +202,37 @@ extension DrawerControllerBinding on DrawerController {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -203,9 +244,10 @@ class DrawerControllerStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DrawerControllerState':
-        return ({positionalArgs, namedArgs, typeArgs}) => DrawerControllerState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DrawerControllerState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -216,8 +258,8 @@ class DrawerControllerStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -226,7 +268,7 @@ extension DrawerControllerStateBinding on DrawerControllerState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DrawerControllerState');
+        return const HTType('DrawerControllerState');
       case 'widget':
         return widget;
       case 'context':
@@ -238,30 +280,37 @@ extension DrawerControllerStateBinding on DrawerControllerState {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'open':
         return ({positionalArgs, namedArgs, typeArgs}) => open();
       case 'close':
         return ({positionalArgs, namedArgs, typeArgs}) => close();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/drawer_header.g.dart b/lib/bindings/flutter/material/drawer_header.g.dart
index 36b9e98..f1220ac 100644
--- a/lib/bindings/flutter/material/drawer_header.g.dart
+++ b/lib/bindings/flutter/material/drawer_header.g.dart
@@ -11,16 +11,24 @@ class DrawerHeaderAutoBinding extends HTExternalClass {
       case 'DrawerHeader':
         return ({positionalArgs, namedArgs, typeArgs}) => DrawerHeader(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : const EdgeInsets.only(bottom: 8.0),
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            margin: namedArgs.containsKey('margin')
+                ? namedArgs['margin']
+                : const EdgeInsets.only(bottom: 8.0),
             padding: namedArgs.containsKey('padding')
                 ? namedArgs['padding']
                 : const EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 8.0),
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : const Duration(milliseconds: 250),
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.fastOutSlowIn,
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : const Duration(milliseconds: 250),
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.fastOutSlowIn,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +42,7 @@ extension DrawerHeaderBinding on DrawerHeader {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DrawerHeader');
+        return const HTType('DrawerHeader');
       case 'decoration':
         return decoration;
       case 'padding':
@@ -52,31 +60,44 @@ extension DrawerHeaderBinding on DrawerHeader {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/dropdown.g.dart b/lib/bindings/flutter/material/dropdown.g.dart
index 7c5318b..fdd0afe 100644
--- a/lib/bindings/flutter/material/dropdown.g.dart
+++ b/lib/bindings/flutter/material/dropdown.g.dart
@@ -5,18 +5,22 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 
 class DropdownButtonHideUnderlineAutoBinding extends HTExternalClass {
-  DropdownButtonHideUnderlineAutoBinding() : super('DropdownButtonHideUnderline');
+  DropdownButtonHideUnderlineAutoBinding()
+      : super('DropdownButtonHideUnderline');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DropdownButtonHideUnderline':
-        return ({positionalArgs, namedArgs, typeArgs}) => DropdownButtonHideUnderline(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null, child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DropdownButtonHideUnderline(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child']);
       case 'DropdownButtonHideUnderline.at':
-        return ({positionalArgs, namedArgs, typeArgs}) => DropdownButtonHideUnderline.at(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DropdownButtonHideUnderline.at(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +34,7 @@ extension DropdownButtonHideUnderlineBinding on DropdownButtonHideUnderline {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DropdownButtonHideUnderline');
+        return const HTType('DropdownButtonHideUnderline');
       case 'child':
         return child;
       case 'key':
@@ -38,31 +42,44 @@ extension DropdownButtonHideUnderlineBinding on DropdownButtonHideUnderline {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/elevated_button.g.dart b/lib/bindings/flutter/material/elevated_button.g.dart
index 72a7ce3..9f9631b 100644
--- a/lib/bindings/flutter/material/elevated_button.g.dart
+++ b/lib/bindings/flutter/material/elevated_button.g.dart
@@ -15,44 +15,93 @@ class ElevatedButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ElevatedButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             child: namedArgs['child']);
       case 'ElevatedButton.icon':
         return ({positionalArgs, namedArgs, typeArgs}) => ElevatedButton.icon(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
             icon: namedArgs['icon'],
             label: namedArgs['label']);
       case 'ElevatedButton.styleFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => ElevatedButton.styleFrom(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            onPrimary: namedArgs.containsKey('onPrimary') ? namedArgs['onPrimary'] : null,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            minimumSize: namedArgs.containsKey('minimumSize') ? namedArgs['minimumSize'] : null,
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            enabledMouseCursor: namedArgs.containsKey('enabledMouseCursor') ? namedArgs['enabledMouseCursor'] : null,
-            disabledMouseCursor: namedArgs.containsKey('disabledMouseCursor') ? namedArgs['disabledMouseCursor'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            tapTargetSize: namedArgs.containsKey('tapTargetSize') ? namedArgs['tapTargetSize'] : null,
-            animationDuration: namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ElevatedButton.styleFrom(
+                primary: namedArgs.containsKey('primary')
+                    ? namedArgs['primary']
+                    : null,
+                onPrimary: namedArgs.containsKey('onPrimary')
+                    ? namedArgs['onPrimary']
+                    : null,
+                onSurface: namedArgs.containsKey('onSurface')
+                    ? namedArgs['onSurface']
+                    : null,
+                shadowColor: namedArgs.containsKey('shadowColor')
+                    ? namedArgs['shadowColor']
+                    : null,
+                elevation: namedArgs.containsKey('elevation')
+                    ? namedArgs['elevation']
+                    : null,
+                textStyle: namedArgs.containsKey('textStyle')
+                    ? namedArgs['textStyle']
+                    : null,
+                padding: namedArgs.containsKey('padding')
+                    ? namedArgs['padding']
+                    : null,
+                minimumSize: namedArgs.containsKey('minimumSize')
+                    ? namedArgs['minimumSize']
+                    : null,
+                side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
+                shape:
+                    namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
+                enabledMouseCursor: namedArgs.containsKey('enabledMouseCursor')
+                    ? namedArgs['enabledMouseCursor']
+                    : null,
+                disabledMouseCursor:
+                    namedArgs.containsKey('disabledMouseCursor')
+                        ? namedArgs['disabledMouseCursor']
+                        : null,
+                visualDensity: namedArgs.containsKey('visualDensity')
+                    ? namedArgs['visualDensity']
+                    : null,
+                tapTargetSize: namedArgs.containsKey('tapTargetSize')
+                    ? namedArgs['tapTargetSize']
+                    : null,
+                animationDuration: namedArgs.containsKey('animationDuration')
+                    ? namedArgs['animationDuration']
+                    : null,
+                enableFeedback: namedArgs.containsKey('enableFeedback')
+                    ? namedArgs['enableFeedback']
+                    : null,
+                alignment: namedArgs.containsKey('alignment')
+                    ? namedArgs['alignment']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,7 +112,8 @@ class ElevatedButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -72,7 +122,7 @@ extension ElevatedButtonBinding on ElevatedButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ElevatedButton');
+        return const HTType('ElevatedButton');
       case 'onPressed':
         return onPressed;
       case 'onLongPress':
@@ -94,35 +144,49 @@ extension ElevatedButtonBinding on ElevatedButton {
       case 'hashCode':
         return hashCode;
       case 'defaultStyleOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultStyleOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultStyleOf(positionalArgs[0]);
       case 'themeStyleOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => themeStyleOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            themeStyleOf(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/elevated_button_theme.g.dart b/lib/bindings/flutter/material/elevated_button_theme.g.dart
index 1b783f4..8f4723a 100644
--- a/lib/bindings/flutter/material/elevated_button_theme.g.dart
+++ b/lib/bindings/flutter/material/elevated_button_theme.g.dart
@@ -11,12 +11,15 @@ class ElevatedButtonThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ElevatedButtonThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ElevatedButtonThemeData(style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
+            ElevatedButtonThemeData(
+                style:
+                    namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'ElevatedButtonThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ElevatedButtonThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ElevatedButtonThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,24 +33,27 @@ extension ElevatedButtonThemeDataBinding on ElevatedButtonThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ElevatedButtonThemeData');
+        return const HTType('ElevatedButtonThemeData');
       case 'style':
         return style;
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -64,9 +70,10 @@ class ElevatedButtonThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'ElevatedButtonTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ElevatedButtonTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ElevatedButtonTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,7 +87,7 @@ extension ElevatedButtonThemeBinding on ElevatedButtonTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ElevatedButtonTheme');
+        return const HTType('ElevatedButtonTheme');
       case 'data':
         return data;
       case 'child':
@@ -90,33 +97,47 @@ extension ElevatedButtonThemeBinding on ElevatedButtonTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/elevation_overlay.g.dart b/lib/bindings/flutter/material/elevation_overlay.g.dart
index bc9c173..708940d 100644
--- a/lib/bindings/flutter/material/elevation_overlay.g.dart
+++ b/lib/bindings/flutter/material/elevation_overlay.g.dart
@@ -9,15 +9,17 @@ class ElevationOverlayAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ElevationOverlay.applyOverlay':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ElevationOverlay.applyOverlay(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ElevationOverlay.applyOverlay(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'ElevationOverlay.overlayColor':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             ElevationOverlay.overlayColor(positionalArgs[0], positionalArgs[1]);
       case 'ElevationOverlay.colorWithOverlay':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ElevationOverlay.colorWithOverlay(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ElevationOverlay.colorWithOverlay(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/expand_icon.g.dart b/lib/bindings/flutter/material/expand_icon.g.dart
index 05164cd..5212d09 100644
--- a/lib/bindings/flutter/material/expand_icon.g.dart
+++ b/lib/bindings/flutter/material/expand_icon.g.dart
@@ -11,15 +11,23 @@ class ExpandIconAutoBinding extends HTExternalClass {
       case 'ExpandIcon':
         return ({positionalArgs, namedArgs, typeArgs}) => ExpandIcon(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            isExpanded: namedArgs.containsKey('isExpanded') ? namedArgs['isExpanded'] : false,
+            isExpanded: namedArgs.containsKey('isExpanded')
+                ? namedArgs['isExpanded']
+                : false,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : 24.0,
             onPressed: namedArgs['onPressed'],
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : const EdgeInsets.all(8.0),
+            padding: namedArgs.containsKey('padding')
+                ? namedArgs['padding']
+                : const EdgeInsets.all(8.0),
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            expandedColor: namedArgs.containsKey('expandedColor') ? namedArgs['expandedColor'] : null);
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            expandedColor: namedArgs.containsKey('expandedColor')
+                ? namedArgs['expandedColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +41,7 @@ extension ExpandIconBinding on ExpandIcon {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExpandIcon');
+        return const HTType('ExpandIcon');
       case 'isExpanded':
         return isExpanded;
       case 'size':
@@ -59,25 +67,37 @@ extension ExpandIconBinding on ExpandIcon {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/expansion_panel.g.dart b/lib/bindings/flutter/material/expansion_panel.g.dart
index 10031d2..1ded012 100644
--- a/lib/bindings/flutter/material/expansion_panel.g.dart
+++ b/lib/bindings/flutter/material/expansion_panel.g.dart
@@ -4,7 +4,8 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 
 const _kPanelHeaderCollapsedHeight = kMinInteractiveDimension;
-const _kPanelHeaderExpandedDefaultPadding = EdgeInsets.symmetric(vertical: 64.0 - _kPanelHeaderCollapsedHeight);
+const _kPanelHeaderExpandedDefaultPadding =
+    EdgeInsets.symmetric(vertical: 64.0 - _kPanelHeaderCollapsedHeight);
 
 class ExpansionPanelAutoBinding extends HTExternalClass {
   ExpansionPanelAutoBinding() : super('ExpansionPanel');
@@ -16,11 +17,17 @@ class ExpansionPanelAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ExpansionPanel(
             headerBuilder: namedArgs['headerBuilder'],
             body: namedArgs['body'],
-            isExpanded: namedArgs.containsKey('isExpanded') ? namedArgs['isExpanded'] : false,
-            canTapOnHeader: namedArgs.containsKey('canTapOnHeader') ? namedArgs['canTapOnHeader'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null);
+            isExpanded: namedArgs.containsKey('isExpanded')
+                ? namedArgs['isExpanded']
+                : false,
+            canTapOnHeader: namedArgs.containsKey('canTapOnHeader')
+                ? namedArgs['canTapOnHeader']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +39,9 @@ class ExpansionPanelAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'ExpansionPanelHeaderBuilder': (HTFunction function) =>
-          (context, isExpanded) => function.call(positionalArgs: [context, isExpanded], namedArgs: const {}) as Widget,
+          (context, isExpanded) => function.call(
+              positionalArgs: [context, isExpanded],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -41,7 +50,7 @@ extension ExpansionPanelBinding on ExpansionPanel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExpansionPanel');
+        return const HTType('ExpansionPanel');
       case 'headerBuilder':
         return headerBuilder;
       case 'body':
@@ -53,7 +62,7 @@ extension ExpansionPanelBinding on ExpansionPanel {
       case 'backgroundColor':
         return backgroundColor;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -69,10 +78,14 @@ class ExpansionPanelRadioAutoBinding extends HTExternalClass {
             value: namedArgs['value'],
             headerBuilder: namedArgs['headerBuilder'],
             body: namedArgs['body'],
-            canTapOnHeader: namedArgs.containsKey('canTapOnHeader') ? namedArgs['canTapOnHeader'] : false,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null);
+            canTapOnHeader: namedArgs.containsKey('canTapOnHeader')
+                ? namedArgs['canTapOnHeader']
+                : false,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -84,7 +97,9 @@ class ExpansionPanelRadioAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'ExpansionPanelHeaderBuilder': (HTFunction function) =>
-          (context, isExpanded) => function.call(positionalArgs: [context, isExpanded], namedArgs: const {}) as Widget,
+          (context, isExpanded) => function.call(
+              positionalArgs: [context, isExpanded],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -93,7 +108,7 @@ extension ExpansionPanelRadioBinding on ExpansionPanelRadio {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExpansionPanelRadio');
+        return const HTType('ExpansionPanelRadio');
       case 'value':
         return value;
       case 'headerBuilder':
@@ -107,7 +122,7 @@ extension ExpansionPanelRadioBinding on ExpansionPanelRadio {
       case 'backgroundColor':
         return backgroundColor;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -124,32 +139,54 @@ class ExpansionPanelListAutoBinding extends HTExternalClass {
             children: namedArgs.containsKey('children')
                 ? List<ExpansionPanel>.from(namedArgs['children'])
                 : const <ExpansionPanel>[],
-            expansionCallback: namedArgs.containsKey('expansionCallback') ? namedArgs['expansionCallback'] : null,
-            animationDuration:
-                namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : kThemeAnimationDuration,
-            expandedHeaderPadding: namedArgs.containsKey('expandedHeaderPadding')
-                ? namedArgs['expandedHeaderPadding']
-                : _kPanelHeaderExpandedDefaultPadding,
-            dividerColor: namedArgs.containsKey('dividerColor') ? namedArgs['dividerColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 2);
+            expansionCallback: namedArgs.containsKey('expansionCallback')
+                ? namedArgs['expansionCallback']
+                : null,
+            animationDuration: namedArgs.containsKey('animationDuration')
+                ? namedArgs['animationDuration']
+                : kThemeAnimationDuration,
+            expandedHeaderPadding:
+                namedArgs.containsKey('expandedHeaderPadding')
+                    ? namedArgs['expandedHeaderPadding']
+                    : _kPanelHeaderExpandedDefaultPadding,
+            dividerColor: namedArgs.containsKey('dividerColor')
+                ? namedArgs['dividerColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 2);
       case 'ExpansionPanelList.radio':
-        return ({positionalArgs, namedArgs, typeArgs}) => ExpansionPanelList.radio(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            children: namedArgs.containsKey('children')
-                ? List<ExpansionPanel>.from(namedArgs['children'])
-                : const <ExpansionPanelRadio>[],
-            expansionCallback: namedArgs.containsKey('expansionCallback') ? namedArgs['expansionCallback'] : null,
-            animationDuration:
-                namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : kThemeAnimationDuration,
-            initialOpenPanelValue:
-                namedArgs.containsKey('initialOpenPanelValue') ? namedArgs['initialOpenPanelValue'] : null,
-            expandedHeaderPadding: namedArgs.containsKey('expandedHeaderPadding')
-                ? namedArgs['expandedHeaderPadding']
-                : _kPanelHeaderExpandedDefaultPadding,
-            dividerColor: namedArgs.containsKey('dividerColor') ? namedArgs['dividerColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 2);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ExpansionPanelList
+                .radio(
+                    key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                    children: namedArgs.containsKey('children')
+                        ? List<ExpansionPanel>.from(namedArgs['children'])
+                        : const <ExpansionPanelRadio>[],
+                    expansionCallback:
+                        namedArgs.containsKey('expansionCallback')
+                            ? namedArgs['expansionCallback']
+                            : null,
+                    animationDuration:
+                        namedArgs.containsKey('animationDuration')
+                            ? namedArgs['animationDuration']
+                            : kThemeAnimationDuration,
+                    initialOpenPanelValue:
+                        namedArgs.containsKey('initialOpenPanelValue')
+                            ? namedArgs['initialOpenPanelValue']
+                            : null,
+                    expandedHeaderPadding:
+                        namedArgs.containsKey('expandedHeaderPadding')
+                            ? namedArgs['expandedHeaderPadding']
+                            : _kPanelHeaderExpandedDefaultPadding,
+                    dividerColor: namedArgs.containsKey('dividerColor')
+                        ? namedArgs['dividerColor']
+                        : null,
+                    elevation: namedArgs.containsKey('elevation')
+                        ? namedArgs['elevation']
+                        : 2);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -161,7 +198,8 @@ class ExpansionPanelListAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'ExpansionPanelCallback': (HTFunction function) =>
-          (panelIndex, isExpanded) => function.call(positionalArgs: [panelIndex, isExpanded], namedArgs: const {}),
+          (panelIndex, isExpanded) => function.call(
+              positionalArgs: [panelIndex, isExpanded], namedArgs: const {}),
     };
   }
 }
@@ -170,7 +208,7 @@ extension ExpansionPanelListBinding on ExpansionPanelList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExpansionPanelList');
+        return const HTType('ExpansionPanelList');
       case 'children':
         return children;
       case 'expansionCallback':
@@ -196,25 +234,37 @@ extension ExpansionPanelListBinding on ExpansionPanelList {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/expansion_tile.g.dart b/lib/bindings/flutter/material/expansion_tile.g.dart
index dfbacd4..7450e72 100644
--- a/lib/bindings/flutter/material/expansion_tile.g.dart
+++ b/lib/bindings/flutter/material/expansion_tile.g.dart
@@ -11,24 +11,49 @@ class ExpansionTileAutoBinding extends HTExternalClass {
       case 'ExpansionTile':
         return ({positionalArgs, namedArgs, typeArgs}) => ExpansionTile(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
             title: namedArgs['title'],
-            subtitle: namedArgs.containsKey('subtitle') ? namedArgs['subtitle'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            onExpansionChanged: namedArgs.containsKey('onExpansionChanged') ? namedArgs['onExpansionChanged'] : null,
-            trailing: namedArgs.containsKey('trailing') ? namedArgs['trailing'] : null,
-            initiallyExpanded: namedArgs.containsKey('initiallyExpanded') ? namedArgs['initiallyExpanded'] : false,
-            maintainState: namedArgs.containsKey('maintainState') ? namedArgs['maintainState'] : false,
-            tilePadding: namedArgs.containsKey('tilePadding') ? namedArgs['tilePadding'] : null,
+            subtitle: namedArgs.containsKey('subtitle')
+                ? namedArgs['subtitle']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            onExpansionChanged: namedArgs.containsKey('onExpansionChanged')
+                ? namedArgs['onExpansionChanged']
+                : null,
+            trailing: namedArgs.containsKey('trailing')
+                ? namedArgs['trailing']
+                : null,
+            initiallyExpanded: namedArgs.containsKey('initiallyExpanded')
+                ? namedArgs['initiallyExpanded']
+                : false,
+            maintainState: namedArgs.containsKey('maintainState')
+                ? namedArgs['maintainState']
+                : false,
+            tilePadding: namedArgs.containsKey('tilePadding')
+                ? namedArgs['tilePadding']
+                : null,
             expandedCrossAxisAlignment:
-                namedArgs.containsKey('expandedCrossAxisAlignment') ? namedArgs['expandedCrossAxisAlignment'] : null,
-            expandedAlignment: namedArgs.containsKey('expandedAlignment') ? namedArgs['expandedAlignment'] : null,
-            childrenPadding: namedArgs.containsKey('childrenPadding') ? namedArgs['childrenPadding'] : null,
+                namedArgs.containsKey('expandedCrossAxisAlignment')
+                    ? namedArgs['expandedCrossAxisAlignment']
+                    : null,
+            expandedAlignment: namedArgs.containsKey('expandedAlignment')
+                ? namedArgs['expandedAlignment']
+                : null,
+            childrenPadding: namedArgs.containsKey('childrenPadding')
+                ? namedArgs['childrenPadding']
+                : null,
             collapsedBackgroundColor:
-                namedArgs.containsKey('collapsedBackgroundColor') ? namedArgs['collapsedBackgroundColor'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+                namedArgs.containsKey('collapsedBackgroundColor')
+                    ? namedArgs['collapsedBackgroundColor']
+                    : null,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -42,7 +67,7 @@ extension ExpansionTileBinding on ExpansionTile {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExpansionTile');
+        return const HTType('ExpansionTile');
       case 'leading':
         return leading;
       case 'title':
@@ -82,25 +107,37 @@ extension ExpansionTileBinding on ExpansionTile {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/feedback.g.dart b/lib/bindings/flutter/material/feedback.g.dart
index 4c6bc86..d4e1247 100644
--- a/lib/bindings/flutter/material/feedback.g.dart
+++ b/lib/bindings/flutter/material/feedback.g.dart
@@ -8,22 +8,26 @@ class FeedbackAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Feedback.forTap':
-        return ({positionalArgs, namedArgs, typeArgs}) => Feedback.forTap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Feedback.forTap(positionalArgs[0]);
       case 'Feedback.wrapForTap':
-        return ({positionalArgs, namedArgs, typeArgs}) => Feedback.wrapForTap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Feedback.wrapForTap(positionalArgs[0], positionalArgs[1]);
       case 'Feedback.forLongPress':
-        return ({positionalArgs, namedArgs, typeArgs}) => Feedback.forLongPress(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Feedback.forLongPress(positionalArgs[0]);
       case 'Feedback.wrapForLongPress':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Feedback.wrapForLongPress(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
       'GestureLongPressCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
diff --git a/lib/bindings/flutter/material/flexible_space_bar.g.dart b/lib/bindings/flutter/material/flexible_space_bar.g.dart
index f6c2a7b..ad8c5fb 100644
--- a/lib/bindings/flutter/material/flexible_space_bar.g.dart
+++ b/lib/bindings/flutter/material/flexible_space_bar.g.dart
@@ -18,7 +18,7 @@ class CollapseModeAutoBinding extends HTExternalClass {
       case 'CollapseMode.none':
         return CollapseMode.none;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class CollapseModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CollapseMode');
+        return const HTType('CollapseMode');
       case 'index':
         return (instance as CollapseMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as CollapseMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as CollapseMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -52,7 +53,7 @@ class StretchModeAutoBinding extends HTExternalClass {
       case 'StretchMode.fadeTitle':
         return StretchMode.fadeTitle;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -60,13 +61,14 @@ class StretchModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StretchMode');
+        return const HTType('StretchMode');
       case 'index':
         return (instance as StretchMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as StretchMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as StretchMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -81,22 +83,40 @@ class FlexibleSpaceBarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => FlexibleSpaceBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : null,
-            centerTitle: namedArgs.containsKey('centerTitle') ? namedArgs['centerTitle'] : null,
-            titlePadding: namedArgs.containsKey('titlePadding') ? namedArgs['titlePadding'] : null,
-            collapseMode: namedArgs.containsKey('collapseMode') ? namedArgs['collapseMode'] : CollapseMode.parallax,
+            background: namedArgs.containsKey('background')
+                ? namedArgs['background']
+                : null,
+            centerTitle: namedArgs.containsKey('centerTitle')
+                ? namedArgs['centerTitle']
+                : null,
+            titlePadding: namedArgs.containsKey('titlePadding')
+                ? namedArgs['titlePadding']
+                : null,
+            collapseMode: namedArgs.containsKey('collapseMode')
+                ? namedArgs['collapseMode']
+                : CollapseMode.parallax,
             stretchModes: namedArgs.containsKey('stretchModes')
                 ? List<StretchMode>.from(namedArgs['stretchModes'])
                 : const <StretchMode>[StretchMode.zoomBackground]);
       case 'FlexibleSpaceBar.createSettings':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlexibleSpaceBar.createSettings(
-            toolbarOpacity: namedArgs.containsKey('toolbarOpacity') ? namedArgs['toolbarOpacity'] : null,
-            minExtent: namedArgs.containsKey('minExtent') ? namedArgs['minExtent'] : null,
-            maxExtent: namedArgs.containsKey('maxExtent') ? namedArgs['maxExtent'] : null,
-            currentExtent: namedArgs.containsKey('currentExtent') ? namedArgs['currentExtent'] : null,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlexibleSpaceBar.createSettings(
+                toolbarOpacity: namedArgs.containsKey('toolbarOpacity')
+                    ? namedArgs['toolbarOpacity']
+                    : null,
+                minExtent: namedArgs.containsKey('minExtent')
+                    ? namedArgs['minExtent']
+                    : null,
+                maxExtent: namedArgs.containsKey('maxExtent')
+                    ? namedArgs['maxExtent']
+                    : null,
+                currentExtent: namedArgs.containsKey('currentExtent')
+                    ? namedArgs['currentExtent']
+                    : null,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,7 +130,7 @@ extension FlexibleSpaceBarBinding on FlexibleSpaceBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlexibleSpaceBar');
+        return const HTType('FlexibleSpaceBar');
       case 'title':
         return title;
       case 'background':
@@ -134,25 +154,37 @@ extension FlexibleSpaceBarBinding on FlexibleSpaceBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -164,15 +196,16 @@ class FlexibleSpaceBarSettingsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlexibleSpaceBarSettings':
-        return ({positionalArgs, namedArgs, typeArgs}) => FlexibleSpaceBarSettings(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            toolbarOpacity: namedArgs['toolbarOpacity'],
-            minExtent: namedArgs['minExtent'],
-            maxExtent: namedArgs['maxExtent'],
-            currentExtent: namedArgs['currentExtent'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FlexibleSpaceBarSettings(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                toolbarOpacity: namedArgs['toolbarOpacity'],
+                minExtent: namedArgs['minExtent'],
+                maxExtent: namedArgs['maxExtent'],
+                currentExtent: namedArgs['currentExtent'],
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -186,7 +219,7 @@ extension FlexibleSpaceBarSettingsBinding on FlexibleSpaceBarSettings {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlexibleSpaceBarSettings');
+        return const HTType('FlexibleSpaceBarSettings');
       case 'toolbarOpacity':
         return toolbarOpacity;
       case 'minExtent':
@@ -202,31 +235,44 @@ extension FlexibleSpaceBarSettingsBinding on FlexibleSpaceBarSettings {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/floating_action_button.g.dart b/lib/bindings/flutter/material/floating_action_button.g.dart
index 570a8c4..c834504 100644
--- a/lib/bindings/flutter/material/floating_action_button.g.dart
+++ b/lib/bindings/flutter/material/floating_action_button.g.dart
@@ -21,56 +21,134 @@ class FloatingActionButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => FloatingActionButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            heroTag: namedArgs.containsKey('heroTag') ? namedArgs['heroTag'] : const _DefaultHeroTag(),
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            focusElevation: namedArgs.containsKey('focusElevation') ? namedArgs['focusElevation'] : null,
-            hoverElevation: namedArgs.containsKey('hoverElevation') ? namedArgs['hoverElevation'] : null,
-            highlightElevation: namedArgs.containsKey('highlightElevation') ? namedArgs['highlightElevation'] : null,
-            disabledElevation: namedArgs.containsKey('disabledElevation') ? namedArgs['disabledElevation'] : null,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            heroTag: namedArgs.containsKey('heroTag')
+                ? namedArgs['heroTag']
+                : const _DefaultHeroTag(),
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            focusElevation: namedArgs.containsKey('focusElevation')
+                ? namedArgs['focusElevation']
+                : null,
+            hoverElevation: namedArgs.containsKey('hoverElevation')
+                ? namedArgs['hoverElevation']
+                : null,
+            highlightElevation: namedArgs.containsKey('highlightElevation')
+                ? namedArgs['highlightElevation']
+                : null,
+            disabledElevation: namedArgs.containsKey('disabledElevation')
+                ? namedArgs['disabledElevation']
+                : null,
             onPressed: namedArgs['onPressed'],
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
             mini: namedArgs.containsKey('mini') ? namedArgs['mini'] : false,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            isExtended: namedArgs.containsKey('isExtended') ? namedArgs['isExtended'] : false);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            isExtended: namedArgs.containsKey('isExtended')
+                ? namedArgs['isExtended']
+                : false);
       case 'FloatingActionButton.extended':
-        return ({positionalArgs, namedArgs, typeArgs}) => FloatingActionButton.extended(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            heroTag: namedArgs.containsKey('heroTag') ? namedArgs['heroTag'] : const _DefaultHeroTag(),
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            focusElevation: namedArgs.containsKey('focusElevation') ? namedArgs['focusElevation'] : null,
-            hoverElevation: namedArgs.containsKey('hoverElevation') ? namedArgs['hoverElevation'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            highlightElevation: namedArgs.containsKey('highlightElevation') ? namedArgs['highlightElevation'] : null,
-            disabledElevation: namedArgs.containsKey('disabledElevation') ? namedArgs['disabledElevation'] : null,
-            onPressed: namedArgs['onPressed'],
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : SystemMouseCursors.click,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            isExtended: namedArgs.containsKey('isExtended') ? namedArgs['isExtended'] : true,
-            materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            icon: namedArgs.containsKey('icon') ? namedArgs['icon'] : null,
-            label: namedArgs['label']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FloatingActionButton
+                .extended(
+                    key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                    tooltip: namedArgs.containsKey('tooltip')
+                        ? namedArgs['tooltip']
+                        : null,
+                    foregroundColor: namedArgs.containsKey('foregroundColor')
+                        ? namedArgs['foregroundColor']
+                        : null,
+                    backgroundColor: namedArgs.containsKey('backgroundColor')
+                        ? namedArgs['backgroundColor']
+                        : null,
+                    focusColor: namedArgs.containsKey('focusColor')
+                        ? namedArgs['focusColor']
+                        : null,
+                    hoverColor: namedArgs.containsKey('hoverColor')
+                        ? namedArgs['hoverColor']
+                        : null,
+                    heroTag: namedArgs.containsKey('heroTag')
+                        ? namedArgs['heroTag']
+                        : const _DefaultHeroTag(),
+                    elevation: namedArgs.containsKey('elevation')
+                        ? namedArgs['elevation']
+                        : null,
+                    focusElevation: namedArgs.containsKey('focusElevation')
+                        ? namedArgs['focusElevation']
+                        : null,
+                    hoverElevation: namedArgs.containsKey('hoverElevation')
+                        ? namedArgs['hoverElevation']
+                        : null,
+                    splashColor: namedArgs.containsKey('splashColor')
+                        ? namedArgs['splashColor']
+                        : null,
+                    highlightElevation:
+                        namedArgs.containsKey('highlightElevation')
+                            ? namedArgs['highlightElevation']
+                            : null,
+                    disabledElevation: namedArgs.containsKey('disabledElevation')
+                        ? namedArgs['disabledElevation']
+                        : null,
+                    onPressed: namedArgs['onPressed'],
+                    mouseCursor: namedArgs.containsKey('mouseCursor')
+                        ? namedArgs['mouseCursor']
+                        : SystemMouseCursors.click,
+                    shape: namedArgs.containsKey('shape')
+                        ? namedArgs['shape']
+                        : null,
+                    isExtended: namedArgs.containsKey('isExtended')
+                        ? namedArgs['isExtended']
+                        : true,
+                    materialTapTargetSize:
+                        namedArgs.containsKey('materialTapTargetSize')
+                            ? namedArgs['materialTapTargetSize']
+                            : null,
+                    clipBehavior: namedArgs.containsKey('clipBehavior')
+                        ? namedArgs['clipBehavior']
+                        : Clip.none,
+                    focusNode: namedArgs.containsKey('focusNode')
+                        ? namedArgs['focusNode']
+                        : null,
+                    autofocus: namedArgs.containsKey('autofocus')
+                        ? namedArgs['autofocus']
+                        : false,
+                    icon: namedArgs.containsKey('icon')
+                        ? namedArgs['icon']
+                        : null,
+                    label: namedArgs['label']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -81,7 +159,8 @@ class FloatingActionButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -90,7 +169,7 @@ extension FloatingActionButtonBinding on FloatingActionButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FloatingActionButton');
+        return const HTType('FloatingActionButton');
       case 'child':
         return child;
       case 'tooltip':
@@ -140,31 +219,44 @@ extension FloatingActionButtonBinding on FloatingActionButton {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/floating_action_button_theme.g.dart b/lib/bindings/flutter/material/floating_action_button_theme.g.dart
index 8ce8b37..408c95a 100644
--- a/lib/bindings/flutter/material/floating_action_button_theme.g.dart
+++ b/lib/bindings/flutter/material/floating_action_button_theme.g.dart
@@ -4,29 +4,53 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart';
 
 class FloatingActionButtonThemeDataAutoBinding extends HTExternalClass {
-  FloatingActionButtonThemeDataAutoBinding() : super('FloatingActionButtonThemeData');
+  FloatingActionButtonThemeDataAutoBinding()
+      : super('FloatingActionButtonThemeData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FloatingActionButtonThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => FloatingActionButtonThemeData(
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            focusElevation: namedArgs.containsKey('focusElevation') ? namedArgs['focusElevation'] : null,
-            hoverElevation: namedArgs.containsKey('hoverElevation') ? namedArgs['hoverElevation'] : null,
-            disabledElevation: namedArgs.containsKey('disabledElevation') ? namedArgs['disabledElevation'] : null,
-            highlightElevation: namedArgs.containsKey('highlightElevation') ? namedArgs['highlightElevation'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FloatingActionButtonThemeData(
+                foregroundColor: namedArgs.containsKey('foregroundColor')
+                    ? namedArgs['foregroundColor']
+                    : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                focusColor: namedArgs.containsKey('focusColor')
+                    ? namedArgs['focusColor']
+                    : null,
+                hoverColor: namedArgs.containsKey('hoverColor')
+                    ? namedArgs['hoverColor']
+                    : null,
+                splashColor: namedArgs.containsKey('splashColor')
+                    ? namedArgs['splashColor']
+                    : null,
+                elevation: namedArgs.containsKey('elevation')
+                    ? namedArgs['elevation']
+                    : null,
+                focusElevation: namedArgs.containsKey('focusElevation')
+                    ? namedArgs['focusElevation']
+                    : null,
+                hoverElevation: namedArgs.containsKey('hoverElevation')
+                    ? namedArgs['hoverElevation']
+                    : null,
+                disabledElevation: namedArgs.containsKey('disabledElevation')
+                    ? namedArgs['disabledElevation']
+                    : null,
+                highlightElevation: namedArgs.containsKey('highlightElevation')
+                    ? namedArgs['highlightElevation']
+                    : null,
+                shape:
+                    namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
       case 'FloatingActionButtonThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FloatingActionButtonThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            FloatingActionButtonThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,11 +60,12 @@ class FloatingActionButtonThemeDataAutoBinding extends HTExternalClass {
   }
 }
 
-extension FloatingActionButtonThemeDataBinding on FloatingActionButtonThemeData {
+extension FloatingActionButtonThemeDataBinding
+    on FloatingActionButtonThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FloatingActionButtonThemeData');
+        return const HTType('FloatingActionButtonThemeData');
       case 'foregroundColor':
         return foregroundColor;
       case 'backgroundColor':
@@ -67,30 +92,53 @@ extension FloatingActionButtonThemeDataBinding on FloatingActionButtonThemeData
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            foregroundColor: namedArgs.containsKey('foregroundColor') ? namedArgs['foregroundColor'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            focusElevation: namedArgs.containsKey('focusElevation') ? namedArgs['focusElevation'] : null,
-            hoverElevation: namedArgs.containsKey('hoverElevation') ? namedArgs['hoverElevation'] : null,
-            disabledElevation: namedArgs.containsKey('disabledElevation') ? namedArgs['disabledElevation'] : null,
-            highlightElevation: namedArgs.containsKey('highlightElevation') ? namedArgs['highlightElevation'] : null,
+            foregroundColor: namedArgs.containsKey('foregroundColor')
+                ? namedArgs['foregroundColor']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            focusElevation: namedArgs.containsKey('focusElevation')
+                ? namedArgs['focusElevation']
+                : null,
+            hoverElevation: namedArgs.containsKey('hoverElevation')
+                ? namedArgs['hoverElevation']
+                : null,
+            disabledElevation: namedArgs.containsKey('disabledElevation')
+                ? namedArgs['disabledElevation']
+                : null,
+            highlightElevation: namedArgs.containsKey('highlightElevation')
+                ? namedArgs['highlightElevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/flutter_logo.g.dart b/lib/bindings/flutter/material/flutter_logo.g.dart
index 67be101..8db678f 100644
--- a/lib/bindings/flutter/material/flutter_logo.g.dart
+++ b/lib/bindings/flutter/material/flutter_logo.g.dart
@@ -12,12 +12,20 @@ class FlutterLogoAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => FlutterLogo(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            textColor: namedArgs.containsKey('textColor') ? namedArgs['textColor'] : const Color(0xFF757575),
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : FlutterLogoStyle.markOnly,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : const Duration(milliseconds: 750),
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.fastOutSlowIn);
+            textColor: namedArgs.containsKey('textColor')
+                ? namedArgs['textColor']
+                : const Color(0xFF757575),
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : FlutterLogoStyle.markOnly,
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : const Duration(milliseconds: 750),
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.fastOutSlowIn);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +39,7 @@ extension FlutterLogoBinding on FlutterLogo {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlutterLogo');
+        return const HTType('FlutterLogo');
       case 'size':
         return size;
       case 'textColor':
@@ -47,31 +55,44 @@ extension FlutterLogoBinding on FlutterLogo {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/grid_tile.g.dart b/lib/bindings/flutter/material/grid_tile.g.dart
index 6ad5385..121948f 100644
--- a/lib/bindings/flutter/material/grid_tile.g.dart
+++ b/lib/bindings/flutter/material/grid_tile.g.dart
@@ -11,11 +11,13 @@ class GridTileAutoBinding extends HTExternalClass {
       case 'GridTile':
         return ({positionalArgs, namedArgs, typeArgs}) => GridTile(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            footer: namedArgs.containsKey('footer') ? namedArgs['footer'] : null,
+            header:
+                namedArgs.containsKey('header') ? namedArgs['header'] : null,
+            footer:
+                namedArgs.containsKey('footer') ? namedArgs['footer'] : null,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +31,7 @@ extension GridTileBinding on GridTile {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GridTile');
+        return const HTType('GridTile');
       case 'header':
         return header;
       case 'footer':
@@ -41,31 +43,44 @@ extension GridTileBinding on GridTile {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/grid_tile_bar.g.dart b/lib/bindings/flutter/material/grid_tile_bar.g.dart
index de78ccd..694e8cd 100644
--- a/lib/bindings/flutter/material/grid_tile_bar.g.dart
+++ b/lib/bindings/flutter/material/grid_tile_bar.g.dart
@@ -11,13 +11,20 @@ class GridTileBarAutoBinding extends HTExternalClass {
       case 'GridTileBar':
         return ({positionalArgs, namedArgs, typeArgs}) => GridTileBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            subtitle: namedArgs.containsKey('subtitle') ? namedArgs['subtitle'] : null,
-            trailing: namedArgs.containsKey('trailing') ? namedArgs['trailing'] : null);
+            subtitle: namedArgs.containsKey('subtitle')
+                ? namedArgs['subtitle']
+                : null,
+            trailing: namedArgs.containsKey('trailing')
+                ? namedArgs['trailing']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +38,7 @@ extension GridTileBarBinding on GridTileBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GridTileBar');
+        return const HTType('GridTileBar');
       case 'backgroundColor':
         return backgroundColor;
       case 'leading':
@@ -47,31 +54,44 @@ extension GridTileBarBinding on GridTileBar {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/icon_button.g.dart b/lib/bindings/flutter/material/icon_button.g.dart
index a217bd8..434a534 100644
--- a/lib/bindings/flutter/material/icon_button.g.dart
+++ b/lib/bindings/flutter/material/icon_button.g.dart
@@ -13,27 +13,58 @@ class IconButtonAutoBinding extends HTExternalClass {
       case 'IconButton':
         return ({positionalArgs, namedArgs, typeArgs}) => IconButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            iconSize: namedArgs.containsKey('iconSize') ? namedArgs['iconSize'] : 24.0,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : const EdgeInsets.all(8.0),
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
+            iconSize: namedArgs.containsKey('iconSize')
+                ? namedArgs['iconSize']
+                : 24.0,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            padding: namedArgs.containsKey('padding')
+                ? namedArgs['padding']
+                : const EdgeInsets.all(8.0),
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null,
             icon: namedArgs['icon'],
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
             onPressed: namedArgs['onPressed'],
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : SystemMouseCursors.click,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : true,
-            constraints: namedArgs.containsKey('constraints') ? namedArgs['constraints'] : null);
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : SystemMouseCursors.click,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            tooltip:
+                namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : true,
+            constraints: namedArgs.containsKey('constraints')
+                ? namedArgs['constraints']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,7 +75,8 @@ class IconButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -53,7 +85,7 @@ extension IconButtonBinding on IconButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IconButton');
+        return const HTType('IconButton');
       case 'iconSize':
         return iconSize;
       case 'visualDensity':
@@ -97,31 +129,44 @@ extension IconButtonBinding on IconButton {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/icons.g.dart b/lib/bindings/flutter/material/icons.g.dart
index 270ad89..6c95635 100644
--- a/lib/bindings/flutter/material/icons.g.dart
+++ b/lib/bindings/flutter/material/icons.g.dart
@@ -11318,7 +11318,7 @@ class IconsAutoBinding extends HTExternalClass {
       case 'Icons.zoom_out_sharp':
         return Icons.zoom_out_sharp;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/ink_decoration.g.dart b/lib/bindings/flutter/material/ink_decoration.g.dart
index 3e6cca0..091de85 100644
--- a/lib/bindings/flutter/material/ink_decoration.g.dart
+++ b/lib/bindings/flutter/material/ink_decoration.g.dart
@@ -12,29 +12,47 @@ class InkAutoBinding extends HTExternalClass {
       case 'Ink':
         return ({positionalArgs, namedArgs, typeArgs}) => Ink(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'Ink.image':
         return ({positionalArgs, namedArgs, typeArgs}) => Ink.image(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             image: namedArgs['image'],
-            onImageError: namedArgs.containsKey('onImageError') ? namedArgs['onImageError'] : null,
-            colorFilter: namedArgs.containsKey('colorFilter') ? namedArgs['colorFilter'] : null,
+            onImageError: namedArgs.containsKey('onImageError')
+                ? namedArgs['onImageError']
+                : null,
+            colorFilter: namedArgs.containsKey('colorFilter')
+                ? namedArgs['colorFilter']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,8 +63,9 @@ class InkAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -55,7 +74,7 @@ extension InkBinding on Ink {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Ink');
+        return const HTType('Ink');
       case 'child':
         return child;
       case 'padding':
@@ -71,7 +90,8 @@ extension InkBinding on Ink {
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'createElement':
@@ -80,22 +100,33 @@ extension InkBinding on Ink {
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -112,9 +143,11 @@ class InkDecorationAutoBinding extends HTExternalClass {
             configuration: namedArgs['configuration'],
             controller: namedArgs['controller'],
             referenceBox: namedArgs['referenceBox'],
-            onRemoved: namedArgs.containsKey('onRemoved') ? namedArgs['onRemoved'] : null);
+            onRemoved: namedArgs.containsKey('onRemoved')
+                ? namedArgs['onRemoved']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -130,7 +163,8 @@ class InkDecorationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -139,7 +173,7 @@ extension InkDecorationBinding on InkDecoration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InkDecoration');
+        return const HTType('InkDecoration');
       case 'referenceBox':
         return referenceBox;
       case 'onRemoved':
@@ -153,11 +187,12 @@ extension InkDecorationBinding on InkDecoration {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'paintFeature':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintFeature(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintFeature(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -170,7 +205,7 @@ extension InkDecorationBinding on InkDecoration {
         configuration = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/ink_highlight.g.dart b/lib/bindings/flutter/material/ink_highlight.g.dart
index 244c98d..d84fc92 100644
--- a/lib/bindings/flutter/material/ink_highlight.g.dart
+++ b/lib/bindings/flutter/material/ink_highlight.g.dart
@@ -17,16 +17,28 @@ class InkHighlightAutoBinding extends HTExternalClass {
             referenceBox: namedArgs['referenceBox'],
             color: namedArgs['color'],
             textDirection: namedArgs['textDirection'],
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : BoxShape.rectangle,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            customBorder: namedArgs.containsKey('customBorder') ? namedArgs['customBorder'] : null,
-            rectCallback: namedArgs.containsKey('rectCallback') ? namedArgs['rectCallback'] : null,
-            onRemoved: namedArgs.containsKey('onRemoved') ? namedArgs['onRemoved'] : null,
-            fadeDuration:
-                namedArgs.containsKey('fadeDuration') ? namedArgs['fadeDuration'] : _kDefaultHighlightFadeDuration);
+            shape: namedArgs.containsKey('shape')
+                ? namedArgs['shape']
+                : BoxShape.rectangle,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            customBorder: namedArgs.containsKey('customBorder')
+                ? namedArgs['customBorder']
+                : null,
+            rectCallback: namedArgs.containsKey('rectCallback')
+                ? namedArgs['rectCallback']
+                : null,
+            onRemoved: namedArgs.containsKey('onRemoved')
+                ? namedArgs['onRemoved']
+                : null,
+            fadeDuration: namedArgs.containsKey('fadeDuration')
+                ? namedArgs['fadeDuration']
+                : _kDefaultHighlightFadeDuration);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,9 +49,10 @@ class InkHighlightAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RectCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Rect,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'RectCallback': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {}) as Rect,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -48,7 +61,7 @@ extension InkHighlightBinding on InkHighlight {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InkHighlight');
+        return const HTType('InkHighlight');
       case 'referenceBox':
         return referenceBox;
       case 'onRemoved':
@@ -66,7 +79,8 @@ extension InkHighlightBinding on InkHighlight {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'paintFeature':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintFeature(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintFeature(positionalArgs[0], positionalArgs[1]);
       case 'confirm':
         return ({positionalArgs, namedArgs, typeArgs}) => confirm();
       case 'cancel':
@@ -74,7 +88,7 @@ extension InkHighlightBinding on InkHighlight {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/ink_ripple.g.dart b/lib/bindings/flutter/material/ink_ripple.g.dart
index be404eb..410fa0f 100644
--- a/lib/bindings/flutter/material/ink_ripple.g.dart
+++ b/lib/bindings/flutter/material/ink_ripple.g.dart
@@ -16,16 +16,27 @@ class InkRippleAutoBinding extends HTExternalClass {
             position: namedArgs['position'],
             color: namedArgs['color'],
             textDirection: namedArgs['textDirection'],
-            containedInkWell: namedArgs.containsKey('containedInkWell') ? namedArgs['containedInkWell'] : false,
-            rectCallback: namedArgs.containsKey('rectCallback') ? namedArgs['rectCallback'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            customBorder: namedArgs.containsKey('customBorder') ? namedArgs['customBorder'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            onRemoved: namedArgs.containsKey('onRemoved') ? namedArgs['onRemoved'] : null);
+            containedInkWell: namedArgs.containsKey('containedInkWell')
+                ? namedArgs['containedInkWell']
+                : false,
+            rectCallback: namedArgs.containsKey('rectCallback')
+                ? namedArgs['rectCallback']
+                : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            customBorder: namedArgs.containsKey('customBorder')
+                ? namedArgs['customBorder']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            onRemoved: namedArgs.containsKey('onRemoved')
+                ? namedArgs['onRemoved']
+                : null);
       case 'InkRipple.splashFactory':
         return InkRipple.splashFactory;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,9 +47,10 @@ class InkRippleAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RectCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Rect,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'RectCallback': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {}) as Rect,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -47,7 +59,7 @@ extension InkRippleBinding on InkRipple {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InkRipple');
+        return const HTType('InkRipple');
       case 'referenceBox':
         return referenceBox;
       case 'onRemoved':
@@ -63,11 +75,12 @@ extension InkRippleBinding on InkRipple {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'paintFeature':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintFeature(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintFeature(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/ink_splash.g.dart b/lib/bindings/flutter/material/ink_splash.g.dart
index 44e1e3b..a5321f9 100644
--- a/lib/bindings/flutter/material/ink_splash.g.dart
+++ b/lib/bindings/flutter/material/ink_splash.g.dart
@@ -14,18 +14,31 @@ class InkSplashAutoBinding extends HTExternalClass {
             controller: namedArgs['controller'],
             referenceBox: namedArgs['referenceBox'],
             textDirection: namedArgs['textDirection'],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
             color: namedArgs['color'],
-            containedInkWell: namedArgs.containsKey('containedInkWell') ? namedArgs['containedInkWell'] : false,
-            rectCallback: namedArgs.containsKey('rectCallback') ? namedArgs['rectCallback'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            customBorder: namedArgs.containsKey('customBorder') ? namedArgs['customBorder'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            onRemoved: namedArgs.containsKey('onRemoved') ? namedArgs['onRemoved'] : null);
+            containedInkWell: namedArgs.containsKey('containedInkWell')
+                ? namedArgs['containedInkWell']
+                : false,
+            rectCallback: namedArgs.containsKey('rectCallback')
+                ? namedArgs['rectCallback']
+                : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            customBorder: namedArgs.containsKey('customBorder')
+                ? namedArgs['customBorder']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            onRemoved: namedArgs.containsKey('onRemoved')
+                ? namedArgs['onRemoved']
+                : null);
       case 'InkSplash.splashFactory':
         return InkSplash.splashFactory;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,9 +49,10 @@ class InkSplashAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RectCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Rect,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'RectCallback': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {}) as Rect,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -47,7 +61,7 @@ extension InkSplashBinding on InkSplash {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InkSplash');
+        return const HTType('InkSplash');
       case 'referenceBox':
         return referenceBox;
       case 'onRemoved':
@@ -63,11 +77,12 @@ extension InkSplashBinding on InkSplash {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'paintFeature':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintFeature(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintFeature(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/ink_well.g.dart b/lib/bindings/flutter/material/ink_well.g.dart
index 52dff34..53c4532 100644
--- a/lib/bindings/flutter/material/ink_well.g.dart
+++ b/lib/bindings/flutter/material/ink_well.g.dart
@@ -15,33 +15,78 @@ class InkResponseAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onTapDown: namedArgs.containsKey('onTapDown') ? namedArgs['onTapDown'] : null,
-            onTapCancel: namedArgs.containsKey('onTapCancel') ? namedArgs['onTapCancel'] : null,
-            onDoubleTap: namedArgs.containsKey('onDoubleTap') ? namedArgs['onDoubleTap'] : null,
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onHighlightChanged: namedArgs.containsKey('onHighlightChanged') ? namedArgs['onHighlightChanged'] : null,
-            onHover: namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            containedInkWell: namedArgs.containsKey('containedInkWell') ? namedArgs['containedInkWell'] : false,
-            highlightShape: namedArgs.containsKey('highlightShape') ? namedArgs['highlightShape'] : BoxShape.circle,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            customBorder: namedArgs.containsKey('customBorder') ? namedArgs['customBorder'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            splashFactory: namedArgs.containsKey('splashFactory') ? namedArgs['splashFactory'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : true,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            canRequestFocus: namedArgs.containsKey('canRequestFocus') ? namedArgs['canRequestFocus'] : true,
-            onFocusChange: namedArgs.containsKey('onFocusChange') ? namedArgs['onFocusChange'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
+            onTapDown: namedArgs.containsKey('onTapDown')
+                ? namedArgs['onTapDown']
+                : null,
+            onTapCancel: namedArgs.containsKey('onTapCancel')
+                ? namedArgs['onTapCancel']
+                : null,
+            onDoubleTap: namedArgs.containsKey('onDoubleTap')
+                ? namedArgs['onDoubleTap']
+                : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            onHighlightChanged: namedArgs.containsKey('onHighlightChanged')
+                ? namedArgs['onHighlightChanged']
+                : null,
+            onHover:
+                namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            containedInkWell: namedArgs.containsKey('containedInkWell')
+                ? namedArgs['containedInkWell']
+                : false,
+            highlightShape: namedArgs.containsKey('highlightShape')
+                ? namedArgs['highlightShape']
+                : BoxShape.circle,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            customBorder: namedArgs.containsKey('customBorder')
+                ? namedArgs['customBorder']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            splashFactory: namedArgs.containsKey('splashFactory')
+                ? namedArgs['splashFactory']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : true,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            canRequestFocus: namedArgs.containsKey('canRequestFocus')
+                ? namedArgs['canRequestFocus']
+                : true,
+            onFocusChange: namedArgs.containsKey('onFocusChange')
+                ? namedArgs['onFocusChange']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -52,9 +97,10 @@ class InkResponseAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureTapDownCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapDownCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
       'GestureLongPressCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
@@ -65,7 +111,7 @@ extension InkResponseBinding on InkResponse {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InkResponse');
+        return const HTType('InkResponse');
       case 'child':
         return child;
       case 'onTap':
@@ -123,35 +169,50 @@ extension InkResponseBinding on InkResponse {
       case 'hashCode':
         return hashCode;
       case 'getRectCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => getRectCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getRectCallback(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugCheckContext':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCheckContext(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCheckContext(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -167,31 +228,72 @@ class InkWellAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onDoubleTap: namedArgs.containsKey('onDoubleTap') ? namedArgs['onDoubleTap'] : null,
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onTapDown: namedArgs.containsKey('onTapDown') ? namedArgs['onTapDown'] : null,
-            onTapCancel: namedArgs.containsKey('onTapCancel') ? namedArgs['onTapCancel'] : null,
-            onHighlightChanged: namedArgs.containsKey('onHighlightChanged') ? namedArgs['onHighlightChanged'] : null,
-            onHover: namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            splashFactory: namedArgs.containsKey('splashFactory') ? namedArgs['splashFactory'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            customBorder: namedArgs.containsKey('customBorder') ? namedArgs['customBorder'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : true,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            canRequestFocus: namedArgs.containsKey('canRequestFocus') ? namedArgs['canRequestFocus'] : true,
-            onFocusChange: namedArgs.containsKey('onFocusChange') ? namedArgs['onFocusChange'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
+            onDoubleTap: namedArgs.containsKey('onDoubleTap')
+                ? namedArgs['onDoubleTap']
+                : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            onTapDown: namedArgs.containsKey('onTapDown')
+                ? namedArgs['onTapDown']
+                : null,
+            onTapCancel: namedArgs.containsKey('onTapCancel')
+                ? namedArgs['onTapCancel']
+                : null,
+            onHighlightChanged: namedArgs.containsKey('onHighlightChanged')
+                ? namedArgs['onHighlightChanged']
+                : null,
+            onHover:
+                namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            splashFactory: namedArgs.containsKey('splashFactory')
+                ? namedArgs['splashFactory']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            customBorder: namedArgs.containsKey('customBorder')
+                ? namedArgs['customBorder']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : true,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            canRequestFocus: namedArgs.containsKey('canRequestFocus')
+                ? namedArgs['canRequestFocus']
+                : true,
+            onFocusChange: namedArgs.containsKey('onFocusChange')
+                ? namedArgs['onFocusChange']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -202,11 +304,12 @@ class InkWellAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
       'GestureLongPressCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureTapDownCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureTapDownCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
       'GestureTapCancelCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
@@ -217,7 +320,7 @@ extension InkWellBinding on InkWell {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InkWell');
+        return const HTType('InkWell');
       case 'child':
         return child;
       case 'onTap':
@@ -275,35 +378,50 @@ extension InkWellBinding on InkWell {
       case 'hashCode':
         return hashCode;
       case 'getRectCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => getRectCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getRectCallback(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugCheckContext':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCheckContext(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCheckContext(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/input_border.g.dart b/lib/bindings/flutter/material/input_border.g.dart
index 6e0086a..25e2767 100644
--- a/lib/bindings/flutter/material/input_border.g.dart
+++ b/lib/bindings/flutter/material/input_border.g.dart
@@ -11,12 +11,16 @@ class UnderlineInputBorderAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'UnderlineInputBorder':
         return ({positionalArgs, namedArgs, typeArgs}) => UnderlineInputBorder(
-            borderSide: namedArgs.containsKey('borderSide') ? namedArgs['borderSide'] : const BorderSide(),
+            borderSide: namedArgs.containsKey('borderSide')
+                ? namedArgs['borderSide']
+                : const BorderSide(),
             borderRadius: namedArgs.containsKey('borderRadius')
                 ? namedArgs['borderRadius']
-                : const BorderRadius.only(topLeft: Radius.circular(4.0), topRight: Radius.circular(4.0)));
+                : const BorderRadius.only(
+                    topLeft: Radius.circular(4.0),
+                    topRight: Radius.circular(4.0)));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +34,7 @@ extension UnderlineInputBorderBinding on UnderlineInputBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UnderlineInputBorder');
+        return const HTType('UnderlineInputBorder');
       case 'borderRadius':
         return borderRadius;
       case 'borderSide':
@@ -43,30 +47,52 @@ extension UnderlineInputBorderBinding on UnderlineInputBorder {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            borderSide: namedArgs.containsKey('borderSide') ? namedArgs['borderSide'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null);
+            borderSide: namedArgs.containsKey('borderSide')
+                ? namedArgs['borderSide']
+                : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            gapStart: namedArgs.containsKey('gapStart') ? namedArgs['gapStart'] : null,
-            gapExtent: namedArgs.containsKey('gapExtent') ? namedArgs['gapExtent'] : 0.0,
-            gapPercentage: namedArgs.containsKey('gapPercentage') ? namedArgs['gapPercentage'] : 0.0,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            gapStart: namedArgs.containsKey('gapStart')
+                ? namedArgs['gapStart']
+                : null,
+            gapExtent: namedArgs.containsKey('gapExtent')
+                ? namedArgs['gapExtent']
+                : 0.0,
+            gapPercentage: namedArgs.containsKey('gapPercentage')
+                ? namedArgs['gapPercentage']
+                : 0.0,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,13 +105,17 @@ class OutlineInputBorderAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'OutlineInputBorder':
         return ({positionalArgs, namedArgs, typeArgs}) => OutlineInputBorder(
-            borderSide: namedArgs.containsKey('borderSide') ? namedArgs['borderSide'] : const BorderSide(),
+            borderSide: namedArgs.containsKey('borderSide')
+                ? namedArgs['borderSide']
+                : const BorderSide(),
             borderRadius: namedArgs.containsKey('borderRadius')
                 ? namedArgs['borderRadius']
                 : const BorderRadius.all(Radius.circular(4.0)),
-            gapPadding: namedArgs.containsKey('gapPadding') ? namedArgs['gapPadding'] : 4.0);
+            gapPadding: namedArgs.containsKey('gapPadding')
+                ? namedArgs['gapPadding']
+                : 4.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -99,7 +129,7 @@ extension OutlineInputBorderBinding on OutlineInputBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OutlineInputBorder');
+        return const HTType('OutlineInputBorder');
       case 'gapPadding':
         return gapPadding;
       case 'borderRadius':
@@ -114,31 +144,55 @@ extension OutlineInputBorderBinding on OutlineInputBorder {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            borderSide: namedArgs.containsKey('borderSide') ? namedArgs['borderSide'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            gapPadding: namedArgs.containsKey('gapPadding') ? namedArgs['gapPadding'] : null);
+            borderSide: namedArgs.containsKey('borderSide')
+                ? namedArgs['borderSide']
+                : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            gapPadding: namedArgs.containsKey('gapPadding')
+                ? namedArgs['gapPadding']
+                : null);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            gapStart: namedArgs.containsKey('gapStart') ? namedArgs['gapStart'] : null,
-            gapExtent: namedArgs.containsKey('gapExtent') ? namedArgs['gapExtent'] : 0.0,
-            gapPercentage: namedArgs.containsKey('gapPercentage') ? namedArgs['gapPercentage'] : 0.0,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            gapStart: namedArgs.containsKey('gapStart')
+                ? namedArgs['gapStart']
+                : null,
+            gapExtent: namedArgs.containsKey('gapExtent')
+                ? namedArgs['gapExtent']
+                : 0.0,
+            gapPercentage: namedArgs.containsKey('gapPercentage')
+                ? namedArgs['gapPercentage']
+                : 0.0,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/input_date_picker_form_field.g.dart b/lib/bindings/flutter/material/input_date_picker_form_field.g.dart
index 81a61b7..2ff2430 100644
--- a/lib/bindings/flutter/material/input_date_picker_form_field.g.dart
+++ b/lib/bindings/flutter/material/input_date_picker_form_field.g.dart
@@ -9,22 +9,41 @@ class InputDatePickerFormFieldAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'InputDatePickerFormField':
-        return ({positionalArgs, namedArgs, typeArgs}) => InputDatePickerFormField(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            initialDate: namedArgs.containsKey('initialDate') ? namedArgs['initialDate'] : null,
-            firstDate: namedArgs['firstDate'],
-            lastDate: namedArgs['lastDate'],
-            onDateSubmitted: namedArgs.containsKey('onDateSubmitted') ? namedArgs['onDateSubmitted'] : null,
-            onDateSaved: namedArgs.containsKey('onDateSaved') ? namedArgs['onDateSaved'] : null,
-            selectableDayPredicate:
-                namedArgs.containsKey('selectableDayPredicate') ? namedArgs['selectableDayPredicate'] : null,
-            errorFormatText: namedArgs.containsKey('errorFormatText') ? namedArgs['errorFormatText'] : null,
-            errorInvalidText: namedArgs.containsKey('errorInvalidText') ? namedArgs['errorInvalidText'] : null,
-            fieldHintText: namedArgs.containsKey('fieldHintText') ? namedArgs['fieldHintText'] : null,
-            fieldLabelText: namedArgs.containsKey('fieldLabelText') ? namedArgs['fieldLabelText'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InputDatePickerFormField(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                initialDate: namedArgs.containsKey('initialDate')
+                    ? namedArgs['initialDate']
+                    : null,
+                firstDate: namedArgs['firstDate'],
+                lastDate: namedArgs['lastDate'],
+                onDateSubmitted: namedArgs.containsKey('onDateSubmitted')
+                    ? namedArgs['onDateSubmitted']
+                    : null,
+                onDateSaved: namedArgs.containsKey('onDateSaved')
+                    ? namedArgs['onDateSaved']
+                    : null,
+                selectableDayPredicate:
+                    namedArgs.containsKey('selectableDayPredicate')
+                        ? namedArgs['selectableDayPredicate']
+                        : null,
+                errorFormatText: namedArgs.containsKey('errorFormatText')
+                    ? namedArgs['errorFormatText']
+                    : null,
+                errorInvalidText: namedArgs.containsKey('errorInvalidText')
+                    ? namedArgs['errorInvalidText']
+                    : null,
+                fieldHintText: namedArgs.containsKey('fieldHintText')
+                    ? namedArgs['fieldHintText']
+                    : null,
+                fieldLabelText: namedArgs.containsKey('fieldLabelText')
+                    ? namedArgs['fieldLabelText']
+                    : null,
+                autofocus: namedArgs.containsKey('autofocus')
+                    ? namedArgs['autofocus']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,8 +54,8 @@ class InputDatePickerFormFieldAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SelectableDayPredicate': (HTFunction function) =>
-          (day) => function.call(positionalArgs: [day], namedArgs: const {}) as bool,
+      'SelectableDayPredicate': (HTFunction function) => (day) =>
+          function.call(positionalArgs: [day], namedArgs: const {}) as bool,
     };
   }
 }
@@ -45,7 +64,7 @@ extension InputDatePickerFormFieldBinding on InputDatePickerFormField {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InputDatePickerFormField');
+        return const HTType('InputDatePickerFormField');
       case 'initialDate':
         return initialDate;
       case 'firstDate':
@@ -79,25 +98,37 @@ extension InputDatePickerFormFieldBinding on InputDatePickerFormField {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/input_decorator.g.dart b/lib/bindings/flutter/material/input_decorator.g.dart
index df827f2..b2e55ef 100644
--- a/lib/bindings/flutter/material/input_decorator.g.dart
+++ b/lib/bindings/flutter/material/input_decorator.g.dart
@@ -19,7 +19,7 @@ class FloatingLabelBehaviorAutoBinding extends HTExternalClass {
       case 'FloatingLabelBehavior.always':
         return FloatingLabelBehavior.always;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +27,14 @@ class FloatingLabelBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FloatingLabelBehavior');
+        return const HTType('FloatingLabelBehavior');
       case 'index':
         return (instance as FloatingLabelBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FloatingLabelBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FloatingLabelBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,18 +49,31 @@ class InputDecoratorAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => InputDecorator(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             decoration: namedArgs['decoration'],
-            baseStyle: namedArgs.containsKey('baseStyle') ? namedArgs['baseStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            textAlignVertical: namedArgs.containsKey('textAlignVertical') ? namedArgs['textAlignVertical'] : null,
-            isFocused: namedArgs.containsKey('isFocused') ? namedArgs['isFocused'] : false,
-            isHovering: namedArgs.containsKey('isHovering') ? namedArgs['isHovering'] : false,
-            expands: namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
-            isEmpty: namedArgs.containsKey('isEmpty') ? namedArgs['isEmpty'] : false,
+            baseStyle: namedArgs.containsKey('baseStyle')
+                ? namedArgs['baseStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            textAlignVertical: namedArgs.containsKey('textAlignVertical')
+                ? namedArgs['textAlignVertical']
+                : null,
+            isFocused: namedArgs.containsKey('isFocused')
+                ? namedArgs['isFocused']
+                : false,
+            isHovering: namedArgs.containsKey('isHovering')
+                ? namedArgs['isHovering']
+                : false,
+            expands:
+                namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
+            isEmpty:
+                namedArgs.containsKey('isEmpty') ? namedArgs['isEmpty'] : false,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'InputDecorator.containerOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => InputDecorator.containerOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InputDecorator.containerOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -73,7 +87,7 @@ extension InputDecoratorBinding on InputDecorator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InputDecorator');
+        return const HTType('InputDecorator');
       case 'decoration':
         return decoration;
       case 'baseStyle':
@@ -99,29 +113,41 @@ extension InputDecoratorBinding on InputDecorator {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -135,35 +161,82 @@ class InputDecorationAutoBinding extends HTExternalClass {
       case 'InputDecoration':
         return ({positionalArgs, namedArgs, typeArgs}) => InputDecoration(
             icon: namedArgs.containsKey('icon') ? namedArgs['icon'] : null,
-            labelText: namedArgs.containsKey('labelText') ? namedArgs['labelText'] : null,
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            helperText: namedArgs.containsKey('helperText') ? namedArgs['helperText'] : null,
-            helperStyle: namedArgs.containsKey('helperStyle') ? namedArgs['helperStyle'] : null,
-            helperMaxLines: namedArgs.containsKey('helperMaxLines') ? namedArgs['helperMaxLines'] : null,
-            hintText: namedArgs.containsKey('hintText') ? namedArgs['hintText'] : null,
-            hintStyle: namedArgs.containsKey('hintStyle') ? namedArgs['hintStyle'] : null,
-            hintTextDirection: namedArgs.containsKey('hintTextDirection') ? namedArgs['hintTextDirection'] : null,
-            hintMaxLines: namedArgs.containsKey('hintMaxLines') ? namedArgs['hintMaxLines'] : null,
-            errorText: namedArgs.containsKey('errorText') ? namedArgs['errorText'] : null,
-            errorStyle: namedArgs.containsKey('errorStyle') ? namedArgs['errorStyle'] : null,
-            errorMaxLines: namedArgs.containsKey('errorMaxLines') ? namedArgs['errorMaxLines'] : null,
-            floatingLabelBehavior:
-                namedArgs.containsKey('floatingLabelBehavior') ? namedArgs['floatingLabelBehavior'] : null,
-            isCollapsed: namedArgs.containsKey('isCollapsed') ? namedArgs['isCollapsed'] : false,
-            isDense: namedArgs.containsKey('isDense') ? namedArgs['isDense'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            prefixIcon: namedArgs.containsKey('prefixIcon') ? namedArgs['prefixIcon'] : null,
-            prefixIconConstraints:
-                namedArgs.containsKey('prefixIconConstraints') ? namedArgs['prefixIconConstraints'] : null,
-            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
-            prefixText: namedArgs.containsKey('prefixText') ? namedArgs['prefixText'] : null,
-            prefixStyle: namedArgs.containsKey('prefixStyle') ? namedArgs['prefixStyle'] : null,
-            suffixIcon: namedArgs.containsKey('suffixIcon') ? namedArgs['suffixIcon'] : null,
-            suffix: namedArgs.containsKey('suffix') ? namedArgs['suffix'] : null,
-            suffixText: namedArgs.containsKey('suffixText') ? namedArgs['suffixText'] : null,
-            suffixStyle: namedArgs.containsKey('suffixStyle') ? namedArgs['suffixStyle'] : null,
+            labelText: namedArgs.containsKey('labelText')
+                ? namedArgs['labelText']
+                : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            helperText: namedArgs.containsKey('helperText')
+                ? namedArgs['helperText']
+                : null,
+            helperStyle: namedArgs.containsKey('helperStyle')
+                ? namedArgs['helperStyle']
+                : null,
+            helperMaxLines: namedArgs.containsKey('helperMaxLines')
+                ? namedArgs['helperMaxLines']
+                : null,
+            hintText: namedArgs.containsKey('hintText')
+                ? namedArgs['hintText']
+                : null,
+            hintStyle: namedArgs.containsKey('hintStyle')
+                ? namedArgs['hintStyle']
+                : null,
+            hintTextDirection: namedArgs.containsKey('hintTextDirection')
+                ? namedArgs['hintTextDirection']
+                : null,
+            hintMaxLines: namedArgs.containsKey('hintMaxLines')
+                ? namedArgs['hintMaxLines']
+                : null,
+            errorText: namedArgs.containsKey('errorText')
+                ? namedArgs['errorText']
+                : null,
+            errorStyle: namedArgs.containsKey('errorStyle')
+                ? namedArgs['errorStyle']
+                : null,
+            errorMaxLines: namedArgs.containsKey('errorMaxLines')
+                ? namedArgs['errorMaxLines']
+                : null,
+            floatingLabelBehavior: namedArgs.containsKey('floatingLabelBehavior')
+                ? namedArgs['floatingLabelBehavior']
+                : null,
+            isCollapsed: namedArgs.containsKey('isCollapsed')
+                ? namedArgs['isCollapsed']
+                : false,
+            isDense:
+                namedArgs.containsKey('isDense') ? namedArgs['isDense'] : null,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            prefixIcon: namedArgs.containsKey('prefixIcon')
+                ? namedArgs['prefixIcon']
+                : null,
+            prefixIconConstraints: namedArgs.containsKey('prefixIconConstraints')
+                ? namedArgs['prefixIconConstraints']
+                : null,
+            prefix:
+                namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
+            prefixText: namedArgs.containsKey('prefixText')
+                ? namedArgs['prefixText']
+                : null,
+            prefixStyle: namedArgs.containsKey('prefixStyle')
+                ? namedArgs['prefixStyle']
+                : null,
+            suffixIcon: namedArgs.containsKey('suffixIcon')
+                ? namedArgs['suffixIcon']
+                : null,
+            suffix:
+                namedArgs.containsKey('suffix') ? namedArgs['suffix'] : null,
+            suffixText: namedArgs.containsKey('suffixText')
+                ? namedArgs['suffixText']
+                : null,
+            suffixStyle: namedArgs.containsKey('suffixStyle')
+                ? namedArgs['suffixStyle']
+                : null,
             suffixIconConstraints:
-                namedArgs.containsKey('suffixIconConstraints') ? namedArgs['suffixIconConstraints'] : null,
+                namedArgs.containsKey('suffixIconConstraints')
+                    ? namedArgs['suffixIconConstraints']
+                    : null,
             counter: namedArgs.containsKey('counter') ? namedArgs['counter'] : null,
             counterText: namedArgs.containsKey('counterText') ? namedArgs['counterText'] : null,
             counterStyle: namedArgs.containsKey('counterStyle') ? namedArgs['counterStyle'] : null,
@@ -181,20 +254,41 @@ class InputDecorationAutoBinding extends HTExternalClass {
             semanticCounterText: namedArgs.containsKey('semanticCounterText') ? namedArgs['semanticCounterText'] : null,
             alignLabelWithHint: namedArgs.containsKey('alignLabelWithHint') ? namedArgs['alignLabelWithHint'] : null);
       case 'InputDecoration.collapsed':
-        return ({positionalArgs, namedArgs, typeArgs}) => InputDecoration.collapsed(
-            hintText: namedArgs['hintText'],
-            floatingLabelBehavior:
-                namedArgs.containsKey('floatingLabelBehavior') ? namedArgs['floatingLabelBehavior'] : null,
-            hintStyle: namedArgs.containsKey('hintStyle') ? namedArgs['hintStyle'] : null,
-            hintTextDirection: namedArgs.containsKey('hintTextDirection') ? namedArgs['hintTextDirection'] : null,
-            filled: namedArgs.containsKey('filled') ? namedArgs['filled'] : false,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : InputBorder.none,
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InputDecoration
+                .collapsed(
+                    hintText: namedArgs['hintText'],
+                    floatingLabelBehavior:
+                        namedArgs.containsKey('floatingLabelBehavior')
+                            ? namedArgs['floatingLabelBehavior']
+                            : null,
+                    hintStyle: namedArgs.containsKey('hintStyle')
+                        ? namedArgs['hintStyle']
+                        : null,
+                    hintTextDirection:
+                        namedArgs.containsKey('hintTextDirection')
+                            ? namedArgs['hintTextDirection']
+                            : null,
+                    filled: namedArgs.containsKey('filled')
+                        ? namedArgs['filled']
+                        : false,
+                    fillColor: namedArgs.containsKey('fillColor')
+                        ? namedArgs['fillColor']
+                        : null,
+                    focusColor: namedArgs.containsKey('focusColor')
+                        ? namedArgs['focusColor']
+                        : null,
+                    hoverColor: namedArgs.containsKey('hoverColor')
+                        ? namedArgs['hoverColor']
+                        : null,
+                    border: namedArgs.containsKey('border')
+                        ? namedArgs['border']
+                        : InputBorder.none,
+                    enabled: namedArgs.containsKey('enabled')
+                        ? namedArgs['enabled']
+                        : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -208,7 +302,7 @@ extension InputDecorationBinding on InputDecoration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InputDecoration');
+        return const HTType('InputDecoration');
       case 'icon':
         return icon;
       case 'labelText':
@@ -300,37 +394,80 @@ extension InputDecorationBinding on InputDecoration {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             icon: namedArgs.containsKey('icon') ? namedArgs['icon'] : null,
-            labelText: namedArgs.containsKey('labelText') ? namedArgs['labelText'] : null,
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            helperText: namedArgs.containsKey('helperText') ? namedArgs['helperText'] : null,
-            helperStyle: namedArgs.containsKey('helperStyle') ? namedArgs['helperStyle'] : null,
-            helperMaxLines: namedArgs.containsKey('helperMaxLines') ? namedArgs['helperMaxLines'] : null,
-            hintText: namedArgs.containsKey('hintText') ? namedArgs['hintText'] : null,
-            hintStyle: namedArgs.containsKey('hintStyle') ? namedArgs['hintStyle'] : null,
-            hintTextDirection: namedArgs.containsKey('hintTextDirection') ? namedArgs['hintTextDirection'] : null,
-            hintMaxLines: namedArgs.containsKey('hintMaxLines') ? namedArgs['hintMaxLines'] : null,
-            errorText: namedArgs.containsKey('errorText') ? namedArgs['errorText'] : null,
-            errorStyle: namedArgs.containsKey('errorStyle') ? namedArgs['errorStyle'] : null,
-            errorMaxLines: namedArgs.containsKey('errorMaxLines') ? namedArgs['errorMaxLines'] : null,
+            labelText: namedArgs.containsKey('labelText')
+                ? namedArgs['labelText']
+                : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            helperText: namedArgs.containsKey('helperText')
+                ? namedArgs['helperText']
+                : null,
+            helperStyle: namedArgs.containsKey('helperStyle')
+                ? namedArgs['helperStyle']
+                : null,
+            helperMaxLines: namedArgs.containsKey('helperMaxLines')
+                ? namedArgs['helperMaxLines']
+                : null,
+            hintText: namedArgs.containsKey('hintText')
+                ? namedArgs['hintText']
+                : null,
+            hintStyle: namedArgs.containsKey('hintStyle')
+                ? namedArgs['hintStyle']
+                : null,
+            hintTextDirection: namedArgs.containsKey('hintTextDirection')
+                ? namedArgs['hintTextDirection']
+                : null,
+            hintMaxLines: namedArgs.containsKey('hintMaxLines')
+                ? namedArgs['hintMaxLines']
+                : null,
+            errorText: namedArgs.containsKey('errorText')
+                ? namedArgs['errorText']
+                : null,
+            errorStyle: namedArgs.containsKey('errorStyle')
+                ? namedArgs['errorStyle']
+                : null,
+            errorMaxLines: namedArgs.containsKey('errorMaxLines')
+                ? namedArgs['errorMaxLines']
+                : null,
             hasFloatingPlaceholder:
-                namedArgs.containsKey('hasFloatingPlaceholder') ? namedArgs['hasFloatingPlaceholder'] : null,
+                namedArgs.containsKey('hasFloatingPlaceholder')
+                    ? namedArgs['hasFloatingPlaceholder']
+                    : null,
             floatingLabelBehavior:
-                namedArgs.containsKey('floatingLabelBehavior') ? namedArgs['floatingLabelBehavior'] : null,
-            isCollapsed: namedArgs.containsKey('isCollapsed') ? namedArgs['isCollapsed'] : null,
-            isDense: namedArgs.containsKey('isDense') ? namedArgs['isDense'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            prefixIcon: namedArgs.containsKey('prefixIcon') ? namedArgs['prefixIcon'] : null,
-            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
-            prefixText: namedArgs.containsKey('prefixText') ? namedArgs['prefixText'] : null,
+                namedArgs.containsKey('floatingLabelBehavior')
+                    ? namedArgs['floatingLabelBehavior']
+                    : null,
+            isCollapsed: namedArgs.containsKey('isCollapsed')
+                ? namedArgs['isCollapsed']
+                : null,
+            isDense:
+                namedArgs.containsKey('isDense') ? namedArgs['isDense'] : null,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            prefixIcon: namedArgs.containsKey('prefixIcon')
+                ? namedArgs['prefixIcon']
+                : null,
+            prefix:
+                namedArgs.containsKey('prefix') ? namedArgs['prefix'] : null,
+            prefixText: namedArgs.containsKey('prefixText')
+                ? namedArgs['prefixText']
+                : null,
             prefixIconConstraints:
-                namedArgs.containsKey('prefixIconConstraints') ? namedArgs['prefixIconConstraints'] : null,
-            prefixStyle: namedArgs.containsKey('prefixStyle') ? namedArgs['prefixStyle'] : null,
-            suffixIcon: namedArgs.containsKey('suffixIcon') ? namedArgs['suffixIcon'] : null,
+                namedArgs.containsKey('prefixIconConstraints')
+                    ? namedArgs['prefixIconConstraints']
+                    : null,
+            prefixStyle: namedArgs.containsKey('prefixStyle')
+                ? namedArgs['prefixStyle']
+                : null,
+            suffixIcon: namedArgs.containsKey('suffixIcon')
+                ? namedArgs['suffixIcon']
+                : null,
             suffix: namedArgs.containsKey('suffix') ? namedArgs['suffix'] : null,
             suffixText: namedArgs.containsKey('suffixText') ? namedArgs['suffixText'] : null,
             suffixStyle: namedArgs.containsKey('suffixStyle') ? namedArgs['suffixStyle'] : null,
-            suffixIconConstraints:
-                namedArgs.containsKey('suffixIconConstraints') ? namedArgs['suffixIconConstraints'] : null,
+            suffixIconConstraints: namedArgs.containsKey('suffixIconConstraints') ? namedArgs['suffixIconConstraints'] : null,
             counter: namedArgs.containsKey('counter') ? namedArgs['counter'] : null,
             counterText: namedArgs.containsKey('counterText') ? namedArgs['counterText'] : null,
             counterStyle: namedArgs.containsKey('counterStyle') ? namedArgs['counterStyle'] : null,
@@ -348,11 +485,12 @@ extension InputDecorationBinding on InputDecoration {
             semanticCounterText: namedArgs.containsKey('semanticCounterText') ? namedArgs['semanticCounterText'] : null,
             alignLabelWithHint: namedArgs.containsKey('alignLabelWithHint') ? namedArgs['alignLabelWithHint'] : null);
       case 'applyDefaults':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyDefaults(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyDefaults(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -365,34 +503,78 @@ class InputDecorationThemeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'InputDecorationTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => InputDecorationTheme(
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            helperStyle: namedArgs.containsKey('helperStyle') ? namedArgs['helperStyle'] : null,
-            helperMaxLines: namedArgs.containsKey('helperMaxLines') ? namedArgs['helperMaxLines'] : null,
-            hintStyle: namedArgs.containsKey('hintStyle') ? namedArgs['hintStyle'] : null,
-            errorStyle: namedArgs.containsKey('errorStyle') ? namedArgs['errorStyle'] : null,
-            errorMaxLines: namedArgs.containsKey('errorMaxLines') ? namedArgs['errorMaxLines'] : null,
-            floatingLabelBehavior: namedArgs.containsKey('floatingLabelBehavior')
-                ? namedArgs['floatingLabelBehavior']
-                : FloatingLabelBehavior.auto,
-            isDense: namedArgs.containsKey('isDense') ? namedArgs['isDense'] : false,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            isCollapsed: namedArgs.containsKey('isCollapsed') ? namedArgs['isCollapsed'] : false,
-            prefixStyle: namedArgs.containsKey('prefixStyle') ? namedArgs['prefixStyle'] : null,
-            suffixStyle: namedArgs.containsKey('suffixStyle') ? namedArgs['suffixStyle'] : null,
-            counterStyle: namedArgs.containsKey('counterStyle') ? namedArgs['counterStyle'] : null,
-            filled: namedArgs.containsKey('filled') ? namedArgs['filled'] : false,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            errorBorder: namedArgs.containsKey('errorBorder') ? namedArgs['errorBorder'] : null,
-            focusedBorder: namedArgs.containsKey('focusedBorder') ? namedArgs['focusedBorder'] : null,
-            focusedErrorBorder: namedArgs.containsKey('focusedErrorBorder') ? namedArgs['focusedErrorBorder'] : null,
-            disabledBorder: namedArgs.containsKey('disabledBorder') ? namedArgs['disabledBorder'] : null,
-            enabledBorder: namedArgs.containsKey('enabledBorder') ? namedArgs['enabledBorder'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : null,
-            alignLabelWithHint: namedArgs.containsKey('alignLabelWithHint') ? namedArgs['alignLabelWithHint'] : false);
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            helperStyle: namedArgs.containsKey('helperStyle')
+                ? namedArgs['helperStyle']
+                : null,
+            helperMaxLines: namedArgs.containsKey('helperMaxLines')
+                ? namedArgs['helperMaxLines']
+                : null,
+            hintStyle: namedArgs.containsKey('hintStyle')
+                ? namedArgs['hintStyle']
+                : null,
+            errorStyle: namedArgs.containsKey('errorStyle')
+                ? namedArgs['errorStyle']
+                : null,
+            errorMaxLines: namedArgs.containsKey('errorMaxLines')
+                ? namedArgs['errorMaxLines']
+                : null,
+            floatingLabelBehavior:
+                namedArgs.containsKey('floatingLabelBehavior')
+                    ? namedArgs['floatingLabelBehavior']
+                    : FloatingLabelBehavior.auto,
+            isDense:
+                namedArgs.containsKey('isDense') ? namedArgs['isDense'] : false,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            isCollapsed: namedArgs.containsKey('isCollapsed')
+                ? namedArgs['isCollapsed']
+                : false,
+            prefixStyle: namedArgs.containsKey('prefixStyle')
+                ? namedArgs['prefixStyle']
+                : null,
+            suffixStyle: namedArgs.containsKey('suffixStyle')
+                ? namedArgs['suffixStyle']
+                : null,
+            counterStyle: namedArgs.containsKey('counterStyle')
+                ? namedArgs['counterStyle']
+                : null,
+            filled:
+                namedArgs.containsKey('filled') ? namedArgs['filled'] : false,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            errorBorder: namedArgs.containsKey('errorBorder')
+                ? namedArgs['errorBorder']
+                : null,
+            focusedBorder: namedArgs.containsKey('focusedBorder')
+                ? namedArgs['focusedBorder']
+                : null,
+            focusedErrorBorder: namedArgs.containsKey('focusedErrorBorder')
+                ? namedArgs['focusedErrorBorder']
+                : null,
+            disabledBorder: namedArgs.containsKey('disabledBorder')
+                ? namedArgs['disabledBorder']
+                : null,
+            enabledBorder: namedArgs.containsKey('enabledBorder')
+                ? namedArgs['enabledBorder']
+                : null,
+            border:
+                namedArgs.containsKey('border') ? namedArgs['border'] : null,
+            alignLabelWithHint: namedArgs.containsKey('alignLabelWithHint')
+                ? namedArgs['alignLabelWithHint']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -406,7 +588,7 @@ extension InputDecorationThemeBinding on InputDecorationTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InputDecorationTheme');
+        return const HTType('InputDecorationTheme');
       case 'labelStyle':
         return labelStyle;
       case 'helperStyle':
@@ -459,44 +641,92 @@ extension InputDecorationThemeBinding on InputDecorationTheme {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            helperStyle: namedArgs.containsKey('helperStyle') ? namedArgs['helperStyle'] : null,
-            helperMaxLines: namedArgs.containsKey('helperMaxLines') ? namedArgs['helperMaxLines'] : null,
-            hintStyle: namedArgs.containsKey('hintStyle') ? namedArgs['hintStyle'] : null,
-            errorStyle: namedArgs.containsKey('errorStyle') ? namedArgs['errorStyle'] : null,
-            errorMaxLines: namedArgs.containsKey('errorMaxLines') ? namedArgs['errorMaxLines'] : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            helperStyle: namedArgs.containsKey('helperStyle')
+                ? namedArgs['helperStyle']
+                : null,
+            helperMaxLines: namedArgs.containsKey('helperMaxLines')
+                ? namedArgs['helperMaxLines']
+                : null,
+            hintStyle: namedArgs.containsKey('hintStyle')
+                ? namedArgs['hintStyle']
+                : null,
+            errorStyle: namedArgs.containsKey('errorStyle')
+                ? namedArgs['errorStyle']
+                : null,
+            errorMaxLines: namedArgs.containsKey('errorMaxLines')
+                ? namedArgs['errorMaxLines']
+                : null,
             floatingLabelBehavior:
-                namedArgs.containsKey('floatingLabelBehavior') ? namedArgs['floatingLabelBehavior'] : null,
-            isDense: namedArgs.containsKey('isDense') ? namedArgs['isDense'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            isCollapsed: namedArgs.containsKey('isCollapsed') ? namedArgs['isCollapsed'] : null,
-            prefixStyle: namedArgs.containsKey('prefixStyle') ? namedArgs['prefixStyle'] : null,
-            suffixStyle: namedArgs.containsKey('suffixStyle') ? namedArgs['suffixStyle'] : null,
-            counterStyle: namedArgs.containsKey('counterStyle') ? namedArgs['counterStyle'] : null,
-            filled: namedArgs.containsKey('filled') ? namedArgs['filled'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            errorBorder: namedArgs.containsKey('errorBorder') ? namedArgs['errorBorder'] : null,
-            focusedBorder: namedArgs.containsKey('focusedBorder') ? namedArgs['focusedBorder'] : null,
-            focusedErrorBorder: namedArgs.containsKey('focusedErrorBorder') ? namedArgs['focusedErrorBorder'] : null,
-            disabledBorder: namedArgs.containsKey('disabledBorder') ? namedArgs['disabledBorder'] : null,
-            enabledBorder: namedArgs.containsKey('enabledBorder') ? namedArgs['enabledBorder'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : null,
-            alignLabelWithHint: namedArgs.containsKey('alignLabelWithHint') ? namedArgs['alignLabelWithHint'] : null);
+                namedArgs.containsKey('floatingLabelBehavior')
+                    ? namedArgs['floatingLabelBehavior']
+                    : null,
+            isDense:
+                namedArgs.containsKey('isDense') ? namedArgs['isDense'] : null,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            isCollapsed: namedArgs.containsKey('isCollapsed')
+                ? namedArgs['isCollapsed']
+                : null,
+            prefixStyle: namedArgs.containsKey('prefixStyle')
+                ? namedArgs['prefixStyle']
+                : null,
+            suffixStyle: namedArgs.containsKey('suffixStyle')
+                ? namedArgs['suffixStyle']
+                : null,
+            counterStyle: namedArgs.containsKey('counterStyle')
+                ? namedArgs['counterStyle']
+                : null,
+            filled:
+                namedArgs.containsKey('filled') ? namedArgs['filled'] : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            errorBorder: namedArgs.containsKey('errorBorder')
+                ? namedArgs['errorBorder']
+                : null,
+            focusedBorder: namedArgs.containsKey('focusedBorder')
+                ? namedArgs['focusedBorder']
+                : null,
+            focusedErrorBorder: namedArgs.containsKey('focusedErrorBorder')
+                ? namedArgs['focusedErrorBorder']
+                : null,
+            disabledBorder: namedArgs.containsKey('disabledBorder')
+                ? namedArgs['disabledBorder']
+                : null,
+            enabledBorder: namedArgs.containsKey('enabledBorder')
+                ? namedArgs['enabledBorder']
+                : null,
+            border:
+                namedArgs.containsKey('border') ? namedArgs['border'] : null,
+            alignLabelWithHint: namedArgs.containsKey('alignLabelWithHint')
+                ? namedArgs['alignLabelWithHint']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/list_tile.g.dart b/lib/bindings/flutter/material/list_tile.g.dart
index db76960..3b4c9f5 100644
--- a/lib/bindings/flutter/material/list_tile.g.dart
+++ b/lib/bindings/flutter/material/list_tile.g.dart
@@ -17,7 +17,7 @@ class ListTileStyleAutoBinding extends HTExternalClass {
       case 'ListTileStyle.drawer':
         return ListTileStyle.drawer;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class ListTileStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListTileStyle');
+        return const HTType('ListTileStyle');
       case 'index':
         return (instance as ListTileStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ListTileStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ListTileStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,7 +52,7 @@ class ListTileControlAffinityAutoBinding extends HTExternalClass {
       case 'ListTileControlAffinity.platform':
         return ListTileControlAffinity.platform;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -59,13 +60,14 @@ class ListTileControlAffinityAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListTileControlAffinity');
+        return const HTType('ListTileControlAffinity');
       case 'index':
         return (instance as ListTileControlAffinity).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ListTileControlAffinity).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ListTileControlAffinity).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -81,17 +83,39 @@ class ListTileThemeAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : false,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : ListTileStyle.list,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            iconColor: namedArgs.containsKey('iconColor') ? namedArgs['iconColor'] : null,
-            textColor: namedArgs.containsKey('textColor') ? namedArgs['textColor'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            tileColor: namedArgs.containsKey('tileColor') ? namedArgs['tileColor'] : null,
-            selectedTileColor: namedArgs.containsKey('selectedTileColor') ? namedArgs['selectedTileColor'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            horizontalTitleGap: namedArgs.containsKey('horizontalTitleGap') ? namedArgs['horizontalTitleGap'] : null,
-            minVerticalPadding: namedArgs.containsKey('minVerticalPadding') ? namedArgs['minVerticalPadding'] : null,
-            minLeadingWidth: namedArgs.containsKey('minLeadingWidth') ? namedArgs['minLeadingWidth'] : null,
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : ListTileStyle.list,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            iconColor: namedArgs.containsKey('iconColor')
+                ? namedArgs['iconColor']
+                : null,
+            textColor: namedArgs.containsKey('textColor')
+                ? namedArgs['textColor']
+                : null,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            tileColor: namedArgs.containsKey('tileColor')
+                ? namedArgs['tileColor']
+                : null,
+            selectedTileColor: namedArgs.containsKey('selectedTileColor')
+                ? namedArgs['selectedTileColor']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null,
+            horizontalTitleGap: namedArgs.containsKey('horizontalTitleGap')
+                ? namedArgs['horizontalTitleGap']
+                : null,
+            minVerticalPadding: namedArgs.containsKey('minVerticalPadding')
+                ? namedArgs['minVerticalPadding']
+                : null,
+            minLeadingWidth: namedArgs.containsKey('minLeadingWidth')
+                ? namedArgs['minLeadingWidth']
+                : null,
             child: namedArgs['child']);
       case 'ListTileTheme.merge':
         return ({positionalArgs, namedArgs, typeArgs}) => ListTileTheme.merge(
@@ -99,21 +123,42 @@ class ListTileThemeAutoBinding extends HTExternalClass {
             dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            iconColor: namedArgs.containsKey('iconColor') ? namedArgs['iconColor'] : null,
-            textColor: namedArgs.containsKey('textColor') ? namedArgs['textColor'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            tileColor: namedArgs.containsKey('tileColor') ? namedArgs['tileColor'] : null,
-            selectedTileColor: namedArgs.containsKey('selectedTileColor') ? namedArgs['selectedTileColor'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            horizontalTitleGap: namedArgs.containsKey('horizontalTitleGap') ? namedArgs['horizontalTitleGap'] : null,
-            minVerticalPadding: namedArgs.containsKey('minVerticalPadding') ? namedArgs['minVerticalPadding'] : null,
-            minLeadingWidth: namedArgs.containsKey('minLeadingWidth') ? namedArgs['minLeadingWidth'] : null,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            iconColor: namedArgs.containsKey('iconColor')
+                ? namedArgs['iconColor']
+                : null,
+            textColor: namedArgs.containsKey('textColor')
+                ? namedArgs['textColor']
+                : null,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            tileColor: namedArgs.containsKey('tileColor')
+                ? namedArgs['tileColor']
+                : null,
+            selectedTileColor: namedArgs.containsKey('selectedTileColor')
+                ? namedArgs['selectedTileColor']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null,
+            horizontalTitleGap: namedArgs.containsKey('horizontalTitleGap')
+                ? namedArgs['horizontalTitleGap']
+                : null,
+            minVerticalPadding: namedArgs.containsKey('minVerticalPadding')
+                ? namedArgs['minVerticalPadding']
+                : null,
+            minLeadingWidth: namedArgs.containsKey('minLeadingWidth')
+                ? namedArgs['minLeadingWidth']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'ListTileTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ListTileTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ListTileTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -127,7 +172,7 @@ extension ListTileThemeBinding on ListTileTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListTileTheme');
+        return const HTType('ListTileTheme');
       case 'dense':
         return dense;
       case 'shape':
@@ -161,33 +206,47 @@ extension ListTileThemeBinding on ListTileTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -201,37 +260,76 @@ class ListTileAutoBinding extends HTExternalClass {
       case 'ListTile':
         return ({positionalArgs, namedArgs, typeArgs}) => ListTile(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            subtitle: namedArgs.containsKey('subtitle') ? namedArgs['subtitle'] : null,
-            trailing: namedArgs.containsKey('trailing') ? namedArgs['trailing'] : null,
-            isThreeLine: namedArgs.containsKey('isThreeLine') ? namedArgs['isThreeLine'] : false,
+            subtitle: namedArgs.containsKey('subtitle')
+                ? namedArgs['subtitle']
+                : null,
+            trailing: namedArgs.containsKey('trailing')
+                ? namedArgs['trailing']
+                : null,
+            isThreeLine: namedArgs.containsKey('isThreeLine')
+                ? namedArgs['isThreeLine']
+                : false,
             dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : true,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            enabled:
+                namedArgs.containsKey('enabled') ? namedArgs['enabled'] : true,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            tileColor: namedArgs.containsKey('tileColor') ? namedArgs['tileColor'] : null,
-            selectedTileColor: namedArgs.containsKey('selectedTileColor') ? namedArgs['selectedTileColor'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            horizontalTitleGap: namedArgs.containsKey('horizontalTitleGap') ? namedArgs['horizontalTitleGap'] : null,
-            minVerticalPadding: namedArgs.containsKey('minVerticalPadding') ? namedArgs['minVerticalPadding'] : null,
-            minLeadingWidth: namedArgs.containsKey('minLeadingWidth') ? namedArgs['minLeadingWidth'] : null);
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            tileColor: namedArgs.containsKey('tileColor')
+                ? namedArgs['tileColor']
+                : null,
+            selectedTileColor: namedArgs.containsKey('selectedTileColor')
+                ? namedArgs['selectedTileColor']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null,
+            horizontalTitleGap: namedArgs.containsKey('horizontalTitleGap')
+                ? namedArgs['horizontalTitleGap']
+                : null,
+            minVerticalPadding: namedArgs.containsKey('minVerticalPadding')
+                ? namedArgs['minVerticalPadding']
+                : null,
+            minLeadingWidth: namedArgs.containsKey('minLeadingWidth')
+                ? namedArgs['minLeadingWidth']
+                : null);
       case 'ListTile.divideTiles':
         return ({positionalArgs, namedArgs, typeArgs}) => ListTile.divideTiles(
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
+            context:
+                namedArgs.containsKey('context') ? namedArgs['context'] : null,
             tiles: namedArgs.containsKey('tiles') ? namedArgs['tiles'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -242,7 +340,8 @@ class ListTileAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
       'GestureLongPressCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
@@ -253,7 +352,7 @@ extension ListTileBinding on ListTile {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListTile');
+        return const HTType('ListTile');
       case 'leading':
         return leading;
       case 'title':
@@ -307,31 +406,44 @@ extension ListTileBinding on ListTile {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/material.g.dart b/lib/bindings/flutter/material/material.g.dart
index 17e895d..ecb48b3 100644
--- a/lib/bindings/flutter/material/material.g.dart
+++ b/lib/bindings/flutter/material/material.g.dart
@@ -23,7 +23,7 @@ class MaterialTypeAutoBinding extends HTExternalClass {
       case 'MaterialType.transparency':
         return MaterialType.transparency;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,13 +31,14 @@ class MaterialTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialType');
+        return const HTType('MaterialType');
       case 'index':
         return (instance as MaterialType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as MaterialType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as MaterialType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,24 +52,40 @@ class MaterialAutoBinding extends HTExternalClass {
       case 'Material':
         return ({positionalArgs, namedArgs, typeArgs}) => Material(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            type: namedArgs.containsKey('type') ? namedArgs['type'] : MaterialType.canvas,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 0.0,
+            type: namedArgs.containsKey('type')
+                ? namedArgs['type']
+                : MaterialType.canvas,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 0.0,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            borderOnForeground: namedArgs.containsKey('borderOnForeground') ? namedArgs['borderOnForeground'] : true,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            animationDuration:
-                namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : kThemeChangeDuration,
+            borderOnForeground: namedArgs.containsKey('borderOnForeground')
+                ? namedArgs['borderOnForeground']
+                : true,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            animationDuration: namedArgs.containsKey('animationDuration')
+                ? namedArgs['animationDuration']
+                : kThemeChangeDuration,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'Material.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Material.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Material.of(positionalArgs[0]);
       case 'Material.defaultSplashRadius':
         return Material.defaultSplashRadius;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -82,7 +99,7 @@ extension MaterialBinding on Material {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Material');
+        return const HTType('Material');
       case 'child':
         return child;
       case 'type':
@@ -112,29 +129,41 @@ extension MaterialBinding on Material {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -150,7 +179,7 @@ class ShapeBorderTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -169,25 +198,30 @@ extension ShapeBorderTweenBinding on ShapeBorderTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShapeBorderTween');
+        return const HTType('ShapeBorderTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -200,7 +234,7 @@ extension ShapeBorderTweenBinding on ShapeBorderTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/material_button.g.dart b/lib/bindings/flutter/material/material_button.g.dart
index 3a02e06..75a136f 100644
--- a/lib/bindings/flutter/material/material_button.g.dart
+++ b/lib/bindings/flutter/material/material_button.g.dart
@@ -15,39 +15,91 @@ class MaterialButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => MaterialButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onHighlightChanged: namedArgs.containsKey('onHighlightChanged') ? namedArgs['onHighlightChanged'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            textColor: namedArgs.containsKey('textColor') ? namedArgs['textColor'] : null,
-            disabledTextColor: namedArgs.containsKey('disabledTextColor') ? namedArgs['disabledTextColor'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            onHighlightChanged: namedArgs.containsKey('onHighlightChanged')
+                ? namedArgs['onHighlightChanged']
+                : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            textColor: namedArgs.containsKey('textColor')
+                ? namedArgs['textColor']
+                : null,
+            disabledTextColor: namedArgs.containsKey('disabledTextColor')
+                ? namedArgs['disabledTextColor']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            colorBrightness: namedArgs.containsKey('colorBrightness') ? namedArgs['colorBrightness'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            focusElevation: namedArgs.containsKey('focusElevation') ? namedArgs['focusElevation'] : null,
-            hoverElevation: namedArgs.containsKey('hoverElevation') ? namedArgs['hoverElevation'] : null,
-            highlightElevation: namedArgs.containsKey('highlightElevation') ? namedArgs['highlightElevation'] : null,
-            disabledElevation: namedArgs.containsKey('disabledElevation') ? namedArgs['disabledElevation'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            colorBrightness: namedArgs.containsKey('colorBrightness')
+                ? namedArgs['colorBrightness']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            focusElevation: namedArgs.containsKey('focusElevation')
+                ? namedArgs['focusElevation']
+                : null,
+            hoverElevation: namedArgs.containsKey('hoverElevation')
+                ? namedArgs['hoverElevation']
+                : null,
+            highlightElevation: namedArgs.containsKey('highlightElevation')
+                ? namedArgs['highlightElevation']
+                : null,
+            disabledElevation: namedArgs.containsKey('disabledElevation')
+                ? namedArgs['disabledElevation']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            animationDuration: namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : null,
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : true,
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            animationDuration: namedArgs.containsKey('animationDuration')
+                ? namedArgs['animationDuration']
+                : null,
+            minWidth: namedArgs.containsKey('minWidth')
+                ? namedArgs['minWidth']
+                : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -58,7 +110,8 @@ class MaterialButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -67,7 +120,7 @@ extension MaterialButtonBinding on MaterialButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialButton');
+        return const HTType('MaterialButton');
       case 'onPressed':
         return onPressed;
       case 'onLongPress':
@@ -137,31 +190,44 @@ extension MaterialButtonBinding on MaterialButton {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/material_localizations.g.dart b/lib/bindings/flutter/material/material_localizations.g.dart
index ad89e20..25a3f38 100644
--- a/lib/bindings/flutter/material/material_localizations.g.dart
+++ b/lib/bindings/flutter/material/material_localizations.g.dart
@@ -8,27 +8,31 @@ class MaterialLocalizationsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialLocalizations.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialLocalizations.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialLocalizations.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DefaultMaterialLocalizationsAutoBinding extends HTExternalClass {
-  DefaultMaterialLocalizationsAutoBinding() : super('DefaultMaterialLocalizations');
+  DefaultMaterialLocalizationsAutoBinding()
+      : super('DefaultMaterialLocalizations');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DefaultMaterialLocalizations':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultMaterialLocalizations();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultMaterialLocalizations();
       case 'DefaultMaterialLocalizations.load':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultMaterialLocalizations.load(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultMaterialLocalizations.load(positionalArgs[0]);
       case 'DefaultMaterialLocalizations.delegate':
         return DefaultMaterialLocalizations.delegate;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -42,7 +46,7 @@ extension DefaultMaterialLocalizationsBinding on DefaultMaterialLocalizations {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultMaterialLocalizations');
+        return const HTType('DefaultMaterialLocalizations');
       case 'narrowWeekdays':
         return narrowWeekdays;
       case 'firstDayOfWeekIndex':
@@ -182,58 +186,89 @@ extension DefaultMaterialLocalizationsBinding on DefaultMaterialLocalizations {
       case 'refreshIndicatorSemanticLabel':
         return refreshIndicatorSemanticLabel;
       case 'formatHour':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatHour(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => formatHour(
+            positionalArgs[0],
             alwaysUse24HourFormat:
-                namedArgs.containsKey('alwaysUse24HourFormat') ? namedArgs['alwaysUse24HourFormat'] : false);
+                namedArgs.containsKey('alwaysUse24HourFormat')
+                    ? namedArgs['alwaysUse24HourFormat']
+                    : false);
       case 'formatMinute':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatMinute(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatMinute(positionalArgs[0]);
       case 'formatYear':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatYear(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatYear(positionalArgs[0]);
       case 'formatCompactDate':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatCompactDate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatCompactDate(positionalArgs[0]);
       case 'formatShortDate':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatShortDate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatShortDate(positionalArgs[0]);
       case 'formatMediumDate':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatMediumDate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatMediumDate(positionalArgs[0]);
       case 'formatFullDate':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatFullDate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatFullDate(positionalArgs[0]);
       case 'formatMonthYear':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatMonthYear(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatMonthYear(positionalArgs[0]);
       case 'formatShortMonthDay':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatShortMonthDay(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatShortMonthDay(positionalArgs[0]);
       case 'parseCompactDate':
-        return ({positionalArgs, namedArgs, typeArgs}) => parseCompactDate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            parseCompactDate(positionalArgs[0]);
       case 'dateRangeStartDateSemanticLabel':
-        return ({positionalArgs, namedArgs, typeArgs}) => dateRangeStartDateSemanticLabel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dateRangeStartDateSemanticLabel(positionalArgs[0]);
       case 'dateRangeEndDateSemanticLabel':
-        return ({positionalArgs, namedArgs, typeArgs}) => dateRangeEndDateSemanticLabel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dateRangeEndDateSemanticLabel(positionalArgs[0]);
       case 'formatDecimal':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatDecimal(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatDecimal(positionalArgs[0]);
       case 'formatTimeOfDay':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatTimeOfDay(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => formatTimeOfDay(
+            positionalArgs[0],
             alwaysUse24HourFormat:
-                namedArgs.containsKey('alwaysUse24HourFormat') ? namedArgs['alwaysUse24HourFormat'] : false);
+                namedArgs.containsKey('alwaysUse24HourFormat')
+                    ? namedArgs['alwaysUse24HourFormat']
+                    : false);
       case 'aboutListTileTitle':
-        return ({positionalArgs, namedArgs, typeArgs}) => aboutListTileTitle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            aboutListTileTitle(positionalArgs[0]);
       case 'licensesPackageDetailText':
-        return ({positionalArgs, namedArgs, typeArgs}) => licensesPackageDetailText(positionalArgs[0]);
-      case 'pageRowsInfoTitle':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            pageRowsInfoTitle(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            licensesPackageDetailText(positionalArgs[0]);
+      case 'pageRowsInfoTitle':
+        return ({positionalArgs, namedArgs, typeArgs}) => pageRowsInfoTitle(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'tabLabel':
         return ({positionalArgs, namedArgs, typeArgs}) => tabLabel(
-            tabIndex: namedArgs.containsKey('tabIndex') ? namedArgs['tabIndex'] : null,
-            tabCount: namedArgs.containsKey('tabCount') ? namedArgs['tabCount'] : null);
+            tabIndex: namedArgs.containsKey('tabIndex')
+                ? namedArgs['tabIndex']
+                : null,
+            tabCount: namedArgs.containsKey('tabCount')
+                ? namedArgs['tabCount']
+                : null);
       case 'selectedRowCountTitle':
-        return ({positionalArgs, namedArgs, typeArgs}) => selectedRowCountTitle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            selectedRowCountTitle(positionalArgs[0]);
       case 'timeOfDayFormat':
         return ({positionalArgs, namedArgs, typeArgs}) => timeOfDayFormat(
             alwaysUse24HourFormat:
-                namedArgs.containsKey('alwaysUse24HourFormat') ? namedArgs['alwaysUse24HourFormat'] : false);
+                namedArgs.containsKey('alwaysUse24HourFormat')
+                    ? namedArgs['alwaysUse24HourFormat']
+                    : false);
       case 'remainingTextFieldCharacterCount':
-        return ({positionalArgs, namedArgs, typeArgs}) => remainingTextFieldCharacterCount(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remainingTextFieldCharacterCount(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/material_state.g.dart b/lib/bindings/flutter/material/material_state.g.dart
index e22715c..3f0aaf2 100644
--- a/lib/bindings/flutter/material/material_state.g.dart
+++ b/lib/bindings/flutter/material/material_state.g.dart
@@ -24,7 +24,7 @@ class MaterialStateAutoBinding extends HTExternalClass {
       case 'MaterialState.error':
         return MaterialState.error;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,13 +32,14 @@ class MaterialStateAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialState');
+        return const HTType('MaterialState');
       case 'index':
         return (instance as MaterialState).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as MaterialState).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as MaterialState).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/mergeable_material.g.dart b/lib/bindings/flutter/material/mergeable_material.g.dart
index 4b2c192..9531bb5 100644
--- a/lib/bindings/flutter/material/mergeable_material.g.dart
+++ b/lib/bindings/flutter/material/mergeable_material.g.dart
@@ -15,7 +15,7 @@ class MaterialSliceAutoBinding extends HTExternalClass {
             child: namedArgs['child'],
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +29,7 @@ extension MaterialSliceBinding on MaterialSlice {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialSlice');
+        return const HTType('MaterialSlice');
       case 'child':
         return child;
       case 'color':
@@ -39,7 +39,7 @@ extension MaterialSliceBinding on MaterialSlice {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,10 +51,11 @@ class MaterialGapAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialGap':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            MaterialGap(key: namedArgs['key'], size: namedArgs.containsKey('size') ? namedArgs['size'] : 16.0);
+        return ({positionalArgs, namedArgs, typeArgs}) => MaterialGap(
+            key: namedArgs['key'],
+            size: namedArgs.containsKey('size') ? namedArgs['size'] : 16.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -68,7 +69,7 @@ extension MaterialGapBinding on MaterialGap {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialGap');
+        return const HTType('MaterialGap');
       case 'size':
         return size;
       case 'key':
@@ -76,7 +77,7 @@ extension MaterialGapBinding on MaterialGap {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,15 +91,22 @@ class MergeableMaterialAutoBinding extends HTExternalClass {
       case 'MergeableMaterial':
         return ({positionalArgs, namedArgs, typeArgs}) => MergeableMaterial(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            mainAxis: namedArgs.containsKey('mainAxis') ? namedArgs['mainAxis'] : Axis.vertical,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 2,
-            hasDividers: namedArgs.containsKey('hasDividers') ? namedArgs['hasDividers'] : false,
+            mainAxis: namedArgs.containsKey('mainAxis')
+                ? namedArgs['mainAxis']
+                : Axis.vertical,
+            elevation:
+                namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 2,
+            hasDividers: namedArgs.containsKey('hasDividers')
+                ? namedArgs['hasDividers']
+                : false,
             children: namedArgs.containsKey('children')
                 ? List<MergeableMaterialItem>.from(namedArgs['children'])
                 : const <MergeableMaterialItem>[],
-            dividerColor: namedArgs.containsKey('dividerColor') ? namedArgs['dividerColor'] : null);
+            dividerColor: namedArgs.containsKey('dividerColor')
+                ? namedArgs['dividerColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -112,7 +120,7 @@ extension MergeableMaterialBinding on MergeableMaterial {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MergeableMaterial');
+        return const HTType('MergeableMaterial');
       case 'children':
         return children;
       case 'mainAxis':
@@ -128,7 +136,8 @@ extension MergeableMaterialBinding on MergeableMaterial {
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'createElement':
@@ -137,22 +146,33 @@ extension MergeableMaterialBinding on MergeableMaterial {
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/navigation_rail.g.dart b/lib/bindings/flutter/material/navigation_rail.g.dart
index e178979..9067074 100644
--- a/lib/bindings/flutter/material/navigation_rail.g.dart
+++ b/lib/bindings/flutter/material/navigation_rail.g.dart
@@ -17,7 +17,7 @@ class NavigationRailLabelTypeAutoBinding extends HTExternalClass {
       case 'NavigationRailLabelType.all':
         return NavigationRailLabelType.all;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class NavigationRailLabelTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigationRailLabelType');
+        return const HTType('NavigationRailLabelType');
       case 'index':
         return (instance as NavigationRailLabelType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as NavigationRailLabelType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as NavigationRailLabelType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,29 +45,58 @@ class NavigationRailAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'NavigationRail':
         return ({positionalArgs, namedArgs, typeArgs}) => NavigationRail(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            extended: namedArgs.containsKey('extended') ? namedArgs['extended'] : false,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
-            trailing: namedArgs.containsKey('trailing') ? namedArgs['trailing'] : null,
-            destinations: List<NavigationRailDestination>.from(namedArgs['destinations']),
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            extended: namedArgs.containsKey('extended')
+                ? namedArgs['extended']
+                : false,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            trailing: namedArgs.containsKey('trailing')
+                ? namedArgs['trailing']
+                : null,
+            destinations:
+                List<NavigationRailDestination>.from(namedArgs['destinations']),
             selectedIndex: namedArgs['selectedIndex'],
             onDestinationSelected:
-                namedArgs.containsKey('onDestinationSelected') ? namedArgs['onDestinationSelected'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            groupAlignment: namedArgs.containsKey('groupAlignment') ? namedArgs['groupAlignment'] : null,
-            labelType: namedArgs.containsKey('labelType') ? namedArgs['labelType'] : null,
+                namedArgs.containsKey('onDestinationSelected')
+                    ? namedArgs['onDestinationSelected']
+                    : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            groupAlignment: namedArgs.containsKey('groupAlignment')
+                ? namedArgs['groupAlignment']
+                : null,
+            labelType: namedArgs.containsKey('labelType')
+                ? namedArgs['labelType']
+                : null,
             unselectedLabelTextStyle:
-                namedArgs.containsKey('unselectedLabelTextStyle') ? namedArgs['unselectedLabelTextStyle'] : null,
+                namedArgs.containsKey('unselectedLabelTextStyle')
+                    ? namedArgs['unselectedLabelTextStyle']
+                    : null,
             selectedLabelTextStyle:
-                namedArgs.containsKey('selectedLabelTextStyle') ? namedArgs['selectedLabelTextStyle'] : null,
-            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme') ? namedArgs['unselectedIconTheme'] : null,
-            selectedIconTheme: namedArgs.containsKey('selectedIconTheme') ? namedArgs['selectedIconTheme'] : null,
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : null,
-            minExtendedWidth: namedArgs.containsKey('minExtendedWidth') ? namedArgs['minExtendedWidth'] : null);
+                namedArgs.containsKey('selectedLabelTextStyle')
+                    ? namedArgs['selectedLabelTextStyle']
+                    : null,
+            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme')
+                ? namedArgs['unselectedIconTheme']
+                : null,
+            selectedIconTheme: namedArgs.containsKey('selectedIconTheme')
+                ? namedArgs['selectedIconTheme']
+                : null,
+            minWidth: namedArgs.containsKey('minWidth')
+                ? namedArgs['minWidth']
+                : null,
+            minExtendedWidth: namedArgs.containsKey('minExtendedWidth')
+                ? namedArgs['minExtendedWidth']
+                : null);
       case 'NavigationRail.extendedAnimation':
-        return ({positionalArgs, namedArgs, typeArgs}) => NavigationRail.extendedAnimation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NavigationRail.extendedAnimation(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,7 +110,7 @@ extension NavigationRailBinding on NavigationRail {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigationRail');
+        return const HTType('NavigationRail');
       case 'backgroundColor':
         return backgroundColor;
       case 'extended':
@@ -124,25 +154,37 @@ extension NavigationRailBinding on NavigationRail {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -154,13 +196,19 @@ class NavigationRailDestinationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NavigationRailDestination':
-        return ({positionalArgs, namedArgs, typeArgs}) => NavigationRailDestination(
-            icon: namedArgs['icon'],
-            selectedIcon: namedArgs.containsKey('selectedIcon') ? namedArgs['selectedIcon'] : null,
-            label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NavigationRailDestination(
+                icon: namedArgs['icon'],
+                selectedIcon: namedArgs.containsKey('selectedIcon')
+                    ? namedArgs['selectedIcon']
+                    : null,
+                label:
+                    namedArgs.containsKey('label') ? namedArgs['label'] : null,
+                padding: namedArgs.containsKey('padding')
+                    ? namedArgs['padding']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -174,7 +222,7 @@ extension NavigationRailDestinationBinding on NavigationRailDestination {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigationRailDestination');
+        return const HTType('NavigationRailDestination');
       case 'icon':
         return icon;
       case 'selectedIcon':
@@ -184,7 +232,7 @@ extension NavigationRailDestinationBinding on NavigationRailDestination {
       case 'padding':
         return padding;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/navigation_rail_theme.g.dart b/lib/bindings/flutter/material/navigation_rail_theme.g.dart
index 8c69c23..fdd972e 100644
--- a/lib/bindings/flutter/material/navigation_rail_theme.g.dart
+++ b/lib/bindings/flutter/material/navigation_rail_theme.g.dart
@@ -11,22 +11,44 @@ class NavigationRailThemeDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NavigationRailThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => NavigationRailThemeData(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            unselectedLabelTextStyle:
-                namedArgs.containsKey('unselectedLabelTextStyle') ? namedArgs['unselectedLabelTextStyle'] : null,
-            selectedLabelTextStyle:
-                namedArgs.containsKey('selectedLabelTextStyle') ? namedArgs['selectedLabelTextStyle'] : null,
-            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme') ? namedArgs['unselectedIconTheme'] : null,
-            selectedIconTheme: namedArgs.containsKey('selectedIconTheme') ? namedArgs['selectedIconTheme'] : null,
-            groupAlignment: namedArgs.containsKey('groupAlignment') ? namedArgs['groupAlignment'] : null,
-            labelType: namedArgs.containsKey('labelType') ? namedArgs['labelType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NavigationRailThemeData(
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                elevation: namedArgs.containsKey('elevation')
+                    ? namedArgs['elevation']
+                    : null,
+                unselectedLabelTextStyle:
+                    namedArgs.containsKey(
+                            'unselectedLabelTextStyle')
+                        ? namedArgs['unselectedLabelTextStyle']
+                        : null,
+                selectedLabelTextStyle:
+                    namedArgs.containsKey(
+                            'selectedLabelTextStyle')
+                        ? namedArgs['selectedLabelTextStyle']
+                        : null,
+                unselectedIconTheme:
+                    namedArgs
+                            .containsKey('unselectedIconTheme')
+                        ? namedArgs['unselectedIconTheme']
+                        : null,
+                selectedIconTheme: namedArgs.containsKey('selectedIconTheme')
+                    ? namedArgs['selectedIconTheme']
+                    : null,
+                groupAlignment: namedArgs.containsKey('groupAlignment')
+                    ? namedArgs['groupAlignment']
+                    : null,
+                labelType: namedArgs.containsKey('labelType')
+                    ? namedArgs['labelType']
+                    : null);
       case 'NavigationRailThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            NavigationRailThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            NavigationRailThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -40,7 +62,7 @@ extension NavigationRailThemeDataBinding on NavigationRailThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigationRailThemeData');
+        return const HTType('NavigationRailThemeData');
       case 'backgroundColor':
         return backgroundColor;
       case 'elevation':
@@ -61,29 +83,48 @@ extension NavigationRailThemeDataBinding on NavigationRailThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             unselectedLabelTextStyle:
-                namedArgs.containsKey('unselectedLabelTextStyle') ? namedArgs['unselectedLabelTextStyle'] : null,
+                namedArgs.containsKey('unselectedLabelTextStyle')
+                    ? namedArgs['unselectedLabelTextStyle']
+                    : null,
             selectedLabelTextStyle:
-                namedArgs.containsKey('selectedLabelTextStyle') ? namedArgs['selectedLabelTextStyle'] : null,
-            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme') ? namedArgs['unselectedIconTheme'] : null,
-            selectedIconTheme: namedArgs.containsKey('selectedIconTheme') ? namedArgs['selectedIconTheme'] : null,
-            groupAlignment: namedArgs.containsKey('groupAlignment') ? namedArgs['groupAlignment'] : null,
-            labelType: namedArgs.containsKey('labelType') ? namedArgs['labelType'] : null);
+                namedArgs.containsKey('selectedLabelTextStyle')
+                    ? namedArgs['selectedLabelTextStyle']
+                    : null,
+            unselectedIconTheme: namedArgs.containsKey('unselectedIconTheme')
+                ? namedArgs['unselectedIconTheme']
+                : null,
+            selectedIconTheme: namedArgs.containsKey('selectedIconTheme')
+                ? namedArgs['selectedIconTheme']
+                : null,
+            groupAlignment: namedArgs.containsKey('groupAlignment')
+                ? namedArgs['groupAlignment']
+                : null,
+            labelType: namedArgs.containsKey('labelType')
+                ? namedArgs['labelType']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -100,9 +141,10 @@ class NavigationRailThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'NavigationRailTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => NavigationRailTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NavigationRailTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -116,7 +158,7 @@ extension NavigationRailThemeBinding on NavigationRailTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigationRailTheme');
+        return const HTType('NavigationRailTheme');
       case 'data':
         return data;
       case 'child':
@@ -126,33 +168,47 @@ extension NavigationRailThemeBinding on NavigationRailTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/outlined_button.g.dart b/lib/bindings/flutter/material/outlined_button.g.dart
index 577d3a2..5f092e3 100644
--- a/lib/bindings/flutter/material/outlined_button.g.dart
+++ b/lib/bindings/flutter/material/outlined_button.g.dart
@@ -15,44 +15,93 @@ class OutlinedButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => OutlinedButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             child: namedArgs['child']);
       case 'OutlinedButton.icon':
         return ({positionalArgs, namedArgs, typeArgs}) => OutlinedButton.icon(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
             icon: namedArgs['icon'],
             label: namedArgs['label']);
       case 'OutlinedButton.styleFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => OutlinedButton.styleFrom(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            minimumSize: namedArgs.containsKey('minimumSize') ? namedArgs['minimumSize'] : null,
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            enabledMouseCursor: namedArgs.containsKey('enabledMouseCursor') ? namedArgs['enabledMouseCursor'] : null,
-            disabledMouseCursor: namedArgs.containsKey('disabledMouseCursor') ? namedArgs['disabledMouseCursor'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            tapTargetSize: namedArgs.containsKey('tapTargetSize') ? namedArgs['tapTargetSize'] : null,
-            animationDuration: namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OutlinedButton.styleFrom(
+                primary: namedArgs.containsKey('primary')
+                    ? namedArgs['primary']
+                    : null,
+                onSurface: namedArgs.containsKey('onSurface')
+                    ? namedArgs['onSurface']
+                    : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                shadowColor: namedArgs.containsKey('shadowColor')
+                    ? namedArgs['shadowColor']
+                    : null,
+                elevation: namedArgs.containsKey('elevation')
+                    ? namedArgs['elevation']
+                    : null,
+                textStyle: namedArgs.containsKey('textStyle')
+                    ? namedArgs['textStyle']
+                    : null,
+                padding: namedArgs.containsKey('padding')
+                    ? namedArgs['padding']
+                    : null,
+                minimumSize: namedArgs.containsKey('minimumSize')
+                    ? namedArgs['minimumSize']
+                    : null,
+                side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
+                shape:
+                    namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
+                enabledMouseCursor: namedArgs.containsKey('enabledMouseCursor')
+                    ? namedArgs['enabledMouseCursor']
+                    : null,
+                disabledMouseCursor:
+                    namedArgs.containsKey('disabledMouseCursor')
+                        ? namedArgs['disabledMouseCursor']
+                        : null,
+                visualDensity: namedArgs.containsKey('visualDensity')
+                    ? namedArgs['visualDensity']
+                    : null,
+                tapTargetSize: namedArgs.containsKey('tapTargetSize')
+                    ? namedArgs['tapTargetSize']
+                    : null,
+                animationDuration: namedArgs.containsKey('animationDuration')
+                    ? namedArgs['animationDuration']
+                    : null,
+                enableFeedback: namedArgs.containsKey('enableFeedback')
+                    ? namedArgs['enableFeedback']
+                    : null,
+                alignment: namedArgs.containsKey('alignment')
+                    ? namedArgs['alignment']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,7 +112,8 @@ class OutlinedButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -72,7 +122,7 @@ extension OutlinedButtonBinding on OutlinedButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OutlinedButton');
+        return const HTType('OutlinedButton');
       case 'onPressed':
         return onPressed;
       case 'onLongPress':
@@ -94,35 +144,49 @@ extension OutlinedButtonBinding on OutlinedButton {
       case 'hashCode':
         return hashCode;
       case 'defaultStyleOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultStyleOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultStyleOf(positionalArgs[0]);
       case 'themeStyleOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => themeStyleOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            themeStyleOf(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/outlined_button_theme.g.dart b/lib/bindings/flutter/material/outlined_button_theme.g.dart
index f186940..332bb66 100644
--- a/lib/bindings/flutter/material/outlined_button_theme.g.dart
+++ b/lib/bindings/flutter/material/outlined_button_theme.g.dart
@@ -11,12 +11,15 @@ class OutlinedButtonThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'OutlinedButtonThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            OutlinedButtonThemeData(style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
+            OutlinedButtonThemeData(
+                style:
+                    namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'OutlinedButtonThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            OutlinedButtonThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            OutlinedButtonThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,24 +33,27 @@ extension OutlinedButtonThemeDataBinding on OutlinedButtonThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OutlinedButtonThemeData');
+        return const HTType('OutlinedButtonThemeData');
       case 'style':
         return style;
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -64,9 +70,10 @@ class OutlinedButtonThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'OutlinedButtonTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => OutlinedButtonTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OutlinedButtonTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,7 +87,7 @@ extension OutlinedButtonThemeBinding on OutlinedButtonTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OutlinedButtonTheme');
+        return const HTType('OutlinedButtonTheme');
       case 'data':
         return data;
       case 'child':
@@ -90,33 +97,47 @@ extension OutlinedButtonThemeBinding on OutlinedButtonTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/page_transitions_theme.g.dart b/lib/bindings/flutter/material/page_transitions_theme.g.dart
index 52c11f5..1c993b5 100644
--- a/lib/bindings/flutter/material/page_transitions_theme.g.dart
+++ b/lib/bindings/flutter/material/page_transitions_theme.g.dart
@@ -5,15 +5,17 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 
 class FadeUpwardsPageTransitionsBuilderAutoBinding extends HTExternalClass {
-  FadeUpwardsPageTransitionsBuilderAutoBinding() : super('FadeUpwardsPageTransitionsBuilder');
+  FadeUpwardsPageTransitionsBuilderAutoBinding()
+      : super('FadeUpwardsPageTransitionsBuilder');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FadeUpwardsPageTransitionsBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => FadeUpwardsPageTransitionsBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FadeUpwardsPageTransitionsBuilder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,30 +25,37 @@ class FadeUpwardsPageTransitionsBuilderAutoBinding extends HTExternalClass {
   }
 }
 
-extension FadeUpwardsPageTransitionsBuilderBinding on FadeUpwardsPageTransitionsBuilder {
+extension FadeUpwardsPageTransitionsBuilderBinding
+    on FadeUpwardsPageTransitionsBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FadeUpwardsPageTransitionsBuilder');
+        return const HTType('FadeUpwardsPageTransitionsBuilder');
       case 'buildTransitions':
         return ({positionalArgs, namedArgs, typeArgs}) => buildTransitions(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class OpenUpwardsPageTransitionsBuilderAutoBinding extends HTExternalClass {
-  OpenUpwardsPageTransitionsBuilderAutoBinding() : super('OpenUpwardsPageTransitionsBuilder');
+  OpenUpwardsPageTransitionsBuilderAutoBinding()
+      : super('OpenUpwardsPageTransitionsBuilder');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'OpenUpwardsPageTransitionsBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => OpenUpwardsPageTransitionsBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OpenUpwardsPageTransitionsBuilder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -56,16 +65,21 @@ class OpenUpwardsPageTransitionsBuilderAutoBinding extends HTExternalClass {
   }
 }
 
-extension OpenUpwardsPageTransitionsBuilderBinding on OpenUpwardsPageTransitionsBuilder {
+extension OpenUpwardsPageTransitionsBuilderBinding
+    on OpenUpwardsPageTransitionsBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OpenUpwardsPageTransitionsBuilder');
+        return const HTType('OpenUpwardsPageTransitionsBuilder');
       case 'buildTransitions':
         return ({positionalArgs, namedArgs, typeArgs}) => buildTransitions(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -77,9 +91,10 @@ class ZoomPageTransitionsBuilderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ZoomPageTransitionsBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => ZoomPageTransitionsBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ZoomPageTransitionsBuilder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -93,26 +108,32 @@ extension ZoomPageTransitionsBuilderBinding on ZoomPageTransitionsBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ZoomPageTransitionsBuilder');
+        return const HTType('ZoomPageTransitionsBuilder');
       case 'buildTransitions':
         return ({positionalArgs, namedArgs, typeArgs}) => buildTransitions(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class CupertinoPageTransitionsBuilderAutoBinding extends HTExternalClass {
-  CupertinoPageTransitionsBuilderAutoBinding() : super('CupertinoPageTransitionsBuilder');
+  CupertinoPageTransitionsBuilderAutoBinding()
+      : super('CupertinoPageTransitionsBuilder');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CupertinoPageTransitionsBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => CupertinoPageTransitionsBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CupertinoPageTransitionsBuilder();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -122,16 +143,21 @@ class CupertinoPageTransitionsBuilderAutoBinding extends HTExternalClass {
   }
 }
 
-extension CupertinoPageTransitionsBuilderBinding on CupertinoPageTransitionsBuilder {
+extension CupertinoPageTransitionsBuilderBinding
+    on CupertinoPageTransitionsBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CupertinoPageTransitionsBuilder');
+        return const HTType('CupertinoPageTransitionsBuilder');
       case 'buildTransitions':
         return ({positionalArgs, namedArgs, typeArgs}) => buildTransitions(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -143,10 +169,12 @@ class PageTransitionsThemeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PageTransitionsTheme':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            PageTransitionsTheme(builders: namedArgs.containsKey('builders') ? namedArgs['builders'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => PageTransitionsTheme(
+            builders: namedArgs.containsKey('builders')
+                ? namedArgs['builders']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -160,27 +188,34 @@ extension PageTransitionsThemeBinding on PageTransitionsTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PageTransitionsTheme');
+        return const HTType('PageTransitionsTheme');
       case 'builders':
         return builders;
       case 'hashCode':
         return hashCode;
       case 'buildTransitions':
         return ({positionalArgs, namedArgs, typeArgs}) => buildTransitions(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/paginated_data_table.g.dart b/lib/bindings/flutter/material/paginated_data_table.g.dart
index 1947d94..bde89c6 100644
--- a/lib/bindings/flutter/material/paginated_data_table.g.dart
+++ b/lib/bindings/flutter/material/paginated_data_table.g.dart
@@ -13,21 +13,45 @@ class PaginatedDataTableAutoBinding extends HTExternalClass {
       case 'PaginatedDataTable':
         return ({positionalArgs, namedArgs, typeArgs}) => PaginatedDataTable(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            actions: namedArgs.containsKey('actions') ? List<Widget>.from(namedArgs['actions']) : null,
+            header:
+                namedArgs.containsKey('header') ? namedArgs['header'] : null,
+            actions: namedArgs.containsKey('actions')
+                ? List<Widget>.from(namedArgs['actions'])
+                : null,
             columns: List<DataColumn>.from(namedArgs['columns']),
-            sortColumnIndex: namedArgs.containsKey('sortColumnIndex') ? namedArgs['sortColumnIndex'] : null,
-            sortAscending: namedArgs.containsKey('sortAscending') ? namedArgs['sortAscending'] : true,
-            onSelectAll: namedArgs.containsKey('onSelectAll') ? namedArgs['onSelectAll'] : null,
-            dataRowHeight:
-                namedArgs.containsKey('dataRowHeight') ? namedArgs['dataRowHeight'] : kMinInteractiveDimension,
-            headingRowHeight: namedArgs.containsKey('headingRowHeight') ? namedArgs['headingRowHeight'] : 56.0,
-            horizontalMargin: namedArgs.containsKey('horizontalMargin') ? namedArgs['horizontalMargin'] : 24.0,
-            columnSpacing: namedArgs.containsKey('columnSpacing') ? namedArgs['columnSpacing'] : 56.0,
-            showCheckboxColumn: namedArgs.containsKey('showCheckboxColumn') ? namedArgs['showCheckboxColumn'] : true,
-            initialFirstRowIndex: namedArgs.containsKey('initialFirstRowIndex') ? namedArgs['initialFirstRowIndex'] : 0,
-            onPageChanged: namedArgs.containsKey('onPageChanged') ? namedArgs['onPageChanged'] : null,
-            rowsPerPage: namedArgs.containsKey('rowsPerPage') ? namedArgs['rowsPerPage'] : defaultRowsPerPage,
+            sortColumnIndex: namedArgs.containsKey('sortColumnIndex')
+                ? namedArgs['sortColumnIndex']
+                : null,
+            sortAscending: namedArgs.containsKey('sortAscending')
+                ? namedArgs['sortAscending']
+                : true,
+            onSelectAll: namedArgs.containsKey('onSelectAll')
+                ? namedArgs['onSelectAll']
+                : null,
+            dataRowHeight: namedArgs.containsKey('dataRowHeight')
+                ? namedArgs['dataRowHeight']
+                : kMinInteractiveDimension,
+            headingRowHeight: namedArgs.containsKey('headingRowHeight')
+                ? namedArgs['headingRowHeight']
+                : 56.0,
+            horizontalMargin: namedArgs.containsKey('horizontalMargin')
+                ? namedArgs['horizontalMargin']
+                : 24.0,
+            columnSpacing: namedArgs.containsKey('columnSpacing')
+                ? namedArgs['columnSpacing']
+                : 56.0,
+            showCheckboxColumn: namedArgs.containsKey('showCheckboxColumn')
+                ? namedArgs['showCheckboxColumn']
+                : true,
+            initialFirstRowIndex: namedArgs.containsKey('initialFirstRowIndex')
+                ? namedArgs['initialFirstRowIndex']
+                : 0,
+            onPageChanged: namedArgs.containsKey('onPageChanged')
+                ? namedArgs['onPageChanged']
+                : null,
+            rowsPerPage: namedArgs.containsKey('rowsPerPage')
+                ? namedArgs['rowsPerPage']
+                : defaultRowsPerPage,
             availableRowsPerPage: namedArgs.containsKey('availableRowsPerPage')
                 ? List<int>.from(namedArgs['availableRowsPerPage'])
                 : const <int>[
@@ -36,15 +60,17 @@ class PaginatedDataTableAutoBinding extends HTExternalClass {
                     defaultRowsPerPage * 5,
                     defaultRowsPerPage * 10
                   ],
-            onRowsPerPageChanged:
-                namedArgs.containsKey('onRowsPerPageChanged') ? namedArgs['onRowsPerPageChanged'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            onRowsPerPageChanged: namedArgs.containsKey('onRowsPerPageChanged')
+                ? namedArgs['onRowsPerPageChanged']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             source: namedArgs['source']);
       case 'PaginatedDataTable.defaultRowsPerPage':
         return PaginatedDataTable.defaultRowsPerPage;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -60,7 +86,7 @@ extension PaginatedDataTableBinding on PaginatedDataTable {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PaginatedDataTable');
+        return const HTType('PaginatedDataTable');
       case 'header':
         return header;
       case 'actions':
@@ -108,25 +134,37 @@ extension PaginatedDataTableBinding on PaginatedDataTable {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -138,9 +176,10 @@ class PaginatedDataTableStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PaginatedDataTableState':
-        return ({positionalArgs, namedArgs, typeArgs}) => PaginatedDataTableState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PaginatedDataTableState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -154,7 +193,7 @@ extension PaginatedDataTableStateBinding on PaginatedDataTableState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PaginatedDataTableState');
+        return const HTType('PaginatedDataTableState');
       case 'widget':
         return widget;
       case 'context':
@@ -164,26 +203,32 @@ extension PaginatedDataTableStateBinding on PaginatedDataTableState {
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'pageTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => pageTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            pageTo(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/popup_menu.g.dart b/lib/bindings/flutter/material/popup_menu.g.dart
index 9651fc6..d5f5e74 100644
--- a/lib/bindings/flutter/material/popup_menu.g.dart
+++ b/lib/bindings/flutter/material/popup_menu.g.dart
@@ -15,9 +15,11 @@ class PopupMenuDividerAutoBinding extends HTExternalClass {
       case 'PopupMenuDivider':
         return ({positionalArgs, namedArgs, typeArgs}) => PopupMenuDivider(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : _kMenuDividerHeight);
+            height: namedArgs.containsKey('height')
+                ? namedArgs['height']
+                : _kMenuDividerHeight);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +33,7 @@ extension PopupMenuDividerBinding on PopupMenuDivider {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PopupMenuDivider');
+        return const HTType('PopupMenuDivider');
       case 'height':
         return height;
       case 'key':
@@ -39,7 +41,8 @@ extension PopupMenuDividerBinding on PopupMenuDivider {
       case 'hashCode':
         return hashCode;
       case 'represents':
-        return ({positionalArgs, namedArgs, typeArgs}) => represents(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            represents(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'createElement':
@@ -47,25 +50,37 @@ extension PopupMenuDividerBinding on PopupMenuDivider {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/popup_menu_theme.g.dart b/lib/bindings/flutter/material/popup_menu_theme.g.dart
index f82a828..d91b967 100644
--- a/lib/bindings/flutter/material/popup_menu_theme.g.dart
+++ b/lib/bindings/flutter/material/popup_menu_theme.g.dart
@@ -13,14 +13,21 @@ class PopupMenuThemeDataAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => PopupMenuThemeData(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null);
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null);
       case 'PopupMenuThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            PopupMenuThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            PopupMenuThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +41,7 @@ extension PopupMenuThemeDataBinding on PopupMenuThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PopupMenuThemeData');
+        return const HTType('PopupMenuThemeData');
       case 'color':
         return color;
       case 'shape':
@@ -51,22 +58,31 @@ extension PopupMenuThemeDataBinding on PopupMenuThemeData {
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null);
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -83,9 +99,10 @@ class PopupMenuThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'PopupMenuTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => PopupMenuTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PopupMenuTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -99,7 +116,7 @@ extension PopupMenuThemeBinding on PopupMenuTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PopupMenuTheme');
+        return const HTType('PopupMenuTheme');
       case 'data':
         return data;
       case 'child':
@@ -109,33 +126,47 @@ extension PopupMenuThemeBinding on PopupMenuTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/progress_indicator.g.dart b/lib/bindings/flutter/material/progress_indicator.g.dart
index 6ff1eb4..7856814 100644
--- a/lib/bindings/flutter/material/progress_indicator.g.dart
+++ b/lib/bindings/flutter/material/progress_indicator.g.dart
@@ -11,16 +11,28 @@ class LinearProgressIndicatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LinearProgressIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => LinearProgressIndicator(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            valueColor: namedArgs.containsKey('valueColor') ? namedArgs['valueColor'] : null,
-            minHeight: namedArgs.containsKey('minHeight') ? namedArgs['minHeight'] : null,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            semanticsValue: namedArgs.containsKey('semanticsValue') ? namedArgs['semanticsValue'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LinearProgressIndicator(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                value:
+                    namedArgs.containsKey('value') ? namedArgs['value'] : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                valueColor: namedArgs.containsKey('valueColor')
+                    ? namedArgs['valueColor']
+                    : null,
+                minHeight: namedArgs.containsKey('minHeight')
+                    ? namedArgs['minHeight']
+                    : null,
+                semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                    ? namedArgs['semanticsLabel']
+                    : null,
+                semanticsValue: namedArgs.containsKey('semanticsValue')
+                    ? namedArgs['semanticsValue']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +46,7 @@ extension LinearProgressIndicatorBinding on LinearProgressIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LinearProgressIndicator');
+        return const HTType('LinearProgressIndicator');
       case 'minHeight':
         return minHeight;
       case 'value':
@@ -54,29 +66,41 @@ extension LinearProgressIndicatorBinding on LinearProgressIndicator {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -88,25 +112,55 @@ class CircularProgressIndicatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CircularProgressIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => CircularProgressIndicator(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            valueColor: namedArgs.containsKey('valueColor') ? namedArgs['valueColor'] : null,
-            strokeWidth: namedArgs.containsKey('strokeWidth') ? namedArgs['strokeWidth'] : 4.0,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            semanticsValue: namedArgs.containsKey('semanticsValue') ? namedArgs['semanticsValue'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CircularProgressIndicator(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                value: namedArgs.containsKey('value')
+                    ? namedArgs['value']
+                    : null,
+                backgroundColor: namedArgs.containsKey(
+                        'backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                valueColor: namedArgs.containsKey(
+                        'valueColor')
+                    ? namedArgs['valueColor']
+                    : null,
+                strokeWidth: namedArgs.containsKey(
+                        'strokeWidth')
+                    ? namedArgs['strokeWidth']
+                    : 4.0,
+                semanticsLabel:
+                    namedArgs
+                            .containsKey('semanticsLabel')
+                        ? namedArgs['semanticsLabel']
+                        : null,
+                semanticsValue: namedArgs.containsKey('semanticsValue')
+                    ? namedArgs['semanticsValue']
+                    : null);
       case 'CircularProgressIndicator.adaptive':
-        return ({positionalArgs, namedArgs, typeArgs}) => CircularProgressIndicator.adaptive(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            valueColor: namedArgs.containsKey('valueColor') ? namedArgs['valueColor'] : null,
-            strokeWidth: namedArgs.containsKey('strokeWidth') ? namedArgs['strokeWidth'] : 4.0,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            semanticsValue: namedArgs.containsKey('semanticsValue') ? namedArgs['semanticsValue'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CircularProgressIndicator.adaptive(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                value:
+                    namedArgs.containsKey('value') ? namedArgs['value'] : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                valueColor: namedArgs.containsKey('valueColor')
+                    ? namedArgs['valueColor']
+                    : null,
+                strokeWidth: namedArgs.containsKey('strokeWidth')
+                    ? namedArgs['strokeWidth']
+                    : 4.0,
+                semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                    ? namedArgs['semanticsLabel']
+                    : null,
+                semanticsValue: namedArgs.containsKey('semanticsValue')
+                    ? namedArgs['semanticsValue']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -120,7 +174,7 @@ extension CircularProgressIndicatorBinding on CircularProgressIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CircularProgressIndicator');
+        return const HTType('CircularProgressIndicator');
       case 'strokeWidth':
         return strokeWidth;
       case 'value':
@@ -140,29 +194,41 @@ extension CircularProgressIndicatorBinding on CircularProgressIndicator {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -174,16 +240,28 @@ class RefreshProgressIndicatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RefreshProgressIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => RefreshProgressIndicator(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            valueColor: namedArgs.containsKey('valueColor') ? namedArgs['valueColor'] : null,
-            strokeWidth: namedArgs.containsKey('strokeWidth') ? namedArgs['strokeWidth'] : 2.0,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            semanticsValue: namedArgs.containsKey('semanticsValue') ? namedArgs['semanticsValue'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RefreshProgressIndicator(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                value:
+                    namedArgs.containsKey('value') ? namedArgs['value'] : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                valueColor: namedArgs.containsKey('valueColor')
+                    ? namedArgs['valueColor']
+                    : null,
+                strokeWidth: namedArgs.containsKey('strokeWidth')
+                    ? namedArgs['strokeWidth']
+                    : 2.0,
+                semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                    ? namedArgs['semanticsLabel']
+                    : null,
+                semanticsValue: namedArgs.containsKey('semanticsValue')
+                    ? namedArgs['semanticsValue']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -197,7 +275,7 @@ extension RefreshProgressIndicatorBinding on RefreshProgressIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RefreshProgressIndicator');
+        return const HTType('RefreshProgressIndicator');
       case 'strokeWidth':
         return strokeWidth;
       case 'value':
@@ -217,29 +295,41 @@ extension RefreshProgressIndicatorBinding on RefreshProgressIndicator {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/radio_theme.g.dart b/lib/bindings/flutter/material/radio_theme.g.dart
index b65a671..3be3b4a 100644
--- a/lib/bindings/flutter/material/radio_theme.g.dart
+++ b/lib/bindings/flutter/material/radio_theme.g.dart
@@ -12,18 +12,30 @@ class RadioThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RadioThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => RadioThemeData(
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null);
       case 'RadioThemeData.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RadioThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => RadioThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,7 +49,7 @@ extension RadioThemeDataBinding on RadioThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RadioThemeData');
+        return const HTType('RadioThemeData');
       case 'mouseCursor':
         return mouseCursor;
       case 'fillColor':
@@ -54,26 +66,41 @@ extension RadioThemeDataBinding on RadioThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,9 +117,10 @@ class RadioThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'RadioTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => RadioTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RadioTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -106,7 +134,7 @@ extension RadioThemeBinding on RadioTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RadioTheme');
+        return const HTType('RadioTheme');
       case 'data':
         return data;
       case 'child':
@@ -116,31 +144,44 @@ extension RadioThemeBinding on RadioTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/range_slider.g.dart b/lib/bindings/flutter/material/range_slider.g.dart
index cc0444e..afc8715 100644
--- a/lib/bindings/flutter/material/range_slider.g.dart
+++ b/lib/bindings/flutter/material/range_slider.g.dart
@@ -15,18 +15,31 @@ class RangeSliderAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             values: namedArgs['values'],
             onChanged: namedArgs['onChanged'],
-            onChangeStart: namedArgs.containsKey('onChangeStart') ? namedArgs['onChangeStart'] : null,
-            onChangeEnd: namedArgs.containsKey('onChangeEnd') ? namedArgs['onChangeEnd'] : null,
+            onChangeStart: namedArgs.containsKey('onChangeStart')
+                ? namedArgs['onChangeStart']
+                : null,
+            onChangeEnd: namedArgs.containsKey('onChangeEnd')
+                ? namedArgs['onChangeEnd']
+                : null,
             min: namedArgs.containsKey('min') ? namedArgs['min'] : 0.0,
             max: namedArgs.containsKey('max') ? namedArgs['max'] : 1.0,
-            divisions: namedArgs.containsKey('divisions') ? namedArgs['divisions'] : null,
-            labels: namedArgs.containsKey('labels') ? namedArgs['labels'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            inactiveColor: namedArgs.containsKey('inactiveColor') ? namedArgs['inactiveColor'] : null,
+            divisions: namedArgs.containsKey('divisions')
+                ? namedArgs['divisions']
+                : null,
+            labels:
+                namedArgs.containsKey('labels') ? namedArgs['labels'] : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            inactiveColor: namedArgs.containsKey('inactiveColor')
+                ? namedArgs['inactiveColor']
+                : null,
             semanticFormatterCallback:
-                namedArgs.containsKey('semanticFormatterCallback') ? namedArgs['semanticFormatterCallback'] : null);
+                namedArgs.containsKey('semanticFormatterCallback')
+                    ? namedArgs['semanticFormatterCallback']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,8 +50,8 @@ class RangeSliderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SemanticFormatterCallback': (HTFunction function) =>
-          (value) => function.call(positionalArgs: [value], namedArgs: const {}) as String,
+      'SemanticFormatterCallback': (HTFunction function) => (value) =>
+          function.call(positionalArgs: [value], namedArgs: const {}) as String,
     };
   }
 }
@@ -47,7 +60,7 @@ extension RangeSliderBinding on RangeSlider {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RangeSlider');
+        return const HTType('RangeSlider');
       case 'values':
         return values;
       case 'onChanged':
@@ -77,29 +90,41 @@ extension RangeSliderBinding on RangeSlider {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/refresh_indicator.g.dart b/lib/bindings/flutter/material/refresh_indicator.g.dart
index e1714bc..3cf0f65 100644
--- a/lib/bindings/flutter/material/refresh_indicator.g.dart
+++ b/lib/bindings/flutter/material/refresh_indicator.g.dart
@@ -4,7 +4,8 @@ import 'dart:async';
 import 'package:flutter/widgets.dart';
 
 class RefreshIndicatorTriggerModeAutoBinding extends HTExternalClass {
-  RefreshIndicatorTriggerModeAutoBinding() : super('RefreshIndicatorTriggerMode');
+  RefreshIndicatorTriggerModeAutoBinding()
+      : super('RefreshIndicatorTriggerMode');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
@@ -16,7 +17,7 @@ class RefreshIndicatorTriggerModeAutoBinding extends HTExternalClass {
       case 'RefreshIndicatorTriggerMode.onEdge':
         return RefreshIndicatorTriggerMode.onEdge;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +25,14 @@ class RefreshIndicatorTriggerModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RefreshIndicatorTriggerMode');
+        return const HTType('RefreshIndicatorTriggerMode');
       case 'index':
         return (instance as RefreshIndicatorTriggerMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as RefreshIndicatorTriggerMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as RefreshIndicatorTriggerMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,20 +47,32 @@ class RefreshIndicatorAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RefreshIndicator(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            displacement: namedArgs.containsKey('displacement') ? namedArgs['displacement'] : 40.0,
+            displacement: namedArgs.containsKey('displacement')
+                ? namedArgs['displacement']
+                : 40.0,
             onRefresh: namedArgs['onRefresh'],
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            notificationPredicate: namedArgs.containsKey('notificationPredicate')
-                ? namedArgs['notificationPredicate']
-                : defaultScrollNotificationPredicate,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            semanticsValue: namedArgs.containsKey('semanticsValue') ? namedArgs['semanticsValue'] : null,
-            strokeWidth: namedArgs.containsKey('strokeWidth') ? namedArgs['strokeWidth'] : 2.0,
-            triggerMode:
-                namedArgs.containsKey('triggerMode') ? namedArgs['triggerMode'] : RefreshIndicatorTriggerMode.onEdge);
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            notificationPredicate:
+                namedArgs.containsKey('notificationPredicate')
+                    ? namedArgs['notificationPredicate']
+                    : defaultScrollNotificationPredicate,
+            semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                ? namedArgs['semanticsLabel']
+                : null,
+            semanticsValue: namedArgs.containsKey('semanticsValue')
+                ? namedArgs['semanticsValue']
+                : null,
+            strokeWidth: namedArgs.containsKey('strokeWidth')
+                ? namedArgs['strokeWidth']
+                : 2.0,
+            triggerMode: namedArgs.containsKey('triggerMode')
+                ? namedArgs['triggerMode']
+                : RefreshIndicatorTriggerMode.onEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -69,10 +83,11 @@ class RefreshIndicatorAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RefreshCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
-      'ScrollNotificationPredicate': (HTFunction function) =>
-          (notification) => function.call(positionalArgs: [notification], namedArgs: const {}) as bool,
+      'RefreshCallback': (HTFunction function) => () => function
+          .call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
+      'ScrollNotificationPredicate': (HTFunction function) => (notification) =>
+          function.call(positionalArgs: [notification], namedArgs: const {})
+              as bool,
     };
   }
 }
@@ -81,7 +96,7 @@ extension RefreshIndicatorBinding on RefreshIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RefreshIndicator');
+        return const HTType('RefreshIndicator');
       case 'child':
         return child;
       case 'displacement':
@@ -113,25 +128,37 @@ extension RefreshIndicatorBinding on RefreshIndicator {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -143,9 +170,10 @@ class RefreshIndicatorStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RefreshIndicatorState':
-        return ({positionalArgs, namedArgs, typeArgs}) => RefreshIndicatorState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RefreshIndicatorState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -156,8 +184,8 @@ class RefreshIndicatorStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -166,7 +194,7 @@ extension RefreshIndicatorStateBinding on RefreshIndicatorState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RefreshIndicatorState');
+        return const HTType('RefreshIndicatorState');
       case 'widget':
         return widget;
       case 'context':
@@ -176,31 +204,38 @@ extension RefreshIndicatorStateBinding on RefreshIndicatorState {
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'show':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            show(atTop: namedArgs.containsKey('atTop') ? namedArgs['atTop'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => show(
+            atTop: namedArgs.containsKey('atTop') ? namedArgs['atTop'] : true);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/reorderable_list.g.dart b/lib/bindings/flutter/material/reorderable_list.g.dart
index fea1e80..b379028 100644
--- a/lib/bindings/flutter/material/reorderable_list.g.dart
+++ b/lib/bindings/flutter/material/reorderable_list.g.dart
@@ -15,55 +15,108 @@ class ReorderableListViewAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ReorderableListView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onReorder: namedArgs['onReorder'],
-            proxyDecorator: namedArgs.containsKey('proxyDecorator') ? namedArgs['proxyDecorator'] : null,
+            proxyDecorator: namedArgs.containsKey('proxyDecorator')
+                ? namedArgs['proxyDecorator']
+                : null,
             buildDefaultDragHandles:
-                namedArgs.containsKey('buildDefaultDragHandles') ? namedArgs['buildDefaultDragHandles'] : true,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
+                namedArgs.containsKey('buildDefaultDragHandles')
+                    ? namedArgs['buildDefaultDragHandles']
+                    : true,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            header:
+                namedArgs.containsKey('header') ? namedArgs['header'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            scrollController: namedArgs.containsKey('scrollController')
+                ? namedArgs['scrollController']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
             anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
             children: List<Widget>.from(namedArgs['children']));
       case 'ReorderableListView.builder':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReorderableListView.builder(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            itemBuilder: namedArgs['itemBuilder'],
-            itemCount: namedArgs['itemCount'],
-            onReorder: namedArgs['onReorder'],
-            proxyDecorator: namedArgs.containsKey('proxyDecorator') ? namedArgs['proxyDecorator'] : null,
-            buildDefaultDragHandles:
-                namedArgs.containsKey('buildDefaultDragHandles') ? namedArgs['buildDefaultDragHandles'] : true,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReorderableListView.builder(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                itemBuilder: namedArgs['itemBuilder'],
+                itemCount: namedArgs['itemCount'],
+                onReorder: namedArgs['onReorder'],
+                proxyDecorator: namedArgs.containsKey('proxyDecorator')
+                    ? namedArgs['proxyDecorator']
+                    : null,
+                buildDefaultDragHandles:
+                    namedArgs.containsKey('buildDefaultDragHandles')
+                        ? namedArgs['buildDefaultDragHandles']
+                        : true,
+                padding: namedArgs.containsKey('padding')
+                    ? namedArgs['padding']
+                    : null,
+                header: namedArgs.containsKey('header')
+                    ? namedArgs['header']
+                    : null,
+                scrollDirection: namedArgs.containsKey('scrollDirection')
+                    ? namedArgs['scrollDirection']
+                    : Axis.vertical,
+                reverse: namedArgs.containsKey('reverse')
+                    ? namedArgs['reverse']
+                    : false,
+                scrollController: namedArgs.containsKey('scrollController')
+                    ? namedArgs['scrollController']
+                    : null,
+                primary: namedArgs.containsKey('primary')
+                    ? namedArgs['primary']
+                    : null,
+                physics: namedArgs.containsKey('physics')
+                    ? namedArgs['physics']
+                    : null,
+                shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                    ? namedArgs['shrinkWrap']
+                    : false,
+                anchor:
+                    namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
+                cacheExtent: namedArgs.containsKey('cacheExtent')
+                    ? namedArgs['cacheExtent']
+                    : null,
+                dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                    ? namedArgs['dragStartBehavior']
+                    : DragStartBehavior.start,
+                keyboardDismissBehavior:
+                    namedArgs.containsKey('keyboardDismissBehavior')
+                        ? namedArgs['keyboardDismissBehavior']
+                        : ScrollViewKeyboardDismissBehavior.manual,
+                restorationId: namedArgs.containsKey('restorationId')
+                    ? namedArgs['restorationId']
+                    : null,
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -74,12 +127,16 @@ class ReorderableListViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ReorderCallback': (HTFunction function) =>
-          (oldIndex, newIndex) => function.call(positionalArgs: [oldIndex, newIndex], namedArgs: const {}),
-      'ReorderItemProxyDecorator': (HTFunction function) => (child, index, animation) =>
-          function.call(positionalArgs: [child, index, animation], namedArgs: const {}) as Widget,
-      'IndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget,
+      'ReorderCallback': (HTFunction function) => (oldIndex, newIndex) =>
+          function
+              .call(positionalArgs: [oldIndex, newIndex], namedArgs: const {}),
+      'ReorderItemProxyDecorator': (HTFunction function) =>
+          (child, index, animation) => function.call(
+              positionalArgs: [child, index, animation],
+              namedArgs: const {}) as Widget,
+      'IndexedWidgetBuilder': (HTFunction function) => (context, index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget,
     };
   }
 }
@@ -88,7 +145,7 @@ extension ReorderableListViewBinding on ReorderableListView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReorderableListView');
+        return const HTType('ReorderableListView');
       case 'itemBuilder':
         return itemBuilder;
       case 'itemCount':
@@ -138,25 +195,37 @@ extension ReorderableListViewBinding on ReorderableListView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/scaffold.g.dart b/lib/bindings/flutter/material/scaffold.g.dart
index efaf3ec..e63266f 100644
--- a/lib/bindings/flutter/material/scaffold.g.dart
+++ b/lib/bindings/flutter/material/scaffold.g.dart
@@ -12,14 +12,17 @@ class ScaffoldMessengerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScaffoldMessenger':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ScaffoldMessenger(key: namedArgs.containsKey('key') ? namedArgs['key'] : null, child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) => ScaffoldMessenger(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            child: namedArgs['child']);
       case 'ScaffoldMessenger.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScaffoldMessenger.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScaffoldMessenger.of(positionalArgs[0]);
       case 'ScaffoldMessenger.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScaffoldMessenger.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScaffoldMessenger.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +36,7 @@ extension ScaffoldMessengerBinding on ScaffoldMessenger {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaffoldMessenger');
+        return const HTType('ScaffoldMessenger');
       case 'child':
         return child;
       case 'key':
@@ -47,25 +50,37 @@ extension ScaffoldMessengerBinding on ScaffoldMessenger {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -77,9 +92,10 @@ class ScaffoldMessengerStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScaffoldMessengerState':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScaffoldMessengerState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScaffoldMessengerState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -90,8 +106,8 @@ class ScaffoldMessengerStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -100,7 +116,7 @@ extension ScaffoldMessengerStateBinding on ScaffoldMessengerState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaffoldMessengerState');
+        return const HTType('ScaffoldMessengerState');
       case 'widget':
         return widget;
       case 'context':
@@ -108,34 +124,45 @@ extension ScaffoldMessengerStateBinding on ScaffoldMessengerState {
       case 'mounted':
         return mounted;
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'showSnackBar':
-        return ({positionalArgs, namedArgs, typeArgs}) => showSnackBar(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            showSnackBar(positionalArgs[0]);
       case 'removeCurrentSnackBar':
         return ({positionalArgs, namedArgs, typeArgs}) => removeCurrentSnackBar(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : SnackBarClosedReason.remove);
+            reason: namedArgs.containsKey('reason')
+                ? namedArgs['reason']
+                : SnackBarClosedReason.remove);
       case 'hideCurrentSnackBar':
         return ({positionalArgs, namedArgs, typeArgs}) => hideCurrentSnackBar(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : SnackBarClosedReason.hide);
+            reason: namedArgs.containsKey('reason')
+                ? namedArgs['reason']
+                : SnackBarClosedReason.hide);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -147,18 +174,19 @@ class ScaffoldPrelayoutGeometryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScaffoldPrelayoutGeometry':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScaffoldPrelayoutGeometry(
-            bottomSheetSize: namedArgs['bottomSheetSize'],
-            contentBottom: namedArgs['contentBottom'],
-            contentTop: namedArgs['contentTop'],
-            floatingActionButtonSize: namedArgs['floatingActionButtonSize'],
-            minInsets: namedArgs['minInsets'],
-            minViewPadding: namedArgs['minViewPadding'],
-            scaffoldSize: namedArgs['scaffoldSize'],
-            snackBarSize: namedArgs['snackBarSize'],
-            textDirection: namedArgs['textDirection']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScaffoldPrelayoutGeometry(
+                bottomSheetSize: namedArgs['bottomSheetSize'],
+                contentBottom: namedArgs['contentBottom'],
+                contentTop: namedArgs['contentTop'],
+                floatingActionButtonSize: namedArgs['floatingActionButtonSize'],
+                minInsets: namedArgs['minInsets'],
+                minViewPadding: namedArgs['minViewPadding'],
+                scaffoldSize: namedArgs['scaffoldSize'],
+                snackBarSize: namedArgs['snackBarSize'],
+                textDirection: namedArgs['textDirection']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -172,7 +200,7 @@ extension ScaffoldPrelayoutGeometryBinding on ScaffoldPrelayoutGeometry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaffoldPrelayoutGeometry');
+        return const HTType('ScaffoldPrelayoutGeometry');
       case 'floatingActionButtonSize':
         return floatingActionButtonSize;
       case 'bottomSheetSize':
@@ -192,7 +220,7 @@ extension ScaffoldPrelayoutGeometryBinding on ScaffoldPrelayoutGeometry {
       case 'textDirection':
         return textDirection;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -206,11 +234,15 @@ class ScaffoldGeometryAutoBinding extends HTExternalClass {
       case 'ScaffoldGeometry':
         return ({positionalArgs, namedArgs, typeArgs}) => ScaffoldGeometry(
             bottomNavigationBarTop:
-                namedArgs.containsKey('bottomNavigationBarTop') ? namedArgs['bottomNavigationBarTop'] : null,
+                namedArgs.containsKey('bottomNavigationBarTop')
+                    ? namedArgs['bottomNavigationBarTop']
+                    : null,
             floatingActionButtonArea:
-                namedArgs.containsKey('floatingActionButtonArea') ? namedArgs['floatingActionButtonArea'] : null);
+                namedArgs.containsKey('floatingActionButtonArea')
+                    ? namedArgs['floatingActionButtonArea']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -224,7 +256,7 @@ extension ScaffoldGeometryBinding on ScaffoldGeometry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaffoldGeometry');
+        return const HTType('ScaffoldGeometry');
       case 'bottomNavigationBarTop':
         return bottomNavigationBarTop;
       case 'floatingActionButtonArea':
@@ -232,11 +264,15 @@ extension ScaffoldGeometryBinding on ScaffoldGeometry {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             bottomNavigationBarTop:
-                namedArgs.containsKey('bottomNavigationBarTop') ? namedArgs['bottomNavigationBarTop'] : null,
+                namedArgs.containsKey('bottomNavigationBarTop')
+                    ? namedArgs['bottomNavigationBarTop']
+                    : null,
             floatingActionButtonArea:
-                namedArgs.containsKey('floatingActionButtonArea') ? namedArgs['floatingActionButtonArea'] : null);
+                namedArgs.containsKey('floatingActionButtonArea')
+                    ? namedArgs['floatingActionButtonArea']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -250,54 +286,72 @@ class ScaffoldAutoBinding extends HTExternalClass {
       case 'Scaffold':
         return ({positionalArgs, namedArgs, typeArgs}) => Scaffold(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            appBar: namedArgs.containsKey('appBar') ? namedArgs['appBar'] : null,
+            appBar:
+                namedArgs.containsKey('appBar') ? namedArgs['appBar'] : null,
             body: namedArgs.containsKey('body') ? namedArgs['body'] : null,
-            floatingActionButton:
-                namedArgs.containsKey('floatingActionButton') ? namedArgs['floatingActionButton'] : null,
-            floatingActionButtonLocation: namedArgs.containsKey('floatingActionButtonLocation')
-                ? namedArgs['floatingActionButtonLocation']
-                : null,
-            floatingActionButtonAnimator: namedArgs.containsKey('floatingActionButtonAnimator')
-                ? namedArgs['floatingActionButtonAnimator']
+            floatingActionButton: namedArgs.containsKey('floatingActionButton')
+                ? namedArgs['floatingActionButton']
                 : null,
+            floatingActionButtonLocation:
+                namedArgs.containsKey('floatingActionButtonLocation')
+                    ? namedArgs['floatingActionButtonLocation']
+                    : null,
+            floatingActionButtonAnimator:
+                namedArgs.containsKey('floatingActionButtonAnimator')
+                    ? namedArgs['floatingActionButtonAnimator']
+                    : null,
             persistentFooterButtons: namedArgs.containsKey('persistentFooterButtons')
                 ? List<Widget>.from(namedArgs['persistentFooterButtons'])
                 : null,
-            drawer: namedArgs.containsKey('drawer') ? namedArgs['drawer'] : null,
-            onDrawerChanged: namedArgs.containsKey('onDrawerChanged') ? namedArgs['onDrawerChanged'] : null,
-            endDrawer: namedArgs.containsKey('endDrawer') ? namedArgs['endDrawer'] : null,
-            onEndDrawerChanged: namedArgs.containsKey('onEndDrawerChanged') ? namedArgs['onEndDrawerChanged'] : null,
-            bottomNavigationBar: namedArgs.containsKey('bottomNavigationBar') ? namedArgs['bottomNavigationBar'] : null,
-            bottomSheet: namedArgs.containsKey('bottomSheet') ? namedArgs['bottomSheet'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            resizeToAvoidBottomInset:
-                namedArgs.containsKey('resizeToAvoidBottomInset') ? namedArgs['resizeToAvoidBottomInset'] : null,
+            drawer:
+                namedArgs.containsKey('drawer') ? namedArgs['drawer'] : null,
+            onDrawerChanged: namedArgs.containsKey('onDrawerChanged')
+                ? namedArgs['onDrawerChanged']
+                : null,
+            endDrawer: namedArgs.containsKey('endDrawer')
+                ? namedArgs['endDrawer']
+                : null,
+            onEndDrawerChanged: namedArgs.containsKey('onEndDrawerChanged')
+                ? namedArgs['onEndDrawerChanged']
+                : null,
+            bottomNavigationBar: namedArgs.containsKey('bottomNavigationBar')
+                ? namedArgs['bottomNavigationBar']
+                : null,
+            bottomSheet: namedArgs.containsKey('bottomSheet')
+                ? namedArgs['bottomSheet']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            resizeToAvoidBottomInset: namedArgs.containsKey('resizeToAvoidBottomInset')
+                ? namedArgs['resizeToAvoidBottomInset']
+                : null,
             primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : true,
-            drawerDragStartBehavior: namedArgs.containsKey('drawerDragStartBehavior')
-                ? namedArgs['drawerDragStartBehavior']
-                : DragStartBehavior.start,
+            drawerDragStartBehavior: namedArgs.containsKey('drawerDragStartBehavior') ? namedArgs['drawerDragStartBehavior'] : DragStartBehavior.start,
             extendBody: namedArgs.containsKey('extendBody') ? namedArgs['extendBody'] : false,
-            extendBodyBehindAppBar:
-                namedArgs.containsKey('extendBodyBehindAppBar') ? namedArgs['extendBodyBehindAppBar'] : false,
+            extendBodyBehindAppBar: namedArgs.containsKey('extendBodyBehindAppBar') ? namedArgs['extendBodyBehindAppBar'] : false,
             drawerScrimColor: namedArgs.containsKey('drawerScrimColor') ? namedArgs['drawerScrimColor'] : null,
             drawerEdgeDragWidth: namedArgs.containsKey('drawerEdgeDragWidth') ? namedArgs['drawerEdgeDragWidth'] : null,
-            drawerEnableOpenDragGesture:
-                namedArgs.containsKey('drawerEnableOpenDragGesture') ? namedArgs['drawerEnableOpenDragGesture'] : true,
-            endDrawerEnableOpenDragGesture: namedArgs.containsKey('endDrawerEnableOpenDragGesture')
-                ? namedArgs['endDrawerEnableOpenDragGesture']
-                : true,
+            drawerEnableOpenDragGesture: namedArgs.containsKey('drawerEnableOpenDragGesture') ? namedArgs['drawerEnableOpenDragGesture'] : true,
+            endDrawerEnableOpenDragGesture: namedArgs.containsKey('endDrawerEnableOpenDragGesture') ? namedArgs['endDrawerEnableOpenDragGesture'] : true,
             restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null);
       case 'Scaffold.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Scaffold.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Scaffold.of(positionalArgs[0]);
       case 'Scaffold.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => Scaffold.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Scaffold.maybeOf(positionalArgs[0]);
       case 'Scaffold.geometryOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => Scaffold.geometryOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Scaffold.geometryOf(positionalArgs[0]);
       case 'Scaffold.hasDrawer':
-        return ({positionalArgs, namedArgs, typeArgs}) => Scaffold.hasDrawer(positionalArgs[0],
-            registerForUpdates: namedArgs.containsKey('registerForUpdates') ? namedArgs['registerForUpdates'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => Scaffold.hasDrawer(
+            positionalArgs[0],
+            registerForUpdates: namedArgs.containsKey('registerForUpdates')
+                ? namedArgs['registerForUpdates']
+                : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -308,8 +362,8 @@ class ScaffoldAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DrawerCallback': (HTFunction function) =>
-          (isOpened) => function.call(positionalArgs: [isOpened], namedArgs: const {}),
+      'DrawerCallback': (HTFunction function) => (isOpened) =>
+          function.call(positionalArgs: [isOpened], namedArgs: const {}),
     };
   }
 }
@@ -318,7 +372,7 @@ extension ScaffoldBinding on Scaffold {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Scaffold');
+        return const HTType('Scaffold');
       case 'extendBody':
         return extendBody;
       case 'extendBodyBehindAppBar':
@@ -376,25 +430,37 @@ extension ScaffoldBinding on Scaffold {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -408,7 +474,7 @@ class ScaffoldStateAutoBinding extends HTExternalClass {
       case 'ScaffoldState':
         return ({positionalArgs, namedArgs, typeArgs}) => ScaffoldState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -419,10 +485,10 @@ class ScaffoldStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'WidgetBuilder': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as Widget,
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'WidgetBuilder': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as Widget,
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -431,7 +497,7 @@ extension ScaffoldStateBinding on ScaffoldState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaffoldState');
+        return const HTType('ScaffoldState');
       case 'restorationId':
         return restorationId;
       case 'hasAppBar':
@@ -459,49 +525,67 @@ extension ScaffoldStateBinding on ScaffoldState {
       case 'mounted':
         return mounted;
       case 'restoreState':
-        return ({positionalArgs, namedArgs, typeArgs}) => restoreState(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restoreState(positionalArgs[0], positionalArgs[1]);
       case 'openDrawer':
         return ({positionalArgs, namedArgs, typeArgs}) => openDrawer();
       case 'openEndDrawer':
         return ({positionalArgs, namedArgs, typeArgs}) => openEndDrawer();
       case 'showBottomSheet':
         return ({positionalArgs, namedArgs, typeArgs}) => showBottomSheet(
-            context: namedArgs.containsKey('context') ? namedArgs['context'] : null,
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            context:
+                namedArgs.containsKey('context') ? namedArgs['context'] : null,
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
-            transitionAnimationController: namedArgs.containsKey('transitionAnimationController')
-                ? namedArgs['transitionAnimationController']
-                : null);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
+            transitionAnimationController:
+                namedArgs.containsKey('transitionAnimationController')
+                    ? namedArgs['transitionAnimationController']
+                    : null);
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'showBodyScrim':
-        return ({positionalArgs, namedArgs, typeArgs}) => showBodyScrim(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            showBodyScrim(positionalArgs[0], positionalArgs[1]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/scrollbar.g.dart b/lib/bindings/flutter/material/scrollbar.g.dart
index c3a365e..c650860 100644
--- a/lib/bindings/flutter/material/scrollbar.g.dart
+++ b/lib/bindings/flutter/material/scrollbar.g.dart
@@ -13,16 +13,29 @@ class ScrollbarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Scrollbar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            isAlwaysShown: namedArgs.containsKey('isAlwaysShown') ? namedArgs['isAlwaysShown'] : null,
-            showTrackOnHover: namedArgs.containsKey('showTrackOnHover') ? namedArgs['showTrackOnHover'] : null,
-            hoverThickness: namedArgs.containsKey('hoverThickness') ? namedArgs['hoverThickness'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            isAlwaysShown: namedArgs.containsKey('isAlwaysShown')
+                ? namedArgs['isAlwaysShown']
+                : null,
+            showTrackOnHover: namedArgs.containsKey('showTrackOnHover')
+                ? namedArgs['showTrackOnHover']
+                : null,
+            hoverThickness: namedArgs.containsKey('hoverThickness')
+                ? namedArgs['hoverThickness']
+                : null,
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
             notificationPredicate:
-                namedArgs.containsKey('notificationPredicate') ? namedArgs['notificationPredicate'] : null);
+                namedArgs.containsKey('notificationPredicate')
+                    ? namedArgs['notificationPredicate']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,8 +46,9 @@ class ScrollbarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ScrollNotificationPredicate': (HTFunction function) =>
-          (notification) => function.call(positionalArgs: [notification], namedArgs: const {}) as bool,
+      'ScrollNotificationPredicate': (HTFunction function) => (notification) =>
+          function.call(positionalArgs: [notification], namedArgs: const {})
+              as bool,
     };
   }
 }
@@ -43,7 +57,7 @@ extension ScrollbarBinding on Scrollbar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Scrollbar');
+        return const HTType('Scrollbar');
       case 'child':
         return child;
       case 'controller':
@@ -71,25 +85,37 @@ extension ScrollbarBinding on Scrollbar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/scrollbar_theme.g.dart b/lib/bindings/flutter/material/scrollbar_theme.g.dart
index 4829906..f801a5e 100644
--- a/lib/bindings/flutter/material/scrollbar_theme.g.dart
+++ b/lib/bindings/flutter/material/scrollbar_theme.g.dart
@@ -11,21 +11,41 @@ class ScrollbarThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ScrollbarThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollbarThemeData(
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            showTrackOnHover: namedArgs.containsKey('showTrackOnHover') ? namedArgs['showTrackOnHover'] : null,
-            isAlwaysShown: namedArgs.containsKey('isAlwaysShown') ? namedArgs['isAlwaysShown'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : null,
-            trackBorderColor: namedArgs.containsKey('trackBorderColor') ? namedArgs['trackBorderColor'] : null,
-            crossAxisMargin: namedArgs.containsKey('crossAxisMargin') ? namedArgs['crossAxisMargin'] : null,
-            mainAxisMargin: namedArgs.containsKey('mainAxisMargin') ? namedArgs['mainAxisMargin'] : null,
-            minThumbLength: namedArgs.containsKey('minThumbLength') ? namedArgs['minThumbLength'] : null);
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            showTrackOnHover: namedArgs.containsKey('showTrackOnHover')
+                ? namedArgs['showTrackOnHover']
+                : null,
+            isAlwaysShown: namedArgs.containsKey('isAlwaysShown')
+                ? namedArgs['isAlwaysShown']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : null,
+            trackBorderColor: namedArgs.containsKey('trackBorderColor')
+                ? namedArgs['trackBorderColor']
+                : null,
+            crossAxisMargin: namedArgs.containsKey('crossAxisMargin')
+                ? namedArgs['crossAxisMargin']
+                : null,
+            mainAxisMargin: namedArgs.containsKey('mainAxisMargin')
+                ? namedArgs['mainAxisMargin']
+                : null,
+            minThumbLength: namedArgs.containsKey('minThumbLength')
+                ? namedArgs['minThumbLength']
+                : null);
       case 'ScrollbarThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ScrollbarThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ScrollbarThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -39,7 +59,7 @@ extension ScrollbarThemeDataBinding on ScrollbarThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollbarThemeData');
+        return const HTType('ScrollbarThemeData');
       case 'thickness':
         return thickness;
       case 'showTrackOnHover':
@@ -64,29 +84,51 @@ extension ScrollbarThemeDataBinding on ScrollbarThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            showTrackOnHover: namedArgs.containsKey('showTrackOnHover') ? namedArgs['showTrackOnHover'] : null,
-            isAlwaysShown: namedArgs.containsKey('isAlwaysShown') ? namedArgs['isAlwaysShown'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : null,
-            trackBorderColor: namedArgs.containsKey('trackBorderColor') ? namedArgs['trackBorderColor'] : null,
-            crossAxisMargin: namedArgs.containsKey('crossAxisMargin') ? namedArgs['crossAxisMargin'] : null,
-            mainAxisMargin: namedArgs.containsKey('mainAxisMargin') ? namedArgs['mainAxisMargin'] : null,
-            minThumbLength: namedArgs.containsKey('minThumbLength') ? namedArgs['minThumbLength'] : null);
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            showTrackOnHover: namedArgs.containsKey('showTrackOnHover')
+                ? namedArgs['showTrackOnHover']
+                : null,
+            isAlwaysShown: namedArgs.containsKey('isAlwaysShown')
+                ? namedArgs['isAlwaysShown']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : null,
+            trackBorderColor: namedArgs.containsKey('trackBorderColor')
+                ? namedArgs['trackBorderColor']
+                : null,
+            crossAxisMargin: namedArgs.containsKey('crossAxisMargin')
+                ? namedArgs['crossAxisMargin']
+                : null,
+            mainAxisMargin: namedArgs.containsKey('mainAxisMargin')
+                ? namedArgs['mainAxisMargin']
+                : null,
+            minThumbLength: namedArgs.containsKey('minThumbLength')
+                ? namedArgs['minThumbLength']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -103,9 +145,10 @@ class ScrollbarThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'ScrollbarTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScrollbarTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScrollbarTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -119,7 +162,7 @@ extension ScrollbarThemeBinding on ScrollbarTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollbarTheme');
+        return const HTType('ScrollbarTheme');
       case 'data':
         return data;
       case 'child':
@@ -129,31 +172,44 @@ extension ScrollbarThemeBinding on ScrollbarTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/selectable_text.g.dart b/lib/bindings/flutter/material/selectable_text.g.dart
index f21339f..7e6f61e 100644
--- a/lib/bindings/flutter/material/selectable_text.g.dart
+++ b/lib/bindings/flutter/material/selectable_text.g.dart
@@ -13,63 +13,147 @@ class SelectableTextAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SelectableText':
-        return ({positionalArgs, namedArgs, typeArgs}) => SelectableText(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => SelectableText(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : false,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : null,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
-            cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
-            cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : null,
-            cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : false,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions')
+                ? namedArgs['toolbarOptions']
+                : null,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            cursorWidth: namedArgs.containsKey('cursorWidth')
+                ? namedArgs['cursorWidth']
+                : 2.0,
+            cursorHeight: namedArgs.containsKey('cursorHeight')
+                ? namedArgs['cursorHeight']
+                : null,
+            cursorRadius: namedArgs.containsKey('cursorRadius')
+                ? namedArgs['cursorRadius']
+                : null,
+            cursorColor: namedArgs.containsKey('cursorColor')
+                ? namedArgs['cursorColor']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
-            selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
+                namedArgs.containsKey('enableInteractiveSelection')
+                    ? namedArgs['enableInteractiveSelection']
+                    : true,
+            selectionControls: namedArgs.containsKey('selectionControls')
+                ? namedArgs['selectionControls']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            scrollPhysics: namedArgs.containsKey('scrollPhysics') ? namedArgs['scrollPhysics'] : null,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            textWidthBasis: namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : null,
-            onSelectionChanged: namedArgs.containsKey('onSelectionChanged') ? namedArgs['onSelectionChanged'] : null);
+            scrollPhysics: namedArgs.containsKey('scrollPhysics')
+                ? namedArgs['scrollPhysics']
+                : null,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : null,
+            onSelectionChanged: namedArgs.containsKey('onSelectionChanged')
+                ? namedArgs['onSelectionChanged']
+                : null);
       case 'SelectableText.rich':
-        return ({positionalArgs, namedArgs, typeArgs}) => SelectableText.rich(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => SelectableText.rich(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : false,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : null,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
-            cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
-            cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : null,
-            cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : false,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions')
+                ? namedArgs['toolbarOptions']
+                : null,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            cursorWidth: namedArgs.containsKey('cursorWidth')
+                ? namedArgs['cursorWidth']
+                : 2.0,
+            cursorHeight: namedArgs.containsKey('cursorHeight')
+                ? namedArgs['cursorHeight']
+                : null,
+            cursorRadius: namedArgs.containsKey('cursorRadius')
+                ? namedArgs['cursorRadius']
+                : null,
+            cursorColor: namedArgs.containsKey('cursorColor')
+                ? namedArgs['cursorColor']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
-            selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
+                namedArgs.containsKey('enableInteractiveSelection')
+                    ? namedArgs['enableInteractiveSelection']
+                    : true,
+            selectionControls: namedArgs.containsKey('selectionControls')
+                ? namedArgs['selectionControls']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            scrollPhysics: namedArgs.containsKey('scrollPhysics') ? namedArgs['scrollPhysics'] : null,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            textWidthBasis: namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : null,
-            onSelectionChanged: namedArgs.containsKey('onSelectionChanged') ? namedArgs['onSelectionChanged'] : null);
+            scrollPhysics: namedArgs.containsKey('scrollPhysics')
+                ? namedArgs['scrollPhysics']
+                : null,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : null,
+            onSelectionChanged: namedArgs.containsKey('onSelectionChanged')
+                ? namedArgs['onSelectionChanged']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,9 +164,11 @@ class SelectableTextAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'SelectionChangedCallback': (HTFunction function) =>
-          (selection, cause) => function.call(positionalArgs: [selection, cause], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'SelectionChangedCallback': (HTFunction function) => (selection, cause) =>
+          function
+              .call(positionalArgs: [selection, cause], namedArgs: const {}),
     };
   }
 }
@@ -91,7 +177,7 @@ extension SelectableTextBinding on SelectableText {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SelectableText');
+        return const HTType('SelectableText');
       case 'data':
         return data;
       case 'textSpan':
@@ -151,29 +237,41 @@ extension SelectableTextBinding on SelectableText {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/slider.g.dart b/lib/bindings/flutter/material/slider.g.dart
index d777317..51fd127 100644
--- a/lib/bindings/flutter/material/slider.g.dart
+++ b/lib/bindings/flutter/material/slider.g.dart
@@ -16,39 +16,75 @@ class SliderAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            onChangeStart: namedArgs.containsKey('onChangeStart') ? namedArgs['onChangeStart'] : null,
-            onChangeEnd: namedArgs.containsKey('onChangeEnd') ? namedArgs['onChangeEnd'] : null,
+            onChangeStart: namedArgs.containsKey('onChangeStart')
+                ? namedArgs['onChangeStart']
+                : null,
+            onChangeEnd: namedArgs.containsKey('onChangeEnd')
+                ? namedArgs['onChangeEnd']
+                : null,
             min: namedArgs.containsKey('min') ? namedArgs['min'] : 0.0,
             max: namedArgs.containsKey('max') ? namedArgs['max'] : 1.0,
-            divisions: namedArgs.containsKey('divisions') ? namedArgs['divisions'] : null,
+            divisions: namedArgs.containsKey('divisions')
+                ? namedArgs['divisions']
+                : null,
             label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            inactiveColor: namedArgs.containsKey('inactiveColor') ? namedArgs['inactiveColor'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            inactiveColor: namedArgs.containsKey('inactiveColor')
+                ? namedArgs['inactiveColor']
+                : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
             semanticFormatterCallback:
-                namedArgs.containsKey('semanticFormatterCallback') ? namedArgs['semanticFormatterCallback'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
+                namedArgs.containsKey('semanticFormatterCallback')
+                    ? namedArgs['semanticFormatterCallback']
+                    : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false);
       case 'Slider.adaptive':
         return ({positionalArgs, namedArgs, typeArgs}) => Slider.adaptive(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            onChangeStart: namedArgs.containsKey('onChangeStart') ? namedArgs['onChangeStart'] : null,
-            onChangeEnd: namedArgs.containsKey('onChangeEnd') ? namedArgs['onChangeEnd'] : null,
+            onChangeStart: namedArgs.containsKey('onChangeStart')
+                ? namedArgs['onChangeStart']
+                : null,
+            onChangeEnd: namedArgs.containsKey('onChangeEnd')
+                ? namedArgs['onChangeEnd']
+                : null,
             min: namedArgs.containsKey('min') ? namedArgs['min'] : 0.0,
             max: namedArgs.containsKey('max') ? namedArgs['max'] : 1.0,
-            divisions: namedArgs.containsKey('divisions') ? namedArgs['divisions'] : null,
+            divisions: namedArgs.containsKey('divisions')
+                ? namedArgs['divisions']
+                : null,
             label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            inactiveColor: namedArgs.containsKey('inactiveColor') ? namedArgs['inactiveColor'] : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            inactiveColor: namedArgs.containsKey('inactiveColor')
+                ? namedArgs['inactiveColor']
+                : null,
             semanticFormatterCallback:
-                namedArgs.containsKey('semanticFormatterCallback') ? namedArgs['semanticFormatterCallback'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
+                namedArgs.containsKey('semanticFormatterCallback')
+                    ? namedArgs['semanticFormatterCallback']
+                    : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -59,8 +95,8 @@ class SliderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SemanticFormatterCallback': (HTFunction function) =>
-          (value) => function.call(positionalArgs: [value], namedArgs: const {}) as String,
+      'SemanticFormatterCallback': (HTFunction function) => (value) =>
+          function.call(positionalArgs: [value], namedArgs: const {}) as String,
     };
   }
 }
@@ -69,7 +105,7 @@ extension SliderBinding on Slider {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Slider');
+        return const HTType('Slider');
       case 'value':
         return value;
       case 'onChanged':
@@ -105,29 +141,41 @@ extension SliderBinding on Slider {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/slider_theme.g.dart b/lib/bindings/flutter/material/slider_theme.g.dart
index 2c575ba..6d384cd 100644
--- a/lib/bindings/flutter/material/slider_theme.g.dart
+++ b/lib/bindings/flutter/material/slider_theme.g.dart
@@ -22,7 +22,7 @@ class ShowValueIndicatorAutoBinding extends HTExternalClass {
       case 'ShowValueIndicator.never':
         return ShowValueIndicator.never;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,13 +30,14 @@ class ShowValueIndicatorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShowValueIndicator');
+        return const HTType('ShowValueIndicator');
       case 'index':
         return (instance as ShowValueIndicator).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ShowValueIndicator).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ShowValueIndicator).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,7 +55,7 @@ class ThumbAutoBinding extends HTExternalClass {
       case 'Thumb.end':
         return Thumb.end;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,13 +63,14 @@ class ThumbAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Thumb');
+        return const HTType('Thumb');
       case 'index':
         return (instance as Thumb).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as Thumb).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as Thumb).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -85,9 +87,10 @@ class SliderThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'SliderTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliderTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliderTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -101,7 +104,7 @@ extension SliderThemeBinding on SliderTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliderTheme');
+        return const HTType('SliderTheme');
       case 'data':
         return data;
       case 'child':
@@ -111,33 +114,47 @@ extension SliderThemeBinding on SliderTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -150,25 +167,43 @@ class SliderThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SliderThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => SliderThemeData(
-            trackHeight: namedArgs.containsKey('trackHeight') ? namedArgs['trackHeight'] : null,
-            activeTrackColor: namedArgs.containsKey('activeTrackColor') ? namedArgs['activeTrackColor'] : null,
-            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor') ? namedArgs['inactiveTrackColor'] : null,
-            disabledActiveTrackColor:
-                namedArgs.containsKey('disabledActiveTrackColor') ? namedArgs['disabledActiveTrackColor'] : null,
-            disabledInactiveTrackColor:
-                namedArgs.containsKey('disabledInactiveTrackColor') ? namedArgs['disabledInactiveTrackColor'] : null,
-            activeTickMarkColor: namedArgs.containsKey('activeTickMarkColor') ? namedArgs['activeTickMarkColor'] : null,
-            inactiveTickMarkColor:
-                namedArgs.containsKey('inactiveTickMarkColor') ? namedArgs['inactiveTickMarkColor'] : null,
-            disabledActiveTickMarkColor:
-                namedArgs.containsKey('disabledActiveTickMarkColor') ? namedArgs['disabledActiveTickMarkColor'] : null,
-            disabledInactiveTickMarkColor: namedArgs.containsKey('disabledInactiveTickMarkColor')
-                ? namedArgs['disabledInactiveTickMarkColor']
-                : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            overlappingShapeStrokeColor:
-                namedArgs.containsKey('overlappingShapeStrokeColor') ? namedArgs['overlappingShapeStrokeColor'] : null,
-            disabledThumbColor: namedArgs.containsKey('disabledThumbColor') ? namedArgs['disabledThumbColor'] : null,
+            trackHeight: namedArgs.containsKey('trackHeight')
+                ? namedArgs['trackHeight']
+                : null,
+            activeTrackColor: namedArgs.containsKey('activeTrackColor')
+                ? namedArgs['activeTrackColor']
+                : null,
+            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor')
+                ? namedArgs['inactiveTrackColor']
+                : null,
+            disabledActiveTrackColor: namedArgs.containsKey('disabledActiveTrackColor')
+                ? namedArgs['disabledActiveTrackColor']
+                : null,
+            disabledInactiveTrackColor: namedArgs.containsKey('disabledInactiveTrackColor')
+                ? namedArgs['disabledInactiveTrackColor']
+                : null,
+            activeTickMarkColor: namedArgs.containsKey('activeTickMarkColor')
+                ? namedArgs['activeTickMarkColor']
+                : null,
+            inactiveTickMarkColor: namedArgs.containsKey('inactiveTickMarkColor')
+                ? namedArgs['inactiveTickMarkColor']
+                : null,
+            disabledActiveTickMarkColor: namedArgs.containsKey('disabledActiveTickMarkColor')
+                ? namedArgs['disabledActiveTickMarkColor']
+                : null,
+            disabledInactiveTickMarkColor:
+                namedArgs.containsKey('disabledInactiveTickMarkColor')
+                    ? namedArgs['disabledInactiveTickMarkColor']
+                    : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            overlappingShapeStrokeColor: namedArgs.containsKey('overlappingShapeStrokeColor')
+                ? namedArgs['overlappingShapeStrokeColor']
+                : null,
+            disabledThumbColor: namedArgs.containsKey('disabledThumbColor')
+                ? namedArgs['disabledThumbColor']
+                : null,
             overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
             valueIndicatorColor: namedArgs.containsKey('valueIndicatorColor') ? namedArgs['valueIndicatorColor'] : null,
             overlayShape: namedArgs.containsKey('overlayShape') ? namedArgs['overlayShape'] : null,
@@ -179,24 +214,23 @@ class SliderThemeDataAutoBinding extends HTExternalClass {
             rangeTickMarkShape: namedArgs.containsKey('rangeTickMarkShape') ? namedArgs['rangeTickMarkShape'] : null,
             rangeThumbShape: namedArgs.containsKey('rangeThumbShape') ? namedArgs['rangeThumbShape'] : null,
             rangeTrackShape: namedArgs.containsKey('rangeTrackShape') ? namedArgs['rangeTrackShape'] : null,
-            rangeValueIndicatorShape:
-                namedArgs.containsKey('rangeValueIndicatorShape') ? namedArgs['rangeValueIndicatorShape'] : null,
+            rangeValueIndicatorShape: namedArgs.containsKey('rangeValueIndicatorShape') ? namedArgs['rangeValueIndicatorShape'] : null,
             showValueIndicator: namedArgs.containsKey('showValueIndicator') ? namedArgs['showValueIndicator'] : null,
-            valueIndicatorTextStyle:
-                namedArgs.containsKey('valueIndicatorTextStyle') ? namedArgs['valueIndicatorTextStyle'] : null,
+            valueIndicatorTextStyle: namedArgs.containsKey('valueIndicatorTextStyle') ? namedArgs['valueIndicatorTextStyle'] : null,
             minThumbSeparation: namedArgs.containsKey('minThumbSeparation') ? namedArgs['minThumbSeparation'] : null,
             thumbSelector: namedArgs.containsKey('thumbSelector') ? namedArgs['thumbSelector'] : null);
       case 'SliderThemeData.fromPrimaryColors':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliderThemeData.fromPrimaryColors(
-            primaryColor: namedArgs['primaryColor'],
-            primaryColorDark: namedArgs['primaryColorDark'],
-            primaryColorLight: namedArgs['primaryColorLight'],
-            valueIndicatorTextStyle: namedArgs['valueIndicatorTextStyle']);
-      case 'SliderThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            SliderThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            SliderThemeData.fromPrimaryColors(
+                primaryColor: namedArgs['primaryColor'],
+                primaryColorDark: namedArgs['primaryColorDark'],
+                primaryColorLight: namedArgs['primaryColorLight'],
+                valueIndicatorTextStyle: namedArgs['valueIndicatorTextStyle']);
+      case 'SliderThemeData.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => SliderThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -207,10 +241,16 @@ class SliderThemeDataAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RangeThumbSelector': (HTFunction function) => (textDirection, values, tapValue, thumbSize, trackSize, dx) =>
-          function.call(
-              positionalArgs: [textDirection, values, tapValue, thumbSize, trackSize, dx],
-              namedArgs: const {}) as Thumb?,
+      'RangeThumbSelector': (HTFunction function) =>
+          (textDirection, values, tapValue, thumbSize, trackSize, dx) =>
+              function.call(positionalArgs: [
+                textDirection,
+                values,
+                tapValue,
+                thumbSize,
+                trackSize,
+                dx
+              ], namedArgs: const {}) as Thumb?,
     };
   }
 }
@@ -219,7 +259,7 @@ extension SliderThemeDataBinding on SliderThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliderThemeData');
+        return const HTType('SliderThemeData');
       case 'trackHeight':
         return trackHeight;
       case 'activeTrackColor':
@@ -278,25 +318,43 @@ extension SliderThemeDataBinding on SliderThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            trackHeight: namedArgs.containsKey('trackHeight') ? namedArgs['trackHeight'] : null,
-            activeTrackColor: namedArgs.containsKey('activeTrackColor') ? namedArgs['activeTrackColor'] : null,
-            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor') ? namedArgs['inactiveTrackColor'] : null,
-            disabledActiveTrackColor:
-                namedArgs.containsKey('disabledActiveTrackColor') ? namedArgs['disabledActiveTrackColor'] : null,
-            disabledInactiveTrackColor:
-                namedArgs.containsKey('disabledInactiveTrackColor') ? namedArgs['disabledInactiveTrackColor'] : null,
-            activeTickMarkColor: namedArgs.containsKey('activeTickMarkColor') ? namedArgs['activeTickMarkColor'] : null,
-            inactiveTickMarkColor:
-                namedArgs.containsKey('inactiveTickMarkColor') ? namedArgs['inactiveTickMarkColor'] : null,
-            disabledActiveTickMarkColor:
-                namedArgs.containsKey('disabledActiveTickMarkColor') ? namedArgs['disabledActiveTickMarkColor'] : null,
-            disabledInactiveTickMarkColor: namedArgs.containsKey('disabledInactiveTickMarkColor')
-                ? namedArgs['disabledInactiveTickMarkColor']
-                : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            overlappingShapeStrokeColor:
-                namedArgs.containsKey('overlappingShapeStrokeColor') ? namedArgs['overlappingShapeStrokeColor'] : null,
-            disabledThumbColor: namedArgs.containsKey('disabledThumbColor') ? namedArgs['disabledThumbColor'] : null,
+            trackHeight: namedArgs.containsKey('trackHeight')
+                ? namedArgs['trackHeight']
+                : null,
+            activeTrackColor: namedArgs.containsKey('activeTrackColor')
+                ? namedArgs['activeTrackColor']
+                : null,
+            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor')
+                ? namedArgs['inactiveTrackColor']
+                : null,
+            disabledActiveTrackColor: namedArgs.containsKey('disabledActiveTrackColor')
+                ? namedArgs['disabledActiveTrackColor']
+                : null,
+            disabledInactiveTrackColor: namedArgs.containsKey('disabledInactiveTrackColor')
+                ? namedArgs['disabledInactiveTrackColor']
+                : null,
+            activeTickMarkColor: namedArgs.containsKey('activeTickMarkColor')
+                ? namedArgs['activeTickMarkColor']
+                : null,
+            inactiveTickMarkColor: namedArgs.containsKey('inactiveTickMarkColor')
+                ? namedArgs['inactiveTickMarkColor']
+                : null,
+            disabledActiveTickMarkColor: namedArgs.containsKey('disabledActiveTickMarkColor')
+                ? namedArgs['disabledActiveTickMarkColor']
+                : null,
+            disabledInactiveTickMarkColor:
+                namedArgs.containsKey('disabledInactiveTickMarkColor')
+                    ? namedArgs['disabledInactiveTickMarkColor']
+                    : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            overlappingShapeStrokeColor: namedArgs.containsKey('overlappingShapeStrokeColor')
+                ? namedArgs['overlappingShapeStrokeColor']
+                : null,
+            disabledThumbColor: namedArgs.containsKey('disabledThumbColor')
+                ? namedArgs['disabledThumbColor']
+                : null,
             overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
             valueIndicatorColor: namedArgs.containsKey('valueIndicatorColor') ? namedArgs['valueIndicatorColor'] : null,
             overlayShape: namedArgs.containsKey('overlayShape') ? namedArgs['overlayShape'] : null,
@@ -307,42 +365,47 @@ extension SliderThemeDataBinding on SliderThemeData {
             rangeTickMarkShape: namedArgs.containsKey('rangeTickMarkShape') ? namedArgs['rangeTickMarkShape'] : null,
             rangeThumbShape: namedArgs.containsKey('rangeThumbShape') ? namedArgs['rangeThumbShape'] : null,
             rangeTrackShape: namedArgs.containsKey('rangeTrackShape') ? namedArgs['rangeTrackShape'] : null,
-            rangeValueIndicatorShape:
-                namedArgs.containsKey('rangeValueIndicatorShape') ? namedArgs['rangeValueIndicatorShape'] : null,
+            rangeValueIndicatorShape: namedArgs.containsKey('rangeValueIndicatorShape') ? namedArgs['rangeValueIndicatorShape'] : null,
             showValueIndicator: namedArgs.containsKey('showValueIndicator') ? namedArgs['showValueIndicator'] : null,
-            valueIndicatorTextStyle:
-                namedArgs.containsKey('valueIndicatorTextStyle') ? namedArgs['valueIndicatorTextStyle'] : null,
+            valueIndicatorTextStyle: namedArgs.containsKey('valueIndicatorTextStyle') ? namedArgs['valueIndicatorTextStyle'] : null,
             minThumbSeparation: namedArgs.containsKey('minThumbSeparation') ? namedArgs['minThumbSeparation'] : null,
             thumbSelector: namedArgs.containsKey('thumbSelector') ? namedArgs['thumbSelector'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RectangularSliderTrackShapeAutoBinding extends HTExternalClass {
-  RectangularSliderTrackShapeAutoBinding() : super('RectangularSliderTrackShape');
+  RectangularSliderTrackShapeAutoBinding()
+      : super('RectangularSliderTrackShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RectangularSliderTrackShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RectangularSliderTrackShape(
-            disabledThumbGapWidth:
-                namedArgs.containsKey('disabledThumbGapWidth') ? namedArgs['disabledThumbGapWidth'] : 2.0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RectangularSliderTrackShape(
+                disabledThumbGapWidth:
+                    namedArgs.containsKey('disabledThumbGapWidth')
+                        ? namedArgs['disabledThumbGapWidth']
+                        : 2.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -356,39 +419,66 @@ extension RectangularSliderTrackShapeBinding on RectangularSliderTrackShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RectangularSliderTrackShape');
+        return const HTType('RectangularSliderTrackShape');
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            thumbCenter: namedArgs.containsKey('thumbCenter') ? namedArgs['thumbCenter'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : false,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            thumbCenter: namedArgs.containsKey('thumbCenter')
+                ? namedArgs['thumbCenter']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : false,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false);
       case 'getPreferredRect':
         return ({positionalArgs, namedArgs, typeArgs}) => getPreferredRect(
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null);
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RoundedRectSliderTrackShapeAutoBinding extends HTExternalClass {
-  RoundedRectSliderTrackShapeAutoBinding() : super('RoundedRectSliderTrackShape');
+  RoundedRectSliderTrackShapeAutoBinding()
+      : super('RoundedRectSliderTrackShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RoundedRectSliderTrackShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RoundedRectSliderTrackShape();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RoundedRectSliderTrackShape();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -402,41 +492,70 @@ extension RoundedRectSliderTrackShapeBinding on RoundedRectSliderTrackShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundedRectSliderTrackShape');
+        return const HTType('RoundedRectSliderTrackShape');
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            thumbCenter: namedArgs.containsKey('thumbCenter') ? namedArgs['thumbCenter'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : false,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            thumbCenter: namedArgs.containsKey('thumbCenter')
+                ? namedArgs['thumbCenter']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : false,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false,
             additionalActiveTrackHeight:
-                namedArgs.containsKey('additionalActiveTrackHeight') ? namedArgs['additionalActiveTrackHeight'] : 2);
+                namedArgs.containsKey('additionalActiveTrackHeight')
+                    ? namedArgs['additionalActiveTrackHeight']
+                    : 2);
       case 'getPreferredRect':
         return ({positionalArgs, namedArgs, typeArgs}) => getPreferredRect(
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null);
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RectangularRangeSliderTrackShapeAutoBinding extends HTExternalClass {
-  RectangularRangeSliderTrackShapeAutoBinding() : super('RectangularRangeSliderTrackShape');
+  RectangularRangeSliderTrackShapeAutoBinding()
+      : super('RectangularRangeSliderTrackShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RectangularRangeSliderTrackShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RectangularRangeSliderTrackShape();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RectangularRangeSliderTrackShape();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -446,44 +565,74 @@ class RectangularRangeSliderTrackShapeAutoBinding extends HTExternalClass {
   }
 }
 
-extension RectangularRangeSliderTrackShapeBinding on RectangularRangeSliderTrackShape {
+extension RectangularRangeSliderTrackShapeBinding
+    on RectangularRangeSliderTrackShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RectangularRangeSliderTrackShape');
+        return const HTType('RectangularRangeSliderTrackShape');
       case 'getPreferredRect':
         return ({positionalArgs, namedArgs, typeArgs}) => getPreferredRect(
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : false);
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : false);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            startThumbCenter: namedArgs.containsKey('startThumbCenter') ? namedArgs['startThumbCenter'] : null,
-            endThumbCenter: namedArgs.containsKey('endThumbCenter') ? namedArgs['endThumbCenter'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : false,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            startThumbCenter: namedArgs.containsKey('startThumbCenter')
+                ? namedArgs['startThumbCenter']
+                : null,
+            endThumbCenter: namedArgs.containsKey('endThumbCenter')
+                ? namedArgs['endThumbCenter']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : false,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RoundedRectRangeSliderTrackShapeAutoBinding extends HTExternalClass {
-  RoundedRectRangeSliderTrackShapeAutoBinding() : super('RoundedRectRangeSliderTrackShape');
+  RoundedRectRangeSliderTrackShapeAutoBinding()
+      : super('RoundedRectRangeSliderTrackShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RoundedRectRangeSliderTrackShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RoundedRectRangeSliderTrackShape();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RoundedRectRangeSliderTrackShape();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -493,32 +642,62 @@ class RoundedRectRangeSliderTrackShapeAutoBinding extends HTExternalClass {
   }
 }
 
-extension RoundedRectRangeSliderTrackShapeBinding on RoundedRectRangeSliderTrackShape {
+extension RoundedRectRangeSliderTrackShapeBinding
+    on RoundedRectRangeSliderTrackShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundedRectRangeSliderTrackShape');
+        return const HTType('RoundedRectRangeSliderTrackShape');
       case 'getPreferredRect':
         return ({positionalArgs, namedArgs, typeArgs}) => getPreferredRect(
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : false);
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : false);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            startThumbCenter: namedArgs.containsKey('startThumbCenter') ? namedArgs['startThumbCenter'] : null,
-            endThumbCenter: namedArgs.containsKey('endThumbCenter') ? namedArgs['endThumbCenter'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : false,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            startThumbCenter: namedArgs.containsKey('startThumbCenter')
+                ? namedArgs['startThumbCenter']
+                : null,
+            endThumbCenter: namedArgs.containsKey('endThumbCenter')
+                ? namedArgs['endThumbCenter']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : false,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             additionalActiveTrackHeight:
-                namedArgs.containsKey('additionalActiveTrackHeight') ? namedArgs['additionalActiveTrackHeight'] : 2);
+                namedArgs.containsKey('additionalActiveTrackHeight')
+                    ? namedArgs['additionalActiveTrackHeight']
+                    : 2);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -530,10 +709,13 @@ class RoundSliderTickMarkShapeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RoundSliderTickMarkShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RoundSliderTickMarkShape(
-            tickMarkRadius: namedArgs.containsKey('tickMarkRadius') ? namedArgs['tickMarkRadius'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RoundSliderTickMarkShape(
+                tickMarkRadius: namedArgs.containsKey('tickMarkRadius')
+                    ? namedArgs['tickMarkRadius']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -547,38 +729,59 @@ extension RoundSliderTickMarkShapeBinding on RoundSliderTickMarkShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundSliderTickMarkShape');
+        return const HTType('RoundSliderTickMarkShape');
       case 'tickMarkRadius':
         return tickMarkRadius;
       case 'getPreferredSize':
         return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : null);
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            thumbCenter: namedArgs.containsKey('thumbCenter') ? namedArgs['thumbCenter'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            thumbCenter: namedArgs.containsKey('thumbCenter')
+                ? namedArgs['thumbCenter']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RoundRangeSliderTickMarkShapeAutoBinding extends HTExternalClass {
-  RoundRangeSliderTickMarkShapeAutoBinding() : super('RoundRangeSliderTickMarkShape');
+  RoundRangeSliderTickMarkShapeAutoBinding()
+      : super('RoundRangeSliderTickMarkShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RoundRangeSliderTickMarkShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RoundRangeSliderTickMarkShape(
-            tickMarkRadius: namedArgs.containsKey('tickMarkRadius') ? namedArgs['tickMarkRadius'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RoundRangeSliderTickMarkShape(
+                tickMarkRadius: namedArgs.containsKey('tickMarkRadius')
+                    ? namedArgs['tickMarkRadius']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -588,28 +791,48 @@ class RoundRangeSliderTickMarkShapeAutoBinding extends HTExternalClass {
   }
 }
 
-extension RoundRangeSliderTickMarkShapeBinding on RoundRangeSliderTickMarkShape {
+extension RoundRangeSliderTickMarkShapeBinding
+    on RoundRangeSliderTickMarkShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundRangeSliderTickMarkShape');
+        return const HTType('RoundRangeSliderTickMarkShape');
       case 'tickMarkRadius':
         return tickMarkRadius;
       case 'getPreferredSize':
         return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false);
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            startThumbCenter: namedArgs.containsKey('startThumbCenter') ? namedArgs['startThumbCenter'] : null,
-            endThumbCenter: namedArgs.containsKey('endThumbCenter') ? namedArgs['endThumbCenter'] : null,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            startThumbCenter: namedArgs.containsKey('startThumbCenter')
+                ? namedArgs['startThumbCenter']
+                : null,
+            endThumbCenter: namedArgs.containsKey('endThumbCenter')
+                ? namedArgs['endThumbCenter']
+                : null,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -622,12 +845,20 @@ class RoundSliderThumbShapeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RoundSliderThumbShape':
         return ({positionalArgs, namedArgs, typeArgs}) => RoundSliderThumbShape(
-            enabledThumbRadius: namedArgs.containsKey('enabledThumbRadius') ? namedArgs['enabledThumbRadius'] : 10.0,
-            disabledThumbRadius: namedArgs.containsKey('disabledThumbRadius') ? namedArgs['disabledThumbRadius'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 1.0,
-            pressedElevation: namedArgs.containsKey('pressedElevation') ? namedArgs['pressedElevation'] : 6.0);
+            enabledThumbRadius: namedArgs.containsKey('enabledThumbRadius')
+                ? namedArgs['enabledThumbRadius']
+                : 10.0,
+            disabledThumbRadius: namedArgs.containsKey('disabledThumbRadius')
+                ? namedArgs['disabledThumbRadius']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 1.0,
+            pressedElevation: namedArgs.containsKey('pressedElevation')
+                ? namedArgs['pressedElevation']
+                : 6.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -641,7 +872,7 @@ extension RoundSliderThumbShapeBinding on RoundSliderThumbShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundSliderThumbShape');
+        return const HTType('RoundSliderThumbShape');
       case 'enabledThumbRadius':
         return enabledThumbRadius;
       case 'disabledThumbRadius':
@@ -651,21 +882,41 @@ extension RoundSliderThumbShapeBinding on RoundSliderThumbShape {
       case 'pressedElevation':
         return pressedElevation;
       case 'getPreferredSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPreferredSize(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null);
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -677,13 +928,23 @@ class RoundRangeSliderThumbShapeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RoundRangeSliderThumbShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RoundRangeSliderThumbShape(
-            enabledThumbRadius: namedArgs.containsKey('enabledThumbRadius') ? namedArgs['enabledThumbRadius'] : 10.0,
-            disabledThumbRadius: namedArgs.containsKey('disabledThumbRadius') ? namedArgs['disabledThumbRadius'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 1.0,
-            pressedElevation: namedArgs.containsKey('pressedElevation') ? namedArgs['pressedElevation'] : 6.0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RoundRangeSliderThumbShape(
+                enabledThumbRadius: namedArgs.containsKey('enabledThumbRadius')
+                    ? namedArgs['enabledThumbRadius']
+                    : 10.0,
+                disabledThumbRadius:
+                    namedArgs.containsKey('disabledThumbRadius')
+                        ? namedArgs['disabledThumbRadius']
+                        : null,
+                elevation: namedArgs.containsKey('elevation')
+                    ? namedArgs['elevation']
+                    : 1.0,
+                pressedElevation: namedArgs.containsKey('pressedElevation')
+                    ? namedArgs['pressedElevation']
+                    : 6.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -697,7 +958,7 @@ extension RoundRangeSliderThumbShapeBinding on RoundRangeSliderThumbShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundRangeSliderThumbShape');
+        return const HTType('RoundRangeSliderThumbShape');
       case 'enabledThumbRadius':
         return enabledThumbRadius;
       case 'disabledThumbRadius':
@@ -707,20 +968,37 @@ extension RoundRangeSliderThumbShapeBinding on RoundRangeSliderThumbShape {
       case 'pressedElevation':
         return pressedElevation;
       case 'getPreferredSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPreferredSize(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : false,
-            isEnabled: namedArgs.containsKey('isEnabled') ? namedArgs['isEnabled'] : false,
-            isOnTop: namedArgs.containsKey('isOnTop') ? namedArgs['isOnTop'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : false,
+            isEnabled: namedArgs.containsKey('isEnabled')
+                ? namedArgs['isEnabled']
+                : false,
+            isOnTop:
+                namedArgs.containsKey('isOnTop') ? namedArgs['isOnTop'] : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             thumb: namedArgs.containsKey('thumb') ? namedArgs['thumb'] : null,
-            isPressed: namedArgs.containsKey('isPressed') ? namedArgs['isPressed'] : null);
+            isPressed: namedArgs.containsKey('isPressed')
+                ? namedArgs['isPressed']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -732,10 +1010,13 @@ class RoundSliderOverlayShapeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RoundSliderOverlayShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RoundSliderOverlayShape(
-            overlayRadius: namedArgs.containsKey('overlayRadius') ? namedArgs['overlayRadius'] : 24.0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RoundSliderOverlayShape(
+                overlayRadius: namedArgs.containsKey('overlayRadius')
+                    ? namedArgs['overlayRadius']
+                    : 24.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -749,39 +1030,61 @@ extension RoundSliderOverlayShapeBinding on RoundSliderOverlayShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundSliderOverlayShape');
+        return const HTType('RoundSliderOverlayShape');
       case 'overlayRadius':
         return overlayRadius;
       case 'getPreferredSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPreferredSize(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null);
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RectangularSliderValueIndicatorShapeAutoBinding extends HTExternalClass {
-  RectangularSliderValueIndicatorShapeAutoBinding() : super('RectangularSliderValueIndicatorShape');
+  RectangularSliderValueIndicatorShapeAutoBinding()
+      : super('RectangularSliderValueIndicatorShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RectangularSliderValueIndicatorShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RectangularSliderValueIndicatorShape();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RectangularSliderValueIndicatorShape();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -791,43 +1094,71 @@ class RectangularSliderValueIndicatorShapeAutoBinding extends HTExternalClass {
   }
 }
 
-extension RectangularSliderValueIndicatorShapeBinding on RectangularSliderValueIndicatorShape {
+extension RectangularSliderValueIndicatorShapeBinding
+    on RectangularSliderValueIndicatorShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RectangularSliderValueIndicatorShape');
+        return const HTType('RectangularSliderValueIndicatorShape');
       case 'getPreferredSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(positionalArgs[0], positionalArgs[1],
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(
+            positionalArgs[0], positionalArgs[1],
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null);
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
-class RectangularRangeSliderValueIndicatorShapeAutoBinding extends HTExternalClass {
-  RectangularRangeSliderValueIndicatorShapeAutoBinding() : super('RectangularRangeSliderValueIndicatorShape');
+class RectangularRangeSliderValueIndicatorShapeAutoBinding
+    extends HTExternalClass {
+  RectangularRangeSliderValueIndicatorShapeAutoBinding()
+      : super('RectangularRangeSliderValueIndicatorShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RectangularRangeSliderValueIndicatorShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => RectangularRangeSliderValueIndicatorShape();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RectangularRangeSliderValueIndicatorShape();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -837,53 +1168,92 @@ class RectangularRangeSliderValueIndicatorShapeAutoBinding extends HTExternalCla
   }
 }
 
-extension RectangularRangeSliderValueIndicatorShapeBinding on RectangularRangeSliderValueIndicatorShape {
+extension RectangularRangeSliderValueIndicatorShapeBinding
+    on RectangularRangeSliderValueIndicatorShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RectangularRangeSliderValueIndicatorShape');
+        return const HTType('RectangularRangeSliderValueIndicatorShape');
       case 'getPreferredSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(positionalArgs[0], positionalArgs[1],
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(
+            positionalArgs[0], positionalArgs[1],
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null);
       case 'getHorizontalShift':
         return ({positionalArgs, namedArgs, typeArgs}) => getHorizontalShift(
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : null,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null);
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            center:
+                namedArgs.containsKey('center') ? namedArgs['center'] : null,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null,
-            isOnTop: namedArgs.containsKey('isOnTop') ? namedArgs['isOnTop'] : null,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null,
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null,
+            isOnTop:
+                namedArgs.containsKey('isOnTop') ? namedArgs['isOnTop'] : null,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null,
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
             thumb: namedArgs.containsKey('thumb') ? namedArgs['thumb'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class PaddleSliderValueIndicatorShapeAutoBinding extends HTExternalClass {
-  PaddleSliderValueIndicatorShapeAutoBinding() : super('PaddleSliderValueIndicatorShape');
+  PaddleSliderValueIndicatorShapeAutoBinding()
+      : super('PaddleSliderValueIndicatorShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PaddleSliderValueIndicatorShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => PaddleSliderValueIndicatorShape();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PaddleSliderValueIndicatorShape();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -893,43 +1263,70 @@ class PaddleSliderValueIndicatorShapeAutoBinding extends HTExternalClass {
   }
 }
 
-extension PaddleSliderValueIndicatorShapeBinding on PaddleSliderValueIndicatorShape {
+extension PaddleSliderValueIndicatorShapeBinding
+    on PaddleSliderValueIndicatorShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PaddleSliderValueIndicatorShape');
+        return const HTType('PaddleSliderValueIndicatorShape');
       case 'getPreferredSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(positionalArgs[0], positionalArgs[1],
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(
+            positionalArgs[0], positionalArgs[1],
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null);
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class PaddleRangeSliderValueIndicatorShapeAutoBinding extends HTExternalClass {
-  PaddleRangeSliderValueIndicatorShapeAutoBinding() : super('PaddleRangeSliderValueIndicatorShape');
+  PaddleRangeSliderValueIndicatorShapeAutoBinding()
+      : super('PaddleRangeSliderValueIndicatorShape');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PaddleRangeSliderValueIndicatorShape':
-        return ({positionalArgs, namedArgs, typeArgs}) => PaddleRangeSliderValueIndicatorShape();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PaddleRangeSliderValueIndicatorShape();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -939,39 +1336,76 @@ class PaddleRangeSliderValueIndicatorShapeAutoBinding extends HTExternalClass {
   }
 }
 
-extension PaddleRangeSliderValueIndicatorShapeBinding on PaddleRangeSliderValueIndicatorShape {
+extension PaddleRangeSliderValueIndicatorShapeBinding
+    on PaddleRangeSliderValueIndicatorShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PaddleRangeSliderValueIndicatorShape');
+        return const HTType('PaddleRangeSliderValueIndicatorShape');
       case 'getPreferredSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(positionalArgs[0], positionalArgs[1],
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getPreferredSize(
+            positionalArgs[0], positionalArgs[1],
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null);
       case 'getHorizontalShift':
         return ({positionalArgs, namedArgs, typeArgs}) => getHorizontalShift(
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : null,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null);
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            center:
+                namedArgs.containsKey('center') ? namedArgs['center'] : null,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            activationAnimation: namedArgs.containsKey('activationAnimation') ? namedArgs['activationAnimation'] : null,
-            enableAnimation: namedArgs.containsKey('enableAnimation') ? namedArgs['enableAnimation'] : null,
-            isDiscrete: namedArgs.containsKey('isDiscrete') ? namedArgs['isDiscrete'] : null,
-            isOnTop: namedArgs.containsKey('isOnTop') ? namedArgs['isOnTop'] : false,
-            labelPainter: namedArgs.containsKey('labelPainter') ? namedArgs['labelPainter'] : null,
-            parentBox: namedArgs.containsKey('parentBox') ? namedArgs['parentBox'] : null,
-            sliderTheme: namedArgs.containsKey('sliderTheme') ? namedArgs['sliderTheme'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            activationAnimation: namedArgs.containsKey('activationAnimation')
+                ? namedArgs['activationAnimation']
+                : null,
+            enableAnimation: namedArgs.containsKey('enableAnimation')
+                ? namedArgs['enableAnimation']
+                : null,
+            isDiscrete: namedArgs.containsKey('isDiscrete')
+                ? namedArgs['isDiscrete']
+                : null,
+            isOnTop:
+                namedArgs.containsKey('isOnTop') ? namedArgs['isOnTop'] : false,
+            labelPainter: namedArgs.containsKey('labelPainter')
+                ? namedArgs['labelPainter']
+                : null,
+            parentBox: namedArgs.containsKey('parentBox')
+                ? namedArgs['parentBox']
+                : null,
+            sliderTheme: namedArgs.containsKey('sliderTheme')
+                ? namedArgs['sliderTheme']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             thumb: namedArgs.containsKey('thumb') ? namedArgs['thumb'] : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow') ? namedArgs['sizeWithOverflow'] : null);
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            sizeWithOverflow: namedArgs.containsKey('sizeWithOverflow')
+                ? namedArgs['sizeWithOverflow']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -983,9 +1417,10 @@ class RangeValuesAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RangeValues':
-        return ({positionalArgs, namedArgs, typeArgs}) => RangeValues(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RangeValues(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -999,7 +1434,7 @@ extension RangeValuesBinding on RangeValues {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RangeValues');
+        return const HTType('RangeValues');
       case 'start':
         return start;
       case 'end':
@@ -1009,7 +1444,7 @@ extension RangeValuesBinding on RangeValues {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1021,9 +1456,10 @@ class RangeLabelsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RangeLabels':
-        return ({positionalArgs, namedArgs, typeArgs}) => RangeLabels(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RangeLabels(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1037,7 +1473,7 @@ extension RangeLabelsBinding on RangeLabels {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RangeLabels');
+        return const HTType('RangeLabels');
       case 'start':
         return start;
       case 'end':
@@ -1047,7 +1483,7 @@ extension RangeLabelsBinding on RangeLabels {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/snack_bar.g.dart b/lib/bindings/flutter/material/snack_bar.g.dart
index a6ed3ca..c0c4b0a 100644
--- a/lib/bindings/flutter/material/snack_bar.g.dart
+++ b/lib/bindings/flutter/material/snack_bar.g.dart
@@ -26,7 +26,7 @@ class SnackBarClosedReasonAutoBinding extends HTExternalClass {
       case 'SnackBarClosedReason.timeout':
         return SnackBarClosedReason.timeout;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,13 +34,14 @@ class SnackBarClosedReasonAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SnackBarClosedReason');
+        return const HTType('SnackBarClosedReason');
       case 'index':
         return (instance as SnackBarClosedReason).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SnackBarClosedReason).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SnackBarClosedReason).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,12 +55,16 @@ class SnackBarActionAutoBinding extends HTExternalClass {
       case 'SnackBarAction':
         return ({positionalArgs, namedArgs, typeArgs}) => SnackBarAction(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            textColor: namedArgs.containsKey('textColor') ? namedArgs['textColor'] : null,
-            disabledTextColor: namedArgs.containsKey('disabledTextColor') ? namedArgs['disabledTextColor'] : null,
+            textColor: namedArgs.containsKey('textColor')
+                ? namedArgs['textColor']
+                : null,
+            disabledTextColor: namedArgs.containsKey('disabledTextColor')
+                ? namedArgs['disabledTextColor']
+                : null,
             label: namedArgs['label'],
             onPressed: namedArgs['onPressed']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -70,7 +75,8 @@ class SnackBarActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -79,7 +85,7 @@ extension SnackBarActionBinding on SnackBarAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SnackBarAction');
+        return const HTType('SnackBarAction');
       case 'textColor':
         return textColor;
       case 'disabledTextColor':
@@ -99,25 +105,37 @@ extension SnackBarActionBinding on SnackBarAction {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -132,22 +150,39 @@ class SnackBarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SnackBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             content: namedArgs['content'],
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : null,
-            action: namedArgs.containsKey('action') ? namedArgs['action'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : _snackBarDisplayDuration,
-            animation: namedArgs.containsKey('animation') ? namedArgs['animation'] : null,
-            onVisible: namedArgs.containsKey('onVisible') ? namedArgs['onVisible'] : null);
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : null,
+            action:
+                namedArgs.containsKey('action') ? namedArgs['action'] : null,
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : _snackBarDisplayDuration,
+            animation: namedArgs.containsKey('animation')
+                ? namedArgs['animation']
+                : null,
+            onVisible: namedArgs.containsKey('onVisible')
+                ? namedArgs['onVisible']
+                : null);
       case 'SnackBar.createAnimationController':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            SnackBar.createAnimationController(vsync: namedArgs.containsKey('vsync') ? namedArgs['vsync'] : null);
+            SnackBar.createAnimationController(
+                vsync:
+                    namedArgs.containsKey('vsync') ? namedArgs['vsync'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -158,7 +193,8 @@ class SnackBarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -167,7 +203,7 @@ extension SnackBarBinding on SnackBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SnackBar');
+        return const HTType('SnackBar');
       case 'content':
         return content;
       case 'backgroundColor':
@@ -197,8 +233,11 @@ extension SnackBarBinding on SnackBar {
       case 'hashCode':
         return hashCode;
       case 'withAnimation':
-        return ({positionalArgs, namedArgs, typeArgs}) => withAnimation(positionalArgs[0],
-            fallbackKey: namedArgs.containsKey('fallbackKey') ? namedArgs['fallbackKey'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => withAnimation(
+            positionalArgs[0],
+            fallbackKey: namedArgs.containsKey('fallbackKey')
+                ? namedArgs['fallbackKey']
+                : null);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'createElement':
@@ -206,25 +245,37 @@ extension SnackBarBinding on SnackBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/snack_bar_theme.g.dart b/lib/bindings/flutter/material/snack_bar_theme.g.dart
index d35099f..78c397d 100644
--- a/lib/bindings/flutter/material/snack_bar_theme.g.dart
+++ b/lib/bindings/flutter/material/snack_bar_theme.g.dart
@@ -16,7 +16,7 @@ class SnackBarBehaviorAutoBinding extends HTExternalClass {
       case 'SnackBarBehavior.floating':
         return SnackBarBehavior.floating;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class SnackBarBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SnackBarBehavior');
+        return const HTType('SnackBarBehavior');
       case 'index':
         return (instance as SnackBarBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SnackBarBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SnackBarBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -43,19 +44,32 @@ class SnackBarThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SnackBarThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => SnackBarThemeData(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            actionTextColor: namedArgs.containsKey('actionTextColor') ? namedArgs['actionTextColor'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            actionTextColor: namedArgs.containsKey('actionTextColor')
+                ? namedArgs['actionTextColor']
+                : null,
             disabledActionTextColor:
-                namedArgs.containsKey('disabledActionTextColor') ? namedArgs['disabledActionTextColor'] : null,
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+                namedArgs.containsKey('disabledActionTextColor')
+                    ? namedArgs['disabledActionTextColor']
+                    : null,
+            contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                ? namedArgs['contentTextStyle']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : null);
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : null);
       case 'SnackBarThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            SnackBarThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            SnackBarThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -69,7 +83,7 @@ extension SnackBarThemeDataBinding on SnackBarThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SnackBarThemeData');
+        return const HTType('SnackBarThemeData');
       case 'backgroundColor':
         return backgroundColor;
       case 'actionTextColor':
@@ -88,27 +102,42 @@ extension SnackBarThemeDataBinding on SnackBarThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            actionTextColor: namedArgs.containsKey('actionTextColor') ? namedArgs['actionTextColor'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            actionTextColor: namedArgs.containsKey('actionTextColor')
+                ? namedArgs['actionTextColor']
+                : null,
             disabledActionTextColor:
-                namedArgs.containsKey('disabledActionTextColor') ? namedArgs['disabledActionTextColor'] : null,
-            contentTextStyle: namedArgs.containsKey('contentTextStyle') ? namedArgs['contentTextStyle'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+                namedArgs.containsKey('disabledActionTextColor')
+                    ? namedArgs['disabledActionTextColor']
+                    : null,
+            contentTextStyle: namedArgs.containsKey('contentTextStyle')
+                ? namedArgs['contentTextStyle']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : null);
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/stepper.g.dart b/lib/bindings/flutter/material/stepper.g.dart
index 6e100e0..de5423a 100644
--- a/lib/bindings/flutter/material/stepper.g.dart
+++ b/lib/bindings/flutter/material/stepper.g.dart
@@ -21,7 +21,7 @@ class StepStateAutoBinding extends HTExternalClass {
       case 'StepState.error':
         return StepState.error;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,13 +29,14 @@ class StepStateAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StepState');
+        return const HTType('StepState');
       case 'index':
         return (instance as StepState).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as StepState).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as StepState).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -53,7 +54,7 @@ class StepperTypeAutoBinding extends HTExternalClass {
       case 'StepperType.horizontal':
         return StepperType.horizontal;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -61,13 +62,14 @@ class StepperTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StepperType');
+        return const HTType('StepperType');
       case 'index':
         return (instance as StepperType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as StepperType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as StepperType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -81,12 +83,18 @@ class StepAutoBinding extends HTExternalClass {
       case 'Step':
         return ({positionalArgs, namedArgs, typeArgs}) => Step(
             title: namedArgs['title'],
-            subtitle: namedArgs.containsKey('subtitle') ? namedArgs['subtitle'] : null,
+            subtitle: namedArgs.containsKey('subtitle')
+                ? namedArgs['subtitle']
+                : null,
             content: namedArgs['content'],
-            state: namedArgs.containsKey('state') ? namedArgs['state'] : StepState.indexed,
-            isActive: namedArgs.containsKey('isActive') ? namedArgs['isActive'] : false);
+            state: namedArgs.containsKey('state')
+                ? namedArgs['state']
+                : StepState.indexed,
+            isActive: namedArgs.containsKey('isActive')
+                ? namedArgs['isActive']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -100,7 +108,7 @@ extension StepBinding on Step {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Step');
+        return const HTType('Step');
       case 'title':
         return title;
       case 'subtitle':
@@ -112,7 +120,7 @@ extension StepBinding on Step {
       case 'isActive':
         return isActive;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -127,15 +135,28 @@ class StepperAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Stepper(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             steps: List<Step>.from(namedArgs['steps']),
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            type: namedArgs.containsKey('type') ? namedArgs['type'] : StepperType.vertical,
-            currentStep: namedArgs.containsKey('currentStep') ? namedArgs['currentStep'] : 0,
-            onStepTapped: namedArgs.containsKey('onStepTapped') ? namedArgs['onStepTapped'] : null,
-            onStepContinue: namedArgs.containsKey('onStepContinue') ? namedArgs['onStepContinue'] : null,
-            onStepCancel: namedArgs.containsKey('onStepCancel') ? namedArgs['onStepCancel'] : null,
-            controlsBuilder: namedArgs.containsKey('controlsBuilder') ? namedArgs['controlsBuilder'] : null);
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            type: namedArgs.containsKey('type')
+                ? namedArgs['type']
+                : StepperType.vertical,
+            currentStep: namedArgs.containsKey('currentStep')
+                ? namedArgs['currentStep']
+                : 0,
+            onStepTapped: namedArgs.containsKey('onStepTapped')
+                ? namedArgs['onStepTapped']
+                : null,
+            onStepContinue: namedArgs.containsKey('onStepContinue')
+                ? namedArgs['onStepContinue']
+                : null,
+            onStepCancel: namedArgs.containsKey('onStepCancel')
+                ? namedArgs['onStepCancel']
+                : null,
+            controlsBuilder: namedArgs.containsKey('controlsBuilder')
+                ? namedArgs['controlsBuilder']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -146,10 +167,16 @@ class StepperAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'ControlsWidgetBuilder': (HTFunction function) => (context, {onStepContinue, onStepCancel}) => function.call(
-          positionalArgs: [context],
-          namedArgs: {'onStepContinue': onStepContinue, 'onStepCancel': onStepCancel}) as Widget,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'ControlsWidgetBuilder': (HTFunction function) => (context,
+              {onStepContinue, onStepCancel}) =>
+          function.call(positionalArgs: [
+            context
+          ], namedArgs: {
+            'onStepContinue': onStepContinue,
+            'onStepCancel': onStepCancel
+          }) as Widget,
     };
   }
 }
@@ -158,7 +185,7 @@ extension StepperBinding on Stepper {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Stepper');
+        return const HTType('Stepper');
       case 'steps':
         return steps;
       case 'physics':
@@ -186,25 +213,37 @@ extension StepperBinding on Stepper {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/switch.g.dart b/lib/bindings/flutter/material/switch.g.dart
index 467e880..6e23368 100644
--- a/lib/bindings/flutter/material/switch.g.dart
+++ b/lib/bindings/flutter/material/switch.g.dart
@@ -17,27 +17,58 @@ class SwitchAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            activeTrackColor: namedArgs.containsKey('activeTrackColor') ? namedArgs['activeTrackColor'] : null,
-            inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor') ? namedArgs['inactiveThumbColor'] : null,
-            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor') ? namedArgs['inactiveTrackColor'] : null,
-            activeThumbImage: namedArgs.containsKey('activeThumbImage') ? namedArgs['activeThumbImage'] : null,
-            onActiveThumbImageError:
-                namedArgs.containsKey('onActiveThumbImageError') ? namedArgs['onActiveThumbImageError'] : null,
-            inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage') ? namedArgs['inactiveThumbImage'] : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            activeTrackColor: namedArgs.containsKey('activeTrackColor')
+                ? namedArgs['activeTrackColor']
+                : null,
+            inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor')
+                ? namedArgs['inactiveThumbColor']
+                : null,
+            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor')
+                ? namedArgs['inactiveTrackColor']
+                : null,
+            activeThumbImage: namedArgs.containsKey('activeThumbImage')
+                ? namedArgs['activeThumbImage']
+                : null,
+            onActiveThumbImageError: namedArgs.containsKey('onActiveThumbImageError')
+                ? namedArgs['onActiveThumbImageError']
+                : null,
+            inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage')
+                ? namedArgs['inactiveThumbImage']
+                : null,
             onInactiveThumbImageError:
-                namedArgs.containsKey('onInactiveThumbImageError') ? namedArgs['onInactiveThumbImageError'] : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : null,
-            materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
+                namedArgs.containsKey('onInactiveThumbImageError')
+                    ? namedArgs['onInactiveThumbImageError']
+                    : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : null,
+            materialTapTargetSize: namedArgs.containsKey('materialTapTargetSize')
+                ? namedArgs['materialTapTargetSize']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null,
             focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
             autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
       case 'Switch.adaptive':
@@ -45,31 +76,56 @@ class SwitchAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            activeTrackColor: namedArgs.containsKey('activeTrackColor') ? namedArgs['activeTrackColor'] : null,
-            inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor') ? namedArgs['inactiveThumbColor'] : null,
-            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor') ? namedArgs['inactiveTrackColor'] : null,
-            activeThumbImage: namedArgs.containsKey('activeThumbImage') ? namedArgs['activeThumbImage'] : null,
-            onActiveThumbImageError:
-                namedArgs.containsKey('onActiveThumbImageError') ? namedArgs['onActiveThumbImageError'] : null,
-            inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage') ? namedArgs['inactiveThumbImage'] : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            activeTrackColor: namedArgs.containsKey('activeTrackColor')
+                ? namedArgs['activeTrackColor']
+                : null,
+            inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor')
+                ? namedArgs['inactiveThumbColor']
+                : null,
+            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor')
+                ? namedArgs['inactiveTrackColor']
+                : null,
+            activeThumbImage: namedArgs.containsKey('activeThumbImage')
+                ? namedArgs['activeThumbImage']
+                : null,
+            onActiveThumbImageError: namedArgs.containsKey('onActiveThumbImageError')
+                ? namedArgs['onActiveThumbImageError']
+                : null,
+            inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage')
+                ? namedArgs['inactiveThumbImage']
+                : null,
             onInactiveThumbImageError:
-                namedArgs.containsKey('onInactiveThumbImageError') ? namedArgs['onInactiveThumbImageError'] : null,
-            materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
+                namedArgs.containsKey('onInactiveThumbImageError')
+                    ? namedArgs['onInactiveThumbImageError']
+                    : null,
+            materialTapTargetSize: namedArgs.containsKey('materialTapTargetSize')
+                ? namedArgs['materialTapTargetSize']
+                : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
             hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
             overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
             splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null,
             focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
             autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,8 +136,9 @@ class SwitchAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -90,7 +147,7 @@ extension SwitchBinding on Switch {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Switch');
+        return const HTType('Switch');
       case 'value':
         return value;
       case 'onChanged':
@@ -140,29 +197,41 @@ extension SwitchBinding on Switch {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/switch_list_tile.g.dart b/lib/bindings/flutter/material/switch_list_tile.g.dart
index 45d25df..edd6e11 100644
--- a/lib/bindings/flutter/material/switch_list_tile.g.dart
+++ b/lib/bindings/flutter/material/switch_list_tile.g.dart
@@ -13,53 +13,113 @@ class SwitchListTileAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             value: namedArgs['value'],
             onChanged: namedArgs['onChanged'],
-            tileColor: namedArgs.containsKey('tileColor') ? namedArgs['tileColor'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            activeTrackColor: namedArgs.containsKey('activeTrackColor') ? namedArgs['activeTrackColor'] : null,
-            inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor') ? namedArgs['inactiveThumbColor'] : null,
-            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor') ? namedArgs['inactiveTrackColor'] : null,
-            activeThumbImage: namedArgs.containsKey('activeThumbImage') ? namedArgs['activeThumbImage'] : null,
-            inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage') ? namedArgs['inactiveThumbImage'] : null,
+            tileColor: namedArgs.containsKey('tileColor')
+                ? namedArgs['tileColor']
+                : null,
+            activeColor: namedArgs.containsKey('activeColor')
+                ? namedArgs['activeColor']
+                : null,
+            activeTrackColor: namedArgs.containsKey('activeTrackColor')
+                ? namedArgs['activeTrackColor']
+                : null,
+            inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor')
+                ? namedArgs['inactiveThumbColor']
+                : null,
+            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor')
+                ? namedArgs['inactiveTrackColor']
+                : null,
+            activeThumbImage: namedArgs.containsKey('activeThumbImage')
+                ? namedArgs['activeThumbImage']
+                : null,
+            inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage')
+                ? namedArgs['inactiveThumbImage']
+                : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            subtitle: namedArgs.containsKey('subtitle') ? namedArgs['subtitle'] : null,
-            isThreeLine: namedArgs.containsKey('isThreeLine') ? namedArgs['isThreeLine'] : false,
+            subtitle: namedArgs.containsKey('subtitle')
+                ? namedArgs['subtitle']
+                : null,
+            isThreeLine: namedArgs.containsKey('isThreeLine')
+                ? namedArgs['isThreeLine']
+                : false,
             dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
+            contentPadding: namedArgs.containsKey('contentPadding')
+                ? namedArgs['contentPadding']
+                : null,
+            secondary: namedArgs.containsKey('secondary')
+                ? namedArgs['secondary']
+                : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : false,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
             controlAffinity: namedArgs.containsKey('controlAffinity')
                 ? namedArgs['controlAffinity']
                 : ListTileControlAffinity.platform,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            selectedTileColor: namedArgs.containsKey('selectedTileColor') ? namedArgs['selectedTileColor'] : null);
+            selectedTileColor: namedArgs.containsKey('selectedTileColor')
+                ? namedArgs['selectedTileColor']
+                : null);
       case 'SwitchListTile.adaptive':
-        return ({positionalArgs, namedArgs, typeArgs}) => SwitchListTile.adaptive(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            value: namedArgs['value'],
-            onChanged: namedArgs['onChanged'],
-            tileColor: namedArgs.containsKey('tileColor') ? namedArgs['tileColor'] : null,
-            activeColor: namedArgs.containsKey('activeColor') ? namedArgs['activeColor'] : null,
-            activeTrackColor: namedArgs.containsKey('activeTrackColor') ? namedArgs['activeTrackColor'] : null,
-            inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor') ? namedArgs['inactiveThumbColor'] : null,
-            inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor') ? namedArgs['inactiveTrackColor'] : null,
-            activeThumbImage: namedArgs.containsKey('activeThumbImage') ? namedArgs['activeThumbImage'] : null,
-            inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage') ? namedArgs['inactiveThumbImage'] : null,
-            title: namedArgs.containsKey('title') ? namedArgs['title'] : null,
-            subtitle: namedArgs.containsKey('subtitle') ? namedArgs['subtitle'] : null,
-            isThreeLine: namedArgs.containsKey('isThreeLine') ? namedArgs['isThreeLine'] : false,
-            dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
-            contentPadding: namedArgs.containsKey('contentPadding') ? namedArgs['contentPadding'] : null,
-            secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : false,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            controlAffinity: namedArgs.containsKey('controlAffinity')
-                ? namedArgs['controlAffinity']
-                : ListTileControlAffinity.platform,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            selectedTileColor: namedArgs.containsKey('selectedTileColor') ? namedArgs['selectedTileColor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SwitchListTile.adaptive(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                value: namedArgs['value'],
+                onChanged: namedArgs['onChanged'],
+                tileColor: namedArgs.containsKey('tileColor')
+                    ? namedArgs['tileColor']
+                    : null,
+                activeColor: namedArgs.containsKey('activeColor')
+                    ? namedArgs['activeColor']
+                    : null,
+                activeTrackColor: namedArgs.containsKey('activeTrackColor')
+                    ? namedArgs['activeTrackColor']
+                    : null,
+                inactiveThumbColor: namedArgs.containsKey('inactiveThumbColor')
+                    ? namedArgs['inactiveThumbColor']
+                    : null,
+                inactiveTrackColor: namedArgs.containsKey('inactiveTrackColor')
+                    ? namedArgs['inactiveTrackColor']
+                    : null,
+                activeThumbImage: namedArgs.containsKey('activeThumbImage')
+                    ? namedArgs['activeThumbImage']
+                    : null,
+                inactiveThumbImage: namedArgs.containsKey('inactiveThumbImage')
+                    ? namedArgs['inactiveThumbImage']
+                    : null,
+                title:
+                    namedArgs.containsKey('title') ? namedArgs['title'] : null,
+                subtitle: namedArgs.containsKey('subtitle')
+                    ? namedArgs['subtitle']
+                    : null,
+                isThreeLine: namedArgs.containsKey('isThreeLine')
+                    ? namedArgs['isThreeLine']
+                    : false,
+                dense:
+                    namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
+                contentPadding: namedArgs.containsKey('contentPadding')
+                    ? namedArgs['contentPadding']
+                    : null,
+                secondary: namedArgs.containsKey('secondary')
+                    ? namedArgs['secondary']
+                    : null,
+                selected: namedArgs.containsKey('selected')
+                    ? namedArgs['selected']
+                    : false,
+                autofocus: namedArgs.containsKey('autofocus')
+                    ? namedArgs['autofocus']
+                    : false,
+                controlAffinity: namedArgs.containsKey('controlAffinity')
+                    ? namedArgs['controlAffinity']
+                    : ListTileControlAffinity.platform,
+                shape:
+                    namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
+                selectedTileColor: namedArgs.containsKey('selectedTileColor')
+                    ? namedArgs['selectedTileColor']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -73,7 +133,7 @@ extension SwitchListTileBinding on SwitchListTile {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SwitchListTile');
+        return const HTType('SwitchListTile');
       case 'value':
         return value;
       case 'onChanged':
@@ -119,31 +179,44 @@ extension SwitchListTileBinding on SwitchListTile {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/switch_theme.g.dart b/lib/bindings/flutter/material/switch_theme.g.dart
index 1f468d5..0679a3e 100644
--- a/lib/bindings/flutter/material/switch_theme.g.dart
+++ b/lib/bindings/flutter/material/switch_theme.g.dart
@@ -12,18 +12,30 @@ class SwitchThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SwitchThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => SwitchThemeData(
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null);
       case 'SwitchThemeData.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            SwitchThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => SwitchThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,7 +49,7 @@ extension SwitchThemeDataBinding on SwitchThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SwitchThemeData');
+        return const HTType('SwitchThemeData');
       case 'thumbColor':
         return thumbColor;
       case 'trackColor':
@@ -54,26 +66,41 @@ extension SwitchThemeDataBinding on SwitchThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : null,
             materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            splashRadius: namedArgs.containsKey('splashRadius') ? namedArgs['splashRadius'] : null);
+                namedArgs.containsKey('materialTapTargetSize')
+                    ? namedArgs['materialTapTargetSize']
+                    : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            splashRadius: namedArgs.containsKey('splashRadius')
+                ? namedArgs['splashRadius']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,9 +117,10 @@ class SwitchThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'SwitchTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => SwitchTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SwitchTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -106,7 +134,7 @@ extension SwitchThemeBinding on SwitchTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SwitchTheme');
+        return const HTType('SwitchTheme');
       case 'data':
         return data;
       case 'child':
@@ -116,31 +144,44 @@ extension SwitchThemeBinding on SwitchTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/tab_bar_theme.g.dart b/lib/bindings/flutter/material/tab_bar_theme.g.dart
index f0b4a29..4a29234 100644
--- a/lib/bindings/flutter/material/tab_bar_theme.g.dart
+++ b/lib/bindings/flutter/material/tab_bar_theme.g.dart
@@ -12,22 +12,35 @@ class TabBarThemeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TabBarTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => TabBarTheme(
-            indicator: namedArgs.containsKey('indicator') ? namedArgs['indicator'] : null,
-            indicatorSize: namedArgs.containsKey('indicatorSize') ? namedArgs['indicatorSize'] : null,
-            labelColor: namedArgs.containsKey('labelColor') ? namedArgs['labelColor'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            unselectedLabelColor:
-                namedArgs.containsKey('unselectedLabelColor') ? namedArgs['unselectedLabelColor'] : null,
-            unselectedLabelStyle:
-                namedArgs.containsKey('unselectedLabelStyle') ? namedArgs['unselectedLabelStyle'] : null);
+            indicator: namedArgs.containsKey('indicator')
+                ? namedArgs['indicator']
+                : null,
+            indicatorSize: namedArgs.containsKey('indicatorSize')
+                ? namedArgs['indicatorSize']
+                : null,
+            labelColor: namedArgs.containsKey('labelColor')
+                ? namedArgs['labelColor']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            unselectedLabelColor: namedArgs.containsKey('unselectedLabelColor')
+                ? namedArgs['unselectedLabelColor']
+                : null,
+            unselectedLabelStyle: namedArgs.containsKey('unselectedLabelStyle')
+                ? namedArgs['unselectedLabelStyle']
+                : null);
       case 'TabBarTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => TabBarTheme.of(positionalArgs[0]);
-      case 'TabBarTheme.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TabBarTheme.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            TabBarTheme.of(positionalArgs[0]);
+      case 'TabBarTheme.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => TabBarTheme.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -41,7 +54,7 @@ extension TabBarThemeBinding on TabBarTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TabBarTheme');
+        return const HTType('TabBarTheme');
       case 'indicator':
         return indicator;
       case 'indicatorSize':
@@ -60,26 +73,40 @@ extension TabBarThemeBinding on TabBarTheme {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            indicator: namedArgs.containsKey('indicator') ? namedArgs['indicator'] : null,
-            indicatorSize: namedArgs.containsKey('indicatorSize') ? namedArgs['indicatorSize'] : null,
-            labelColor: namedArgs.containsKey('labelColor') ? namedArgs['labelColor'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            unselectedLabelColor:
-                namedArgs.containsKey('unselectedLabelColor') ? namedArgs['unselectedLabelColor'] : null,
-            unselectedLabelStyle:
-                namedArgs.containsKey('unselectedLabelStyle') ? namedArgs['unselectedLabelStyle'] : null);
+            indicator: namedArgs.containsKey('indicator')
+                ? namedArgs['indicator']
+                : null,
+            indicatorSize: namedArgs.containsKey('indicatorSize')
+                ? namedArgs['indicatorSize']
+                : null,
+            labelColor: namedArgs.containsKey('labelColor')
+                ? namedArgs['labelColor']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            unselectedLabelColor: namedArgs.containsKey('unselectedLabelColor')
+                ? namedArgs['unselectedLabelColor']
+                : null,
+            unselectedLabelStyle: namedArgs.containsKey('unselectedLabelStyle')
+                ? namedArgs['unselectedLabelStyle']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/tab_controller.g.dart b/lib/bindings/flutter/material/tab_controller.g.dart
index 852357d..4bd75e7 100644
--- a/lib/bindings/flutter/material/tab_controller.g.dart
+++ b/lib/bindings/flutter/material/tab_controller.g.dart
@@ -10,11 +10,13 @@ class TabControllerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TabController':
         return ({positionalArgs, namedArgs, typeArgs}) => TabController(
-            initialIndex: namedArgs.containsKey('initialIndex') ? namedArgs['initialIndex'] : 0,
+            initialIndex: namedArgs.containsKey('initialIndex')
+                ? namedArgs['initialIndex']
+                : 0,
             length: namedArgs['length'],
             vsync: namedArgs['vsync']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +32,8 @@ class TabControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -39,7 +42,7 @@ extension TabControllerBinding on TabController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TabController');
+        return const HTType('TabController');
       case 'length':
         return length;
       case 'animation':
@@ -53,17 +56,24 @@ extension TabControllerBinding on TabController {
       case 'offset':
         return offset;
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : kTabScrollDuration,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : kTabScrollDuration,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -76,7 +86,7 @@ extension TabControllerBinding on TabController {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -91,12 +101,15 @@ class DefaultTabControllerAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => DefaultTabController(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             length: namedArgs['length'],
-            initialIndex: namedArgs.containsKey('initialIndex') ? namedArgs['initialIndex'] : 0,
+            initialIndex: namedArgs.containsKey('initialIndex')
+                ? namedArgs['initialIndex']
+                : 0,
             child: namedArgs['child']);
       case 'DefaultTabController.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultTabController.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultTabController.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,7 +123,7 @@ extension DefaultTabControllerBinding on DefaultTabController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultTabController');
+        return const HTType('DefaultTabController');
       case 'length':
         return length;
       case 'initialIndex':
@@ -128,25 +141,37 @@ extension DefaultTabControllerBinding on DefaultTabController {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/tab_indicator.g.dart b/lib/bindings/flutter/material/tab_indicator.g.dart
index 937d902..bcf42c3 100644
--- a/lib/bindings/flutter/material/tab_indicator.g.dart
+++ b/lib/bindings/flutter/material/tab_indicator.g.dart
@@ -13,9 +13,11 @@ class UnderlineTabIndicatorAutoBinding extends HTExternalClass {
             borderSide: namedArgs.containsKey('borderSide')
                 ? namedArgs['borderSide']
                 : const BorderSide(width: 2.0, color: Colors.white),
-            insets: namedArgs.containsKey('insets') ? namedArgs['insets'] : EdgeInsets.zero);
+            insets: namedArgs.containsKey('insets')
+                ? namedArgs['insets']
+                : EdgeInsets.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +28,8 @@ class UnderlineTabIndicatorAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -35,7 +38,7 @@ extension UnderlineTabIndicatorBinding on UnderlineTabIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UnderlineTabIndicator');
+        return const HTType('UnderlineTabIndicator');
       case 'borderSide':
         return borderSide;
       case 'insets':
@@ -45,30 +48,38 @@ extension UnderlineTabIndicatorBinding on UnderlineTabIndicator {
       case 'isComplex':
         return isComplex;
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
-      case 'createBoxPainter':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            createBoxPainter(positionalArgs.length > 0 ? positionalArgs[0] : null);
+            lerpTo(positionalArgs[0], positionalArgs[1]);
+      case 'createBoxPainter':
+        return ({positionalArgs, namedArgs, typeArgs}) => createBoxPainter(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'getClipPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getClipPath(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getClipPath(positionalArgs[0], positionalArgs[1]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/tabs.g.dart b/lib/bindings/flutter/material/tabs.g.dart
index 6868ae2..6f707fc 100644
--- a/lib/bindings/flutter/material/tabs.g.dart
+++ b/lib/bindings/flutter/material/tabs.g.dart
@@ -18,7 +18,7 @@ class TabBarIndicatorSizeAutoBinding extends HTExternalClass {
       case 'TabBarIndicatorSize.label':
         return TabBarIndicatorSize.label;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class TabBarIndicatorSizeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TabBarIndicatorSize');
+        return const HTType('TabBarIndicatorSize');
       case 'index':
         return (instance as TabBarIndicatorSize).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TabBarIndicatorSize).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TabBarIndicatorSize).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,11 +49,12 @@ class TabAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             text: namedArgs.containsKey('text') ? namedArgs['text'] : null,
             icon: namedArgs.containsKey('icon') ? namedArgs['icon'] : null,
-            iconMargin:
-                namedArgs.containsKey('iconMargin') ? namedArgs['iconMargin'] : const EdgeInsets.only(bottom: 10.0),
+            iconMargin: namedArgs.containsKey('iconMargin')
+                ? namedArgs['iconMargin']
+                : const EdgeInsets.only(bottom: 10.0),
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +68,7 @@ extension TabBinding on Tab {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Tab');
+        return const HTType('Tab');
       case 'text':
         return text;
       case 'child':
@@ -80,31 +82,44 @@ extension TabBinding on Tab {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -119,33 +134,63 @@ class TabBarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => TabBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             tabs: List<Widget>.from(namedArgs['tabs']),
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            isScrollable: namedArgs.containsKey('isScrollable') ? namedArgs['isScrollable'] : false,
-            indicatorColor: namedArgs.containsKey('indicatorColor') ? namedArgs['indicatorColor'] : null,
-            automaticIndicatorColorAdjustment: namedArgs.containsKey('automaticIndicatorColorAdjustment')
-                ? namedArgs['automaticIndicatorColorAdjustment']
-                : true,
-            indicatorWeight: namedArgs.containsKey('indicatorWeight') ? namedArgs['indicatorWeight'] : 2.0,
-            indicatorPadding:
-                namedArgs.containsKey('indicatorPadding') ? namedArgs['indicatorPadding'] : EdgeInsets.zero,
-            indicator: namedArgs.containsKey('indicator') ? namedArgs['indicator'] : null,
-            indicatorSize: namedArgs.containsKey('indicatorSize') ? namedArgs['indicatorSize'] : null,
-            labelColor: namedArgs.containsKey('labelColor') ? namedArgs['labelColor'] : null,
-            labelStyle: namedArgs.containsKey('labelStyle') ? namedArgs['labelStyle'] : null,
-            labelPadding: namedArgs.containsKey('labelPadding') ? namedArgs['labelPadding'] : null,
-            unselectedLabelColor:
-                namedArgs.containsKey('unselectedLabelColor') ? namedArgs['unselectedLabelColor'] : null,
-            unselectedLabelStyle:
-                namedArgs.containsKey('unselectedLabelStyle') ? namedArgs['unselectedLabelStyle'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            overlayColor: namedArgs.containsKey('overlayColor') ? namedArgs['overlayColor'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            isScrollable: namedArgs.containsKey('isScrollable')
+                ? namedArgs['isScrollable']
+                : false,
+            indicatorColor: namedArgs.containsKey('indicatorColor')
+                ? namedArgs['indicatorColor']
+                : null,
+            automaticIndicatorColorAdjustment:
+                namedArgs.containsKey('automaticIndicatorColorAdjustment')
+                    ? namedArgs['automaticIndicatorColorAdjustment']
+                    : true,
+            indicatorWeight: namedArgs.containsKey('indicatorWeight')
+                ? namedArgs['indicatorWeight']
+                : 2.0,
+            indicatorPadding: namedArgs.containsKey('indicatorPadding')
+                ? namedArgs['indicatorPadding']
+                : EdgeInsets.zero,
+            indicator: namedArgs.containsKey('indicator')
+                ? namedArgs['indicator']
+                : null,
+            indicatorSize: namedArgs.containsKey('indicatorSize')
+                ? namedArgs['indicatorSize']
+                : null,
+            labelColor: namedArgs.containsKey('labelColor')
+                ? namedArgs['labelColor']
+                : null,
+            labelStyle: namedArgs.containsKey('labelStyle')
+                ? namedArgs['labelStyle']
+                : null,
+            labelPadding: namedArgs.containsKey('labelPadding')
+                ? namedArgs['labelPadding']
+                : null,
+            unselectedLabelColor: namedArgs.containsKey('unselectedLabelColor')
+                ? namedArgs['unselectedLabelColor']
+                : null,
+            unselectedLabelStyle: namedArgs.containsKey('unselectedLabelStyle')
+                ? namedArgs['unselectedLabelStyle']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            overlayColor: namedArgs.containsKey('overlayColor')
+                ? namedArgs['overlayColor']
+                : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null);
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -159,7 +204,7 @@ extension TabBarBinding on TabBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TabBar');
+        return const HTType('TabBar');
       case 'tabs':
         return tabs;
       case 'controller':
@@ -213,25 +258,37 @@ extension TabBarBinding on TabBar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -245,13 +302,17 @@ class TabBarViewAutoBinding extends HTExternalClass {
       case 'TabBarView':
         return ({positionalArgs, namedArgs, typeArgs}) => TabBarView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             children: List<Widget>.from(namedArgs['children']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -265,7 +326,7 @@ extension TabBarViewBinding on TabBarView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TabBarView');
+        return const HTType('TabBarView');
       case 'controller':
         return controller;
       case 'children':
@@ -285,25 +346,37 @@ extension TabBarViewBinding on TabBarView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -315,13 +388,14 @@ class TabPageSelectorIndicatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TabPageSelectorIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => TabPageSelectorIndicator(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            backgroundColor: namedArgs['backgroundColor'],
-            borderColor: namedArgs['borderColor'],
-            size: namedArgs['size']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TabPageSelectorIndicator(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                backgroundColor: namedArgs['backgroundColor'],
+                borderColor: namedArgs['borderColor'],
+                size: namedArgs['size']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -335,7 +409,7 @@ extension TabPageSelectorIndicatorBinding on TabPageSelectorIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TabPageSelectorIndicator');
+        return const HTType('TabPageSelectorIndicator');
       case 'backgroundColor':
         return backgroundColor;
       case 'borderColor':
@@ -347,31 +421,44 @@ extension TabPageSelectorIndicatorBinding on TabPageSelectorIndicator {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -385,12 +472,18 @@ class TabPageSelectorAutoBinding extends HTExternalClass {
       case 'TabPageSelector':
         return ({positionalArgs, namedArgs, typeArgs}) => TabPageSelector(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            indicatorSize: namedArgs.containsKey('indicatorSize') ? namedArgs['indicatorSize'] : 12.0,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            indicatorSize: namedArgs.containsKey('indicatorSize')
+                ? namedArgs['indicatorSize']
+                : 12.0,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null);
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -404,7 +497,7 @@ extension TabPageSelectorBinding on TabPageSelector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TabPageSelector');
+        return const HTType('TabPageSelector');
       case 'controller':
         return controller;
       case 'indicatorSize':
@@ -418,31 +511,44 @@ extension TabPageSelectorBinding on TabPageSelector {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_button.g.dart b/lib/bindings/flutter/material/text_button.g.dart
index 5f7c105..6837418 100644
--- a/lib/bindings/flutter/material/text_button.g.dart
+++ b/lib/bindings/flutter/material/text_button.g.dart
@@ -15,44 +15,88 @@ class TextButtonAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => TextButton(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             child: namedArgs['child']);
       case 'TextButton.icon':
         return ({positionalArgs, namedArgs, typeArgs}) => TextButton.icon(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             onPressed: namedArgs['onPressed'],
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : null,
             icon: namedArgs['icon'],
             label: namedArgs['label']);
       case 'TextButton.styleFrom':
         return ({positionalArgs, namedArgs, typeArgs}) => TextButton.styleFrom(
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            onSurface: namedArgs.containsKey('onSurface') ? namedArgs['onSurface'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            minimumSize: namedArgs.containsKey('minimumSize') ? namedArgs['minimumSize'] : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            onSurface: namedArgs.containsKey('onSurface')
+                ? namedArgs['onSurface']
+                : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            minimumSize: namedArgs.containsKey('minimumSize')
+                ? namedArgs['minimumSize']
+                : null,
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            enabledMouseCursor: namedArgs.containsKey('enabledMouseCursor') ? namedArgs['enabledMouseCursor'] : null,
-            disabledMouseCursor: namedArgs.containsKey('disabledMouseCursor') ? namedArgs['disabledMouseCursor'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            tapTargetSize: namedArgs.containsKey('tapTargetSize') ? namedArgs['tapTargetSize'] : null,
-            animationDuration: namedArgs.containsKey('animationDuration') ? namedArgs['animationDuration'] : null,
-            enableFeedback: namedArgs.containsKey('enableFeedback') ? namedArgs['enableFeedback'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null);
+            enabledMouseCursor: namedArgs.containsKey('enabledMouseCursor')
+                ? namedArgs['enabledMouseCursor']
+                : null,
+            disabledMouseCursor: namedArgs.containsKey('disabledMouseCursor')
+                ? namedArgs['disabledMouseCursor']
+                : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            tapTargetSize: namedArgs.containsKey('tapTargetSize')
+                ? namedArgs['tapTargetSize']
+                : null,
+            animationDuration: namedArgs.containsKey('animationDuration')
+                ? namedArgs['animationDuration']
+                : null,
+            enableFeedback: namedArgs.containsKey('enableFeedback')
+                ? namedArgs['enableFeedback']
+                : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,7 +107,8 @@ class TextButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -72,7 +117,7 @@ extension TextButtonBinding on TextButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextButton');
+        return const HTType('TextButton');
       case 'onPressed':
         return onPressed;
       case 'onLongPress':
@@ -94,35 +139,49 @@ extension TextButtonBinding on TextButton {
       case 'hashCode':
         return hashCode;
       case 'defaultStyleOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultStyleOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultStyleOf(positionalArgs[0]);
       case 'themeStyleOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => themeStyleOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            themeStyleOf(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_button_theme.g.dart b/lib/bindings/flutter/material/text_button_theme.g.dart
index 619eb75..3163281 100644
--- a/lib/bindings/flutter/material/text_button_theme.g.dart
+++ b/lib/bindings/flutter/material/text_button_theme.g.dart
@@ -10,13 +10,14 @@ class TextButtonThemeDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextButtonThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextButtonThemeData(style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => TextButtonThemeData(
+            style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'TextButtonThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextButtonThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            TextButtonThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,24 +31,27 @@ extension TextButtonThemeDataBinding on TextButtonThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextButtonThemeData');
+        return const HTType('TextButtonThemeData');
       case 'style':
         return style;
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -64,9 +68,10 @@ class TextButtonThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'TextButtonTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextButtonTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextButtonTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,7 +85,7 @@ extension TextButtonThemeBinding on TextButtonTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextButtonTheme');
+        return const HTType('TextButtonTheme');
       case 'data':
         return data;
       case 'child':
@@ -90,33 +95,47 @@ extension TextButtonThemeBinding on TextButtonTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_field.g.dart b/lib/bindings/flutter/material/text_field.g.dart
index 5b98ff6..9ecd36a 100644
--- a/lib/bindings/flutter/material/text_field.g.dart
+++ b/lib/bindings/flutter/material/text_field.g.dart
@@ -17,59 +17,109 @@ class TextFieldAutoBinding extends HTExternalClass {
       case 'TextField':
         return ({positionalArgs, namedArgs, typeArgs}) => TextField(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : const InputDecoration(),
-            keyboardType: namedArgs.containsKey('keyboardType') ? namedArgs['keyboardType'] : null,
-            textInputAction: namedArgs.containsKey('textInputAction') ? namedArgs['textInputAction'] : null,
-            textCapitalization:
-                namedArgs.containsKey('textCapitalization') ? namedArgs['textCapitalization'] : TextCapitalization.none,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : const InputDecoration(),
+            keyboardType: namedArgs.containsKey('keyboardType')
+                ? namedArgs['keyboardType']
+                : null,
+            textInputAction: namedArgs.containsKey('textInputAction')
+                ? namedArgs['textInputAction']
+                : null,
+            textCapitalization: namedArgs.containsKey('textCapitalization')
+                ? namedArgs['textCapitalization']
+                : TextCapitalization.none,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textAlignVertical: namedArgs.containsKey('textAlignVertical') ? namedArgs['textAlignVertical'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            obscuringCharacter: namedArgs.containsKey('obscuringCharacter') ? namedArgs['obscuringCharacter'] : '•',
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            autocorrect: namedArgs.containsKey('autocorrect') ? namedArgs['autocorrect'] : true,
-            smartDashesType: namedArgs.containsKey('smartDashesType') ? namedArgs['smartDashesType'] : null,
-            smartQuotesType: namedArgs.containsKey('smartQuotesType') ? namedArgs['smartQuotesType'] : null,
-            enableSuggestions: namedArgs.containsKey('enableSuggestions') ? namedArgs['enableSuggestions'] : true,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            expands: namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
-            maxLength: namedArgs.containsKey('maxLength') ? namedArgs['maxLength'] : null,
-            maxLengthEnforcement:
-                namedArgs.containsKey('maxLengthEnforcement') ? namedArgs['maxLengthEnforcement'] : null,
-            onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
-            onEditingComplete: namedArgs.containsKey('onEditingComplete') ? namedArgs['onEditingComplete'] : null,
-            onSubmitted: namedArgs.containsKey('onSubmitted') ? namedArgs['onSubmitted'] : null,
-            onAppPrivateCommand: namedArgs.containsKey('onAppPrivateCommand') ? namedArgs['onAppPrivateCommand'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textAlignVertical: namedArgs.containsKey('textAlignVertical')
+                ? namedArgs['textAlignVertical']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : false,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions')
+                ? namedArgs['toolbarOptions']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            obscuringCharacter: namedArgs.containsKey('obscuringCharacter')
+                ? namedArgs['obscuringCharacter']
+                : '•',
+            obscureText: namedArgs.containsKey('obscureText')
+                ? namedArgs['obscureText']
+                : false,
+            autocorrect: namedArgs.containsKey('autocorrect')
+                ? namedArgs['autocorrect']
+                : true,
+            smartDashesType: namedArgs.containsKey('smartDashesType')
+                ? namedArgs['smartDashesType']
+                : null,
+            smartQuotesType: namedArgs.containsKey('smartQuotesType')
+                ? namedArgs['smartQuotesType']
+                : null,
+            enableSuggestions: namedArgs.containsKey('enableSuggestions')
+                ? namedArgs['enableSuggestions']
+                : true,
+            maxLines:
+                namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            expands:
+                namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
+            maxLength: namedArgs.containsKey('maxLength')
+                ? namedArgs['maxLength']
+                : null,
+            maxLengthEnforcement: namedArgs.containsKey('maxLengthEnforcement')
+                ? namedArgs['maxLengthEnforcement']
+                : null,
+            onChanged: namedArgs.containsKey('onChanged')
+                ? namedArgs['onChanged']
+                : null,
+            onEditingComplete: namedArgs.containsKey('onEditingComplete')
+                ? namedArgs['onEditingComplete']
+                : null,
+            onSubmitted: namedArgs.containsKey('onSubmitted')
+                ? namedArgs['onSubmitted']
+                : null,
+            onAppPrivateCommand: namedArgs.containsKey('onAppPrivateCommand')
+                ? namedArgs['onAppPrivateCommand']
+                : null,
             inputFormatters: namedArgs.containsKey('inputFormatters')
                 ? List<TextInputFormatter>.from(namedArgs['inputFormatters'])
                 : null,
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
-            cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
+            enabled:
+                namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
+            cursorWidth: namedArgs.containsKey('cursorWidth')
+                ? namedArgs['cursorWidth']
+                : 2.0,
             cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
             cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : null,
             cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle')
-                ? namedArgs['selectionHeightStyle']
-                : ui.BoxHeightStyle.tight,
-            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle')
-                ? namedArgs['selectionWidthStyle']
-                : ui.BoxWidthStyle.tight,
+            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle') ? namedArgs['selectionHeightStyle'] : ui.BoxHeightStyle.tight,
+            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle') ? namedArgs['selectionWidthStyle'] : ui.BoxWidthStyle.tight,
             keyboardAppearance: namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : null,
-            scrollPadding:
-                namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
+            scrollPadding: namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            enableInteractiveSelection: namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
             selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
             mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
@@ -81,7 +131,7 @@ class TextFieldAutoBinding extends HTExternalClass {
       case 'TextField.noMaxLength':
         return TextField.noMaxLength;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -92,14 +142,21 @@ class TextFieldAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AppPrivateCommandCallback': (HTFunction function) =>
-          (arg1, arg2) => function.call(positionalArgs: [arg1, arg2], namedArgs: const {}),
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'InputCounterWidgetBuilder': (HTFunction function) => (context, {currentLength, maxLength, isFocused}) => function
-          .call(
-              positionalArgs: [context],
-              namedArgs: {'currentLength': currentLength, 'maxLength': maxLength, 'isFocused': isFocused}) as Widget?,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AppPrivateCommandCallback': (HTFunction function) => (arg1, arg2) =>
+          function.call(positionalArgs: [arg1, arg2], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'InputCounterWidgetBuilder': (HTFunction function) => (context,
+              {currentLength, maxLength, isFocused}) =>
+          function.call(positionalArgs: [
+            context
+          ], namedArgs: {
+            'currentLength': currentLength,
+            'maxLength': maxLength,
+            'isFocused': isFocused
+          }) as Widget?,
     };
   }
 }
@@ -108,7 +165,7 @@ extension TextFieldBinding on TextField {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextField');
+        return const HTType('TextField');
       case 'controller':
         return controller;
       case 'focusNode':
@@ -218,29 +275,41 @@ extension TextFieldBinding on TextField {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_form_field.g.dart b/lib/bindings/flutter/material/text_form_field.g.dart
index e305a6f..2de3e6d 100644
--- a/lib/bindings/flutter/material/text_form_field.g.dart
+++ b/lib/bindings/flutter/material/text_form_field.g.dart
@@ -12,61 +12,114 @@ class TextFormFieldAutoBinding extends HTExternalClass {
       case 'TextFormField':
         return ({positionalArgs, namedArgs, typeArgs}) => TextFormField(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            initialValue: namedArgs.containsKey('initialValue') ? namedArgs['initialValue'] : null,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : const InputDecoration(),
-            keyboardType: namedArgs.containsKey('keyboardType') ? namedArgs['keyboardType'] : null,
-            textCapitalization:
-                namedArgs.containsKey('textCapitalization') ? namedArgs['textCapitalization'] : TextCapitalization.none,
-            textInputAction: namedArgs.containsKey('textInputAction') ? namedArgs['textInputAction'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            initialValue: namedArgs.containsKey('initialValue')
+                ? namedArgs['initialValue']
+                : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : const InputDecoration(),
+            keyboardType: namedArgs.containsKey('keyboardType')
+                ? namedArgs['keyboardType']
+                : null,
+            textCapitalization: namedArgs.containsKey('textCapitalization')
+                ? namedArgs['textCapitalization']
+                : TextCapitalization.none,
+            textInputAction: namedArgs.containsKey('textInputAction')
+                ? namedArgs['textInputAction']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textAlignVertical: namedArgs.containsKey('textAlignVertical') ? namedArgs['textAlignVertical'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : null,
-            obscuringCharacter: namedArgs.containsKey('obscuringCharacter') ? namedArgs['obscuringCharacter'] : '•',
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            autocorrect: namedArgs.containsKey('autocorrect') ? namedArgs['autocorrect'] : true,
-            smartDashesType: namedArgs.containsKey('smartDashesType') ? namedArgs['smartDashesType'] : null,
-            smartQuotesType: namedArgs.containsKey('smartQuotesType') ? namedArgs['smartQuotesType'] : null,
-            enableSuggestions: namedArgs.containsKey('enableSuggestions') ? namedArgs['enableSuggestions'] : true,
-            maxLengthEnforcement:
-                namedArgs.containsKey('maxLengthEnforcement') ? namedArgs['maxLengthEnforcement'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            expands: namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
-            maxLength: namedArgs.containsKey('maxLength') ? namedArgs['maxLength'] : null,
-            onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textAlignVertical: namedArgs.containsKey('textAlignVertical')
+                ? namedArgs['textAlignVertical']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : false,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions')
+                ? namedArgs['toolbarOptions']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : null,
+            obscuringCharacter: namedArgs.containsKey('obscuringCharacter')
+                ? namedArgs['obscuringCharacter']
+                : '•',
+            obscureText: namedArgs.containsKey('obscureText')
+                ? namedArgs['obscureText']
+                : false,
+            autocorrect: namedArgs.containsKey('autocorrect')
+                ? namedArgs['autocorrect']
+                : true,
+            smartDashesType: namedArgs.containsKey('smartDashesType')
+                ? namedArgs['smartDashesType']
+                : null,
+            smartQuotesType: namedArgs.containsKey('smartQuotesType')
+                ? namedArgs['smartQuotesType']
+                : null,
+            enableSuggestions: namedArgs.containsKey('enableSuggestions')
+                ? namedArgs['enableSuggestions']
+                : true,
+            maxLengthEnforcement: namedArgs.containsKey('maxLengthEnforcement')
+                ? namedArgs['maxLengthEnforcement']
+                : null,
+            maxLines:
+                namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            expands:
+                namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
+            maxLength: namedArgs.containsKey('maxLength')
+                ? namedArgs['maxLength']
+                : null,
+            onChanged: namedArgs.containsKey('onChanged')
+                ? namedArgs['onChanged']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onEditingComplete: namedArgs.containsKey('onEditingComplete') ? namedArgs['onEditingComplete'] : null,
-            onFieldSubmitted: namedArgs.containsKey('onFieldSubmitted') ? namedArgs['onFieldSubmitted'] : null,
-            onSaved: namedArgs.containsKey('onSaved') ? namedArgs['onSaved'] : null,
-            validator: namedArgs.containsKey('validator') ? namedArgs['validator'] : null,
-            inputFormatters: namedArgs.containsKey('inputFormatters')
-                ? List<TextInputFormatter>.from(namedArgs['inputFormatters'])
+            onEditingComplete: namedArgs.containsKey('onEditingComplete')
+                ? namedArgs['onEditingComplete']
                 : null,
+            onFieldSubmitted: namedArgs.containsKey('onFieldSubmitted')
+                ? namedArgs['onFieldSubmitted']
+                : null,
+            onSaved:
+                namedArgs.containsKey('onSaved') ? namedArgs['onSaved'] : null,
+            validator: namedArgs.containsKey('validator')
+                ? namedArgs['validator']
+                : null,
+            inputFormatters: namedArgs.containsKey('inputFormatters') ? List<TextInputFormatter>.from(namedArgs['inputFormatters']) : null,
             enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
             cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
             cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
             cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : null,
             cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
             keyboardAppearance: namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : null,
-            scrollPadding:
-                namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
-            enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
+            scrollPadding: namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
+            enableInteractiveSelection: namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
             selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
             buildCounter: namedArgs.containsKey('buildCounter') ? namedArgs['buildCounter'] : null,
             scrollPhysics: namedArgs.containsKey('scrollPhysics') ? namedArgs['scrollPhysics'] : null,
             autofillHints: namedArgs.containsKey('autofillHints') ? namedArgs['autofillHints'] : null,
             autovalidateMode: namedArgs.containsKey('autovalidateMode') ? namedArgs['autovalidateMode'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -77,12 +130,19 @@ class TextFormFieldAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'InputCounterWidgetBuilder': (HTFunction function) => (context, {currentLength, maxLength, isFocused}) => function
-          .call(
-              positionalArgs: [context],
-              namedArgs: {'currentLength': currentLength, 'maxLength': maxLength, 'isFocused': isFocused}) as Widget?,
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'InputCounterWidgetBuilder': (HTFunction function) => (context,
+              {currentLength, maxLength, isFocused}) =>
+          function.call(positionalArgs: [
+            context
+          ], namedArgs: {
+            'currentLength': currentLength,
+            'maxLength': maxLength,
+            'isFocused': isFocused
+          }) as Widget?,
     };
   }
 }
@@ -91,7 +151,7 @@ extension TextFormFieldBinding on TextFormField {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextFormField');
+        return const HTType('TextFormField');
       case 'controller':
         return controller;
       case 'onSaved':
@@ -117,25 +177,37 @@ extension TextFormFieldBinding on TextFormField {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_selection.g.dart b/lib/bindings/flutter/material/text_selection.g.dart
index 47e5e58..0d8a0c0 100644
--- a/lib/bindings/flutter/material/text_selection.g.dart
+++ b/lib/bindings/flutter/material/text_selection.g.dart
@@ -3,15 +3,17 @@ import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
 
 class MaterialTextSelectionControlsAutoBinding extends HTExternalClass {
-  MaterialTextSelectionControlsAutoBinding() : super('MaterialTextSelectionControls');
+  MaterialTextSelectionControlsAutoBinding()
+      : super('MaterialTextSelectionControls');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialTextSelectionControls':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaterialTextSelectionControls();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaterialTextSelectionControls();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,13 +23,15 @@ class MaterialTextSelectionControlsAutoBinding extends HTExternalClass {
   }
 }
 
-extension MaterialTextSelectionControlsBinding on MaterialTextSelectionControls {
+extension MaterialTextSelectionControlsBinding
+    on MaterialTextSelectionControls {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialTextSelectionControls');
+        return const HTType('MaterialTextSelectionControls');
       case 'getHandleSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHandleSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHandleSize(positionalArgs[0]);
       case 'buildToolbar':
         return ({positionalArgs, namedArgs, typeArgs}) => buildToolbar(
             positionalArgs[0],
@@ -39,28 +43,37 @@ extension MaterialTextSelectionControlsBinding on MaterialTextSelectionControls
             positionalArgs[6],
             positionalArgs[7]);
       case 'buildHandle':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            buildHandle(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => buildHandle(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'getHandleAnchor':
-        return ({positionalArgs, namedArgs, typeArgs}) => getHandleAnchor(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getHandleAnchor(positionalArgs[0], positionalArgs[1]);
       case 'canSelectAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => canSelectAll(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canSelectAll(positionalArgs[0]);
       case 'canCut':
-        return ({positionalArgs, namedArgs, typeArgs}) => canCut(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canCut(positionalArgs[0]);
       case 'canCopy':
-        return ({positionalArgs, namedArgs, typeArgs}) => canCopy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canCopy(positionalArgs[0]);
       case 'canPaste':
-        return ({positionalArgs, namedArgs, typeArgs}) => canPaste(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            canPaste(positionalArgs[0]);
       case 'handleCut':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleCut(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleCut(positionalArgs[0]);
       case 'handleCopy':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleCopy(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleCopy(positionalArgs[0], positionalArgs[1]);
       case 'handlePaste':
-        return ({positionalArgs, namedArgs, typeArgs}) => handlePaste(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handlePaste(positionalArgs[0]);
       case 'handleSelectAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleSelectAll(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleSelectAll(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_selection_theme.g.dart b/lib/bindings/flutter/material/text_selection_theme.g.dart
index 9b56508..b35d771 100644
--- a/lib/bindings/flutter/material/text_selection_theme.g.dart
+++ b/lib/bindings/flutter/material/text_selection_theme.g.dart
@@ -10,16 +10,24 @@ class TextSelectionThemeDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextSelectionThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelectionThemeData(
-            cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            selectionColor: namedArgs.containsKey('selectionColor') ? namedArgs['selectionColor'] : null,
-            selectionHandleColor:
-                namedArgs.containsKey('selectionHandleColor') ? namedArgs['selectionHandleColor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelectionThemeData(
+                cursorColor: namedArgs.containsKey('cursorColor')
+                    ? namedArgs['cursorColor']
+                    : null,
+                selectionColor: namedArgs.containsKey('selectionColor')
+                    ? namedArgs['selectionColor']
+                    : null,
+                selectionHandleColor:
+                    namedArgs.containsKey('selectionHandleColor')
+                        ? namedArgs['selectionHandleColor']
+                        : null);
       case 'TextSelectionThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextSelectionThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            TextSelectionThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +41,7 @@ extension TextSelectionThemeDataBinding on TextSelectionThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionThemeData');
+        return const HTType('TextSelectionThemeData');
       case 'cursorColor':
         return cursorColor;
       case 'selectionColor':
@@ -44,23 +52,31 @@ extension TextSelectionThemeDataBinding on TextSelectionThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            selectionColor: namedArgs.containsKey('selectionColor') ? namedArgs['selectionColor'] : null,
-            selectionHandleColor:
-                namedArgs.containsKey('selectionHandleColor') ? namedArgs['selectionHandleColor'] : null);
+            cursorColor: namedArgs.containsKey('cursorColor')
+                ? namedArgs['cursorColor']
+                : null,
+            selectionColor: namedArgs.containsKey('selectionColor')
+                ? namedArgs['selectionColor']
+                : null,
+            selectionHandleColor: namedArgs.containsKey('selectionHandleColor')
+                ? namedArgs['selectionHandleColor']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -77,9 +93,10 @@ class TextSelectionThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'TextSelectionTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelectionTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelectionTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -93,7 +110,7 @@ extension TextSelectionThemeBinding on TextSelectionTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionTheme');
+        return const HTType('TextSelectionTheme');
       case 'data':
         return data;
       case 'child':
@@ -103,33 +120,47 @@ extension TextSelectionThemeBinding on TextSelectionTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_selection_toolbar.g.dart b/lib/bindings/flutter/material/text_selection_toolbar.g.dart
index 87750ff..634c02d 100644
--- a/lib/bindings/flutter/material/text_selection_toolbar.g.dart
+++ b/lib/bindings/flutter/material/text_selection_toolbar.g.dart
@@ -5,7 +5,8 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
 
 class _TextSelectionToolbarContainer extends StatelessWidget {
-  const _TextSelectionToolbarContainer({Key? key, required this.child}) : super(key: key);
+  const _TextSelectionToolbarContainer({Key? key, required this.child})
+      : super(key: key);
   final Widget child;
   @override
   Widget build(BuildContext context) {
@@ -29,11 +30,12 @@ class TextSelectionToolbarAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             anchorAbove: namedArgs['anchorAbove'],
             anchorBelow: namedArgs['anchorBelow'],
-            toolbarBuilder:
-                namedArgs.containsKey('toolbarBuilder') ? namedArgs['toolbarBuilder'] : _defaultToolbarBuilder,
+            toolbarBuilder: namedArgs.containsKey('toolbarBuilder')
+                ? namedArgs['toolbarBuilder']
+                : _defaultToolbarBuilder,
             children: List<Widget>.from(namedArgs['children']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,8 +46,9 @@ class TextSelectionToolbarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ToolbarBuilder': (HTFunction function) =>
-          (context, child) => function.call(positionalArgs: [context, child], namedArgs: const {}) as Widget,
+      'ToolbarBuilder': (HTFunction function) => (context, child) =>
+          function.call(positionalArgs: [context, child], namedArgs: const {})
+              as Widget,
     };
   }
 
@@ -58,7 +61,7 @@ extension TextSelectionToolbarBinding on TextSelectionToolbar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionToolbar');
+        return const HTType('TextSelectionToolbar');
       case 'anchorAbove':
         return anchorAbove;
       case 'anchorBelow':
@@ -72,31 +75,44 @@ extension TextSelectionToolbarBinding on TextSelectionToolbar {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_selection_toolbar_text_button.g.dart b/lib/bindings/flutter/material/text_selection_toolbar_text_button.g.dart
index 738837f..0073f4e 100644
--- a/lib/bindings/flutter/material/text_selection_toolbar_text_button.g.dart
+++ b/lib/bindings/flutter/material/text_selection_toolbar_text_button.g.dart
@@ -3,22 +3,27 @@ import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 
 class TextSelectionToolbarTextButtonAutoBinding extends HTExternalClass {
-  TextSelectionToolbarTextButtonAutoBinding() : super('TextSelectionToolbarTextButton');
+  TextSelectionToolbarTextButtonAutoBinding()
+      : super('TextSelectionToolbarTextButton');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextSelectionToolbarTextButton':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelectionToolbarTextButton(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            padding: namedArgs['padding'],
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelectionToolbarTextButton(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                padding: namedArgs['padding'],
+                onPressed: namedArgs.containsKey('onPressed')
+                    ? namedArgs['onPressed']
+                    : null);
       case 'TextSelectionToolbarTextButton.getPadding':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextSelectionToolbarTextButton.getPadding(positionalArgs[0], positionalArgs[1]);
+            TextSelectionToolbarTextButton.getPadding(
+                positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,16 +34,18 @@ class TextSelectionToolbarTextButtonAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension TextSelectionToolbarTextButtonBinding on TextSelectionToolbarTextButton {
+extension TextSelectionToolbarTextButtonBinding
+    on TextSelectionToolbarTextButton {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionToolbarTextButton');
+        return const HTType('TextSelectionToolbarTextButton');
       case 'child':
         return child;
       case 'onPressed':
@@ -50,31 +57,44 @@ extension TextSelectionToolbarTextButtonBinding on TextSelectionToolbarTextButto
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/text_theme.g.dart b/lib/bindings/flutter/material/text_theme.g.dart
index f573d8d..ba67c6e 100644
--- a/lib/bindings/flutter/material/text_theme.g.dart
+++ b/lib/bindings/flutter/material/text_theme.g.dart
@@ -10,25 +10,50 @@ class TextThemeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TextTheme':
         return ({positionalArgs, namedArgs, typeArgs}) => TextTheme(
-              headline1: namedArgs.containsKey('headline1') ? namedArgs['headline1'] : null,
-              headline2: namedArgs.containsKey('headline2') ? namedArgs['headline2'] : null,
-              headline3: namedArgs.containsKey('headline3') ? namedArgs['headline3'] : null,
-              headline4: namedArgs.containsKey('headline4') ? namedArgs['headline4'] : null,
-              headline5: namedArgs.containsKey('headline5') ? namedArgs['headline5'] : null,
-              headline6: namedArgs.containsKey('headline6') ? namedArgs['headline6'] : null,
-              subtitle1: namedArgs.containsKey('subtitle1') ? namedArgs['subtitle1'] : null,
-              subtitle2: namedArgs.containsKey('subtitle2') ? namedArgs['subtitle2'] : null,
-              bodyText1: namedArgs.containsKey('bodyText1') ? namedArgs['bodyText1'] : null,
-              bodyText2: namedArgs.containsKey('bodyText2') ? namedArgs['bodyText2'] : null,
-              caption: namedArgs.containsKey('caption') ? namedArgs['caption'] : null,
-              button: namedArgs.containsKey('button') ? namedArgs['button'] : null,
-              overline: namedArgs.containsKey('overline') ? namedArgs['overline'] : null,
+              headline1: namedArgs.containsKey('headline1')
+                  ? namedArgs['headline1']
+                  : null,
+              headline2: namedArgs.containsKey('headline2')
+                  ? namedArgs['headline2']
+                  : null,
+              headline3: namedArgs.containsKey('headline3')
+                  ? namedArgs['headline3']
+                  : null,
+              headline4: namedArgs.containsKey('headline4')
+                  ? namedArgs['headline4']
+                  : null,
+              headline5: namedArgs.containsKey('headline5')
+                  ? namedArgs['headline5']
+                  : null,
+              headline6: namedArgs.containsKey('headline6')
+                  ? namedArgs['headline6']
+                  : null,
+              subtitle1: namedArgs.containsKey('subtitle1')
+                  ? namedArgs['subtitle1']
+                  : null,
+              subtitle2: namedArgs.containsKey('subtitle2')
+                  ? namedArgs['subtitle2']
+                  : null,
+              bodyText1: namedArgs.containsKey('bodyText1')
+                  ? namedArgs['bodyText1']
+                  : null,
+              bodyText2: namedArgs.containsKey('bodyText2')
+                  ? namedArgs['bodyText2']
+                  : null,
+              caption: namedArgs.containsKey('caption')
+                  ? namedArgs['caption']
+                  : null,
+              button:
+                  namedArgs.containsKey('button') ? namedArgs['button'] : null,
+              overline: namedArgs.containsKey('overline')
+                  ? namedArgs['overline']
+                  : null,
             );
       case 'TextTheme.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextTheme.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => TextTheme.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -42,7 +67,7 @@ extension TextThemeBinding on TextTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextTheme');
+        return const HTType('TextTheme');
       case 'headline1':
         return headline1;
       case 'headline2':
@@ -73,45 +98,90 @@ extension TextThemeBinding on TextTheme {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-              headline1: namedArgs.containsKey('headline1') ? namedArgs['headline1'] : null,
-              headline2: namedArgs.containsKey('headline2') ? namedArgs['headline2'] : null,
-              headline3: namedArgs.containsKey('headline3') ? namedArgs['headline3'] : null,
-              headline4: namedArgs.containsKey('headline4') ? namedArgs['headline4'] : null,
-              headline5: namedArgs.containsKey('headline5') ? namedArgs['headline5'] : null,
-              headline6: namedArgs.containsKey('headline6') ? namedArgs['headline6'] : null,
-              subtitle1: namedArgs.containsKey('subtitle1') ? namedArgs['subtitle1'] : null,
-              subtitle2: namedArgs.containsKey('subtitle2') ? namedArgs['subtitle2'] : null,
-              bodyText1: namedArgs.containsKey('bodyText1') ? namedArgs['bodyText1'] : null,
-              bodyText2: namedArgs.containsKey('bodyText2') ? namedArgs['bodyText2'] : null,
-              caption: namedArgs.containsKey('caption') ? namedArgs['caption'] : null,
-              button: namedArgs.containsKey('button') ? namedArgs['button'] : null,
-              overline: namedArgs.containsKey('overline') ? namedArgs['overline'] : null,
+              headline1: namedArgs.containsKey('headline1')
+                  ? namedArgs['headline1']
+                  : null,
+              headline2: namedArgs.containsKey('headline2')
+                  ? namedArgs['headline2']
+                  : null,
+              headline3: namedArgs.containsKey('headline3')
+                  ? namedArgs['headline3']
+                  : null,
+              headline4: namedArgs.containsKey('headline4')
+                  ? namedArgs['headline4']
+                  : null,
+              headline5: namedArgs.containsKey('headline5')
+                  ? namedArgs['headline5']
+                  : null,
+              headline6: namedArgs.containsKey('headline6')
+                  ? namedArgs['headline6']
+                  : null,
+              subtitle1: namedArgs.containsKey('subtitle1')
+                  ? namedArgs['subtitle1']
+                  : null,
+              subtitle2: namedArgs.containsKey('subtitle2')
+                  ? namedArgs['subtitle2']
+                  : null,
+              bodyText1: namedArgs.containsKey('bodyText1')
+                  ? namedArgs['bodyText1']
+                  : null,
+              bodyText2: namedArgs.containsKey('bodyText2')
+                  ? namedArgs['bodyText2']
+                  : null,
+              caption: namedArgs.containsKey('caption')
+                  ? namedArgs['caption']
+                  : null,
+              button:
+                  namedArgs.containsKey('button') ? namedArgs['button'] : null,
+              overline: namedArgs.containsKey('overline')
+                  ? namedArgs['overline']
+                  : null,
             );
       case 'merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => merge(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            merge(positionalArgs[0]);
       case 'apply':
         return ({positionalArgs, namedArgs, typeArgs}) => apply(
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontSizeFactor: namedArgs.containsKey('fontSizeFactor') ? namedArgs['fontSizeFactor'] : 1.0,
-            fontSizeDelta: namedArgs.containsKey('fontSizeDelta') ? namedArgs['fontSizeDelta'] : 0.0,
-            displayColor: namedArgs.containsKey('displayColor') ? namedArgs['displayColor'] : null,
-            bodyColor: namedArgs.containsKey('bodyColor') ? namedArgs['bodyColor'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            decorationColor: namedArgs.containsKey('decorationColor') ? namedArgs['decorationColor'] : null,
-            decorationStyle: namedArgs.containsKey('decorationStyle') ? namedArgs['decorationStyle'] : null);
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontSizeFactor: namedArgs.containsKey('fontSizeFactor')
+                ? namedArgs['fontSizeFactor']
+                : 1.0,
+            fontSizeDelta: namedArgs.containsKey('fontSizeDelta')
+                ? namedArgs['fontSizeDelta']
+                : 0.0,
+            displayColor: namedArgs.containsKey('displayColor')
+                ? namedArgs['displayColor']
+                : null,
+            bodyColor: namedArgs.containsKey('bodyColor')
+                ? namedArgs['bodyColor']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            decorationColor: namedArgs.containsKey('decorationColor')
+                ? namedArgs['decorationColor']
+                : null,
+            decorationStyle: namedArgs.containsKey('decorationStyle')
+                ? namedArgs['decorationStyle']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/theme.g.dart b/lib/bindings/flutter/material/theme.g.dart
index f5df568..219a49b 100644
--- a/lib/bindings/flutter/material/theme.g.dart
+++ b/lib/bindings/flutter/material/theme.g.dart
@@ -18,9 +18,10 @@ class ThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'Theme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Theme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Theme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +35,7 @@ extension ThemeBinding on Theme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Theme');
+        return const HTType('Theme');
       case 'data':
         return data;
       case 'child':
@@ -44,31 +45,44 @@ extension ThemeBinding on Theme {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -84,7 +98,7 @@ class ThemeDataTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -103,25 +117,30 @@ extension ThemeDataTweenBinding on ThemeDataTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ThemeDataTween');
+        return const HTType('ThemeDataTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -134,7 +153,7 @@ extension ThemeDataTweenBinding on ThemeDataTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -149,12 +168,16 @@ class AnimatedThemeAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => AnimatedTheme(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             data: namedArgs['data'],
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : kThemeAnimationDuration,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : kThemeAnimationDuration,
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -165,7 +188,8 @@ class AnimatedThemeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -174,7 +198,7 @@ extension AnimatedThemeBinding on AnimatedTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedTheme');
+        return const HTType('AnimatedTheme');
       case 'data':
         return data;
       case 'child':
@@ -192,29 +216,41 @@ extension AnimatedThemeBinding on AnimatedTheme {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/theme_data.g.dart b/lib/bindings/flutter/material/theme_data.g.dart
index a4fb7aa..27a3fe6 100644
--- a/lib/bindings/flutter/material/theme_data.g.dart
+++ b/lib/bindings/flutter/material/theme_data.g.dart
@@ -17,7 +17,7 @@ class MaterialTapTargetSizeAutoBinding extends HTExternalClass {
       case 'MaterialTapTargetSize.shrinkWrap':
         return MaterialTapTargetSize.shrinkWrap;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class MaterialTapTargetSizeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialTapTargetSize');
+        return const HTType('MaterialTapTargetSize');
       case 'index':
         return (instance as MaterialTapTargetSize).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as MaterialTapTargetSize).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as MaterialTapTargetSize).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,52 +45,80 @@ class ThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => ThemeData(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            primarySwatch: namedArgs.containsKey('primarySwatch') ? namedArgs['primarySwatch'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
-            primaryColorBrightness:
-                namedArgs.containsKey('primaryColorBrightness') ? namedArgs['primaryColorBrightness'] : null,
-            primaryColorLight: namedArgs.containsKey('primaryColorLight') ? namedArgs['primaryColorLight'] : null,
-            primaryColorDark: namedArgs.containsKey('primaryColorDark') ? namedArgs['primaryColorDark'] : null,
-            accentColor: namedArgs.containsKey('accentColor') ? namedArgs['accentColor'] : null,
-            accentColorBrightness:
-                namedArgs.containsKey('accentColorBrightness') ? namedArgs['accentColorBrightness'] : null,
-            canvasColor: namedArgs.containsKey('canvasColor') ? namedArgs['canvasColor'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
-            scaffoldBackgroundColor:
-                namedArgs.containsKey('scaffoldBackgroundColor') ? namedArgs['scaffoldBackgroundColor'] : null,
-            bottomAppBarColor: namedArgs.containsKey('bottomAppBarColor') ? namedArgs['bottomAppBarColor'] : null,
-            cardColor: namedArgs.containsKey('cardColor') ? namedArgs['cardColor'] : null,
-            dividerColor: namedArgs.containsKey('dividerColor') ? namedArgs['dividerColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            primarySwatch: namedArgs.containsKey('primarySwatch')
+                ? namedArgs['primarySwatch']
+                : null,
+            primaryColor: namedArgs.containsKey('primaryColor')
+                ? namedArgs['primaryColor']
+                : null,
+            primaryColorBrightness: namedArgs.containsKey('primaryColorBrightness')
+                ? namedArgs['primaryColorBrightness']
+                : null,
+            primaryColorLight: namedArgs.containsKey('primaryColorLight')
+                ? namedArgs['primaryColorLight']
+                : null,
+            primaryColorDark: namedArgs.containsKey('primaryColorDark')
+                ? namedArgs['primaryColorDark']
+                : null,
+            accentColor: namedArgs.containsKey('accentColor')
+                ? namedArgs['accentColor']
+                : null,
+            accentColorBrightness: namedArgs.containsKey('accentColorBrightness')
+                ? namedArgs['accentColorBrightness']
+                : null,
+            canvasColor: namedArgs.containsKey('canvasColor')
+                ? namedArgs['canvasColor']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
+            scaffoldBackgroundColor: namedArgs.containsKey('scaffoldBackgroundColor')
+                ? namedArgs['scaffoldBackgroundColor']
+                : null,
+            bottomAppBarColor: namedArgs.containsKey('bottomAppBarColor')
+                ? namedArgs['bottomAppBarColor']
+                : null,
+            cardColor: namedArgs.containsKey('cardColor')
+                ? namedArgs['cardColor']
+                : null,
+            dividerColor: namedArgs.containsKey('dividerColor')
+                ? namedArgs['dividerColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
             splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
             splashFactory: namedArgs.containsKey('splashFactory') ? namedArgs['splashFactory'] : null,
             selectedRowColor: namedArgs.containsKey('selectedRowColor') ? namedArgs['selectedRowColor'] : null,
-            unselectedWidgetColor:
-                namedArgs.containsKey('unselectedWidgetColor') ? namedArgs['unselectedWidgetColor'] : null,
+            unselectedWidgetColor: namedArgs.containsKey('unselectedWidgetColor') ? namedArgs['unselectedWidgetColor'] : null,
             disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
             buttonColor: namedArgs.containsKey('buttonColor') ? namedArgs['buttonColor'] : null,
             buttonTheme: namedArgs.containsKey('buttonTheme') ? namedArgs['buttonTheme'] : null,
             toggleButtonsTheme: namedArgs.containsKey('toggleButtonsTheme') ? namedArgs['toggleButtonsTheme'] : null,
-            secondaryHeaderColor:
-                namedArgs.containsKey('secondaryHeaderColor') ? namedArgs['secondaryHeaderColor'] : null,
+            secondaryHeaderColor: namedArgs.containsKey('secondaryHeaderColor') ? namedArgs['secondaryHeaderColor'] : null,
             backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            dialogBackgroundColor:
-                namedArgs.containsKey('dialogBackgroundColor') ? namedArgs['dialogBackgroundColor'] : null,
+            dialogBackgroundColor: namedArgs.containsKey('dialogBackgroundColor') ? namedArgs['dialogBackgroundColor'] : null,
             indicatorColor: namedArgs.containsKey('indicatorColor') ? namedArgs['indicatorColor'] : null,
             hintColor: namedArgs.containsKey('hintColor') ? namedArgs['hintColor'] : null,
             errorColor: namedArgs.containsKey('errorColor') ? namedArgs['errorColor'] : null,
-            toggleableActiveColor:
-                namedArgs.containsKey('toggleableActiveColor') ? namedArgs['toggleableActiveColor'] : null,
+            toggleableActiveColor: namedArgs.containsKey('toggleableActiveColor') ? namedArgs['toggleableActiveColor'] : null,
             fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
             textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
             primaryTextTheme: namedArgs.containsKey('primaryTextTheme') ? namedArgs['primaryTextTheme'] : null,
             accentTextTheme: namedArgs.containsKey('accentTextTheme') ? namedArgs['accentTextTheme'] : null,
-            inputDecorationTheme:
-                namedArgs.containsKey('inputDecorationTheme') ? namedArgs['inputDecorationTheme'] : null,
+            inputDecorationTheme: namedArgs.containsKey('inputDecorationTheme') ? namedArgs['inputDecorationTheme'] : null,
             iconTheme: namedArgs.containsKey('iconTheme') ? namedArgs['iconTheme'] : null,
             primaryIconTheme: namedArgs.containsKey('primaryIconTheme') ? namedArgs['primaryIconTheme'] : null,
             accentIconTheme: namedArgs.containsKey('accentIconTheme') ? namedArgs['accentIconTheme'] : null,
@@ -99,31 +128,25 @@ class ThemeDataAutoBinding extends HTExternalClass {
             cardTheme: namedArgs.containsKey('cardTheme') ? namedArgs['cardTheme'] : null,
             chipTheme: namedArgs.containsKey('chipTheme') ? namedArgs['chipTheme'] : null,
             platform: namedArgs.containsKey('platform') ? namedArgs['platform'] : null,
-            materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            applyElevationOverlayColor:
-                namedArgs.containsKey('applyElevationOverlayColor') ? namedArgs['applyElevationOverlayColor'] : null,
-            pageTransitionsTheme:
-                namedArgs.containsKey('pageTransitionsTheme') ? namedArgs['pageTransitionsTheme'] : null,
+            materialTapTargetSize: namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
+            applyElevationOverlayColor: namedArgs.containsKey('applyElevationOverlayColor') ? namedArgs['applyElevationOverlayColor'] : null,
+            pageTransitionsTheme: namedArgs.containsKey('pageTransitionsTheme') ? namedArgs['pageTransitionsTheme'] : null,
             appBarTheme: namedArgs.containsKey('appBarTheme') ? namedArgs['appBarTheme'] : null,
             scrollbarTheme: namedArgs.containsKey('scrollbarTheme') ? namedArgs['scrollbarTheme'] : null,
             bottomAppBarTheme: namedArgs.containsKey('bottomAppBarTheme') ? namedArgs['bottomAppBarTheme'] : null,
             colorScheme: namedArgs.containsKey('colorScheme') ? namedArgs['colorScheme'] : null,
             dialogTheme: namedArgs.containsKey('dialogTheme') ? namedArgs['dialogTheme'] : null,
-            floatingActionButtonTheme:
-                namedArgs.containsKey('floatingActionButtonTheme') ? namedArgs['floatingActionButtonTheme'] : null,
+            floatingActionButtonTheme: namedArgs.containsKey('floatingActionButtonTheme') ? namedArgs['floatingActionButtonTheme'] : null,
             navigationRailTheme: namedArgs.containsKey('navigationRailTheme') ? namedArgs['navigationRailTheme'] : null,
             typography: namedArgs.containsKey('typography') ? namedArgs['typography'] : null,
-            cupertinoOverrideTheme:
-                namedArgs.containsKey('cupertinoOverrideTheme') ? namedArgs['cupertinoOverrideTheme'] : null,
+            cupertinoOverrideTheme: namedArgs.containsKey('cupertinoOverrideTheme') ? namedArgs['cupertinoOverrideTheme'] : null,
             snackBarTheme: namedArgs.containsKey('snackBarTheme') ? namedArgs['snackBarTheme'] : null,
             bottomSheetTheme: namedArgs.containsKey('bottomSheetTheme') ? namedArgs['bottomSheetTheme'] : null,
             popupMenuTheme: namedArgs.containsKey('popupMenuTheme') ? namedArgs['popupMenuTheme'] : null,
             bannerTheme: namedArgs.containsKey('bannerTheme') ? namedArgs['bannerTheme'] : null,
             dividerTheme: namedArgs.containsKey('dividerTheme') ? namedArgs['dividerTheme'] : null,
             buttonBarTheme: namedArgs.containsKey('buttonBarTheme') ? namedArgs['buttonBarTheme'] : null,
-            bottomNavigationBarTheme:
-                namedArgs.containsKey('bottomNavigationBarTheme') ? namedArgs['bottomNavigationBarTheme'] : null,
+            bottomNavigationBarTheme: namedArgs.containsKey('bottomNavigationBarTheme') ? namedArgs['bottomNavigationBarTheme'] : null,
             timePickerTheme: namedArgs.containsKey('timePickerTheme') ? namedArgs['timePickerTheme'] : null,
             textButtonTheme: namedArgs.containsKey('textButtonTheme') ? namedArgs['textButtonTheme'] : null,
             elevatedButtonTheme: namedArgs.containsKey('elevatedButtonTheme') ? namedArgs['elevatedButtonTheme'] : null,
@@ -133,8 +156,7 @@ class ThemeDataAutoBinding extends HTExternalClass {
             checkboxTheme: namedArgs.containsKey('checkboxTheme') ? namedArgs['checkboxTheme'] : null,
             radioTheme: namedArgs.containsKey('radioTheme') ? namedArgs['radioTheme'] : null,
             switchTheme: namedArgs.containsKey('switchTheme') ? namedArgs['switchTheme'] : null,
-            fixTextFieldOutlineLabel:
-                namedArgs.containsKey('fixTextFieldOutlineLabel') ? namedArgs['fixTextFieldOutlineLabel'] : null);
+            fixTextFieldOutlineLabel: namedArgs.containsKey('fixTextFieldOutlineLabel') ? namedArgs['fixTextFieldOutlineLabel'] : null);
       case 'ThemeData.raw':
         return ({positionalArgs, namedArgs, typeArgs}) => ThemeData.raw(
             visualDensity: namedArgs['visualDensity'],
@@ -217,7 +239,9 @@ class ThemeDataAutoBinding extends HTExternalClass {
       case 'ThemeData.from':
         return ({positionalArgs, namedArgs, typeArgs}) => ThemeData.from(
             colorScheme: namedArgs['colorScheme'],
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null);
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null);
       case 'ThemeData.light':
         return ({positionalArgs, namedArgs, typeArgs}) => ThemeData.light();
       case 'ThemeData.dark':
@@ -225,14 +249,16 @@ class ThemeDataAutoBinding extends HTExternalClass {
       case 'ThemeData.fallback':
         return ({positionalArgs, namedArgs, typeArgs}) => ThemeData.fallback();
       case 'ThemeData.localize':
-        return ({positionalArgs, namedArgs, typeArgs}) => ThemeData.localize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ThemeData.localize(positionalArgs[0], positionalArgs[1]);
       case 'ThemeData.estimateBrightnessForColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => ThemeData.estimateBrightnessForColor(positionalArgs[0]);
-      case 'ThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ThemeData.estimateBrightnessForColor(positionalArgs[0]);
+      case 'ThemeData.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => ThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -246,7 +272,7 @@ extension ThemeDataBinding on ThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ThemeData');
+        return const HTType('ThemeData');
       case 'visualDensity':
         return visualDensity;
       case 'primaryColor':
@@ -399,50 +425,77 @@ extension ThemeDataBinding on ThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            visualDensity: namedArgs.containsKey('visualDensity') ? namedArgs['visualDensity'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
-            primaryColorBrightness:
-                namedArgs.containsKey('primaryColorBrightness') ? namedArgs['primaryColorBrightness'] : null,
-            primaryColorLight: namedArgs.containsKey('primaryColorLight') ? namedArgs['primaryColorLight'] : null,
-            primaryColorDark: namedArgs.containsKey('primaryColorDark') ? namedArgs['primaryColorDark'] : null,
-            accentColor: namedArgs.containsKey('accentColor') ? namedArgs['accentColor'] : null,
-            accentColorBrightness:
-                namedArgs.containsKey('accentColorBrightness') ? namedArgs['accentColorBrightness'] : null,
-            canvasColor: namedArgs.containsKey('canvasColor') ? namedArgs['canvasColor'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            visualDensity: namedArgs.containsKey('visualDensity')
+                ? namedArgs['visualDensity']
+                : null,
+            primaryColor: namedArgs.containsKey('primaryColor')
+                ? namedArgs['primaryColor']
+                : null,
+            primaryColorBrightness: namedArgs.containsKey('primaryColorBrightness')
+                ? namedArgs['primaryColorBrightness']
+                : null,
+            primaryColorLight: namedArgs.containsKey('primaryColorLight')
+                ? namedArgs['primaryColorLight']
+                : null,
+            primaryColorDark: namedArgs.containsKey('primaryColorDark')
+                ? namedArgs['primaryColorDark']
+                : null,
+            accentColor: namedArgs.containsKey('accentColor')
+                ? namedArgs['accentColor']
+                : null,
+            accentColorBrightness: namedArgs.containsKey('accentColorBrightness')
+                ? namedArgs['accentColorBrightness']
+                : null,
+            canvasColor: namedArgs.containsKey('canvasColor')
+                ? namedArgs['canvasColor']
+                : null,
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null,
             scaffoldBackgroundColor:
-                namedArgs.containsKey('scaffoldBackgroundColor') ? namedArgs['scaffoldBackgroundColor'] : null,
-            bottomAppBarColor: namedArgs.containsKey('bottomAppBarColor') ? namedArgs['bottomAppBarColor'] : null,
-            cardColor: namedArgs.containsKey('cardColor') ? namedArgs['cardColor'] : null,
-            dividerColor: namedArgs.containsKey('dividerColor') ? namedArgs['dividerColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
+                namedArgs.containsKey('scaffoldBackgroundColor')
+                    ? namedArgs['scaffoldBackgroundColor']
+                    : null,
+            bottomAppBarColor: namedArgs.containsKey('bottomAppBarColor')
+                ? namedArgs['bottomAppBarColor']
+                : null,
+            cardColor: namedArgs.containsKey('cardColor')
+                ? namedArgs['cardColor']
+                : null,
+            dividerColor: namedArgs.containsKey('dividerColor')
+                ? namedArgs['dividerColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
             splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
             splashFactory: namedArgs.containsKey('splashFactory') ? namedArgs['splashFactory'] : null,
             selectedRowColor: namedArgs.containsKey('selectedRowColor') ? namedArgs['selectedRowColor'] : null,
-            unselectedWidgetColor:
-                namedArgs.containsKey('unselectedWidgetColor') ? namedArgs['unselectedWidgetColor'] : null,
+            unselectedWidgetColor: namedArgs.containsKey('unselectedWidgetColor') ? namedArgs['unselectedWidgetColor'] : null,
             disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
             buttonTheme: namedArgs.containsKey('buttonTheme') ? namedArgs['buttonTheme'] : null,
             toggleButtonsTheme: namedArgs.containsKey('toggleButtonsTheme') ? namedArgs['toggleButtonsTheme'] : null,
             buttonColor: namedArgs.containsKey('buttonColor') ? namedArgs['buttonColor'] : null,
-            secondaryHeaderColor:
-                namedArgs.containsKey('secondaryHeaderColor') ? namedArgs['secondaryHeaderColor'] : null,
+            secondaryHeaderColor: namedArgs.containsKey('secondaryHeaderColor') ? namedArgs['secondaryHeaderColor'] : null,
             backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            dialogBackgroundColor:
-                namedArgs.containsKey('dialogBackgroundColor') ? namedArgs['dialogBackgroundColor'] : null,
+            dialogBackgroundColor: namedArgs.containsKey('dialogBackgroundColor') ? namedArgs['dialogBackgroundColor'] : null,
             indicatorColor: namedArgs.containsKey('indicatorColor') ? namedArgs['indicatorColor'] : null,
             hintColor: namedArgs.containsKey('hintColor') ? namedArgs['hintColor'] : null,
             errorColor: namedArgs.containsKey('errorColor') ? namedArgs['errorColor'] : null,
-            toggleableActiveColor:
-                namedArgs.containsKey('toggleableActiveColor') ? namedArgs['toggleableActiveColor'] : null,
+            toggleableActiveColor: namedArgs.containsKey('toggleableActiveColor') ? namedArgs['toggleableActiveColor'] : null,
             textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
             primaryTextTheme: namedArgs.containsKey('primaryTextTheme') ? namedArgs['primaryTextTheme'] : null,
             accentTextTheme: namedArgs.containsKey('accentTextTheme') ? namedArgs['accentTextTheme'] : null,
-            inputDecorationTheme:
-                namedArgs.containsKey('inputDecorationTheme') ? namedArgs['inputDecorationTheme'] : null,
+            inputDecorationTheme: namedArgs.containsKey('inputDecorationTheme') ? namedArgs['inputDecorationTheme'] : null,
             iconTheme: namedArgs.containsKey('iconTheme') ? namedArgs['iconTheme'] : null,
             primaryIconTheme: namedArgs.containsKey('primaryIconTheme') ? namedArgs['primaryIconTheme'] : null,
             accentIconTheme: namedArgs.containsKey('accentIconTheme') ? namedArgs['accentIconTheme'] : null,
@@ -452,31 +505,25 @@ extension ThemeDataBinding on ThemeData {
             cardTheme: namedArgs.containsKey('cardTheme') ? namedArgs['cardTheme'] : null,
             chipTheme: namedArgs.containsKey('chipTheme') ? namedArgs['chipTheme'] : null,
             platform: namedArgs.containsKey('platform') ? namedArgs['platform'] : null,
-            materialTapTargetSize:
-                namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
-            applyElevationOverlayColor:
-                namedArgs.containsKey('applyElevationOverlayColor') ? namedArgs['applyElevationOverlayColor'] : null,
-            pageTransitionsTheme:
-                namedArgs.containsKey('pageTransitionsTheme') ? namedArgs['pageTransitionsTheme'] : null,
+            materialTapTargetSize: namedArgs.containsKey('materialTapTargetSize') ? namedArgs['materialTapTargetSize'] : null,
+            applyElevationOverlayColor: namedArgs.containsKey('applyElevationOverlayColor') ? namedArgs['applyElevationOverlayColor'] : null,
+            pageTransitionsTheme: namedArgs.containsKey('pageTransitionsTheme') ? namedArgs['pageTransitionsTheme'] : null,
             appBarTheme: namedArgs.containsKey('appBarTheme') ? namedArgs['appBarTheme'] : null,
             scrollbarTheme: namedArgs.containsKey('scrollbarTheme') ? namedArgs['scrollbarTheme'] : null,
             bottomAppBarTheme: namedArgs.containsKey('bottomAppBarTheme') ? namedArgs['bottomAppBarTheme'] : null,
             colorScheme: namedArgs.containsKey('colorScheme') ? namedArgs['colorScheme'] : null,
             dialogTheme: namedArgs.containsKey('dialogTheme') ? namedArgs['dialogTheme'] : null,
-            floatingActionButtonTheme:
-                namedArgs.containsKey('floatingActionButtonTheme') ? namedArgs['floatingActionButtonTheme'] : null,
+            floatingActionButtonTheme: namedArgs.containsKey('floatingActionButtonTheme') ? namedArgs['floatingActionButtonTheme'] : null,
             navigationRailTheme: namedArgs.containsKey('navigationRailTheme') ? namedArgs['navigationRailTheme'] : null,
             typography: namedArgs.containsKey('typography') ? namedArgs['typography'] : null,
-            cupertinoOverrideTheme:
-                namedArgs.containsKey('cupertinoOverrideTheme') ? namedArgs['cupertinoOverrideTheme'] : null,
+            cupertinoOverrideTheme: namedArgs.containsKey('cupertinoOverrideTheme') ? namedArgs['cupertinoOverrideTheme'] : null,
             snackBarTheme: namedArgs.containsKey('snackBarTheme') ? namedArgs['snackBarTheme'] : null,
             bottomSheetTheme: namedArgs.containsKey('bottomSheetTheme') ? namedArgs['bottomSheetTheme'] : null,
             popupMenuTheme: namedArgs.containsKey('popupMenuTheme') ? namedArgs['popupMenuTheme'] : null,
             bannerTheme: namedArgs.containsKey('bannerTheme') ? namedArgs['bannerTheme'] : null,
             dividerTheme: namedArgs.containsKey('dividerTheme') ? namedArgs['dividerTheme'] : null,
             buttonBarTheme: namedArgs.containsKey('buttonBarTheme') ? namedArgs['buttonBarTheme'] : null,
-            bottomNavigationBarTheme:
-                namedArgs.containsKey('bottomNavigationBarTheme') ? namedArgs['bottomNavigationBarTheme'] : null,
+            bottomNavigationBarTheme: namedArgs.containsKey('bottomNavigationBarTheme') ? namedArgs['bottomNavigationBarTheme'] : null,
             timePickerTheme: namedArgs.containsKey('timePickerTheme') ? namedArgs['timePickerTheme'] : null,
             textButtonTheme: namedArgs.containsKey('textButtonTheme') ? namedArgs['textButtonTheme'] : null,
             elevatedButtonTheme: namedArgs.containsKey('elevatedButtonTheme') ? namedArgs['elevatedButtonTheme'] : null,
@@ -486,36 +533,40 @@ extension ThemeDataBinding on ThemeData {
             checkboxTheme: namedArgs.containsKey('checkboxTheme') ? namedArgs['checkboxTheme'] : null,
             radioTheme: namedArgs.containsKey('radioTheme') ? namedArgs['radioTheme'] : null,
             switchTheme: namedArgs.containsKey('switchTheme') ? namedArgs['switchTheme'] : null,
-            fixTextFieldOutlineLabel:
-                namedArgs.containsKey('fixTextFieldOutlineLabel') ? namedArgs['fixTextFieldOutlineLabel'] : null);
+            fixTextFieldOutlineLabel: namedArgs.containsKey('fixTextFieldOutlineLabel') ? namedArgs['fixTextFieldOutlineLabel'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class MaterialBasedCupertinoThemeDataAutoBinding extends HTExternalClass {
-  MaterialBasedCupertinoThemeDataAutoBinding() : super('MaterialBasedCupertinoThemeData');
+  MaterialBasedCupertinoThemeDataAutoBinding()
+      : super('MaterialBasedCupertinoThemeData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaterialBasedCupertinoThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            MaterialBasedCupertinoThemeData(materialTheme: namedArgs['materialTheme']);
+            MaterialBasedCupertinoThemeData(
+                materialTheme: namedArgs['materialTheme']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -525,11 +576,12 @@ class MaterialBasedCupertinoThemeDataAutoBinding extends HTExternalClass {
   }
 }
 
-extension MaterialBasedCupertinoThemeDataBinding on MaterialBasedCupertinoThemeData {
+extension MaterialBasedCupertinoThemeDataBinding
+    on MaterialBasedCupertinoThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaterialBasedCupertinoThemeData');
+        return const HTType('MaterialBasedCupertinoThemeData');
       case 'brightness':
         return brightness;
       case 'primaryColor':
@@ -544,31 +596,47 @@ extension MaterialBasedCupertinoThemeDataBinding on MaterialBasedCupertinoThemeD
         return barBackgroundColor;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            brightness: namedArgs.containsKey('brightness') ? namedArgs['brightness'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null,
+            brightness: namedArgs.containsKey('brightness')
+                ? namedArgs['brightness']
+                : null,
+            primaryColor: namedArgs.containsKey('primaryColor')
+                ? namedArgs['primaryColor']
+                : null,
             primaryContrastingColor:
-                namedArgs.containsKey('primaryContrastingColor') ? namedArgs['primaryContrastingColor'] : null,
-            textTheme: namedArgs.containsKey('textTheme') ? namedArgs['textTheme'] : null,
-            barBackgroundColor: namedArgs.containsKey('barBackgroundColor') ? namedArgs['barBackgroundColor'] : null,
+                namedArgs.containsKey('primaryContrastingColor')
+                    ? namedArgs['primaryContrastingColor']
+                    : null,
+            textTheme: namedArgs.containsKey('textTheme')
+                ? namedArgs['textTheme']
+                : null,
+            barBackgroundColor: namedArgs.containsKey('barBackgroundColor')
+                ? namedArgs['barBackgroundColor']
+                : null,
             scaffoldBackgroundColor:
-                namedArgs.containsKey('scaffoldBackgroundColor') ? namedArgs['scaffoldBackgroundColor'] : null);
+                namedArgs.containsKey('scaffoldBackgroundColor')
+                    ? namedArgs['scaffoldBackgroundColor']
+                    : null);
       case 'resolveFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolveFrom(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolveFrom(positionalArgs[0]);
       case 'noDefault':
         return ({positionalArgs, namedArgs, typeArgs}) => noDefault();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -581,11 +649,15 @@ class VisualDensityAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'VisualDensity':
         return ({positionalArgs, namedArgs, typeArgs}) => VisualDensity(
-            horizontal: namedArgs.containsKey('horizontal') ? namedArgs['horizontal'] : 0.0,
-            vertical: namedArgs.containsKey('vertical') ? namedArgs['vertical'] : 0.0);
+            horizontal: namedArgs.containsKey('horizontal')
+                ? namedArgs['horizontal']
+                : 0.0,
+            vertical: namedArgs.containsKey('vertical')
+                ? namedArgs['vertical']
+                : 0.0);
       case 'VisualDensity.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            VisualDensity.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => VisualDensity.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'VisualDensity.adaptivePlatformDensity':
         return VisualDensity.adaptivePlatformDensity;
       case 'VisualDensity.minimumDensity':
@@ -599,7 +671,7 @@ class VisualDensityAutoBinding extends HTExternalClass {
       case 'VisualDensity.compact':
         return VisualDensity.compact;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -613,7 +685,7 @@ extension VisualDensityBinding on VisualDensity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VisualDensity');
+        return const HTType('VisualDensity');
       case 'horizontal':
         return horizontal;
       case 'vertical':
@@ -624,23 +696,31 @@ extension VisualDensityBinding on VisualDensity {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            horizontal: namedArgs.containsKey('horizontal') ? namedArgs['horizontal'] : null,
-            vertical: namedArgs.containsKey('vertical') ? namedArgs['vertical'] : null);
+            horizontal: namedArgs.containsKey('horizontal')
+                ? namedArgs['horizontal']
+                : null,
+            vertical: namedArgs.containsKey('vertical')
+                ? namedArgs['vertical']
+                : null);
       case 'effectiveConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => effectiveConstraints(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            effectiveConstraints(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/time.g.dart b/lib/bindings/flutter/material/time.g.dart
index e091d6b..b2f35cd 100644
--- a/lib/bindings/flutter/material/time.g.dart
+++ b/lib/bindings/flutter/material/time.g.dart
@@ -14,7 +14,7 @@ class DayPeriodAutoBinding extends HTExternalClass {
       case 'DayPeriod.pm':
         return DayPeriod.pm;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class DayPeriodAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DayPeriod');
+        return const HTType('DayPeriod');
       case 'index':
         return (instance as DayPeriod).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DayPeriod).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DayPeriod).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,7 +55,7 @@ class TimeOfDayFormatAutoBinding extends HTExternalClass {
       case 'TimeOfDayFormat.a_space_h_colon_mm':
         return TimeOfDayFormat.a_space_h_colon_mm;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,13 +63,14 @@ class TimeOfDayFormatAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TimeOfDayFormat');
+        return const HTType('TimeOfDayFormat');
       case 'index':
         return (instance as TimeOfDayFormat).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TimeOfDayFormat).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TimeOfDayFormat).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -88,7 +90,7 @@ class HourFormatAutoBinding extends HTExternalClass {
       case 'HourFormat.h':
         return HourFormat.h;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -96,13 +98,14 @@ class HourFormatAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HourFormat');
+        return const HTType('HourFormat');
       case 'index':
         return (instance as HourFormat).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as HourFormat).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as HourFormat).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -117,7 +120,8 @@ class TimeOfDayAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             TimeOfDay(hour: namedArgs['hour'], minute: namedArgs['minute']);
       case 'TimeOfDay.fromDateTime':
-        return ({positionalArgs, namedArgs, typeArgs}) => TimeOfDay.fromDateTime(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TimeOfDay.fromDateTime(positionalArgs[0]);
       case 'TimeOfDay.now':
         return ({positionalArgs, namedArgs, typeArgs}) => TimeOfDay.now();
       case 'TimeOfDay.hoursPerDay':
@@ -127,7 +131,7 @@ class TimeOfDayAutoBinding extends HTExternalClass {
       case 'TimeOfDay.minutesPerHour':
         return TimeOfDay.minutesPerHour;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -141,7 +145,7 @@ extension TimeOfDayBinding on TimeOfDay {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TimeOfDay');
+        return const HTType('TimeOfDay');
       case 'hour':
         return hour;
       case 'minute':
@@ -157,13 +161,15 @@ extension TimeOfDayBinding on TimeOfDay {
       case 'replacing':
         return ({positionalArgs, namedArgs, typeArgs}) => replacing(
             hour: namedArgs.containsKey('hour') ? namedArgs['hour'] : null,
-            minute: namedArgs.containsKey('minute') ? namedArgs['minute'] : null);
+            minute:
+                namedArgs.containsKey('minute') ? namedArgs['minute'] : null);
       case 'format':
-        return ({positionalArgs, namedArgs, typeArgs}) => format(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            format(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/time_picker.g.dart b/lib/bindings/flutter/material/time_picker.g.dart
index 492abf9..31847b4 100644
--- a/lib/bindings/flutter/material/time_picker.g.dart
+++ b/lib/bindings/flutter/material/time_picker.g.dart
@@ -14,7 +14,7 @@ class TimePickerEntryModeAutoBinding extends HTExternalClass {
       case 'TimePickerEntryMode.input':
         return TimePickerEntryMode.input;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class TimePickerEntryModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TimePickerEntryMode');
+        return const HTType('TimePickerEntryMode');
       case 'index':
         return (instance as TimePickerEntryMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TimePickerEntryMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TimePickerEntryMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/time_picker_theme.g.dart b/lib/bindings/flutter/material/time_picker_theme.g.dart
index 28ebc49..5169503 100644
--- a/lib/bindings/flutter/material/time_picker_theme.g.dart
+++ b/lib/bindings/flutter/material/time_picker_theme.g.dart
@@ -11,29 +11,61 @@ class TimePickerThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TimePickerThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => TimePickerThemeData(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            hourMinuteTextColor: namedArgs.containsKey('hourMinuteTextColor') ? namedArgs['hourMinuteTextColor'] : null,
-            hourMinuteColor: namedArgs.containsKey('hourMinuteColor') ? namedArgs['hourMinuteColor'] : null,
-            dayPeriodTextColor: namedArgs.containsKey('dayPeriodTextColor') ? namedArgs['dayPeriodTextColor'] : null,
-            dayPeriodColor: namedArgs.containsKey('dayPeriodColor') ? namedArgs['dayPeriodColor'] : null,
-            dialHandColor: namedArgs.containsKey('dialHandColor') ? namedArgs['dialHandColor'] : null,
-            dialBackgroundColor: namedArgs.containsKey('dialBackgroundColor') ? namedArgs['dialBackgroundColor'] : null,
-            dialTextColor: namedArgs.containsKey('dialTextColor') ? namedArgs['dialTextColor'] : null,
-            entryModeIconColor: namedArgs.containsKey('entryModeIconColor') ? namedArgs['entryModeIconColor'] : null,
-            hourMinuteTextStyle: namedArgs.containsKey('hourMinuteTextStyle') ? namedArgs['hourMinuteTextStyle'] : null,
-            dayPeriodTextStyle: namedArgs.containsKey('dayPeriodTextStyle') ? namedArgs['dayPeriodTextStyle'] : null,
-            helpTextStyle: namedArgs.containsKey('helpTextStyle') ? namedArgs['helpTextStyle'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            hourMinuteTextColor: namedArgs.containsKey('hourMinuteTextColor')
+                ? namedArgs['hourMinuteTextColor']
+                : null,
+            hourMinuteColor: namedArgs.containsKey('hourMinuteColor')
+                ? namedArgs['hourMinuteColor']
+                : null,
+            dayPeriodTextColor: namedArgs.containsKey('dayPeriodTextColor')
+                ? namedArgs['dayPeriodTextColor']
+                : null,
+            dayPeriodColor: namedArgs.containsKey('dayPeriodColor')
+                ? namedArgs['dayPeriodColor']
+                : null,
+            dialHandColor: namedArgs.containsKey('dialHandColor')
+                ? namedArgs['dialHandColor']
+                : null,
+            dialBackgroundColor: namedArgs.containsKey('dialBackgroundColor')
+                ? namedArgs['dialBackgroundColor']
+                : null,
+            dialTextColor: namedArgs.containsKey('dialTextColor')
+                ? namedArgs['dialTextColor']
+                : null,
+            entryModeIconColor: namedArgs.containsKey('entryModeIconColor')
+                ? namedArgs['entryModeIconColor']
+                : null,
+            hourMinuteTextStyle: namedArgs.containsKey('hourMinuteTextStyle')
+                ? namedArgs['hourMinuteTextStyle']
+                : null,
+            dayPeriodTextStyle: namedArgs.containsKey('dayPeriodTextStyle')
+                ? namedArgs['dayPeriodTextStyle']
+                : null,
+            helpTextStyle: namedArgs.containsKey('helpTextStyle')
+                ? namedArgs['helpTextStyle']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            hourMinuteShape: namedArgs.containsKey('hourMinuteShape') ? namedArgs['hourMinuteShape'] : null,
-            dayPeriodShape: namedArgs.containsKey('dayPeriodShape') ? namedArgs['dayPeriodShape'] : null,
-            dayPeriodBorderSide: namedArgs.containsKey('dayPeriodBorderSide') ? namedArgs['dayPeriodBorderSide'] : null,
-            inputDecorationTheme:
-                namedArgs.containsKey('inputDecorationTheme') ? namedArgs['inputDecorationTheme'] : null);
+            hourMinuteShape: namedArgs.containsKey('hourMinuteShape')
+                ? namedArgs['hourMinuteShape']
+                : null,
+            dayPeriodShape: namedArgs.containsKey('dayPeriodShape')
+                ? namedArgs['dayPeriodShape']
+                : null,
+            dayPeriodBorderSide: namedArgs.containsKey('dayPeriodBorderSide')
+                ? namedArgs['dayPeriodBorderSide']
+                : null,
+            inputDecorationTheme: namedArgs.containsKey('inputDecorationTheme')
+                ? namedArgs['inputDecorationTheme']
+                : null);
       case 'TimePickerThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TimePickerThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            TimePickerThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -47,7 +79,7 @@ extension TimePickerThemeDataBinding on TimePickerThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TimePickerThemeData');
+        return const HTType('TimePickerThemeData');
       case 'backgroundColor':
         return backgroundColor;
       case 'hourMinuteTextColor':
@@ -86,37 +118,71 @@ extension TimePickerThemeDataBinding on TimePickerThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            hourMinuteTextColor: namedArgs.containsKey('hourMinuteTextColor') ? namedArgs['hourMinuteTextColor'] : null,
-            hourMinuteColor: namedArgs.containsKey('hourMinuteColor') ? namedArgs['hourMinuteColor'] : null,
-            dayPeriodTextColor: namedArgs.containsKey('dayPeriodTextColor') ? namedArgs['dayPeriodTextColor'] : null,
-            dayPeriodColor: namedArgs.containsKey('dayPeriodColor') ? namedArgs['dayPeriodColor'] : null,
-            dialHandColor: namedArgs.containsKey('dialHandColor') ? namedArgs['dialHandColor'] : null,
-            dialBackgroundColor: namedArgs.containsKey('dialBackgroundColor') ? namedArgs['dialBackgroundColor'] : null,
-            dialTextColor: namedArgs.containsKey('dialTextColor') ? namedArgs['dialTextColor'] : null,
-            entryModeIconColor: namedArgs.containsKey('entryModeIconColor') ? namedArgs['entryModeIconColor'] : null,
-            hourMinuteTextStyle: namedArgs.containsKey('hourMinuteTextStyle') ? namedArgs['hourMinuteTextStyle'] : null,
-            dayPeriodTextStyle: namedArgs.containsKey('dayPeriodTextStyle') ? namedArgs['dayPeriodTextStyle'] : null,
-            helpTextStyle: namedArgs.containsKey('helpTextStyle') ? namedArgs['helpTextStyle'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            hourMinuteTextColor: namedArgs.containsKey('hourMinuteTextColor')
+                ? namedArgs['hourMinuteTextColor']
+                : null,
+            hourMinuteColor: namedArgs.containsKey('hourMinuteColor')
+                ? namedArgs['hourMinuteColor']
+                : null,
+            dayPeriodTextColor: namedArgs.containsKey('dayPeriodTextColor')
+                ? namedArgs['dayPeriodTextColor']
+                : null,
+            dayPeriodColor: namedArgs.containsKey('dayPeriodColor')
+                ? namedArgs['dayPeriodColor']
+                : null,
+            dialHandColor: namedArgs.containsKey('dialHandColor')
+                ? namedArgs['dialHandColor']
+                : null,
+            dialBackgroundColor: namedArgs.containsKey('dialBackgroundColor')
+                ? namedArgs['dialBackgroundColor']
+                : null,
+            dialTextColor: namedArgs.containsKey('dialTextColor')
+                ? namedArgs['dialTextColor']
+                : null,
+            entryModeIconColor: namedArgs.containsKey('entryModeIconColor')
+                ? namedArgs['entryModeIconColor']
+                : null,
+            hourMinuteTextStyle: namedArgs.containsKey('hourMinuteTextStyle')
+                ? namedArgs['hourMinuteTextStyle']
+                : null,
+            dayPeriodTextStyle: namedArgs.containsKey('dayPeriodTextStyle')
+                ? namedArgs['dayPeriodTextStyle']
+                : null,
+            helpTextStyle: namedArgs.containsKey('helpTextStyle')
+                ? namedArgs['helpTextStyle']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            hourMinuteShape: namedArgs.containsKey('hourMinuteShape') ? namedArgs['hourMinuteShape'] : null,
-            dayPeriodShape: namedArgs.containsKey('dayPeriodShape') ? namedArgs['dayPeriodShape'] : null,
-            dayPeriodBorderSide: namedArgs.containsKey('dayPeriodBorderSide') ? namedArgs['dayPeriodBorderSide'] : null,
-            inputDecorationTheme:
-                namedArgs.containsKey('inputDecorationTheme') ? namedArgs['inputDecorationTheme'] : null);
+            hourMinuteShape: namedArgs.containsKey('hourMinuteShape')
+                ? namedArgs['hourMinuteShape']
+                : null,
+            dayPeriodShape: namedArgs.containsKey('dayPeriodShape')
+                ? namedArgs['dayPeriodShape']
+                : null,
+            dayPeriodBorderSide: namedArgs.containsKey('dayPeriodBorderSide')
+                ? namedArgs['dayPeriodBorderSide']
+                : null,
+            inputDecorationTheme: namedArgs.containsKey('inputDecorationTheme')
+                ? namedArgs['inputDecorationTheme']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -133,9 +199,10 @@ class TimePickerThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'TimePickerTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => TimePickerTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TimePickerTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -149,7 +216,7 @@ extension TimePickerThemeBinding on TimePickerTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TimePickerTheme');
+        return const HTType('TimePickerTheme');
       case 'data':
         return data;
       case 'child':
@@ -159,33 +226,47 @@ extension TimePickerThemeBinding on TimePickerTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/toggle_buttons.g.dart b/lib/bindings/flutter/material/toggle_buttons.g.dart
index 4e99b50..479ab92 100644
--- a/lib/bindings/flutter/material/toggle_buttons.g.dart
+++ b/lib/bindings/flutter/material/toggle_buttons.g.dart
@@ -14,31 +14,70 @@ class ToggleButtonsAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ToggleButtons(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             isSelected: List<bool>.from(namedArgs['isSelected']),
-            onPressed: namedArgs.containsKey('onPressed') ? namedArgs['onPressed'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            constraints: namedArgs.containsKey('constraints') ? namedArgs['constraints'] : null,
+            onPressed: namedArgs.containsKey('onPressed')
+                ? namedArgs['onPressed']
+                : null,
+            mouseCursor: namedArgs.containsKey('mouseCursor')
+                ? namedArgs['mouseCursor']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            constraints: namedArgs.containsKey('constraints')
+                ? namedArgs['constraints']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            focusNodes: namedArgs.containsKey('focusNodes') ? List<FocusNode>.from(namedArgs['focusNodes']) : null,
-            renderBorder: namedArgs.containsKey('renderBorder') ? namedArgs['renderBorder'] : true,
-            borderColor: namedArgs.containsKey('borderColor') ? namedArgs['borderColor'] : null,
-            selectedBorderColor: namedArgs.containsKey('selectedBorderColor') ? namedArgs['selectedBorderColor'] : null,
-            disabledBorderColor: namedArgs.containsKey('disabledBorderColor') ? namedArgs['disabledBorderColor'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            borderWidth: namedArgs.containsKey('borderWidth') ? namedArgs['borderWidth'] : null,
-            direction: namedArgs.containsKey('direction') ? namedArgs['direction'] : Axis.horizontal,
-            verticalDirection:
-                namedArgs.containsKey('verticalDirection') ? namedArgs['verticalDirection'] : VerticalDirection.down,
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            focusNodes: namedArgs.containsKey('focusNodes')
+                ? List<FocusNode>.from(namedArgs['focusNodes'])
+                : null,
+            renderBorder: namedArgs.containsKey('renderBorder')
+                ? namedArgs['renderBorder']
+                : true,
+            borderColor: namedArgs.containsKey('borderColor')
+                ? namedArgs['borderColor']
+                : null,
+            selectedBorderColor: namedArgs.containsKey('selectedBorderColor')
+                ? namedArgs['selectedBorderColor']
+                : null,
+            disabledBorderColor: namedArgs.containsKey('disabledBorderColor')
+                ? namedArgs['disabledBorderColor']
+                : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            borderWidth: namedArgs.containsKey('borderWidth')
+                ? namedArgs['borderWidth']
+                : null,
+            direction: namedArgs.containsKey('direction')
+                ? namedArgs['direction']
+                : Axis.horizontal,
+            verticalDirection: namedArgs.containsKey('verticalDirection')
+                ? namedArgs['verticalDirection']
+                : VerticalDirection.down,
             children: List<Widget>.from(namedArgs['children']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -52,7 +91,7 @@ extension ToggleButtonsBinding on ToggleButtons {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ToggleButtons');
+        return const HTType('ToggleButtons');
       case 'children':
         return children;
       case 'isSelected':
@@ -104,31 +143,44 @@ extension ToggleButtonsBinding on ToggleButtons {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/toggle_buttons_theme.g.dart b/lib/bindings/flutter/material/toggle_buttons_theme.g.dart
index d36de56..f4ca52b 100644
--- a/lib/bindings/flutter/material/toggle_buttons_theme.g.dart
+++ b/lib/bindings/flutter/material/toggle_buttons_theme.g.dart
@@ -11,27 +11,60 @@ class ToggleButtonsThemeDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ToggleButtonsThemeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => ToggleButtonsThemeData(
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            constraints: namedArgs.containsKey('constraints') ? namedArgs['constraints'] : null,
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            borderColor: namedArgs.containsKey('borderColor') ? namedArgs['borderColor'] : null,
-            selectedBorderColor: namedArgs.containsKey('selectedBorderColor') ? namedArgs['selectedBorderColor'] : null,
-            disabledBorderColor: namedArgs.containsKey('disabledBorderColor') ? namedArgs['disabledBorderColor'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            borderWidth: namedArgs.containsKey('borderWidth') ? namedArgs['borderWidth'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ToggleButtonsThemeData(
+                textStyle: namedArgs.containsKey('textStyle')
+                    ? namedArgs['textStyle']
+                    : null,
+                constraints: namedArgs.containsKey('constraints')
+                    ? namedArgs['constraints']
+                    : null,
+                color:
+                    namedArgs.containsKey('color') ? namedArgs['color'] : null,
+                selectedColor: namedArgs.containsKey('selectedColor')
+                    ? namedArgs['selectedColor']
+                    : null,
+                disabledColor: namedArgs.containsKey('disabledColor')
+                    ? namedArgs['disabledColor']
+                    : null,
+                fillColor: namedArgs.containsKey('fillColor')
+                    ? namedArgs['fillColor']
+                    : null,
+                focusColor: namedArgs.containsKey('focusColor')
+                    ? namedArgs['focusColor']
+                    : null,
+                highlightColor: namedArgs.containsKey('highlightColor')
+                    ? namedArgs['highlightColor']
+                    : null,
+                hoverColor: namedArgs.containsKey('hoverColor')
+                    ? namedArgs['hoverColor']
+                    : null,
+                splashColor: namedArgs.containsKey('splashColor')
+                    ? namedArgs['splashColor']
+                    : null,
+                borderColor: namedArgs.containsKey('borderColor')
+                    ? namedArgs['borderColor']
+                    : null,
+                selectedBorderColor:
+                    namedArgs.containsKey('selectedBorderColor')
+                        ? namedArgs['selectedBorderColor']
+                        : null,
+                disabledBorderColor:
+                    namedArgs.containsKey('disabledBorderColor')
+                        ? namedArgs['disabledBorderColor']
+                        : null,
+                borderRadius: namedArgs.containsKey('borderRadius')
+                    ? namedArgs['borderRadius']
+                    : null,
+                borderWidth: namedArgs.containsKey('borderWidth')
+                    ? namedArgs['borderWidth']
+                    : null);
       case 'ToggleButtonsThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ToggleButtonsThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ToggleButtonsThemeData.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,7 +78,7 @@ extension ToggleButtonsThemeDataBinding on ToggleButtonsThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ToggleButtonsThemeData');
+        return const HTType('ToggleButtonsThemeData');
       case 'textStyle':
         return textStyle;
       case 'constraints':
@@ -80,34 +113,65 @@ extension ToggleButtonsThemeDataBinding on ToggleButtonsThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            constraints: namedArgs.containsKey('constraints') ? namedArgs['constraints'] : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            constraints: namedArgs.containsKey('constraints')
+                ? namedArgs['constraints']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            selectedColor: namedArgs.containsKey('selectedColor') ? namedArgs['selectedColor'] : null,
-            disabledColor: namedArgs.containsKey('disabledColor') ? namedArgs['disabledColor'] : null,
-            fillColor: namedArgs.containsKey('fillColor') ? namedArgs['fillColor'] : null,
-            focusColor: namedArgs.containsKey('focusColor') ? namedArgs['focusColor'] : null,
-            highlightColor: namedArgs.containsKey('highlightColor') ? namedArgs['highlightColor'] : null,
-            hoverColor: namedArgs.containsKey('hoverColor') ? namedArgs['hoverColor'] : null,
-            splashColor: namedArgs.containsKey('splashColor') ? namedArgs['splashColor'] : null,
-            borderColor: namedArgs.containsKey('borderColor') ? namedArgs['borderColor'] : null,
-            selectedBorderColor: namedArgs.containsKey('selectedBorderColor') ? namedArgs['selectedBorderColor'] : null,
-            disabledBorderColor: namedArgs.containsKey('disabledBorderColor') ? namedArgs['disabledBorderColor'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            borderWidth: namedArgs.containsKey('borderWidth') ? namedArgs['borderWidth'] : null);
+            selectedColor: namedArgs.containsKey('selectedColor')
+                ? namedArgs['selectedColor']
+                : null,
+            disabledColor: namedArgs.containsKey('disabledColor')
+                ? namedArgs['disabledColor']
+                : null,
+            fillColor: namedArgs.containsKey('fillColor')
+                ? namedArgs['fillColor']
+                : null,
+            focusColor: namedArgs.containsKey('focusColor')
+                ? namedArgs['focusColor']
+                : null,
+            highlightColor: namedArgs.containsKey('highlightColor')
+                ? namedArgs['highlightColor']
+                : null,
+            hoverColor: namedArgs.containsKey('hoverColor')
+                ? namedArgs['hoverColor']
+                : null,
+            splashColor: namedArgs.containsKey('splashColor')
+                ? namedArgs['splashColor']
+                : null,
+            borderColor: namedArgs.containsKey('borderColor')
+                ? namedArgs['borderColor']
+                : null,
+            selectedBorderColor: namedArgs.containsKey('selectedBorderColor')
+                ? namedArgs['selectedBorderColor']
+                : null,
+            disabledBorderColor: namedArgs.containsKey('disabledBorderColor')
+                ? namedArgs['disabledBorderColor']
+                : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            borderWidth: namedArgs.containsKey('borderWidth')
+                ? namedArgs['borderWidth']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -124,9 +188,10 @@ class ToggleButtonsThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'ToggleButtonsTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ToggleButtonsTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ToggleButtonsTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -140,7 +205,7 @@ extension ToggleButtonsThemeBinding on ToggleButtonsTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ToggleButtonsTheme');
+        return const HTType('ToggleButtonsTheme');
       case 'data':
         return data;
       case 'child':
@@ -150,33 +215,47 @@ extension ToggleButtonsThemeBinding on ToggleButtonsTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/tooltip.g.dart b/lib/bindings/flutter/material/tooltip.g.dart
index de863f4..9b00b97 100644
--- a/lib/bindings/flutter/material/tooltip.g.dart
+++ b/lib/bindings/flutter/material/tooltip.g.dart
@@ -13,20 +13,36 @@ class TooltipAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Tooltip(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             message: namedArgs['message'],
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
-            verticalOffset: namedArgs.containsKey('verticalOffset') ? namedArgs['verticalOffset'] : null,
-            preferBelow: namedArgs.containsKey('preferBelow') ? namedArgs['preferBelow'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            waitDuration: namedArgs.containsKey('waitDuration') ? namedArgs['waitDuration'] : null,
-            showDuration: namedArgs.containsKey('showDuration') ? namedArgs['showDuration'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            verticalOffset: namedArgs.containsKey('verticalOffset')
+                ? namedArgs['verticalOffset']
+                : null,
+            preferBelow: namedArgs.containsKey('preferBelow')
+                ? namedArgs['preferBelow']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            waitDuration: namedArgs.containsKey('waitDuration')
+                ? namedArgs['waitDuration']
+                : null,
+            showDuration: namedArgs.containsKey('showDuration')
+                ? namedArgs['showDuration']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -40,7 +56,7 @@ extension TooltipBinding on Tooltip {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Tooltip');
+        return const HTType('Tooltip');
       case 'message':
         return message;
       case 'height':
@@ -72,29 +88,41 @@ extension TooltipBinding on Tooltip {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/tooltip_theme.g.dart b/lib/bindings/flutter/material/tooltip_theme.g.dart
index 9842c7d..a6343e4 100644
--- a/lib/bindings/flutter/material/tooltip_theme.g.dart
+++ b/lib/bindings/flutter/material/tooltip_theme.g.dart
@@ -11,22 +11,38 @@ class TooltipThemeDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TooltipThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => TooltipThemeData(
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
-            verticalOffset: namedArgs.containsKey('verticalOffset') ? namedArgs['verticalOffset'] : null,
-            preferBelow: namedArgs.containsKey('preferBelow') ? namedArgs['preferBelow'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            waitDuration: namedArgs.containsKey('waitDuration') ? namedArgs['waitDuration'] : null,
-            showDuration: namedArgs.containsKey('showDuration') ? namedArgs['showDuration'] : null);
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            verticalOffset: namedArgs.containsKey('verticalOffset')
+                ? namedArgs['verticalOffset']
+                : null,
+            preferBelow: namedArgs.containsKey('preferBelow')
+                ? namedArgs['preferBelow']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            waitDuration: namedArgs.containsKey('waitDuration')
+                ? namedArgs['waitDuration']
+                : null,
+            showDuration: namedArgs.containsKey('showDuration')
+                ? namedArgs['showDuration']
+                : null);
       case 'TooltipThemeData.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TooltipThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => TooltipThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -40,7 +56,7 @@ extension TooltipThemeDataBinding on TooltipThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TooltipThemeData');
+        return const HTType('TooltipThemeData');
       case 'height':
         return height;
       case 'padding':
@@ -65,30 +81,49 @@ extension TooltipThemeDataBinding on TooltipThemeData {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
-            verticalOffset: namedArgs.containsKey('verticalOffset') ? namedArgs['verticalOffset'] : null,
-            preferBelow: namedArgs.containsKey('preferBelow') ? namedArgs['preferBelow'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
-            waitDuration: namedArgs.containsKey('waitDuration') ? namedArgs['waitDuration'] : null,
-            showDuration: namedArgs.containsKey('showDuration') ? namedArgs['showDuration'] : null);
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            verticalOffset: namedArgs.containsKey('verticalOffset')
+                ? namedArgs['verticalOffset']
+                : null,
+            preferBelow: namedArgs.containsKey('preferBelow')
+                ? namedArgs['preferBelow']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
+            waitDuration: namedArgs.containsKey('waitDuration')
+                ? namedArgs['waitDuration']
+                : null,
+            showDuration: namedArgs.containsKey('showDuration')
+                ? namedArgs['showDuration']
+                : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -105,9 +140,10 @@ class TooltipThemeAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'TooltipTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => TooltipTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TooltipTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -121,7 +157,7 @@ extension TooltipThemeBinding on TooltipTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TooltipTheme');
+        return const HTType('TooltipTheme');
       case 'data':
         return data;
       case 'child':
@@ -131,33 +167,47 @@ extension TooltipThemeBinding on TooltipTheme {
       case 'hashCode':
         return hashCode;
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/typography.g.dart b/lib/bindings/flutter/material/typography.g.dart
index 51be986..8c5ef33 100644
--- a/lib/bindings/flutter/material/typography.g.dart
+++ b/lib/bindings/flutter/material/typography.g.dart
@@ -17,7 +17,7 @@ class ScriptCategoryAutoBinding extends HTExternalClass {
       case 'ScriptCategory.tall':
         return ScriptCategory.tall;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class ScriptCategoryAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScriptCategory');
+        return const HTType('ScriptCategory');
       case 'index':
         return (instance as ScriptCategory).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ScriptCategory).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ScriptCategory).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -43,24 +44,44 @@ class TypographyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Typography.material2014':
-        return ({positionalArgs, namedArgs, typeArgs}) => Typography.material2014(
-            platform: namedArgs.containsKey('platform') ? namedArgs['platform'] : TargetPlatform.android,
-            black: namedArgs.containsKey('black') ? namedArgs['black'] : null,
-            white: namedArgs.containsKey('white') ? namedArgs['white'] : null,
-            englishLike: namedArgs.containsKey('englishLike') ? namedArgs['englishLike'] : null,
-            dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
-            tall: namedArgs.containsKey('tall') ? namedArgs['tall'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Typography.material2014(
+                platform: namedArgs.containsKey('platform')
+                    ? namedArgs['platform']
+                    : TargetPlatform.android,
+                black: namedArgs.containsKey('black')
+                    ? namedArgs['black']
+                    : null,
+                white:
+                    namedArgs.containsKey('white') ? namedArgs['white'] : null,
+                englishLike: namedArgs
+                        .containsKey('englishLike')
+                    ? namedArgs['englishLike']
+                    : null,
+                dense:
+                    namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
+                tall: namedArgs.containsKey('tall') ? namedArgs['tall'] : null);
       case 'Typography.material2018':
-        return ({positionalArgs, namedArgs, typeArgs}) => Typography.material2018(
-            platform: namedArgs.containsKey('platform') ? namedArgs['platform'] : TargetPlatform.android,
-            black: namedArgs.containsKey('black') ? namedArgs['black'] : null,
-            white: namedArgs.containsKey('white') ? namedArgs['white'] : null,
-            englishLike: namedArgs.containsKey('englishLike') ? namedArgs['englishLike'] : null,
-            dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
-            tall: namedArgs.containsKey('tall') ? namedArgs['tall'] : null);
-      case 'Typography.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Typography.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            Typography.material2018(
+                platform: namedArgs.containsKey('platform')
+                    ? namedArgs['platform']
+                    : TargetPlatform.android,
+                black: namedArgs.containsKey('black')
+                    ? namedArgs['black']
+                    : null,
+                white:
+                    namedArgs.containsKey('white') ? namedArgs['white'] : null,
+                englishLike: namedArgs
+                        .containsKey('englishLike')
+                    ? namedArgs['englishLike']
+                    : null,
+                dense:
+                    namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
+                tall: namedArgs.containsKey('tall') ? namedArgs['tall'] : null);
+      case 'Typography.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => Typography.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'Typography.blackMountainView':
         return Typography.blackMountainView;
       case 'Typography.whiteMountainView':
@@ -94,7 +115,7 @@ class TypographyAutoBinding extends HTExternalClass {
       case 'Typography.tall2018':
         return Typography.tall2018;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -108,7 +129,7 @@ extension TypographyBinding on Typography {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Typography');
+        return const HTType('Typography');
       case 'black':
         return black;
       case 'white':
@@ -122,27 +143,33 @@ extension TypographyBinding on Typography {
       case 'hashCode':
         return hashCode;
       case 'geometryThemeFor':
-        return ({positionalArgs, namedArgs, typeArgs}) => geometryThemeFor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            geometryThemeFor(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             black: namedArgs.containsKey('black') ? namedArgs['black'] : null,
             white: namedArgs.containsKey('white') ? namedArgs['white'] : null,
-            englishLike: namedArgs.containsKey('englishLike') ? namedArgs['englishLike'] : null,
+            englishLike: namedArgs.containsKey('englishLike')
+                ? namedArgs['englishLike']
+                : null,
             dense: namedArgs.containsKey('dense') ? namedArgs['dense'] : null,
             tall: namedArgs.containsKey('tall') ? namedArgs['tall'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/material/user_accounts_drawer_header.g.dart b/lib/bindings/flutter/material/user_accounts_drawer_header.g.dart
index f87e05a..aa443d1 100644
--- a/lib/bindings/flutter/material/user_accounts_drawer_header.g.dart
+++ b/lib/bindings/flutter/material/user_accounts_drawer_header.g.dart
@@ -10,21 +10,39 @@ class UserAccountsDrawerHeaderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'UserAccountsDrawerHeader':
-        return ({positionalArgs, namedArgs, typeArgs}) => UserAccountsDrawerHeader(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : const EdgeInsets.only(bottom: 8.0),
-            currentAccountPicture:
-                namedArgs.containsKey('currentAccountPicture') ? namedArgs['currentAccountPicture'] : null,
-            otherAccountsPictures: namedArgs.containsKey('otherAccountsPictures')
-                ? List<Widget>.from(namedArgs['otherAccountsPictures'])
-                : null,
-            accountName: namedArgs['accountName'],
-            accountEmail: namedArgs['accountEmail'],
-            onDetailsPressed: namedArgs.containsKey('onDetailsPressed') ? namedArgs['onDetailsPressed'] : null,
-            arrowColor: namedArgs.containsKey('arrowColor') ? namedArgs['arrowColor'] : Colors.white);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            UserAccountsDrawerHeader(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                decoration: namedArgs.containsKey('decoration')
+                    ? namedArgs['decoration']
+                    : null,
+                margin:
+                    namedArgs.containsKey(
+                            'margin')
+                        ? namedArgs['margin']
+                        : const EdgeInsets.only(bottom: 8.0),
+                currentAccountPicture:
+                    namedArgs.containsKey(
+                            'currentAccountPicture')
+                        ? namedArgs['currentAccountPicture']
+                        : null,
+                otherAccountsPictures:
+                    namedArgs.containsKey(
+                            'otherAccountsPictures')
+                        ? List<Widget>.from(namedArgs['otherAccountsPictures'])
+                        : null,
+                accountName: namedArgs['accountName'],
+                accountEmail: namedArgs['accountEmail'],
+                onDetailsPressed:
+                    namedArgs
+                            .containsKey('onDetailsPressed')
+                        ? namedArgs['onDetailsPressed']
+                        : null,
+                arrowColor: namedArgs.containsKey('arrowColor')
+                    ? namedArgs['arrowColor']
+                    : Colors.white);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +53,8 @@ class UserAccountsDrawerHeaderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -44,7 +63,7 @@ extension UserAccountsDrawerHeaderBinding on UserAccountsDrawerHeader {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UserAccountsDrawerHeader');
+        return const HTType('UserAccountsDrawerHeader');
       case 'decoration':
         return decoration;
       case 'margin':
@@ -72,25 +91,37 @@ extension UserAccountsDrawerHeaderBinding on UserAccountsDrawerHeader {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/alignment.g.dart b/lib/bindings/flutter/painting/alignment.g.dart
index 01318a4..0a05373 100644
--- a/lib/bindings/flutter/painting/alignment.g.dart
+++ b/lib/bindings/flutter/painting/alignment.g.dart
@@ -8,10 +8,11 @@ class AlignmentAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Alignment':
-        return ({positionalArgs, namedArgs, typeArgs}) => Alignment(positionalArgs[0], positionalArgs[1]);
-      case 'Alignment.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Alignment.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            Alignment(positionalArgs[0], positionalArgs[1]);
+      case 'Alignment.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => Alignment.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'Alignment.topLeft':
         return Alignment.topLeft;
       case 'Alignment.topCenter':
@@ -31,7 +32,7 @@ class AlignmentAutoBinding extends HTExternalClass {
       case 'Alignment.bottomRight':
         return Alignment.bottomRight;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,7 +46,7 @@ extension AlignmentBinding on Alignment {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Alignment');
+        return const HTType('Alignment');
       case 'x':
         return x;
       case 'y':
@@ -53,21 +54,27 @@ extension AlignmentBinding on Alignment {
       case 'hashCode':
         return hashCode;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'alongOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => alongOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            alongOffset(positionalArgs[0]);
       case 'alongSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => alongSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            alongSize(positionalArgs[0]);
       case 'withinRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => withinRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withinRect(positionalArgs[0]);
       case 'inscribe':
-        return ({positionalArgs, namedArgs, typeArgs}) => inscribe(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inscribe(positionalArgs[0], positionalArgs[1]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,10 +86,12 @@ class AlignmentDirectionalAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AlignmentDirectional':
-        return ({positionalArgs, namedArgs, typeArgs}) => AlignmentDirectional(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AlignmentDirectional(positionalArgs[0], positionalArgs[1]);
       case 'AlignmentDirectional.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            AlignmentDirectional.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            AlignmentDirectional.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'AlignmentDirectional.topStart':
         return AlignmentDirectional.topStart;
       case 'AlignmentDirectional.topCenter':
@@ -102,7 +111,7 @@ class AlignmentDirectionalAutoBinding extends HTExternalClass {
       case 'AlignmentDirectional.bottomEnd':
         return AlignmentDirectional.bottomEnd;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -116,7 +125,7 @@ extension AlignmentDirectionalBinding on AlignmentDirectional {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AlignmentDirectional');
+        return const HTType('AlignmentDirectional');
       case 'start':
         return start;
       case 'y':
@@ -124,13 +133,15 @@ extension AlignmentDirectionalBinding on AlignmentDirectional {
       case 'hashCode':
         return hashCode;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -142,7 +153,8 @@ class TextAlignVerticalAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextAlignVertical':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextAlignVertical(y: namedArgs['y']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextAlignVertical(y: namedArgs['y']);
       case 'TextAlignVertical.top':
         return TextAlignVertical.top;
       case 'TextAlignVertical.center':
@@ -150,7 +162,7 @@ class TextAlignVerticalAutoBinding extends HTExternalClass {
       case 'TextAlignVertical.bottom':
         return TextAlignVertical.bottom;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -164,13 +176,13 @@ extension TextAlignVerticalBinding on TextAlignVertical {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextAlignVertical');
+        return const HTType('TextAlignVertical');
       case 'y':
         return y;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/basic_types.g.dart b/lib/bindings/flutter/painting/basic_types.g.dart
index db455c6..7ca1635 100644
--- a/lib/bindings/flutter/painting/basic_types.g.dart
+++ b/lib/bindings/flutter/painting/basic_types.g.dart
@@ -18,7 +18,7 @@ class RenderComparisonAutoBinding extends HTExternalClass {
       case 'RenderComparison.layout':
         return RenderComparison.layout;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class RenderComparisonAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderComparison');
+        return const HTType('RenderComparison');
       case 'index':
         return (instance as RenderComparison).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as RenderComparison).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as RenderComparison).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,7 +51,7 @@ class AxisAutoBinding extends HTExternalClass {
       case 'Axis.vertical':
         return Axis.vertical;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -58,13 +59,14 @@ class AxisAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Axis');
+        return const HTType('Axis');
       case 'index':
         return (instance as Axis).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as Axis).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as Axis).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -82,7 +84,7 @@ class VerticalDirectionAutoBinding extends HTExternalClass {
       case 'VerticalDirection.down':
         return VerticalDirection.down;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -90,13 +92,14 @@ class VerticalDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('VerticalDirection');
+        return const HTType('VerticalDirection');
       case 'index':
         return (instance as VerticalDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as VerticalDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as VerticalDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -118,7 +121,7 @@ class AxisDirectionAutoBinding extends HTExternalClass {
       case 'AxisDirection.left':
         return AxisDirection.left;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -126,13 +129,14 @@ class AxisDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AxisDirection');
+        return const HTType('AxisDirection');
       case 'index':
         return (instance as AxisDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as AxisDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as AxisDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/beveled_rectangle_border.g.dart b/lib/bindings/flutter/painting/beveled_rectangle_border.g.dart
index 2770f79..3dd97db 100644
--- a/lib/bindings/flutter/painting/beveled_rectangle_border.g.dart
+++ b/lib/bindings/flutter/painting/beveled_rectangle_border.g.dart
@@ -8,11 +8,16 @@ class BeveledRectangleBorderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BeveledRectangleBorder':
-        return ({positionalArgs, namedArgs, typeArgs}) => BeveledRectangleBorder(
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : BorderSide.none,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : BorderRadius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BeveledRectangleBorder(
+                side: namedArgs.containsKey('side')
+                    ? namedArgs['side']
+                    : BorderSide.none,
+                borderRadius: namedArgs.containsKey('borderRadius')
+                    ? namedArgs['borderRadius']
+                    : BorderRadius.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +31,7 @@ extension BeveledRectangleBorderBinding on BeveledRectangleBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BeveledRectangleBorder');
+        return const HTType('BeveledRectangleBorder');
       case 'borderRadius':
         return borderRadius;
       case 'side':
@@ -36,28 +41,42 @@ extension BeveledRectangleBorderBinding on BeveledRectangleBorder {
       case 'hashCode':
         return hashCode;
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null);
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null);
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/border_radius.g.dart b/lib/bindings/flutter/painting/border_radius.g.dart
index 197d6f4..8f6f90e 100644
--- a/lib/bindings/flutter/painting/border_radius.g.dart
+++ b/lib/bindings/flutter/painting/border_radius.g.dart
@@ -8,30 +8,47 @@ class BorderRadiusAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BorderRadius.all':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadius.all(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadius.all(positionalArgs[0]);
       case 'BorderRadius.circular':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadius.circular(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadius.circular(positionalArgs[0]);
       case 'BorderRadius.vertical':
         return ({positionalArgs, namedArgs, typeArgs}) => BorderRadius.vertical(
             top: namedArgs.containsKey('top') ? namedArgs['top'] : Radius.zero,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : Radius.zero);
+            bottom: namedArgs.containsKey('bottom')
+                ? namedArgs['bottom']
+                : Radius.zero);
       case 'BorderRadius.horizontal':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadius.horizontal(
-            left: namedArgs.containsKey('left') ? namedArgs['left'] : Radius.zero,
-            right: namedArgs.containsKey('right') ? namedArgs['right'] : Radius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadius.horizontal(
+                left: namedArgs.containsKey('left')
+                    ? namedArgs['left']
+                    : Radius.zero,
+                right: namedArgs.containsKey('right')
+                    ? namedArgs['right']
+                    : Radius.zero);
       case 'BorderRadius.only':
         return ({positionalArgs, namedArgs, typeArgs}) => BorderRadius.only(
-            topLeft: namedArgs.containsKey('topLeft') ? namedArgs['topLeft'] : Radius.zero,
-            topRight: namedArgs.containsKey('topRight') ? namedArgs['topRight'] : Radius.zero,
-            bottomLeft: namedArgs.containsKey('bottomLeft') ? namedArgs['bottomLeft'] : Radius.zero,
-            bottomRight: namedArgs.containsKey('bottomRight') ? namedArgs['bottomRight'] : Radius.zero);
+            topLeft: namedArgs.containsKey('topLeft')
+                ? namedArgs['topLeft']
+                : Radius.zero,
+            topRight: namedArgs.containsKey('topRight')
+                ? namedArgs['topRight']
+                : Radius.zero,
+            bottomLeft: namedArgs.containsKey('bottomLeft')
+                ? namedArgs['bottomLeft']
+                : Radius.zero,
+            bottomRight: namedArgs.containsKey('bottomRight')
+                ? namedArgs['bottomRight']
+                : Radius.zero);
       case 'BorderRadius.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BorderRadius.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadius.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'BorderRadius.zero':
         return BorderRadius.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,7 +62,7 @@ extension BorderRadiusBinding on BorderRadius {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BorderRadius');
+        return const HTType('BorderRadius');
       case 'topLeft':
         return topLeft;
       case 'topRight':
@@ -57,17 +74,21 @@ extension BorderRadiusBinding on BorderRadius {
       case 'hashCode':
         return hashCode;
       case 'toRRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => toRRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toRRect(positionalArgs[0]);
       case 'subtract':
-        return ({positionalArgs, namedArgs, typeArgs}) => subtract(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            subtract(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,30 +100,52 @@ class BorderRadiusDirectionalAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BorderRadiusDirectional.all':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadiusDirectional.all(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadiusDirectional.all(positionalArgs[0]);
       case 'BorderRadiusDirectional.circular':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadiusDirectional.circular(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadiusDirectional.circular(positionalArgs[0]);
       case 'BorderRadiusDirectional.vertical':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadiusDirectional.vertical(
-            top: namedArgs.containsKey('top') ? namedArgs['top'] : Radius.zero,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : Radius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadiusDirectional.vertical(
+                top: namedArgs.containsKey('top')
+                    ? namedArgs['top']
+                    : Radius.zero,
+                bottom: namedArgs.containsKey('bottom')
+                    ? namedArgs['bottom']
+                    : Radius.zero);
       case 'BorderRadiusDirectional.horizontal':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadiusDirectional.horizontal(
-            start: namedArgs.containsKey('start') ? namedArgs['start'] : Radius.zero,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : Radius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadiusDirectional.horizontal(
+                start: namedArgs.containsKey('start')
+                    ? namedArgs['start']
+                    : Radius.zero,
+                end: namedArgs.containsKey('end')
+                    ? namedArgs['end']
+                    : Radius.zero);
       case 'BorderRadiusDirectional.only':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderRadiusDirectional.only(
-            topStart: namedArgs.containsKey('topStart') ? namedArgs['topStart'] : Radius.zero,
-            topEnd: namedArgs.containsKey('topEnd') ? namedArgs['topEnd'] : Radius.zero,
-            bottomStart: namedArgs.containsKey('bottomStart') ? namedArgs['bottomStart'] : Radius.zero,
-            bottomEnd: namedArgs.containsKey('bottomEnd') ? namedArgs['bottomEnd'] : Radius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderRadiusDirectional.only(
+                topStart: namedArgs.containsKey('topStart')
+                    ? namedArgs['topStart']
+                    : Radius.zero,
+                topEnd: namedArgs.containsKey('topEnd')
+                    ? namedArgs['topEnd']
+                    : Radius.zero,
+                bottomStart: namedArgs.containsKey('bottomStart')
+                    ? namedArgs['bottomStart']
+                    : Radius.zero,
+                bottomEnd: namedArgs.containsKey('bottomEnd')
+                    ? namedArgs['bottomEnd']
+                    : Radius.zero);
       case 'BorderRadiusDirectional.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BorderRadiusDirectional.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            BorderRadiusDirectional.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'BorderRadiusDirectional.zero':
         return BorderRadiusDirectional.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -116,7 +159,7 @@ extension BorderRadiusDirectionalBinding on BorderRadiusDirectional {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BorderRadiusDirectional');
+        return const HTType('BorderRadiusDirectional');
       case 'topStart':
         return topStart;
       case 'topEnd':
@@ -128,15 +171,18 @@ extension BorderRadiusDirectionalBinding on BorderRadiusDirectional {
       case 'hashCode':
         return hashCode;
       case 'subtract':
-        return ({positionalArgs, namedArgs, typeArgs}) => subtract(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            subtract(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/borders.g.dart b/lib/bindings/flutter/painting/borders.g.dart
index 6b9095a..c867eea 100644
--- a/lib/bindings/flutter/painting/borders.g.dart
+++ b/lib/bindings/flutter/painting/borders.g.dart
@@ -14,7 +14,7 @@ class BorderStyleAutoBinding extends HTExternalClass {
       case 'BorderStyle.solid':
         return BorderStyle.solid;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class BorderStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BorderStyle');
+        return const HTType('BorderStyle');
       case 'index':
         return (instance as BorderStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BorderStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BorderStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -41,20 +42,26 @@ class BorderSideAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'BorderSide':
         return ({positionalArgs, namedArgs, typeArgs}) => BorderSide(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : const Color(0xFF000000),
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : const Color(0xFF000000),
             width: namedArgs.containsKey('width') ? namedArgs['width'] : 1.0,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : BorderStyle.solid);
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : BorderStyle.solid);
       case 'BorderSide.merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderSide.merge(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderSide.merge(positionalArgs[0], positionalArgs[1]);
       case 'BorderSide.canMerge':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderSide.canMerge(positionalArgs[0], positionalArgs[1]);
-      case 'BorderSide.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BorderSide.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            BorderSide.canMerge(positionalArgs[0], positionalArgs[1]);
+      case 'BorderSide.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => BorderSide.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'BorderSide.none':
         return BorderSide.none;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -68,7 +75,7 @@ extension BorderSideBinding on BorderSide {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BorderSide');
+        return const HTType('BorderSide');
       case 'color':
         return color;
       case 'width':
@@ -83,13 +90,14 @@ extension BorderSideBinding on BorderSide {
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'toPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => toPaint();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/box_border.g.dart b/lib/bindings/flutter/painting/box_border.g.dart
index 3535167..a5bc58b 100644
--- a/lib/bindings/flutter/painting/box_border.g.dart
+++ b/lib/bindings/flutter/painting/box_border.g.dart
@@ -14,7 +14,7 @@ class BoxShapeAutoBinding extends HTExternalClass {
       case 'BoxShape.circle':
         return BoxShape.circle;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class BoxShapeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxShape');
+        return const HTType('BoxShape');
       case 'index':
         return (instance as BoxShape).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BoxShape).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BoxShape).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -41,28 +42,46 @@ class BorderAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'Border':
         return ({positionalArgs, namedArgs, typeArgs}) => Border(
-            top: namedArgs.containsKey('top') ? namedArgs['top'] : BorderSide.none,
-            right: namedArgs.containsKey('right') ? namedArgs['right'] : BorderSide.none,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : BorderSide.none,
-            left: namedArgs.containsKey('left') ? namedArgs['left'] : BorderSide.none);
+            top: namedArgs.containsKey('top')
+                ? namedArgs['top']
+                : BorderSide.none,
+            right: namedArgs.containsKey('right')
+                ? namedArgs['right']
+                : BorderSide.none,
+            bottom: namedArgs.containsKey('bottom')
+                ? namedArgs['bottom']
+                : BorderSide.none,
+            left: namedArgs.containsKey('left')
+                ? namedArgs['left']
+                : BorderSide.none);
       case 'Border.fromBorderSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => Border.fromBorderSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Border.fromBorderSide(positionalArgs[0]);
       case 'Border.symmetric':
         return ({positionalArgs, namedArgs, typeArgs}) => Border.symmetric(
-            vertical: namedArgs.containsKey('vertical') ? namedArgs['vertical'] : BorderSide.none,
-            horizontal: namedArgs.containsKey('horizontal') ? namedArgs['horizontal'] : BorderSide.none);
+            vertical: namedArgs.containsKey('vertical')
+                ? namedArgs['vertical']
+                : BorderSide.none,
+            horizontal: namedArgs.containsKey('horizontal')
+                ? namedArgs['horizontal']
+                : BorderSide.none);
       case 'Border.all':
         return ({positionalArgs, namedArgs, typeArgs}) => Border.all(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : const Color(0xFF000000),
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : const Color(0xFF000000),
             width: namedArgs.containsKey('width') ? namedArgs['width'] : 1.0,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : BorderStyle.solid);
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : BorderStyle.solid);
       case 'Border.merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => Border.merge(positionalArgs[0], positionalArgs[1]);
-      case 'Border.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Border.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            Border.merge(positionalArgs[0], positionalArgs[1]);
+      case 'Border.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => Border.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -76,7 +95,7 @@ extension BorderBinding on Border {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Border');
+        return const HTType('Border');
       case 'top':
         return top;
       case 'right':
@@ -92,29 +111,47 @@ extension BorderBinding on Border {
       case 'hashCode':
         return hashCode;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            add(positionalArgs[0], reversed: namedArgs.containsKey('reversed') ? namedArgs['reversed'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0],
+            reversed: namedArgs.containsKey('reversed')
+                ? namedArgs['reversed']
+                : false);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : BoxShape.rectangle,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            shape: namedArgs.containsKey('shape')
+                ? namedArgs['shape']
+                : BoxShape.rectangle,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -127,17 +164,27 @@ class BorderDirectionalAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'BorderDirectional':
         return ({positionalArgs, namedArgs, typeArgs}) => BorderDirectional(
-            top: namedArgs.containsKey('top') ? namedArgs['top'] : BorderSide.none,
-            start: namedArgs.containsKey('start') ? namedArgs['start'] : BorderSide.none,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : BorderSide.none,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : BorderSide.none);
+            top: namedArgs.containsKey('top')
+                ? namedArgs['top']
+                : BorderSide.none,
+            start: namedArgs.containsKey('start')
+                ? namedArgs['start']
+                : BorderSide.none,
+            end: namedArgs.containsKey('end')
+                ? namedArgs['end']
+                : BorderSide.none,
+            bottom: namedArgs.containsKey('bottom')
+                ? namedArgs['bottom']
+                : BorderSide.none);
       case 'BorderDirectional.merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => BorderDirectional.merge(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BorderDirectional.merge(positionalArgs[0], positionalArgs[1]);
       case 'BorderDirectional.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BorderDirectional.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            BorderDirectional.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -151,7 +198,7 @@ extension BorderDirectionalBinding on BorderDirectional {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BorderDirectional');
+        return const HTType('BorderDirectional');
       case 'top':
         return top;
       case 'start':
@@ -167,29 +214,47 @@ extension BorderDirectionalBinding on BorderDirectional {
       case 'hashCode':
         return hashCode;
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            add(positionalArgs[0], reversed: namedArgs.containsKey('reversed') ? namedArgs['reversed'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0],
+            reversed: namedArgs.containsKey('reversed')
+                ? namedArgs['reversed']
+                : false);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : BoxShape.rectangle,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            shape: namedArgs.containsKey('shape')
+                ? namedArgs['shape']
+                : BoxShape.rectangle,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/box_decoration.g.dart b/lib/bindings/flutter/painting/box_decoration.g.dart
index 410d5e4..1f9d0c2 100644
--- a/lib/bindings/flutter/painting/box_decoration.g.dart
+++ b/lib/bindings/flutter/painting/box_decoration.g.dart
@@ -12,17 +12,28 @@ class BoxDecorationAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => BoxDecoration(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            boxShadow: namedArgs.containsKey('boxShadow') ? List<BoxShadow>.from(namedArgs['boxShadow']) : null,
-            gradient: namedArgs.containsKey('gradient') ? namedArgs['gradient'] : null,
-            backgroundBlendMode: namedArgs.containsKey('backgroundBlendMode') ? namedArgs['backgroundBlendMode'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : BoxShape.rectangle);
+            border:
+                namedArgs.containsKey('border') ? namedArgs['border'] : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            boxShadow: namedArgs.containsKey('boxShadow')
+                ? List<BoxShadow>.from(namedArgs['boxShadow'])
+                : null,
+            gradient: namedArgs.containsKey('gradient')
+                ? namedArgs['gradient']
+                : null,
+            backgroundBlendMode: namedArgs.containsKey('backgroundBlendMode')
+                ? namedArgs['backgroundBlendMode']
+                : null,
+            shape: namedArgs.containsKey('shape')
+                ? namedArgs['shape']
+                : BoxShape.rectangle);
       case 'BoxDecoration.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BoxDecoration.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => BoxDecoration.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +44,8 @@ class BoxDecorationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -42,7 +54,7 @@ extension BoxDecorationBinding on BoxDecoration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxDecoration');
+        return const HTType('BoxDecoration');
       case 'color':
         return color;
       case 'image':
@@ -69,41 +81,60 @@ extension BoxDecorationBinding on BoxDecoration {
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            boxShadow: namedArgs.containsKey('boxShadow') ? List<BoxShadow>.from(namedArgs['boxShadow']) : null,
-            gradient: namedArgs.containsKey('gradient') ? namedArgs['gradient'] : null,
-            backgroundBlendMode: namedArgs.containsKey('backgroundBlendMode') ? namedArgs['backgroundBlendMode'] : null,
+            border:
+                namedArgs.containsKey('border') ? namedArgs['border'] : null,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            boxShadow: namedArgs.containsKey('boxShadow')
+                ? List<BoxShadow>.from(namedArgs['boxShadow'])
+                : null,
+            gradient: namedArgs.containsKey('gradient')
+                ? namedArgs['gradient']
+                : null,
+            backgroundBlendMode: namedArgs.containsKey('backgroundBlendMode')
+                ? namedArgs['backgroundBlendMode']
+                : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null);
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid();
       case 'getClipPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getClipPath(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getClipPath(positionalArgs[0], positionalArgs[1]);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'createBoxPainter':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createBoxPainter(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createBoxPainter(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/box_fit.g.dart b/lib/bindings/flutter/painting/box_fit.g.dart
index c6c6099..4b246a4 100644
--- a/lib/bindings/flutter/painting/box_fit.g.dart
+++ b/lib/bindings/flutter/painting/box_fit.g.dart
@@ -24,7 +24,7 @@ class BoxFitAutoBinding extends HTExternalClass {
       case 'BoxFit.scaleDown':
         return BoxFit.scaleDown;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,13 +32,14 @@ class BoxFitAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxFit');
+        return const HTType('BoxFit');
       case 'index':
         return (instance as BoxFit).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BoxFit).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BoxFit).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,9 +51,10 @@ class FittedSizesAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FittedSizes':
-        return ({positionalArgs, namedArgs, typeArgs}) => FittedSizes(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FittedSizes(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,13 +68,13 @@ extension FittedSizesBinding on FittedSizes {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FittedSizes');
+        return const HTType('FittedSizes');
       case 'source':
         return source;
       case 'destination':
         return destination;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/box_shadow.g.dart b/lib/bindings/flutter/painting/box_shadow.g.dart
index 432c419..711def6 100644
--- a/lib/bindings/flutter/painting/box_shadow.g.dart
+++ b/lib/bindings/flutter/painting/box_shadow.g.dart
@@ -9,18 +9,28 @@ class BoxShadowAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'BoxShadow':
         return ({positionalArgs, namedArgs, typeArgs}) => BoxShadow(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : const Color(0xFF000000),
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            blurRadius: namedArgs.containsKey('blurRadius') ? namedArgs['blurRadius'] : 0.0,
-            spreadRadius: namedArgs.containsKey('spreadRadius') ? namedArgs['spreadRadius'] : 0.0);
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : const Color(0xFF000000),
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            blurRadius: namedArgs.containsKey('blurRadius')
+                ? namedArgs['blurRadius']
+                : 0.0,
+            spreadRadius: namedArgs.containsKey('spreadRadius')
+                ? namedArgs['spreadRadius']
+                : 0.0);
       case 'BoxShadow.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BoxShadow.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => BoxShadow.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'BoxShadow.lerpList':
         return ({positionalArgs, namedArgs, typeArgs}) => BoxShadow.lerpList(
-            List<BoxShadow>.from(positionalArgs[0]), List<BoxShadow>.from(positionalArgs[1]), positionalArgs[2]);
+            List<BoxShadow>.from(positionalArgs[0]),
+            List<BoxShadow>.from(positionalArgs[1]),
+            positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +44,7 @@ extension BoxShadowBinding on BoxShadow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxShadow');
+        return const HTType('BoxShadow');
       case 'spreadRadius':
         return spreadRadius;
       case 'color':
@@ -50,11 +60,12 @@ extension BoxShadowBinding on BoxShadow {
       case 'toPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => toPaint();
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/circle_border.g.dart b/lib/bindings/flutter/painting/circle_border.g.dart
index 14eef1a..5491ab2 100644
--- a/lib/bindings/flutter/painting/circle_border.g.dart
+++ b/lib/bindings/flutter/painting/circle_border.g.dart
@@ -8,10 +8,12 @@ class CircleBorderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CircleBorder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            CircleBorder(side: namedArgs.containsKey('side') ? namedArgs['side'] : BorderSide.none);
+        return ({positionalArgs, namedArgs, typeArgs}) => CircleBorder(
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : BorderSide.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +27,7 @@ extension CircleBorderBinding on CircleBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CircleBorder');
+        return const HTType('CircleBorder');
       case 'side':
         return side;
       case 'dimensions':
@@ -33,27 +35,39 @@ extension CircleBorderBinding on CircleBorder {
       case 'hashCode':
         return hashCode;
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'copyWith':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            copyWith(side: namedArgs.containsKey('side') ? namedArgs['side'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
+            side: namedArgs.containsKey('side') ? namedArgs['side'] : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/colors.g.dart b/lib/bindings/flutter/painting/colors.g.dart
index 09eda0e..edd1f48 100644
--- a/lib/bindings/flutter/painting/colors.g.dart
+++ b/lib/bindings/flutter/painting/colors.g.dart
@@ -9,15 +9,19 @@ class HSVColorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'HSVColor.fromAHSV':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            HSVColor.fromAHSV(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => HSVColor.fromAHSV(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'HSVColor.fromColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => HSVColor.fromColor(positionalArgs[0]);
-      case 'HSVColor.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            HSVColor.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            HSVColor.fromColor(positionalArgs[0]);
+      case 'HSVColor.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => HSVColor.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +35,7 @@ extension HSVColorBinding on HSVColor {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HSVColor');
+        return const HTType('HSVColor');
       case 'alpha':
         return alpha;
       case 'hue':
@@ -43,19 +47,23 @@ extension HSVColorBinding on HSVColor {
       case 'hashCode':
         return hashCode;
       case 'withAlpha':
-        return ({positionalArgs, namedArgs, typeArgs}) => withAlpha(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withAlpha(positionalArgs[0]);
       case 'withHue':
-        return ({positionalArgs, namedArgs, typeArgs}) => withHue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withHue(positionalArgs[0]);
       case 'withSaturation':
-        return ({positionalArgs, namedArgs, typeArgs}) => withSaturation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withSaturation(positionalArgs[0]);
       case 'withValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => withValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withValue(positionalArgs[0]);
       case 'toColor':
         return ({positionalArgs, namedArgs, typeArgs}) => toColor();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -67,15 +75,19 @@ class HSLColorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'HSLColor.fromAHSL':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            HSLColor.fromAHSL(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => HSLColor.fromAHSL(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'HSLColor.fromColor':
-        return ({positionalArgs, namedArgs, typeArgs}) => HSLColor.fromColor(positionalArgs[0]);
-      case 'HSLColor.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            HSLColor.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            HSLColor.fromColor(positionalArgs[0]);
+      case 'HSLColor.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => HSLColor.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -89,7 +101,7 @@ extension HSLColorBinding on HSLColor {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HSLColor');
+        return const HTType('HSLColor');
       case 'alpha':
         return alpha;
       case 'hue':
@@ -101,19 +113,23 @@ extension HSLColorBinding on HSLColor {
       case 'hashCode':
         return hashCode;
       case 'withAlpha':
-        return ({positionalArgs, namedArgs, typeArgs}) => withAlpha(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withAlpha(positionalArgs[0]);
       case 'withHue':
-        return ({positionalArgs, namedArgs, typeArgs}) => withHue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withHue(positionalArgs[0]);
       case 'withSaturation':
-        return ({positionalArgs, namedArgs, typeArgs}) => withSaturation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withSaturation(positionalArgs[0]);
       case 'withLightness':
-        return ({positionalArgs, namedArgs, typeArgs}) => withLightness(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withLightness(positionalArgs[0]);
       case 'toColor':
         return ({positionalArgs, namedArgs, typeArgs}) => toColor();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -125,13 +141,22 @@ class ColorPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ColorProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => ColorProperty(positionalArgs[0], positionalArgs[1],
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : kNoDefaultValue,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.singleLine,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => ColorProperty(
+            positionalArgs[0], positionalArgs[1],
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : kNoDefaultValue,
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.singleLine,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -145,7 +170,7 @@ extension ColorPropertyBinding on ColorProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ColorProperty');
+        return const HTType('ColorProperty');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -185,33 +210,49 @@ extension ColorPropertyBinding on ColorProperty {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/continuous_rectangle_border.g.dart b/lib/bindings/flutter/painting/continuous_rectangle_border.g.dart
index 6c5d3e2..551ff07 100644
--- a/lib/bindings/flutter/painting/continuous_rectangle_border.g.dart
+++ b/lib/bindings/flutter/painting/continuous_rectangle_border.g.dart
@@ -8,11 +8,17 @@ class ContinuousRectangleBorderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ContinuousRectangleBorder':
-        return ({positionalArgs, namedArgs, typeArgs}) => ContinuousRectangleBorder(
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : BorderSide.none,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : BorderRadius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ContinuousRectangleBorder(
+                side:
+                    namedArgs.containsKey('side')
+                        ? namedArgs['side']
+                        : BorderSide.none,
+                borderRadius: namedArgs.containsKey('borderRadius')
+                    ? namedArgs['borderRadius']
+                    : BorderRadius.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +32,7 @@ extension ContinuousRectangleBorderBinding on ContinuousRectangleBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ContinuousRectangleBorder');
+        return const HTType('ContinuousRectangleBorder');
       case 'borderRadius':
         return borderRadius;
       case 'side':
@@ -36,28 +42,42 @@ extension ContinuousRectangleBorderBinding on ContinuousRectangleBorder {
       case 'hashCode':
         return hashCode;
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null);
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/debug.g.dart b/lib/bindings/flutter/painting/debug.g.dart
index 8f16f04..869e8c5 100644
--- a/lib/bindings/flutter/painting/debug.g.dart
+++ b/lib/bindings/flutter/painting/debug.g.dart
@@ -9,11 +9,14 @@ class ImageSizeInfoAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ImageSizeInfo':
         return ({positionalArgs, namedArgs, typeArgs}) => ImageSizeInfo(
-            source: namedArgs.containsKey('source') ? namedArgs['source'] : null,
-            displaySize: namedArgs.containsKey('displaySize') ? namedArgs['displaySize'] : null,
+            source:
+                namedArgs.containsKey('source') ? namedArgs['source'] : null,
+            displaySize: namedArgs.containsKey('displaySize')
+                ? namedArgs['displaySize']
+                : null,
             imageSize: namedArgs['imageSize']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +30,7 @@ extension ImageSizeInfoBinding on ImageSizeInfo {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageSizeInfo');
+        return const HTType('ImageSizeInfo');
       case 'source':
         return source;
       case 'displaySize':
@@ -45,7 +48,7 @@ extension ImageSizeInfoBinding on ImageSizeInfo {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/decoration_image.g.dart b/lib/bindings/flutter/painting/decoration_image.g.dart
index 2b35a86..85833f2 100644
--- a/lib/bindings/flutter/painting/decoration_image.g.dart
+++ b/lib/bindings/flutter/painting/decoration_image.g.dart
@@ -18,7 +18,7 @@ class ImageRepeatAutoBinding extends HTExternalClass {
       case 'ImageRepeat.noRepeat':
         return ImageRepeat.noRepeat;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class ImageRepeatAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageRepeat');
+        return const HTType('ImageRepeat');
       case 'index':
         return (instance as ImageRepeat).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ImageRepeat).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ImageRepeat).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,16 +47,27 @@ class DecorationImageAutoBinding extends HTExternalClass {
       case 'DecorationImage':
         return ({positionalArgs, namedArgs, typeArgs}) => DecorationImage(
             image: namedArgs['image'],
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : null,
-            colorFilter: namedArgs.containsKey('colorFilter') ? namedArgs['colorFilter'] : null,
+            onError:
+                namedArgs.containsKey('onError') ? namedArgs['onError'] : null,
+            colorFilter: namedArgs.containsKey('colorFilter')
+                ? namedArgs['colorFilter']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,9 +78,11 @@ class DecorationImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -77,7 +91,7 @@ extension DecorationImageBinding on DecorationImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DecorationImage');
+        return const HTType('DecorationImage');
       case 'image':
         return image;
       case 'onError':
@@ -99,11 +113,12 @@ extension DecorationImageBinding on DecorationImage {
       case 'hashCode':
         return hashCode;
       case 'createPainter':
-        return ({positionalArgs, namedArgs, typeArgs}) => createPainter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createPainter(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/edge_insets.g.dart b/lib/bindings/flutter/painting/edge_insets.g.dart
index 92a5c80..a9f9f03 100644
--- a/lib/bindings/flutter/painting/edge_insets.g.dart
+++ b/lib/bindings/flutter/painting/edge_insets.g.dart
@@ -10,30 +10,38 @@ class EdgeInsetsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'EdgeInsets.fromLTRB':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            EdgeInsets.fromLTRB(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => EdgeInsets.fromLTRB(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'EdgeInsets.all':
-        return ({positionalArgs, namedArgs, typeArgs}) => EdgeInsets.all(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            EdgeInsets.all(positionalArgs[0]);
       case 'EdgeInsets.only':
         return ({positionalArgs, namedArgs, typeArgs}) => EdgeInsets.only(
             left: namedArgs.containsKey('left') ? namedArgs['left'] : 0.0,
             top: namedArgs.containsKey('top') ? namedArgs['top'] : 0.0,
             right: namedArgs.containsKey('right') ? namedArgs['right'] : 0.0,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : 0.0);
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : 0.0);
       case 'EdgeInsets.symmetric':
         return ({positionalArgs, namedArgs, typeArgs}) => EdgeInsets.symmetric(
-            vertical: namedArgs.containsKey('vertical') ? namedArgs['vertical'] : 0.0,
-            horizontal: namedArgs.containsKey('horizontal') ? namedArgs['horizontal'] : 0.0);
+            vertical:
+                namedArgs.containsKey('vertical') ? namedArgs['vertical'] : 0.0,
+            horizontal: namedArgs.containsKey('horizontal')
+                ? namedArgs['horizontal']
+                : 0.0);
       case 'EdgeInsets.fromWindowPadding':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             EdgeInsets.fromWindowPadding(positionalArgs[0], positionalArgs[1]);
       case 'EdgeInsets.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            EdgeInsets.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => EdgeInsets.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'EdgeInsets.zero':
         return EdgeInsets.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -47,7 +55,7 @@ extension EdgeInsetsBinding on EdgeInsets {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EdgeInsets');
+        return const HTType('EdgeInsets');
       case 'left':
         return left;
       case 'top':
@@ -77,33 +85,43 @@ extension EdgeInsetsBinding on EdgeInsets {
       case 'hashCode':
         return hashCode;
       case 'inflateRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => inflateRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inflateRect(positionalArgs[0]);
       case 'deflateRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => deflateRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deflateRect(positionalArgs[0]);
       case 'subtract':
-        return ({positionalArgs, namedArgs, typeArgs}) => subtract(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            subtract(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'clamp':
-        return ({positionalArgs, namedArgs, typeArgs}) => clamp(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            clamp(positionalArgs[0], positionalArgs[1]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             left: namedArgs.containsKey('left') ? namedArgs['left'] : null,
             top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
             right: namedArgs.containsKey('right') ? namedArgs['right'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null);
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null);
       case 'along':
-        return ({positionalArgs, namedArgs, typeArgs}) => along(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            along(positionalArgs[0]);
       case 'inflateSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => inflateSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inflateSize(positionalArgs[0]);
       case 'deflateSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => deflateSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deflateSize(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -116,20 +134,26 @@ class EdgeInsetsDirectionalAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'EdgeInsetsDirectional.fromSTEB':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            EdgeInsetsDirectional.fromSTEB(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            EdgeInsetsDirectional.fromSTEB(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3]);
       case 'EdgeInsetsDirectional.only':
-        return ({positionalArgs, namedArgs, typeArgs}) => EdgeInsetsDirectional.only(
-            start: namedArgs.containsKey('start') ? namedArgs['start'] : 0.0,
-            top: namedArgs.containsKey('top') ? namedArgs['top'] : 0.0,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : 0.0,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : 0.0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            EdgeInsetsDirectional.only(
+                start:
+                    namedArgs.containsKey('start') ? namedArgs['start'] : 0.0,
+                top: namedArgs.containsKey('top') ? namedArgs['top'] : 0.0,
+                end: namedArgs.containsKey('end') ? namedArgs['end'] : 0.0,
+                bottom: namedArgs.containsKey('bottom')
+                    ? namedArgs['bottom']
+                    : 0.0);
       case 'EdgeInsetsDirectional.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            EdgeInsetsDirectional.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            EdgeInsetsDirectional.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'EdgeInsetsDirectional.zero':
         return EdgeInsetsDirectional.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -143,7 +167,7 @@ extension EdgeInsetsDirectionalBinding on EdgeInsetsDirectional {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EdgeInsetsDirectional');
+        return const HTType('EdgeInsetsDirectional');
       case 'start':
         return start;
       case 'top':
@@ -165,23 +189,30 @@ extension EdgeInsetsDirectionalBinding on EdgeInsetsDirectional {
       case 'hashCode':
         return hashCode;
       case 'subtract':
-        return ({positionalArgs, namedArgs, typeArgs}) => subtract(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            subtract(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'along':
-        return ({positionalArgs, namedArgs, typeArgs}) => along(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            along(positionalArgs[0]);
       case 'inflateSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => inflateSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inflateSize(positionalArgs[0]);
       case 'deflateSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => deflateSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deflateSize(positionalArgs[0]);
       case 'clamp':
-        return ({positionalArgs, namedArgs, typeArgs}) => clamp(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            clamp(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/flutter_logo.g.dart b/lib/bindings/flutter/painting/flutter_logo.g.dart
index beac01b..b2cc87f 100644
--- a/lib/bindings/flutter/painting/flutter_logo.g.dart
+++ b/lib/bindings/flutter/painting/flutter_logo.g.dart
@@ -17,7 +17,7 @@ class FlutterLogoStyleAutoBinding extends HTExternalClass {
       case 'FlutterLogoStyle.stacked':
         return FlutterLogoStyle.stacked;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class FlutterLogoStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlutterLogoStyle');
+        return const HTType('FlutterLogoStyle');
       case 'index':
         return (instance as FlutterLogoStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FlutterLogoStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FlutterLogoStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,14 +45,21 @@ class FlutterLogoDecorationAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'FlutterLogoDecoration':
         return ({positionalArgs, namedArgs, typeArgs}) => FlutterLogoDecoration(
-            textColor: namedArgs.containsKey('textColor') ? namedArgs['textColor'] : const Color(0xFF757575),
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : FlutterLogoStyle.markOnly,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : EdgeInsets.zero);
+            textColor: namedArgs.containsKey('textColor')
+                ? namedArgs['textColor']
+                : const Color(0xFF757575),
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : FlutterLogoStyle.markOnly,
+            margin: namedArgs.containsKey('margin')
+                ? namedArgs['margin']
+                : EdgeInsets.zero);
       case 'FlutterLogoDecoration.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FlutterLogoDecoration.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            FlutterLogoDecoration.lerp(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,7 +70,8 @@ class FlutterLogoDecorationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -71,7 +80,7 @@ extension FlutterLogoDecorationBinding on FlutterLogoDecoration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlutterLogoDecoration');
+        return const HTType('FlutterLogoDecoration');
       case 'textColor':
         return textColor;
       case 'style':
@@ -87,30 +96,39 @@ extension FlutterLogoDecorationBinding on FlutterLogoDecoration {
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid();
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'createBoxPainter':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createBoxPainter(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createBoxPainter(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'getClipPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getClipPath(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getClipPath(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/fractional_offset.g.dart b/lib/bindings/flutter/painting/fractional_offset.g.dart
index e7df8ec..3e3bc7b 100644
--- a/lib/bindings/flutter/painting/fractional_offset.g.dart
+++ b/lib/bindings/flutter/painting/fractional_offset.g.dart
@@ -8,16 +8,19 @@ class FractionalOffsetAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FractionalOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => FractionalOffset(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FractionalOffset(positionalArgs[0], positionalArgs[1]);
       case 'FractionalOffset.fromOffsetAndSize':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FractionalOffset.fromOffsetAndSize(positionalArgs[0], positionalArgs[1]);
+            FractionalOffset.fromOffsetAndSize(
+                positionalArgs[0], positionalArgs[1]);
       case 'FractionalOffset.fromOffsetAndRect':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FractionalOffset.fromOffsetAndRect(positionalArgs[0], positionalArgs[1]);
+            FractionalOffset.fromOffsetAndRect(
+                positionalArgs[0], positionalArgs[1]);
       case 'FractionalOffset.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            FractionalOffset.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => FractionalOffset.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'FractionalOffset.topLeft':
         return FractionalOffset.topLeft;
       case 'FractionalOffset.topCenter':
@@ -37,7 +40,7 @@ class FractionalOffsetAutoBinding extends HTExternalClass {
       case 'FractionalOffset.bottomRight':
         return FractionalOffset.bottomRight;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -51,7 +54,7 @@ extension FractionalOffsetBinding on FractionalOffset {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FractionalOffset');
+        return const HTType('FractionalOffset');
       case 'x':
         return x;
       case 'y':
@@ -65,19 +68,25 @@ extension FractionalOffsetBinding on FractionalOffset {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'alongOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => alongOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            alongOffset(positionalArgs[0]);
       case 'alongSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => alongSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            alongSize(positionalArgs[0]);
       case 'withinRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => withinRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            withinRect(positionalArgs[0]);
       case 'inscribe':
-        return ({positionalArgs, namedArgs, typeArgs}) => inscribe(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inscribe(positionalArgs[0], positionalArgs[1]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/gradient.g.dart b/lib/bindings/flutter/painting/gradient.g.dart
index 3314705..49a5279 100644
--- a/lib/bindings/flutter/painting/gradient.g.dart
+++ b/lib/bindings/flutter/painting/gradient.g.dart
@@ -10,9 +10,10 @@ class GradientRotationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'GradientRotation':
-        return ({positionalArgs, namedArgs, typeArgs}) => GradientRotation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            GradientRotation(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,14 +27,17 @@ extension GradientRotationBinding on GradientRotation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GradientRotation');
+        return const HTType('GradientRotation');
       case 'radians':
         return radians;
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => transform(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,17 +50,27 @@ class LinearGradientAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'LinearGradient':
         return ({positionalArgs, namedArgs, typeArgs}) => LinearGradient(
-            begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : Alignment.centerLeft,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : Alignment.centerRight,
+            begin: namedArgs.containsKey('begin')
+                ? namedArgs['begin']
+                : Alignment.centerLeft,
+            end: namedArgs.containsKey('end')
+                ? namedArgs['end']
+                : Alignment.centerRight,
             colors: List<Color>.from(namedArgs['colors']),
-            stops: namedArgs.containsKey('stops') ? List<double>.from(namedArgs['stops']) : null,
-            tileMode: namedArgs.containsKey('tileMode') ? namedArgs['tileMode'] : TileMode.clamp,
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null);
+            stops: namedArgs.containsKey('stops')
+                ? List<double>.from(namedArgs['stops'])
+                : null,
+            tileMode: namedArgs.containsKey('tileMode')
+                ? namedArgs['tileMode']
+                : TileMode.clamp,
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null);
       case 'LinearGradient.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            LinearGradient.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => LinearGradient.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -70,7 +84,7 @@ extension LinearGradientBinding on LinearGradient {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LinearGradient');
+        return const HTType('LinearGradient');
       case 'begin':
         return begin;
       case 'end':
@@ -86,18 +100,24 @@ extension LinearGradientBinding on LinearGradient {
       case 'hashCode':
         return hashCode;
       case 'createShader':
-        return ({positionalArgs, namedArgs, typeArgs}) => createShader(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createShader(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -110,19 +130,29 @@ class RadialGradientAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RadialGradient':
         return ({positionalArgs, namedArgs, typeArgs}) => RadialGradient(
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : Alignment.center,
+            center: namedArgs.containsKey('center')
+                ? namedArgs['center']
+                : Alignment.center,
             radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : 0.5,
             colors: List<Color>.from(namedArgs['colors']),
-            stops: namedArgs.containsKey('stops') ? List<double>.from(namedArgs['stops']) : null,
-            tileMode: namedArgs.containsKey('tileMode') ? namedArgs['tileMode'] : TileMode.clamp,
+            stops: namedArgs.containsKey('stops')
+                ? List<double>.from(namedArgs['stops'])
+                : null,
+            tileMode: namedArgs.containsKey('tileMode')
+                ? namedArgs['tileMode']
+                : TileMode.clamp,
             focal: namedArgs.containsKey('focal') ? namedArgs['focal'] : null,
-            focalRadius: namedArgs.containsKey('focalRadius') ? namedArgs['focalRadius'] : 0.0,
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null);
+            focalRadius: namedArgs.containsKey('focalRadius')
+                ? namedArgs['focalRadius']
+                : 0.0,
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null);
       case 'RadialGradient.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RadialGradient.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => RadialGradient.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -136,7 +166,7 @@ extension RadialGradientBinding on RadialGradient {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RadialGradient');
+        return const HTType('RadialGradient');
       case 'center':
         return center;
       case 'radius':
@@ -156,18 +186,24 @@ extension RadialGradientBinding on RadialGradient {
       case 'hashCode':
         return hashCode;
       case 'createShader':
-        return ({positionalArgs, namedArgs, typeArgs}) => createShader(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createShader(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -180,18 +216,30 @@ class SweepGradientAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SweepGradient':
         return ({positionalArgs, namedArgs, typeArgs}) => SweepGradient(
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : Alignment.center,
-            startAngle: namedArgs.containsKey('startAngle') ? namedArgs['startAngle'] : 0.0,
-            endAngle: namedArgs.containsKey('endAngle') ? namedArgs['endAngle'] : math.pi * 2,
+            center: namedArgs.containsKey('center')
+                ? namedArgs['center']
+                : Alignment.center,
+            startAngle: namedArgs.containsKey('startAngle')
+                ? namedArgs['startAngle']
+                : 0.0,
+            endAngle: namedArgs.containsKey('endAngle')
+                ? namedArgs['endAngle']
+                : math.pi * 2,
             colors: List<Color>.from(namedArgs['colors']),
-            stops: namedArgs.containsKey('stops') ? List<double>.from(namedArgs['stops']) : null,
-            tileMode: namedArgs.containsKey('tileMode') ? namedArgs['tileMode'] : TileMode.clamp,
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null);
+            stops: namedArgs.containsKey('stops')
+                ? List<double>.from(namedArgs['stops'])
+                : null,
+            tileMode: namedArgs.containsKey('tileMode')
+                ? namedArgs['tileMode']
+                : TileMode.clamp,
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null);
       case 'SweepGradient.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            SweepGradient.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => SweepGradient.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -205,7 +253,7 @@ extension SweepGradientBinding on SweepGradient {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SweepGradient');
+        return const HTType('SweepGradient');
       case 'center':
         return center;
       case 'startAngle':
@@ -223,18 +271,24 @@ extension SweepGradientBinding on SweepGradient {
       case 'hashCode':
         return hashCode;
       case 'createShader':
-        return ({positionalArgs, namedArgs, typeArgs}) => createShader(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createShader(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/image_cache.g.dart b/lib/bindings/flutter/painting/image_cache.g.dart
index 7a45294..c306b37 100644
--- a/lib/bindings/flutter/painting/image_cache.g.dart
+++ b/lib/bindings/flutter/painting/image_cache.g.dart
@@ -10,7 +10,7 @@ class ImageCacheAutoBinding extends HTExternalClass {
       case 'ImageCache':
         return ({positionalArgs, namedArgs, typeArgs}) => ImageCache();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,8 +26,9 @@ class ImageCacheAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -36,7 +37,7 @@ extension ImageCacheBinding on ImageCache {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageCache');
+        return const HTType('ImageCache');
       case 'maximumSize':
         return maximumSize;
       case 'currentSize':
@@ -52,19 +53,26 @@ extension ImageCacheBinding on ImageCache {
       case 'clear':
         return ({positionalArgs, namedArgs, typeArgs}) => clear();
       case 'evict':
-        return ({positionalArgs, namedArgs, typeArgs}) => evict(positionalArgs[0],
-            includeLive: namedArgs.containsKey('includeLive') ? namedArgs['includeLive'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => evict(
+            positionalArgs[0],
+            includeLive: namedArgs.containsKey('includeLive')
+                ? namedArgs['includeLive']
+                : true);
       case 'putIfAbsent':
-        return ({positionalArgs, namedArgs, typeArgs}) => putIfAbsent(positionalArgs[0], positionalArgs[1],
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => putIfAbsent(
+            positionalArgs[0], positionalArgs[1],
+            onError:
+                namedArgs.containsKey('onError') ? namedArgs['onError'] : null);
       case 'statusForKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => statusForKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            statusForKey(positionalArgs[0]);
       case 'containsKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => containsKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            containsKey(positionalArgs[0]);
       case 'clearLiveImages':
         return ({positionalArgs, namedArgs, typeArgs}) => clearLiveImages();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -77,7 +85,7 @@ extension ImageCacheBinding on ImageCache {
         maximumSizeBytes = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/image_provider.g.dart b/lib/bindings/flutter/painting/image_provider.g.dart
index 19dfb6b..19986e8 100644
--- a/lib/bindings/flutter/painting/image_provider.g.dart
+++ b/lib/bindings/flutter/painting/image_provider.g.dart
@@ -11,16 +11,24 @@ class ImageConfigurationAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ImageConfiguration':
         return ({positionalArgs, namedArgs, typeArgs}) => ImageConfiguration(
-            bundle: namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
-            devicePixelRatio: namedArgs.containsKey('devicePixelRatio') ? namedArgs['devicePixelRatio'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            bundle:
+                namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
+            devicePixelRatio: namedArgs.containsKey('devicePixelRatio')
+                ? namedArgs['devicePixelRatio']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            platform: namedArgs.containsKey('platform') ? namedArgs['platform'] : null);
+            platform: namedArgs.containsKey('platform')
+                ? namedArgs['platform']
+                : null);
       case 'ImageConfiguration.empty':
         return ImageConfiguration.empty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +42,7 @@ extension ImageConfigurationBinding on ImageConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageConfiguration');
+        return const HTType('ImageConfiguration');
       case 'bundle':
         return bundle;
       case 'devicePixelRatio':
@@ -51,16 +59,24 @@ extension ImageConfigurationBinding on ImageConfiguration {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            bundle: namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
-            devicePixelRatio: namedArgs.containsKey('devicePixelRatio') ? namedArgs['devicePixelRatio'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            bundle:
+                namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
+            devicePixelRatio: namedArgs.containsKey('devicePixelRatio')
+                ? namedArgs['devicePixelRatio']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            platform: namedArgs.containsKey('platform') ? namedArgs['platform'] : null);
+            platform: namedArgs.containsKey('platform')
+                ? namedArgs['platform']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -72,10 +88,12 @@ class AssetBundleImageKeyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AssetBundleImageKey':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            AssetBundleImageKey(bundle: namedArgs['bundle'], name: namedArgs['name'], scale: namedArgs['scale']);
+        return ({positionalArgs, namedArgs, typeArgs}) => AssetBundleImageKey(
+            bundle: namedArgs['bundle'],
+            name: namedArgs['name'],
+            scale: namedArgs['scale']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -89,7 +107,7 @@ extension AssetBundleImageKeyBinding on AssetBundleImageKey {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AssetBundleImageKey');
+        return const HTType('AssetBundleImageKey');
       case 'bundle':
         return bundle;
       case 'name':
@@ -101,7 +119,7 @@ extension AssetBundleImageKeyBinding on AssetBundleImageKey {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -113,15 +131,20 @@ class ResizeImageAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ResizeImage':
-        return ({positionalArgs, namedArgs, typeArgs}) => ResizeImage(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => ResizeImage(
+            positionalArgs[0],
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            allowUpscaling: namedArgs.containsKey('allowUpscaling') ? namedArgs['allowUpscaling'] : false);
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            allowUpscaling: namedArgs.containsKey('allowUpscaling')
+                ? namedArgs['allowUpscaling']
+                : false);
       case 'ResizeImage.resizeIfNeeded':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ResizeImage.resizeIfNeeded(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ResizeImage.resizeIfNeeded(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -132,12 +155,18 @@ class ResizeImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DecoderCallback': (HTFunction function) => (bytes, {cacheWidth, cacheHeight, allowUpscaling}) => function.call(
-              positionalArgs: [bytes],
-              namedArgs: {'cacheWidth': cacheWidth, 'cacheHeight': cacheHeight, 'allowUpscaling': allowUpscaling})
-          as Future<ui.Codec>,
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'DecoderCallback': (HTFunction function) => (bytes,
+              {cacheWidth, cacheHeight, allowUpscaling}) =>
+          function.call(positionalArgs: [
+            bytes
+          ], namedArgs: {
+            'cacheWidth': cacheWidth,
+            'cacheHeight': cacheHeight,
+            'allowUpscaling': allowUpscaling
+          }) as Future<ui.Codec>,
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -146,7 +175,7 @@ extension ResizeImageBinding on ResizeImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ResizeImage');
+        return const HTType('ResizeImage');
       case 'imageProvider':
         return imageProvider;
       case 'width':
@@ -156,24 +185,32 @@ extension ResizeImageBinding on ResizeImage {
       case 'allowUpscaling':
         return allowUpscaling;
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            load(positionalArgs[0], positionalArgs[1]);
       case 'obtainKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => obtainKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            obtainKey(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'obtainCacheStatus':
         return ({positionalArgs, namedArgs, typeArgs}) => obtainCacheStatus(
-            configuration: namedArgs.containsKey('configuration') ? namedArgs['configuration'] : null,
-            handleError: namedArgs.containsKey('handleError') ? namedArgs['handleError'] : null);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : null,
+            handleError: namedArgs.containsKey('handleError')
+                ? namedArgs['handleError']
+                : null);
       case 'evict':
         return ({positionalArgs, namedArgs, typeArgs}) => evict(
             cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : null,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -185,11 +222,13 @@ class NetworkImageAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NetworkImage':
-        return ({positionalArgs, namedArgs, typeArgs}) => NetworkImage(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => NetworkImage(
+            positionalArgs[0],
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : null,
-            headers: namedArgs.containsKey('headers') ? namedArgs['headers'] : null);
+            headers:
+                namedArgs.containsKey('headers') ? namedArgs['headers'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -200,12 +239,18 @@ class NetworkImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DecoderCallback': (HTFunction function) => (bytes, {cacheWidth, cacheHeight, allowUpscaling}) => function.call(
-              positionalArgs: [bytes],
-              namedArgs: {'cacheWidth': cacheWidth, 'cacheHeight': cacheHeight, 'allowUpscaling': allowUpscaling})
-          as Future<ui.Codec>,
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'DecoderCallback': (HTFunction function) => (bytes,
+              {cacheWidth, cacheHeight, allowUpscaling}) =>
+          function.call(positionalArgs: [
+            bytes
+          ], namedArgs: {
+            'cacheWidth': cacheWidth,
+            'cacheHeight': cacheHeight,
+            'allowUpscaling': allowUpscaling
+          }) as Future<ui.Codec>,
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -214,7 +259,7 @@ extension NetworkImageBinding on NetworkImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NetworkImage');
+        return const HTType('NetworkImage');
       case 'url':
         return url;
       case 'scale':
@@ -222,24 +267,32 @@ extension NetworkImageBinding on NetworkImage {
       case 'headers':
         return headers;
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            load(positionalArgs[0], positionalArgs[1]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'obtainCacheStatus':
         return ({positionalArgs, namedArgs, typeArgs}) => obtainCacheStatus(
-            configuration: namedArgs.containsKey('configuration') ? namedArgs['configuration'] : null,
-            handleError: namedArgs.containsKey('handleError') ? namedArgs['handleError'] : null);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : null,
+            handleError: namedArgs.containsKey('handleError')
+                ? namedArgs['handleError']
+                : null);
       case 'evict':
         return ({positionalArgs, namedArgs, typeArgs}) => evict(
             cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : null,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty);
       case 'obtainKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => obtainKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            obtainKey(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -251,10 +304,11 @@ class FileImageAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FileImage':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            FileImage(positionalArgs[0], scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0);
+        return ({positionalArgs, namedArgs, typeArgs}) => FileImage(
+            positionalArgs[0],
+            scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -265,12 +319,18 @@ class FileImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DecoderCallback': (HTFunction function) => (bytes, {cacheWidth, cacheHeight, allowUpscaling}) => function.call(
-              positionalArgs: [bytes],
-              namedArgs: {'cacheWidth': cacheWidth, 'cacheHeight': cacheHeight, 'allowUpscaling': allowUpscaling})
-          as Future<ui.Codec>,
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'DecoderCallback': (HTFunction function) => (bytes,
+              {cacheWidth, cacheHeight, allowUpscaling}) =>
+          function.call(positionalArgs: [
+            bytes
+          ], namedArgs: {
+            'cacheWidth': cacheWidth,
+            'cacheHeight': cacheHeight,
+            'allowUpscaling': allowUpscaling
+          }) as Future<ui.Codec>,
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -279,7 +339,7 @@ extension FileImageBinding on FileImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FileImage');
+        return const HTType('FileImage');
       case 'file':
         return file;
       case 'scale':
@@ -287,24 +347,32 @@ extension FileImageBinding on FileImage {
       case 'hashCode':
         return hashCode;
       case 'obtainKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => obtainKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            obtainKey(positionalArgs[0]);
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            load(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'obtainCacheStatus':
         return ({positionalArgs, namedArgs, typeArgs}) => obtainCacheStatus(
-            configuration: namedArgs.containsKey('configuration') ? namedArgs['configuration'] : null,
-            handleError: namedArgs.containsKey('handleError') ? namedArgs['handleError'] : null);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : null,
+            handleError: namedArgs.containsKey('handleError')
+                ? namedArgs['handleError']
+                : null);
       case 'evict':
         return ({positionalArgs, namedArgs, typeArgs}) => evict(
             cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : null,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -316,10 +384,11 @@ class MemoryImageAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MemoryImage':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            MemoryImage(positionalArgs[0], scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0);
+        return ({positionalArgs, namedArgs, typeArgs}) => MemoryImage(
+            positionalArgs[0],
+            scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -330,12 +399,18 @@ class MemoryImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DecoderCallback': (HTFunction function) => (bytes, {cacheWidth, cacheHeight, allowUpscaling}) => function.call(
-              positionalArgs: [bytes],
-              namedArgs: {'cacheWidth': cacheWidth, 'cacheHeight': cacheHeight, 'allowUpscaling': allowUpscaling})
-          as Future<ui.Codec>,
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'DecoderCallback': (HTFunction function) => (bytes,
+              {cacheWidth, cacheHeight, allowUpscaling}) =>
+          function.call(positionalArgs: [
+            bytes
+          ], namedArgs: {
+            'cacheWidth': cacheWidth,
+            'cacheHeight': cacheHeight,
+            'allowUpscaling': allowUpscaling
+          }) as Future<ui.Codec>,
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -344,7 +419,7 @@ extension MemoryImageBinding on MemoryImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MemoryImage');
+        return const HTType('MemoryImage');
       case 'bytes':
         return bytes;
       case 'scale':
@@ -352,24 +427,32 @@ extension MemoryImageBinding on MemoryImage {
       case 'hashCode':
         return hashCode;
       case 'obtainKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => obtainKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            obtainKey(positionalArgs[0]);
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            load(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'obtainCacheStatus':
         return ({positionalArgs, namedArgs, typeArgs}) => obtainCacheStatus(
-            configuration: namedArgs.containsKey('configuration') ? namedArgs['configuration'] : null,
-            handleError: namedArgs.containsKey('handleError') ? namedArgs['handleError'] : null);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : null,
+            handleError: namedArgs.containsKey('handleError')
+                ? namedArgs['handleError']
+                : null);
       case 'evict':
         return ({positionalArgs, namedArgs, typeArgs}) => evict(
             cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : null,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -381,12 +464,15 @@ class ExactAssetImageAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ExactAssetImage':
-        return ({positionalArgs, namedArgs, typeArgs}) => ExactAssetImage(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => ExactAssetImage(
+            positionalArgs[0],
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
-            bundle: namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
-            package: namedArgs.containsKey('package') ? namedArgs['package'] : null);
+            bundle:
+                namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
+            package:
+                namedArgs.containsKey('package') ? namedArgs['package'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -397,12 +483,18 @@ class ExactAssetImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DecoderCallback': (HTFunction function) => (bytes, {cacheWidth, cacheHeight, allowUpscaling}) => function.call(
-              positionalArgs: [bytes],
-              namedArgs: {'cacheWidth': cacheWidth, 'cacheHeight': cacheHeight, 'allowUpscaling': allowUpscaling})
-          as Future<ui.Codec>,
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'DecoderCallback': (HTFunction function) => (bytes,
+              {cacheWidth, cacheHeight, allowUpscaling}) =>
+          function.call(positionalArgs: [
+            bytes
+          ], namedArgs: {
+            'cacheWidth': cacheWidth,
+            'cacheHeight': cacheHeight,
+            'allowUpscaling': allowUpscaling
+          }) as Future<ui.Codec>,
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -411,7 +503,7 @@ extension ExactAssetImageBinding on ExactAssetImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExactAssetImage');
+        return const HTType('ExactAssetImage');
       case 'assetName':
         return assetName;
       case 'scale':
@@ -425,24 +517,32 @@ extension ExactAssetImageBinding on ExactAssetImage {
       case 'hashCode':
         return hashCode;
       case 'obtainKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => obtainKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            obtainKey(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            load(positionalArgs[0], positionalArgs[1]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'obtainCacheStatus':
         return ({positionalArgs, namedArgs, typeArgs}) => obtainCacheStatus(
-            configuration: namedArgs.containsKey('configuration') ? namedArgs['configuration'] : null,
-            handleError: namedArgs.containsKey('handleError') ? namedArgs['handleError'] : null);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : null,
+            handleError: namedArgs.containsKey('handleError')
+                ? namedArgs['handleError']
+                : null);
       case 'evict':
         return ({positionalArgs, namedArgs, typeArgs}) => evict(
             cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : null,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -455,9 +555,10 @@ class NetworkImageLoadExceptionAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'NetworkImageLoadException':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            NetworkImageLoadException(statusCode: namedArgs['statusCode'], uri: namedArgs['uri']);
+            NetworkImageLoadException(
+                statusCode: namedArgs['statusCode'], uri: namedArgs['uri']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -471,7 +572,7 @@ extension NetworkImageLoadExceptionBinding on NetworkImageLoadException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NetworkImageLoadException');
+        return const HTType('NetworkImageLoadException');
       case 'statusCode':
         return statusCode;
       case 'uri':
@@ -479,7 +580,7 @@ extension NetworkImageLoadExceptionBinding on NetworkImageLoadException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/image_resolution.g.dart b/lib/bindings/flutter/painting/image_resolution.g.dart
index a4562e4..ea28051 100644
--- a/lib/bindings/flutter/painting/image_resolution.g.dart
+++ b/lib/bindings/flutter/painting/image_resolution.g.dart
@@ -10,11 +10,14 @@ class AssetImageAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AssetImage':
-        return ({positionalArgs, namedArgs, typeArgs}) => AssetImage(positionalArgs[0],
-            bundle: namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
-            package: namedArgs.containsKey('package') ? namedArgs['package'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => AssetImage(
+            positionalArgs[0],
+            bundle:
+                namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
+            package:
+                namedArgs.containsKey('package') ? namedArgs['package'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,12 +28,18 @@ class AssetImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'DecoderCallback': (HTFunction function) => (bytes, {cacheWidth, cacheHeight, allowUpscaling}) => function.call(
-              positionalArgs: [bytes],
-              namedArgs: {'cacheWidth': cacheWidth, 'cacheHeight': cacheHeight, 'allowUpscaling': allowUpscaling})
-          as Future<ui.Codec>,
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'DecoderCallback': (HTFunction function) => (bytes,
+              {cacheWidth, cacheHeight, allowUpscaling}) =>
+          function.call(positionalArgs: [
+            bytes
+          ], namedArgs: {
+            'cacheWidth': cacheWidth,
+            'cacheHeight': cacheHeight,
+            'allowUpscaling': allowUpscaling
+          }) as Future<ui.Codec>,
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -39,7 +48,7 @@ extension AssetImageBinding on AssetImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AssetImage');
+        return const HTType('AssetImage');
       case 'assetName':
         return assetName;
       case 'bundle':
@@ -51,24 +60,32 @@ extension AssetImageBinding on AssetImage {
       case 'hashCode':
         return hashCode;
       case 'obtainKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => obtainKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            obtainKey(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            load(positionalArgs[0], positionalArgs[1]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'obtainCacheStatus':
         return ({positionalArgs, namedArgs, typeArgs}) => obtainCacheStatus(
-            configuration: namedArgs.containsKey('configuration') ? namedArgs['configuration'] : null,
-            handleError: namedArgs.containsKey('handleError') ? namedArgs['handleError'] : null);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : null,
+            handleError: namedArgs.containsKey('handleError')
+                ? namedArgs['handleError']
+                : null);
       case 'evict':
         return ({positionalArgs, namedArgs, typeArgs}) => evict(
             cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : null,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty);
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/image_stream.g.dart b/lib/bindings/flutter/painting/image_stream.g.dart
index 2786899..37fa00e 100644
--- a/lib/bindings/flutter/painting/image_stream.g.dart
+++ b/lib/bindings/flutter/painting/image_stream.g.dart
@@ -12,9 +12,11 @@ class ImageInfoAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ImageInfo(
             image: namedArgs['image'],
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +30,7 @@ extension ImageInfoBinding on ImageInfo {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageInfo');
+        return const HTType('ImageInfo');
       case 'image':
         return image;
       case 'scale':
@@ -40,13 +42,14 @@ extension ImageInfoBinding on ImageInfo {
       case 'clone':
         return ({positionalArgs, namedArgs, typeArgs}) => clone();
       case 'isCloneOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => isCloneOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isCloneOf(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -58,11 +61,14 @@ class ImageStreamListenerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ImageStreamListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => ImageStreamListener(positionalArgs[0],
-            onChunk: namedArgs.containsKey('onChunk') ? namedArgs['onChunk'] : null,
-            onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ImageStreamListener(
+            positionalArgs[0],
+            onChunk:
+                namedArgs.containsKey('onChunk') ? namedArgs['onChunk'] : null,
+            onError:
+                namedArgs.containsKey('onError') ? namedArgs['onError'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -73,12 +79,14 @@ class ImageStreamListenerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageListener': (HTFunction function) =>
-          (image, synchronousCall) => function.call(positionalArgs: [image, synchronousCall], namedArgs: const {}),
-      'ImageChunkListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'ImageErrorListener': (HTFunction function) =>
-          (exception, stackTrace) => function.call(positionalArgs: [exception, stackTrace], namedArgs: const {}),
+      'ImageListener': (HTFunction function) => (image, synchronousCall) =>
+          function.call(
+              positionalArgs: [image, synchronousCall], namedArgs: const {}),
+      'ImageChunkListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'ImageErrorListener': (HTFunction function) => (exception, stackTrace) =>
+          function.call(
+              positionalArgs: [exception, stackTrace], namedArgs: const {}),
     };
   }
 }
@@ -87,7 +95,7 @@ extension ImageStreamListenerBinding on ImageStreamListener {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageStreamListener');
+        return const HTType('ImageStreamListener');
       case 'onImage':
         return onImage;
       case 'onChunk':
@@ -97,7 +105,7 @@ extension ImageStreamListenerBinding on ImageStreamListener {
       case 'hashCode':
         return hashCode;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -113,7 +121,7 @@ class ImageChunkEventAutoBinding extends HTExternalClass {
             cumulativeBytesLoaded: namedArgs['cumulativeBytesLoaded'],
             expectedTotalBytes: namedArgs['expectedTotalBytes']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -127,24 +135,27 @@ extension ImageChunkEventBinding on ImageChunkEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageChunkEvent');
+        return const HTType('ImageChunkEvent');
       case 'cumulativeBytesLoaded':
         return cumulativeBytesLoaded;
       case 'expectedTotalBytes':
         return expectedTotalBytes;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -158,7 +169,7 @@ class ImageStreamAutoBinding extends HTExternalClass {
       case 'ImageStream':
         return ({positionalArgs, namedArgs, typeArgs}) => ImageStream();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -172,46 +183,56 @@ extension ImageStreamBinding on ImageStream {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageStream');
+        return const HTType('ImageStream');
       case 'completer':
         return completer;
       case 'key':
         return key;
       case 'setCompleter':
-        return ({positionalArgs, namedArgs, typeArgs}) => setCompleter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setCompleter(positionalArgs[0]);
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class OneFrameImageStreamCompleterAutoBinding extends HTExternalClass {
-  OneFrameImageStreamCompleterAutoBinding() : super('OneFrameImageStreamCompleter');
+  OneFrameImageStreamCompleterAutoBinding()
+      : super('OneFrameImageStreamCompleter');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'OneFrameImageStreamCompleter':
-        return ({positionalArgs, namedArgs, typeArgs}) => OneFrameImageStreamCompleter(positionalArgs[0],
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OneFrameImageStreamCompleter(positionalArgs[0],
+                informationCollector:
+                    namedArgs.containsKey('informationCollector')
+                        ? namedArgs['informationCollector']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -227,9 +248,11 @@ class OneFrameImageStreamCompleterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InformationCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Iterable<DiagnosticsNode>,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'InformationCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Iterable<DiagnosticsNode>,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -238,32 +261,39 @@ extension OneFrameImageStreamCompleterBinding on OneFrameImageStreamCompleter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OneFrameImageStreamCompleter');
+        return const HTType('OneFrameImageStreamCompleter');
       case 'debugLabel':
         return debugLabel;
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'keepAlive':
         return ({positionalArgs, namedArgs, typeArgs}) => keepAlive();
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'addOnLastListenerRemovedCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addOnLastListenerRemovedCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addOnLastListenerRemovedCallback(positionalArgs[0]);
       case 'removeOnLastListenerRemovedCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeOnLastListenerRemovedCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeOnLastListenerRemovedCallback(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -273,27 +303,35 @@ extension OneFrameImageStreamCompleterBinding on OneFrameImageStreamCompleter {
         debugLabel = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class MultiFrameImageStreamCompleterAutoBinding extends HTExternalClass {
-  MultiFrameImageStreamCompleterAutoBinding() : super('MultiFrameImageStreamCompleter');
+  MultiFrameImageStreamCompleterAutoBinding()
+      : super('MultiFrameImageStreamCompleter');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MultiFrameImageStreamCompleter':
-        return ({positionalArgs, namedArgs, typeArgs}) => MultiFrameImageStreamCompleter(
-            codec: namedArgs['codec'],
-            scale: namedArgs['scale'],
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            chunkEvents: namedArgs.containsKey('chunkEvents') ? namedArgs['chunkEvents'] : null,
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MultiFrameImageStreamCompleter(
+                codec: namedArgs['codec'],
+                scale: namedArgs['scale'],
+                debugLabel: namedArgs.containsKey('debugLabel')
+                    ? namedArgs['debugLabel']
+                    : null,
+                chunkEvents: namedArgs.containsKey('chunkEvents')
+                    ? namedArgs['chunkEvents']
+                    : null,
+                informationCollector:
+                    namedArgs.containsKey('informationCollector')
+                        ? namedArgs['informationCollector']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -309,43 +347,53 @@ class MultiFrameImageStreamCompleterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InformationCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Iterable<DiagnosticsNode>,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'InformationCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Iterable<DiagnosticsNode>,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension MultiFrameImageStreamCompleterBinding on MultiFrameImageStreamCompleter {
+extension MultiFrameImageStreamCompleterBinding
+    on MultiFrameImageStreamCompleter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MultiFrameImageStreamCompleter');
+        return const HTType('MultiFrameImageStreamCompleter');
       case 'debugLabel':
         return debugLabel;
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'keepAlive':
         return ({positionalArgs, namedArgs, typeArgs}) => keepAlive();
       case 'addOnLastListenerRemovedCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addOnLastListenerRemovedCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addOnLastListenerRemovedCallback(positionalArgs[0]);
       case 'removeOnLastListenerRemovedCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeOnLastListenerRemovedCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeOnLastListenerRemovedCallback(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -355,7 +403,7 @@ extension MultiFrameImageStreamCompleterBinding on MultiFrameImageStreamComplete
         debugLabel = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/inline_span.g.dart b/lib/bindings/flutter/painting/inline_span.g.dart
index 02cf235..60a88ba 100644
--- a/lib/bindings/flutter/painting/inline_span.g.dart
+++ b/lib/bindings/flutter/painting/inline_span.g.dart
@@ -11,7 +11,7 @@ class AccumulatorAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Accumulator(positionalArgs.length > 0 ? positionalArgs[0] : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,32 +25,41 @@ extension AccumulatorBinding on Accumulator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Accumulator');
+        return const HTType('Accumulator');
       case 'value':
         return value;
       case 'increment':
-        return ({positionalArgs, namedArgs, typeArgs}) => increment(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            increment(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class InlineSpanSemanticsInformationAutoBinding extends HTExternalClass {
-  InlineSpanSemanticsInformationAutoBinding() : super('InlineSpanSemanticsInformation');
+  InlineSpanSemanticsInformationAutoBinding()
+      : super('InlineSpanSemanticsInformation');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'InlineSpanSemanticsInformation':
-        return ({positionalArgs, namedArgs, typeArgs}) => InlineSpanSemanticsInformation(positionalArgs[0],
-            isPlaceholder: namedArgs.containsKey('isPlaceholder') ? namedArgs['isPlaceholder'] : false,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            recognizer: namedArgs.containsKey('recognizer') ? namedArgs['recognizer'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InlineSpanSemanticsInformation(positionalArgs[0],
+                isPlaceholder: namedArgs.containsKey('isPlaceholder')
+                    ? namedArgs['isPlaceholder']
+                    : false,
+                semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                    ? namedArgs['semanticsLabel']
+                    : null,
+                recognizer: namedArgs.containsKey('recognizer')
+                    ? namedArgs['recognizer']
+                    : null);
       case 'InlineSpanSemanticsInformation.placeholder':
         return InlineSpanSemanticsInformation.placeholder;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -60,11 +69,12 @@ class InlineSpanSemanticsInformationAutoBinding extends HTExternalClass {
   }
 }
 
-extension InlineSpanSemanticsInformationBinding on InlineSpanSemanticsInformation {
+extension InlineSpanSemanticsInformationBinding
+    on InlineSpanSemanticsInformation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InlineSpanSemanticsInformation');
+        return const HTType('InlineSpanSemanticsInformation');
       case 'text':
         return text;
       case 'semanticsLabel':
@@ -80,7 +90,7 @@ extension InlineSpanSemanticsInformationBinding on InlineSpanSemanticsInformatio
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/matrix_utils.g.dart b/lib/bindings/flutter/painting/matrix_utils.g.dart
index 7ce8037..9add312 100644
--- a/lib/bindings/flutter/painting/matrix_utils.g.dart
+++ b/lib/bindings/flutter/painting/matrix_utils.g.dart
@@ -9,14 +9,17 @@ class MatrixUtilsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MatrixUtils.getAsTranslation':
-        return ({positionalArgs, namedArgs, typeArgs}) => MatrixUtils.getAsTranslation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MatrixUtils.getAsTranslation(positionalArgs[0]);
       case 'MatrixUtils.getAsScale':
-        return ({positionalArgs, namedArgs, typeArgs}) => MatrixUtils.getAsScale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MatrixUtils.getAsScale(positionalArgs[0]);
       case 'MatrixUtils.matrixEquals':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             MatrixUtils.matrixEquals(positionalArgs[0], positionalArgs[1]);
       case 'MatrixUtils.isIdentity':
-        return ({positionalArgs, namedArgs, typeArgs}) => MatrixUtils.isIdentity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MatrixUtils.isIdentity(positionalArgs[0]);
       case 'MatrixUtils.transformPoint':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             MatrixUtils.transformPoint(positionalArgs[0], positionalArgs[1]);
@@ -25,17 +28,27 @@ class MatrixUtilsAutoBinding extends HTExternalClass {
             MatrixUtils.transformRect(positionalArgs[0], positionalArgs[1]);
       case 'MatrixUtils.inverseTransformRect':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            MatrixUtils.inverseTransformRect(positionalArgs[0], positionalArgs[1]);
+            MatrixUtils.inverseTransformRect(
+                positionalArgs[0], positionalArgs[1]);
       case 'MatrixUtils.createCylindricalProjectionTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => MatrixUtils.createCylindricalProjectionTransform(
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            angle: namedArgs.containsKey('angle') ? namedArgs['angle'] : null,
-            perspective: namedArgs.containsKey('perspective') ? namedArgs['perspective'] : 0.001,
-            orientation: namedArgs.containsKey('orientation') ? namedArgs['orientation'] : Axis.vertical);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MatrixUtils.createCylindricalProjectionTransform(
+                radius: namedArgs.containsKey('radius')
+                    ? namedArgs['radius']
+                    : null,
+                angle:
+                    namedArgs.containsKey('angle') ? namedArgs['angle'] : null,
+                perspective: namedArgs.containsKey('perspective')
+                    ? namedArgs['perspective']
+                    : 0.001,
+                orientation: namedArgs.containsKey('orientation')
+                    ? namedArgs['orientation']
+                    : Axis.vertical);
       case 'MatrixUtils.forceToPoint':
-        return ({positionalArgs, namedArgs, typeArgs}) => MatrixUtils.forceToPoint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MatrixUtils.forceToPoint(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -47,12 +60,19 @@ class TransformPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TransformProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => TransformProperty(positionalArgs[0], positionalArgs[1],
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : kNoDefaultValue,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => TransformProperty(
+            positionalArgs[0], positionalArgs[1],
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : kNoDefaultValue,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +86,7 @@ extension TransformPropertyBinding on TransformProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TransformProperty');
+        return const HTType('TransformProperty');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -107,32 +127,48 @@ extension TransformPropertyBinding on TransformProperty {
         return allowTruncate;
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/notched_shapes.g.dart b/lib/bindings/flutter/painting/notched_shapes.g.dart
index cd0bef2..e932f38 100644
--- a/lib/bindings/flutter/painting/notched_shapes.g.dart
+++ b/lib/bindings/flutter/painting/notched_shapes.g.dart
@@ -8,9 +8,10 @@ class CircularNotchedRectangleAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CircularNotchedRectangle':
-        return ({positionalArgs, namedArgs, typeArgs}) => CircularNotchedRectangle();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CircularNotchedRectangle();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,11 +25,12 @@ extension CircularNotchedRectangleBinding on CircularNotchedRectangle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CircularNotchedRectangle');
+        return const HTType('CircularNotchedRectangle');
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getOuterPath(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -40,10 +42,11 @@ class AutomaticNotchedShapeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AutomaticNotchedShape':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            AutomaticNotchedShape(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => AutomaticNotchedShape(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -57,15 +60,16 @@ extension AutomaticNotchedShapeBinding on AutomaticNotchedShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AutomaticNotchedShape');
+        return const HTType('AutomaticNotchedShape');
       case 'host':
         return host;
       case 'guest':
         return guest;
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getOuterPath(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/rounded_rectangle_border.g.dart b/lib/bindings/flutter/painting/rounded_rectangle_border.g.dart
index 0b1a2f7..eabde1d 100644
--- a/lib/bindings/flutter/painting/rounded_rectangle_border.g.dart
+++ b/lib/bindings/flutter/painting/rounded_rectangle_border.g.dart
@@ -8,11 +8,16 @@ class RoundedRectangleBorderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RoundedRectangleBorder':
-        return ({positionalArgs, namedArgs, typeArgs}) => RoundedRectangleBorder(
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : BorderSide.none,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : BorderRadius.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RoundedRectangleBorder(
+                side: namedArgs.containsKey('side')
+                    ? namedArgs['side']
+                    : BorderSide.none,
+                borderRadius: namedArgs.containsKey('borderRadius')
+                    ? namedArgs['borderRadius']
+                    : BorderRadius.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +31,7 @@ extension RoundedRectangleBorderBinding on RoundedRectangleBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoundedRectangleBorder');
+        return const HTType('RoundedRectangleBorder');
       case 'borderRadius':
         return borderRadius;
       case 'side':
@@ -36,28 +41,42 @@ extension RoundedRectangleBorderBinding on RoundedRectangleBorder {
       case 'hashCode':
         return hashCode;
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             side: namedArgs.containsKey('side') ? namedArgs['side'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null);
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null);
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/shader_warm_up.g.dart b/lib/bindings/flutter/painting/shader_warm_up.g.dart
index badf2d9..d8333aa 100644
--- a/lib/bindings/flutter/painting/shader_warm_up.g.dart
+++ b/lib/bindings/flutter/painting/shader_warm_up.g.dart
@@ -10,10 +10,14 @@ class DefaultShaderWarmUpAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DefaultShaderWarmUp':
         return ({positionalArgs, namedArgs, typeArgs}) => DefaultShaderWarmUp(
-            drawCallSpacing: namedArgs.containsKey('drawCallSpacing') ? namedArgs['drawCallSpacing'] : 0.0,
-            canvasSize: namedArgs.containsKey('canvasSize') ? namedArgs['canvasSize'] : const ui.Size(100.0, 100.0));
+            drawCallSpacing: namedArgs.containsKey('drawCallSpacing')
+                ? namedArgs['drawCallSpacing']
+                : 0.0,
+            canvasSize: namedArgs.containsKey('canvasSize')
+                ? namedArgs['canvasSize']
+                : const ui.Size(100.0, 100.0));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +31,7 @@ extension DefaultShaderWarmUpBinding on DefaultShaderWarmUp {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultShaderWarmUp');
+        return const HTType('DefaultShaderWarmUp');
       case 'drawCallSpacing':
         return drawCallSpacing;
       case 'canvasSize':
@@ -35,11 +39,12 @@ extension DefaultShaderWarmUpBinding on DefaultShaderWarmUp {
       case 'size':
         return size;
       case 'warmUpOnCanvas':
-        return ({positionalArgs, namedArgs, typeArgs}) => warmUpOnCanvas(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            warmUpOnCanvas(positionalArgs[0]);
       case 'execute':
         return ({positionalArgs, namedArgs, typeArgs}) => execute();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/shape_decoration.g.dart b/lib/bindings/flutter/painting/shape_decoration.g.dart
index c7ff5f3..da9fa5d 100644
--- a/lib/bindings/flutter/painting/shape_decoration.g.dart
+++ b/lib/bindings/flutter/painting/shape_decoration.g.dart
@@ -12,16 +12,21 @@ class ShapeDecorationAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ShapeDecoration(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            gradient: namedArgs.containsKey('gradient') ? namedArgs['gradient'] : null,
-            shadows: namedArgs.containsKey('shadows') ? List<BoxShadow>.from(namedArgs['shadows']) : null,
+            gradient: namedArgs.containsKey('gradient')
+                ? namedArgs['gradient']
+                : null,
+            shadows: namedArgs.containsKey('shadows')
+                ? List<BoxShadow>.from(namedArgs['shadows'])
+                : null,
             shape: namedArgs['shape']);
       case 'ShapeDecoration.fromBoxDecoration':
-        return ({positionalArgs, namedArgs, typeArgs}) => ShapeDecoration.fromBoxDecoration(positionalArgs[0]);
-      case 'ShapeDecoration.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ShapeDecoration.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            ShapeDecoration.fromBoxDecoration(positionalArgs[0]);
+      case 'ShapeDecoration.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => ShapeDecoration.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +37,8 @@ class ShapeDecorationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -41,7 +47,7 @@ extension ShapeDecorationBinding on ShapeDecoration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShapeDecoration');
+        return const HTType('ShapeDecoration');
       case 'color':
         return color;
       case 'gradient':
@@ -59,32 +65,41 @@ extension ShapeDecorationBinding on ShapeDecoration {
       case 'hashCode':
         return hashCode;
       case 'getClipPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getClipPath(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getClipPath(positionalArgs[0], positionalArgs[1]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpTo(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'createBoxPainter':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createBoxPainter(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createBoxPainter(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/stadium_border.g.dart b/lib/bindings/flutter/painting/stadium_border.g.dart
index 2c080fa..3ade6dd 100644
--- a/lib/bindings/flutter/painting/stadium_border.g.dart
+++ b/lib/bindings/flutter/painting/stadium_border.g.dart
@@ -8,10 +8,12 @@ class StadiumBorderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StadiumBorder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            StadiumBorder(side: namedArgs.containsKey('side') ? namedArgs['side'] : BorderSide.none);
+        return ({positionalArgs, namedArgs, typeArgs}) => StadiumBorder(
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : BorderSide.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +27,7 @@ extension StadiumBorderBinding on StadiumBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StadiumBorder');
+        return const HTType('StadiumBorder');
       case 'side':
         return side;
       case 'dimensions':
@@ -33,27 +35,39 @@ extension StadiumBorderBinding on StadiumBorder {
       case 'hashCode':
         return hashCode;
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'lerpFrom':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpFrom(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerpFrom(positionalArgs[0], positionalArgs[1]);
       case 'lerpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerpTo(positionalArgs[0], positionalArgs[1]);
-      case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            copyWith(side: namedArgs.containsKey('side') ? namedArgs['side'] : null);
+            lerpTo(positionalArgs[0], positionalArgs[1]);
+      case 'copyWith':
+        return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
+            side: namedArgs.containsKey('side') ? namedArgs['side'] : null);
       case 'getInnerPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getInnerPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'getOuterPath':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(positionalArgs[0],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => getOuterPath(
+            positionalArgs[0],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/strut_style.g.dart b/lib/bindings/flutter/painting/strut_style.g.dart
index 6eaa7cc..f02e43c 100644
--- a/lib/bindings/flutter/painting/strut_style.g.dart
+++ b/lib/bindings/flutter/painting/strut_style.g.dart
@@ -10,34 +10,70 @@ class StrutStyleAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'StrutStyle':
         return ({positionalArgs, namedArgs, typeArgs}) => StrutStyle(
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontFamilyFallback:
-                namedArgs.containsKey('fontFamilyFallback') ? List<String>.from(namedArgs['fontFamilyFallback']) : null,
-            fontSize: namedArgs.containsKey('fontSize') ? namedArgs['fontSize'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
-            fontWeight: namedArgs.containsKey('fontWeight') ? namedArgs['fontWeight'] : null,
-            fontStyle: namedArgs.containsKey('fontStyle') ? namedArgs['fontStyle'] : null,
-            forceStrutHeight: namedArgs.containsKey('forceStrutHeight') ? namedArgs['forceStrutHeight'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            package: namedArgs.containsKey('package') ? namedArgs['package'] : null);
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontFamilyFallback: namedArgs.containsKey('fontFamilyFallback')
+                ? List<String>.from(namedArgs['fontFamilyFallback'])
+                : null,
+            fontSize: namedArgs.containsKey('fontSize')
+                ? namedArgs['fontSize']
+                : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            fontWeight: namedArgs.containsKey('fontWeight')
+                ? namedArgs['fontWeight']
+                : null,
+            fontStyle: namedArgs.containsKey('fontStyle')
+                ? namedArgs['fontStyle']
+                : null,
+            forceStrutHeight: namedArgs.containsKey('forceStrutHeight')
+                ? namedArgs['forceStrutHeight']
+                : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
+            package:
+                namedArgs.containsKey('package') ? namedArgs['package'] : null);
       case 'StrutStyle.fromTextStyle':
-        return ({positionalArgs, namedArgs, typeArgs}) => StrutStyle.fromTextStyle(positionalArgs[0],
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontFamilyFallback:
-                namedArgs.containsKey('fontFamilyFallback') ? List<String>.from(namedArgs['fontFamilyFallback']) : null,
-            fontSize: namedArgs.containsKey('fontSize') ? namedArgs['fontSize'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
-            fontWeight: namedArgs.containsKey('fontWeight') ? namedArgs['fontWeight'] : null,
-            fontStyle: namedArgs.containsKey('fontStyle') ? namedArgs['fontStyle'] : null,
-            forceStrutHeight: namedArgs.containsKey('forceStrutHeight') ? namedArgs['forceStrutHeight'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            package: namedArgs.containsKey('package') ? namedArgs['package'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StrutStyle.fromTextStyle(positionalArgs[0],
+                fontFamily: namedArgs.containsKey('fontFamily')
+                    ? namedArgs['fontFamily']
+                    : null,
+                fontFamilyFallback: namedArgs.containsKey('fontFamilyFallback')
+                    ? List<String>.from(namedArgs['fontFamilyFallback'])
+                    : null,
+                fontSize: namedArgs.containsKey('fontSize')
+                    ? namedArgs['fontSize']
+                    : null,
+                height: namedArgs.containsKey('height')
+                    ? namedArgs['height']
+                    : null,
+                leading: namedArgs.containsKey('leading')
+                    ? namedArgs['leading']
+                    : null,
+                fontWeight: namedArgs.containsKey('fontWeight')
+                    ? namedArgs['fontWeight']
+                    : null,
+                fontStyle: namedArgs.containsKey('fontStyle')
+                    ? namedArgs['fontStyle']
+                    : null,
+                forceStrutHeight: namedArgs.containsKey('forceStrutHeight')
+                    ? namedArgs['forceStrutHeight']
+                    : null,
+                debugLabel: namedArgs.containsKey('debugLabel')
+                    ? namedArgs['debugLabel']
+                    : null,
+                package: namedArgs.containsKey('package')
+                    ? namedArgs['package']
+                    : null);
       case 'StrutStyle.disabled':
         return StrutStyle.disabled;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -51,7 +87,7 @@ extension StrutStyleBinding on StrutStyle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StrutStyle');
+        return const HTType('StrutStyle');
       case 'fontFamily':
         return fontFamily;
       case 'fontSize':
@@ -73,23 +109,28 @@ extension StrutStyleBinding on StrutStyle {
       case 'hashCode':
         return hashCode;
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'inheritFromTextStyle':
-        return ({positionalArgs, namedArgs, typeArgs}) => inheritFromTextStyle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inheritFromTextStyle(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            debugFillProperties(positionalArgs[0], prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(
+            positionalArgs[0],
+            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : '');
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/text_painter.g.dart b/lib/bindings/flutter/painting/text_painter.g.dart
index 3d5221c..58184ff 100644
--- a/lib/bindings/flutter/painting/text_painter.g.dart
+++ b/lib/bindings/flutter/painting/text_painter.g.dart
@@ -15,7 +15,7 @@ class TextWidthBasisAutoBinding extends HTExternalClass {
       case 'TextWidthBasis.longestLine':
         return TextWidthBasis.longestLine;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,13 +23,14 @@ class TextWidthBasisAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextWidthBasis');
+        return const HTType('TextWidthBasis');
       case 'index':
         return (instance as TextWidthBasis).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextWidthBasis).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextWidthBasis).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,12 +45,16 @@ class PlaceholderDimensionsAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => PlaceholderDimensions(
             size: namedArgs['size'],
             alignment: namedArgs['alignment'],
-            baseline: namedArgs.containsKey('baseline') ? namedArgs['baseline'] : null,
-            baselineOffset: namedArgs.containsKey('baselineOffset') ? namedArgs['baselineOffset'] : null);
+            baseline: namedArgs.containsKey('baseline')
+                ? namedArgs['baseline']
+                : null,
+            baselineOffset: namedArgs.containsKey('baselineOffset')
+                ? namedArgs['baselineOffset']
+                : null);
       case 'PlaceholderDimensions.empty':
         return PlaceholderDimensions.empty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,7 +68,7 @@ extension PlaceholderDimensionsBinding on PlaceholderDimensions {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlaceholderDimensions');
+        return const HTType('PlaceholderDimensions');
       case 'size':
         return size;
       case 'alignment':
@@ -75,7 +80,7 @@ extension PlaceholderDimensionsBinding on PlaceholderDimensions {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -89,18 +94,34 @@ class TextPainterAutoBinding extends HTExternalClass {
       case 'TextPainter':
         return ({positionalArgs, namedArgs, typeArgs}) => TextPainter(
             text: namedArgs.containsKey('text') ? namedArgs['text'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            ellipsis: namedArgs.containsKey('ellipsis') ? namedArgs['ellipsis'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textWidthBasis:
-                namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : TextWidthBasis.parent,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null);
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            ellipsis: namedArgs.containsKey('ellipsis')
+                ? namedArgs['ellipsis']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : TextWidthBasis.parent,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -119,7 +140,7 @@ extension TextPainterBinding on TextPainter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextPainter');
+        return const HTType('TextPainter');
       case 'text':
         return text;
       case 'textAlign':
@@ -162,39 +183,55 @@ extension TextPainterBinding on TextPainter {
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'setPlaceholderDimensions':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            setPlaceholderDimensions(List<PlaceholderDimensions>.from(positionalArgs[0]));
+            setPlaceholderDimensions(
+                List<PlaceholderDimensions>.from(positionalArgs[0]));
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'layout':
         return ({positionalArgs, namedArgs, typeArgs}) => layout(
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : 0.0,
-            maxWidth: namedArgs.containsKey('maxWidth') ? namedArgs['maxWidth'] : double.infinity);
+            minWidth:
+                namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : 0.0,
+            maxWidth: namedArgs.containsKey('maxWidth')
+                ? namedArgs['maxWidth']
+                : double.infinity);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getOffsetAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getOffsetAfter(positionalArgs[0]);
       case 'getOffsetBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getOffsetBefore(positionalArgs[0]);
       case 'getOffsetForCaret':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetForCaret(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getOffsetForCaret(positionalArgs[0], positionalArgs[1]);
       case 'getFullHeightForCaret':
-        return ({positionalArgs, namedArgs, typeArgs}) => getFullHeightForCaret(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getFullHeightForCaret(positionalArgs[0], positionalArgs[1]);
       case 'getBoxesForSelection':
-        return ({positionalArgs, namedArgs, typeArgs}) => getBoxesForSelection(positionalArgs[0],
-            boxHeightStyle:
-                namedArgs.containsKey('boxHeightStyle') ? namedArgs['boxHeightStyle'] : ui.BoxHeightStyle.tight,
-            boxWidthStyle:
-                namedArgs.containsKey('boxWidthStyle') ? namedArgs['boxWidthStyle'] : ui.BoxWidthStyle.tight);
+        return ({positionalArgs, namedArgs, typeArgs}) => getBoxesForSelection(
+            positionalArgs[0],
+            boxHeightStyle: namedArgs.containsKey('boxHeightStyle')
+                ? namedArgs['boxHeightStyle']
+                : ui.BoxHeightStyle.tight,
+            boxWidthStyle: namedArgs.containsKey('boxWidthStyle')
+                ? namedArgs['boxWidthStyle']
+                : ui.BoxWidthStyle.tight);
       case 'getPositionForOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPositionForOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPositionForOffset(positionalArgs[0]);
       case 'getWordBoundary':
-        return ({positionalArgs, namedArgs, typeArgs}) => getWordBoundary(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getWordBoundary(positionalArgs[0]);
       case 'getLineBoundary':
-        return ({positionalArgs, namedArgs, typeArgs}) => getLineBoundary(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getLineBoundary(positionalArgs[0]);
       case 'computeLineMetrics':
         return ({positionalArgs, namedArgs, typeArgs}) => computeLineMetrics();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -231,7 +268,7 @@ extension TextPainterBinding on TextPainter {
         textHeightBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/text_span.g.dart b/lib/bindings/flutter/painting/text_span.g.dart
index 6ce15c6..649e845 100644
--- a/lib/bindings/flutter/painting/text_span.g.dart
+++ b/lib/bindings/flutter/painting/text_span.g.dart
@@ -11,12 +11,18 @@ class TextSpanAutoBinding extends HTExternalClass {
       case 'TextSpan':
         return ({positionalArgs, namedArgs, typeArgs}) => TextSpan(
             text: namedArgs.containsKey('text') ? namedArgs['text'] : null,
-            children: namedArgs.containsKey('children') ? List<InlineSpan>.from(namedArgs['children']) : null,
+            children: namedArgs.containsKey('children')
+                ? List<InlineSpan>.from(namedArgs['children'])
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            recognizer: namedArgs.containsKey('recognizer') ? namedArgs['recognizer'] : null,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null);
+            recognizer: namedArgs.containsKey('recognizer')
+                ? namedArgs['recognizer']
+                : null,
+            semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                ? namedArgs['semanticsLabel']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,8 +33,8 @@ class TextSpanAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InlineSpanVisitor': (HTFunction function) =>
-          (span) => function.call(positionalArgs: [span], namedArgs: const {}) as bool,
+      'InlineSpanVisitor': (HTFunction function) => (span) =>
+          function.call(positionalArgs: [span], namedArgs: const {}) as bool,
     };
   }
 }
@@ -37,7 +43,7 @@ extension TextSpanBinding on TextSpan {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSpan');
+        return const HTType('TextSpan');
       case 'text':
         return text;
       case 'children':
@@ -51,69 +57,102 @@ extension TextSpanBinding on TextSpan {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0],
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            dimensions:
-                namedArgs.containsKey('dimensions') ? List<PlaceholderDimensions>.from(namedArgs['dimensions']) : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => build(
+            positionalArgs[0],
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            dimensions: namedArgs.containsKey('dimensions')
+                ? List<PlaceholderDimensions>.from(namedArgs['dimensions'])
+                : null);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'getSpanForPositionVisitor':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             getSpanForPositionVisitor(positionalArgs[0], positionalArgs[1]);
       case 'computeToPlainText':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeToPlainText(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => computeToPlainText(
+            positionalArgs[0],
             includeSemanticsLabels:
-                namedArgs.containsKey('includeSemanticsLabels') ? namedArgs['includeSemanticsLabels'] : true,
-            includePlaceholders:
-                namedArgs.containsKey('includePlaceholders') ? namedArgs['includePlaceholders'] : true);
+                namedArgs.containsKey('includeSemanticsLabels')
+                    ? namedArgs['includeSemanticsLabels']
+                    : true,
+            includePlaceholders: namedArgs.containsKey('includePlaceholders')
+                ? namedArgs['includePlaceholders']
+                : true);
       case 'computeSemanticsInformation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            computeSemanticsInformation(List<InlineSpanSemanticsInformation>.from(positionalArgs[0]));
+            computeSemanticsInformation(
+                List<InlineSpanSemanticsInformation>.from(positionalArgs[0]));
       case 'codeUnitAtVisitor':
-        return ({positionalArgs, namedArgs, typeArgs}) => codeUnitAtVisitor(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            codeUnitAtVisitor(positionalArgs[0], positionalArgs[1]);
       case 'describeSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => describeSemantics(
-            positionalArgs[0], List<int>.from(positionalArgs[1]), List<dynamic>.from(positionalArgs[2]));
+            positionalArgs[0],
+            List<int>.from(positionalArgs[1]),
+            List<dynamic>.from(positionalArgs[2]));
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid();
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'getSpanForPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => getSpanForPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getSpanForPosition(positionalArgs[0]);
       case 'toPlainText':
         return ({positionalArgs, namedArgs, typeArgs}) => toPlainText(
             includeSemanticsLabels:
-                namedArgs.containsKey('includeSemanticsLabels') ? namedArgs['includeSemanticsLabels'] : true,
-            includePlaceholders:
-                namedArgs.containsKey('includePlaceholders') ? namedArgs['includePlaceholders'] : true);
+                namedArgs.containsKey('includeSemanticsLabels')
+                    ? namedArgs['includeSemanticsLabels']
+                    : true,
+            includePlaceholders: namedArgs.containsKey('includePlaceholders')
+                ? namedArgs['includePlaceholders']
+                : true);
       case 'getSemanticsInformation':
-        return ({positionalArgs, namedArgs, typeArgs}) => getSemanticsInformation();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getSemanticsInformation();
       case 'codeUnitAt':
-        return ({positionalArgs, namedArgs, typeArgs}) => codeUnitAt(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            codeUnitAt(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/painting/text_style.g.dart b/lib/bindings/flutter/painting/text_style.g.dart
index 4161f9c..0cfbc1e 100644
--- a/lib/bindings/flutter/painting/text_style.g.dart
+++ b/lib/bindings/flutter/painting/text_style.g.dart
@@ -11,36 +11,74 @@ class TextStyleAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TextStyle':
         return ({positionalArgs, namedArgs, typeArgs}) => TextStyle(
-            inherit: namedArgs.containsKey('inherit') ? namedArgs['inherit'] : true,
+            inherit:
+                namedArgs.containsKey('inherit') ? namedArgs['inherit'] : true,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            fontSize: namedArgs.containsKey('fontSize') ? namedArgs['fontSize'] : null,
-            fontWeight: namedArgs.containsKey('fontWeight') ? namedArgs['fontWeight'] : null,
-            fontStyle: namedArgs.containsKey('fontStyle') ? namedArgs['fontStyle'] : null,
-            letterSpacing: namedArgs.containsKey('letterSpacing') ? namedArgs['letterSpacing'] : null,
-            wordSpacing: namedArgs.containsKey('wordSpacing') ? namedArgs['wordSpacing'] : null,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            foreground: namedArgs.containsKey('foreground') ? namedArgs['foreground'] : null,
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : null,
-            shadows: namedArgs.containsKey('shadows') ? List<ui.Shadow>.from(namedArgs['shadows']) : null,
-            fontFeatures:
-                namedArgs.containsKey('fontFeatures') ? List<ui.FontFeature>.from(namedArgs['fontFeatures']) : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            decorationColor: namedArgs.containsKey('decorationColor') ? namedArgs['decorationColor'] : null,
-            decorationStyle: namedArgs.containsKey('decorationStyle') ? namedArgs['decorationStyle'] : null,
-            decorationThickness: namedArgs.containsKey('decorationThickness') ? namedArgs['decorationThickness'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontFamilyFallback:
-                namedArgs.containsKey('fontFamilyFallback') ? List<String>.from(namedArgs['fontFamilyFallback']) : null,
-            package: namedArgs.containsKey('package') ? namedArgs['package'] : null);
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            fontSize: namedArgs.containsKey('fontSize')
+                ? namedArgs['fontSize']
+                : null,
+            fontWeight: namedArgs.containsKey('fontWeight')
+                ? namedArgs['fontWeight']
+                : null,
+            fontStyle: namedArgs.containsKey('fontStyle')
+                ? namedArgs['fontStyle']
+                : null,
+            letterSpacing: namedArgs.containsKey('letterSpacing')
+                ? namedArgs['letterSpacing']
+                : null,
+            wordSpacing: namedArgs.containsKey('wordSpacing')
+                ? namedArgs['wordSpacing']
+                : null,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            foreground: namedArgs.containsKey('foreground')
+                ? namedArgs['foreground']
+                : null,
+            background: namedArgs.containsKey('background')
+                ? namedArgs['background']
+                : null,
+            shadows: namedArgs.containsKey('shadows')
+                ? List<ui.Shadow>.from(namedArgs['shadows'])
+                : null,
+            fontFeatures: namedArgs.containsKey('fontFeatures')
+                ? List<ui.FontFeature>.from(namedArgs['fontFeatures'])
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            decorationColor: namedArgs.containsKey('decorationColor')
+                ? namedArgs['decorationColor']
+                : null,
+            decorationStyle: namedArgs.containsKey('decorationStyle')
+                ? namedArgs['decorationStyle']
+                : null,
+            decorationThickness: namedArgs.containsKey('decorationThickness')
+                ? namedArgs['decorationThickness']
+                : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontFamilyFallback: namedArgs.containsKey('fontFamilyFallback')
+                ? List<String>.from(namedArgs['fontFamilyFallback'])
+                : null,
+            package:
+                namedArgs.containsKey('package') ? namedArgs['package'] : null);
       case 'TextStyle.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextStyle.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => TextStyle.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -54,7 +92,7 @@ extension TextStyleBinding on TextStyle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextStyle');
+        return const HTType('TextStyle');
       case 'inherit':
         return inherit;
       case 'color':
@@ -103,95 +141,195 @@ extension TextStyleBinding on TextStyle {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            inherit: namedArgs.containsKey('inherit') ? namedArgs['inherit'] : null,
+            inherit:
+                namedArgs.containsKey('inherit') ? namedArgs['inherit'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontFamilyFallback:
-                namedArgs.containsKey('fontFamilyFallback') ? List<String>.from(namedArgs['fontFamilyFallback']) : null,
-            fontSize: namedArgs.containsKey('fontSize') ? namedArgs['fontSize'] : null,
-            fontWeight: namedArgs.containsKey('fontWeight') ? namedArgs['fontWeight'] : null,
-            fontStyle: namedArgs.containsKey('fontStyle') ? namedArgs['fontStyle'] : null,
-            letterSpacing: namedArgs.containsKey('letterSpacing') ? namedArgs['letterSpacing'] : null,
-            wordSpacing: namedArgs.containsKey('wordSpacing') ? namedArgs['wordSpacing'] : null,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            foreground: namedArgs.containsKey('foreground') ? namedArgs['foreground'] : null,
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : null,
-            shadows: namedArgs.containsKey('shadows') ? List<ui.Shadow>.from(namedArgs['shadows']) : null,
-            fontFeatures:
-                namedArgs.containsKey('fontFeatures') ? List<ui.FontFeature>.from(namedArgs['fontFeatures']) : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            decorationColor: namedArgs.containsKey('decorationColor') ? namedArgs['decorationColor'] : null,
-            decorationStyle: namedArgs.containsKey('decorationStyle') ? namedArgs['decorationStyle'] : null,
-            decorationThickness: namedArgs.containsKey('decorationThickness') ? namedArgs['decorationThickness'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontFamilyFallback: namedArgs.containsKey('fontFamilyFallback')
+                ? List<String>.from(namedArgs['fontFamilyFallback'])
+                : null,
+            fontSize: namedArgs.containsKey('fontSize')
+                ? namedArgs['fontSize']
+                : null,
+            fontWeight: namedArgs.containsKey('fontWeight')
+                ? namedArgs['fontWeight']
+                : null,
+            fontStyle: namedArgs.containsKey('fontStyle')
+                ? namedArgs['fontStyle']
+                : null,
+            letterSpacing: namedArgs.containsKey('letterSpacing')
+                ? namedArgs['letterSpacing']
+                : null,
+            wordSpacing: namedArgs.containsKey('wordSpacing')
+                ? namedArgs['wordSpacing']
+                : null,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            foreground: namedArgs.containsKey('foreground')
+                ? namedArgs['foreground']
+                : null,
+            background: namedArgs.containsKey('background')
+                ? namedArgs['background']
+                : null,
+            shadows: namedArgs.containsKey('shadows')
+                ? List<ui.Shadow>.from(namedArgs['shadows'])
+                : null,
+            fontFeatures: namedArgs.containsKey('fontFeatures')
+                ? List<ui.FontFeature>.from(namedArgs['fontFeatures'])
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            decorationColor: namedArgs.containsKey('decorationColor')
+                ? namedArgs['decorationColor']
+                : null,
+            decorationStyle: namedArgs.containsKey('decorationStyle')
+                ? namedArgs['decorationStyle']
+                : null,
+            decorationThickness: namedArgs.containsKey('decorationThickness')
+                ? namedArgs['decorationThickness']
+                : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null);
       case 'apply':
         return ({positionalArgs, namedArgs, typeArgs}) => apply(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            decorationColor: namedArgs.containsKey('decorationColor') ? namedArgs['decorationColor'] : null,
-            decorationStyle: namedArgs.containsKey('decorationStyle') ? namedArgs['decorationStyle'] : null,
+            backgroundColor: namedArgs.containsKey('backgroundColor')
+                ? namedArgs['backgroundColor']
+                : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            decorationColor: namedArgs.containsKey('decorationColor')
+                ? namedArgs['decorationColor']
+                : null,
+            decorationStyle: namedArgs.containsKey('decorationStyle')
+                ? namedArgs['decorationStyle']
+                : null,
             decorationThicknessFactor:
-                namedArgs.containsKey('decorationThicknessFactor') ? namedArgs['decorationThicknessFactor'] : 1.0,
-            decorationThicknessDelta:
-                namedArgs.containsKey('decorationThicknessDelta') ? namedArgs['decorationThicknessDelta'] : 0.0,
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontFamilyFallback:
-                namedArgs.containsKey('fontFamilyFallback') ? List<String>.from(namedArgs['fontFamilyFallback']) : null,
-            fontSizeFactor: namedArgs.containsKey('fontSizeFactor') ? namedArgs['fontSizeFactor'] : 1.0,
-            fontSizeDelta: namedArgs.containsKey('fontSizeDelta') ? namedArgs['fontSizeDelta'] : 0.0,
-            fontWeightDelta: namedArgs.containsKey('fontWeightDelta') ? namedArgs['fontWeightDelta'] : 0,
-            fontStyle: namedArgs.containsKey('fontStyle') ? namedArgs['fontStyle'] : null,
-            letterSpacingFactor: namedArgs.containsKey('letterSpacingFactor') ? namedArgs['letterSpacingFactor'] : 1.0,
-            letterSpacingDelta: namedArgs.containsKey('letterSpacingDelta') ? namedArgs['letterSpacingDelta'] : 0.0,
-            wordSpacingFactor: namedArgs.containsKey('wordSpacingFactor') ? namedArgs['wordSpacingFactor'] : 1.0,
-            wordSpacingDelta: namedArgs.containsKey('wordSpacingDelta') ? namedArgs['wordSpacingDelta'] : 0.0,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : 1.0,
-            heightDelta: namedArgs.containsKey('heightDelta') ? namedArgs['heightDelta'] : 0.0,
+                namedArgs.containsKey('decorationThicknessFactor')
+                    ? namedArgs['decorationThicknessFactor']
+                    : 1.0,
+            decorationThicknessDelta: namedArgs.containsKey('decorationThicknessDelta')
+                ? namedArgs['decorationThicknessDelta']
+                : 0.0,
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontFamilyFallback: namedArgs.containsKey('fontFamilyFallback')
+                ? List<String>.from(namedArgs['fontFamilyFallback'])
+                : null,
+            fontSizeFactor: namedArgs.containsKey('fontSizeFactor')
+                ? namedArgs['fontSizeFactor']
+                : 1.0,
+            fontSizeDelta: namedArgs.containsKey('fontSizeDelta')
+                ? namedArgs['fontSizeDelta']
+                : 0.0,
+            fontWeightDelta: namedArgs.containsKey('fontWeightDelta')
+                ? namedArgs['fontWeightDelta']
+                : 0,
+            fontStyle: namedArgs.containsKey('fontStyle')
+                ? namedArgs['fontStyle']
+                : null,
+            letterSpacingFactor: namedArgs.containsKey('letterSpacingFactor')
+                ? namedArgs['letterSpacingFactor']
+                : 1.0,
+            letterSpacingDelta: namedArgs.containsKey('letterSpacingDelta')
+                ? namedArgs['letterSpacingDelta']
+                : 0.0,
+            wordSpacingFactor: namedArgs.containsKey('wordSpacingFactor')
+                ? namedArgs['wordSpacingFactor']
+                : 1.0,
+            wordSpacingDelta: namedArgs.containsKey('wordSpacingDelta')
+                ? namedArgs['wordSpacingDelta']
+                : 0.0,
+            heightFactor: namedArgs.containsKey('heightFactor')
+                ? namedArgs['heightFactor']
+                : 1.0,
+            heightDelta:
+                namedArgs.containsKey('heightDelta') ? namedArgs['heightDelta'] : 0.0,
             textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
             locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
             shadows: namedArgs.containsKey('shadows') ? List<ui.Shadow>.from(namedArgs['shadows']) : null,
-            fontFeatures:
-                namedArgs.containsKey('fontFeatures') ? List<ui.FontFeature>.from(namedArgs['fontFeatures']) : null);
+            fontFeatures: namedArgs.containsKey('fontFeatures') ? List<ui.FontFeature>.from(namedArgs['fontFeatures']) : null);
       case 'merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => merge(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            merge(positionalArgs[0]);
       case 'getTextStyle':
         return ({positionalArgs, namedArgs, typeArgs}) => getTextStyle(
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0);
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0);
       case 'getParagraphStyle':
         return ({positionalArgs, namedArgs, typeArgs}) => getParagraphStyle(
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            ellipsis: namedArgs.containsKey('ellipsis') ? namedArgs['ellipsis'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontSize: namedArgs.containsKey('fontSize') ? namedArgs['fontSize'] : null,
-            fontWeight: namedArgs.containsKey('fontWeight') ? namedArgs['fontWeight'] : null,
-            fontStyle: namedArgs.containsKey('fontStyle') ? namedArgs['fontStyle'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null);
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            ellipsis: namedArgs.containsKey('ellipsis')
+                ? namedArgs['ellipsis']
+                : null,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontSize: namedArgs.containsKey('fontSize')
+                ? namedArgs['fontSize']
+                : null,
+            fontWeight: namedArgs.containsKey('fontWeight')
+                ? namedArgs['fontWeight']
+                : null,
+            fontStyle: namedArgs.containsKey('fontStyle')
+                ? namedArgs['fontStyle']
+                : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null);
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            debugFillProperties(positionalArgs[0], prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(
+            positionalArgs[0],
+            prefix: namedArgs.containsKey('prefix') ? namedArgs['prefix'] : '');
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/physics/clamped_simulation.g.dart b/lib/bindings/flutter/physics/clamped_simulation.g.dart
index 714d33c..d1ed48c 100644
--- a/lib/bindings/flutter/physics/clamped_simulation.g.dart
+++ b/lib/bindings/flutter/physics/clamped_simulation.g.dart
@@ -8,13 +8,22 @@ class ClampedSimulationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ClampedSimulation':
-        return ({positionalArgs, namedArgs, typeArgs}) => ClampedSimulation(positionalArgs[0],
-            xMin: namedArgs.containsKey('xMin') ? namedArgs['xMin'] : double.negativeInfinity,
-            xMax: namedArgs.containsKey('xMax') ? namedArgs['xMax'] : double.infinity,
-            dxMin: namedArgs.containsKey('dxMin') ? namedArgs['dxMin'] : double.negativeInfinity,
-            dxMax: namedArgs.containsKey('dxMax') ? namedArgs['dxMax'] : double.infinity);
+        return ({positionalArgs, namedArgs, typeArgs}) => ClampedSimulation(
+            positionalArgs[0],
+            xMin: namedArgs.containsKey('xMin')
+                ? namedArgs['xMin']
+                : double.negativeInfinity,
+            xMax: namedArgs.containsKey('xMax')
+                ? namedArgs['xMax']
+                : double.infinity,
+            dxMin: namedArgs.containsKey('dxMin')
+                ? namedArgs['dxMin']
+                : double.negativeInfinity,
+            dxMax: namedArgs.containsKey('dxMax')
+                ? namedArgs['dxMax']
+                : double.infinity);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +42,7 @@ extension ClampedSimulationBinding on ClampedSimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClampedSimulation');
+        return const HTType('ClampedSimulation');
       case 'simulation':
         return simulation;
       case 'xMin':
@@ -51,11 +60,12 @@ extension ClampedSimulationBinding on ClampedSimulation {
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -65,7 +75,7 @@ extension ClampedSimulationBinding on ClampedSimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/physics/friction_simulation.g.dart b/lib/bindings/flutter/physics/friction_simulation.g.dart
index 88e7e32..aa07f65 100644
--- a/lib/bindings/flutter/physics/friction_simulation.g.dart
+++ b/lib/bindings/flutter/physics/friction_simulation.g.dart
@@ -10,12 +10,15 @@ class FrictionSimulationAutoBinding extends HTExternalClass {
       case 'FrictionSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) => FrictionSimulation(
             positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            tolerance: namedArgs.containsKey('tolerance') ? namedArgs['tolerance'] : Tolerance.defaultTolerance);
+            tolerance: namedArgs.containsKey('tolerance')
+                ? namedArgs['tolerance']
+                : Tolerance.defaultTolerance);
       case 'FrictionSimulation.through':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FrictionSimulation.through(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            FrictionSimulation.through(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +37,7 @@ extension FrictionSimulationBinding on FrictionSimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FrictionSimulation');
+        return const HTType('FrictionSimulation');
       case 'tolerance':
         return tolerance;
       case 'finalX':
@@ -44,13 +47,15 @@ extension FrictionSimulationBinding on FrictionSimulation {
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'timeAtX':
-        return ({positionalArgs, namedArgs, typeArgs}) => timeAtX(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timeAtX(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -60,7 +65,7 @@ extension FrictionSimulationBinding on FrictionSimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -72,10 +77,11 @@ class BoundedFrictionSimulationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BoundedFrictionSimulation':
-        return ({positionalArgs, namedArgs, typeArgs}) => BoundedFrictionSimulation(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BoundedFrictionSimulation(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3], positionalArgs[4]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -94,7 +100,7 @@ extension BoundedFrictionSimulationBinding on BoundedFrictionSimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoundedFrictionSimulation');
+        return const HTType('BoundedFrictionSimulation');
       case 'tolerance':
         return tolerance;
       case 'finalX':
@@ -102,15 +108,17 @@ extension BoundedFrictionSimulationBinding on BoundedFrictionSimulation {
       case 'x':
         return ({positionalArgs, namedArgs, typeArgs}) => x(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'timeAtX':
-        return ({positionalArgs, namedArgs, typeArgs}) => timeAtX(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            timeAtX(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -120,7 +128,7 @@ extension BoundedFrictionSimulationBinding on BoundedFrictionSimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/physics/gravity_simulation.g.dart b/lib/bindings/flutter/physics/gravity_simulation.g.dart
index 5c0217d..583bf86 100644
--- a/lib/bindings/flutter/physics/gravity_simulation.g.dart
+++ b/lib/bindings/flutter/physics/gravity_simulation.g.dart
@@ -8,10 +8,13 @@ class GravitySimulationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'GravitySimulation':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            GravitySimulation(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => GravitySimulation(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +33,7 @@ extension GravitySimulationBinding on GravitySimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GravitySimulation');
+        return const HTType('GravitySimulation');
       case 'tolerance':
         return tolerance;
       case 'x':
@@ -38,11 +41,12 @@ extension GravitySimulationBinding on GravitySimulation {
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -52,7 +56,7 @@ extension GravitySimulationBinding on GravitySimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/physics/spring_simulation.g.dart b/lib/bindings/flutter/physics/spring_simulation.g.dart
index ec1ed0a..5e6bbbf 100644
--- a/lib/bindings/flutter/physics/spring_simulation.g.dart
+++ b/lib/bindings/flutter/physics/spring_simulation.g.dart
@@ -16,7 +16,7 @@ class SpringTypeAutoBinding extends HTExternalClass {
       case 'SpringType.overDamped':
         return SpringType.overDamped;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class SpringTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SpringType');
+        return const HTType('SpringType');
       case 'index':
         return (instance as SpringType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SpringType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SpringType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -43,14 +44,18 @@ class SpringDescriptionAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SpringDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => SpringDescription(
-            mass: namedArgs['mass'], stiffness: namedArgs['stiffness'], damping: namedArgs['damping']);
-      case 'SpringDescription.withDampingRatio':
-        return ({positionalArgs, namedArgs, typeArgs}) => SpringDescription.withDampingRatio(
             mass: namedArgs['mass'],
             stiffness: namedArgs['stiffness'],
-            ratio: namedArgs.containsKey('ratio') ? namedArgs['ratio'] : 1.0);
+            damping: namedArgs['damping']);
+      case 'SpringDescription.withDampingRatio':
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SpringDescription.withDampingRatio(
+                mass: namedArgs['mass'],
+                stiffness: namedArgs['stiffness'],
+                ratio:
+                    namedArgs.containsKey('ratio') ? namedArgs['ratio'] : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -64,7 +69,7 @@ extension SpringDescriptionBinding on SpringDescription {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SpringDescription');
+        return const HTType('SpringDescription');
       case 'mass':
         return mass;
       case 'stiffness':
@@ -74,7 +79,7 @@ extension SpringDescriptionBinding on SpringDescription {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -87,10 +92,15 @@ class SpringSimulationAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SpringSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) => SpringSimulation(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3],
-            tolerance: namedArgs.containsKey('tolerance') ? namedArgs['tolerance'] : Tolerance.defaultTolerance);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            tolerance: namedArgs.containsKey('tolerance')
+                ? namedArgs['tolerance']
+                : Tolerance.defaultTolerance);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -109,7 +119,7 @@ extension SpringSimulationBinding on SpringSimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SpringSimulation');
+        return const HTType('SpringSimulation');
       case 'tolerance':
         return tolerance;
       case 'type':
@@ -119,11 +129,12 @@ extension SpringSimulationBinding on SpringSimulation {
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -133,7 +144,7 @@ extension SpringSimulationBinding on SpringSimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -145,11 +156,14 @@ class ScrollSpringSimulationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScrollSpringSimulation':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScrollSpringSimulation(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3],
-            tolerance: namedArgs.containsKey('tolerance') ? namedArgs['tolerance'] : Tolerance.defaultTolerance);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScrollSpringSimulation(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3],
+                tolerance: namedArgs.containsKey('tolerance')
+                    ? namedArgs['tolerance']
+                    : Tolerance.defaultTolerance);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -168,7 +182,7 @@ extension ScrollSpringSimulationBinding on ScrollSpringSimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollSpringSimulation');
+        return const HTType('ScrollSpringSimulation');
       case 'tolerance':
         return tolerance;
       case 'type':
@@ -178,11 +192,12 @@ extension ScrollSpringSimulationBinding on ScrollSpringSimulation {
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -192,7 +207,7 @@ extension ScrollSpringSimulationBinding on ScrollSpringSimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/physics/tolerance.g.dart b/lib/bindings/flutter/physics/tolerance.g.dart
index 178621c..01ae822 100644
--- a/lib/bindings/flutter/physics/tolerance.g.dart
+++ b/lib/bindings/flutter/physics/tolerance.g.dart
@@ -9,13 +9,19 @@ class ToleranceAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'Tolerance':
         return ({positionalArgs, namedArgs, typeArgs}) => Tolerance(
-            distance: namedArgs.containsKey('distance') ? namedArgs['distance'] : _epsilonDefault,
-            time: namedArgs.containsKey('time') ? namedArgs['time'] : _epsilonDefault,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : _epsilonDefault);
+            distance: namedArgs.containsKey('distance')
+                ? namedArgs['distance']
+                : _epsilonDefault,
+            time: namedArgs.containsKey('time')
+                ? namedArgs['time']
+                : _epsilonDefault,
+            velocity: namedArgs.containsKey('velocity')
+                ? namedArgs['velocity']
+                : _epsilonDefault);
       case 'Tolerance.defaultTolerance':
         return Tolerance.defaultTolerance;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +37,7 @@ extension ToleranceBinding on Tolerance {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Tolerance');
+        return const HTType('Tolerance');
       case 'distance':
         return distance;
       case 'time':
@@ -41,7 +47,7 @@ extension ToleranceBinding on Tolerance {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/animated_size.g.dart b/lib/bindings/flutter/rendering/animated_size.g.dart
index a4f36ce..2b278ba 100644
--- a/lib/bindings/flutter/rendering/animated_size.g.dart
+++ b/lib/bindings/flutter/rendering/animated_size.g.dart
@@ -13,14 +13,24 @@ class RenderAnimatedSizeAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RenderAnimatedSize(
             vsync: namedArgs['vsync'],
             duration: namedArgs['duration'],
-            reverseDuration: namedArgs.containsKey('reverseDuration') ? namedArgs['reverseDuration'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            reverseDuration: namedArgs.containsKey('reverseDuration')
+                ? namedArgs['reverseDuration']
+                : null,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,8 +46,8 @@ class RenderAnimatedSizeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -46,7 +56,7 @@ extension RenderAnimatedSizeBinding on RenderAnimatedSize {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderAnimatedSize');
+        return const HTType('RenderAnimatedSize');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -114,158 +124,247 @@ extension RenderAnimatedSizeBinding on RenderAnimatedSize {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -293,7 +392,7 @@ extension RenderAnimatedSizeBinding on RenderAnimatedSize {
         vsync = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/binding.g.dart b/lib/bindings/flutter/rendering/binding.g.dart
index e160508..5fef7c2 100644
--- a/lib/bindings/flutter/rendering/binding.g.dart
+++ b/lib/bindings/flutter/rendering/binding.g.dart
@@ -9,9 +9,10 @@ class RenderingFlutterBindingAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderingFlutterBinding':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderingFlutterBinding(root: namedArgs.containsKey('root') ? namedArgs['root'] : null);
+            RenderingFlutterBinding(
+                root: namedArgs.containsKey('root') ? namedArgs['root'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,10 +23,10 @@ class RenderingFlutterBindingAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TimingsCallback': (HTFunction function) =>
-          (timings) => function.call(positionalArgs: [timings], namedArgs: const {}),
-      'FrameCallback': (HTFunction function) =>
-          (timeStamp) => function.call(positionalArgs: [timeStamp], namedArgs: const {}),
+      'TimingsCallback': (HTFunction function) => (timings) =>
+          function.call(positionalArgs: [timings], namedArgs: const {}),
+      'FrameCallback': (HTFunction function) => (timeStamp) =>
+          function.call(positionalArgs: [timeStamp], namedArgs: const {}),
     };
   }
 }
@@ -34,7 +35,7 @@ extension RenderingFlutterBindingBinding on RenderingFlutterBinding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderingFlutterBinding');
+        return const HTType('RenderingFlutterBinding');
       case 'lifecycleState':
         return lifecycleState;
       case 'transientCallbackCount':
@@ -78,36 +79,54 @@ extension RenderingFlutterBindingBinding on RenderingFlutterBinding {
       case 'unlocked':
         return ({positionalArgs, namedArgs, typeArgs}) => unlocked();
       case 'cancelPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => cancelPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            cancelPointer(positionalArgs[0]);
       case 'handlePointerEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handlePointerEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handlePointerEvent(positionalArgs[0]);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTest(positionalArgs[0], positionalArgs[1]);
       case 'dispatchEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatchEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatchEvent(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'addTimingsCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addTimingsCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addTimingsCallback(positionalArgs[0]);
       case 'removeTimingsCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeTimingsCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeTimingsCallback(positionalArgs[0]);
       case 'initServiceExtensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => initServiceExtensions();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initServiceExtensions();
       case 'scheduleTask':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleTask(positionalArgs[0], positionalArgs[1],
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => scheduleTask(
+            positionalArgs[0], positionalArgs[1],
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
             flow: namedArgs.containsKey('flow') ? namedArgs['flow'] : null);
       case 'scheduleFrameCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleFrameCallback(positionalArgs[0],
-            rescheduling: namedArgs.containsKey('rescheduling') ? namedArgs['rescheduling'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => scheduleFrameCallback(
+            positionalArgs[0],
+            rescheduling: namedArgs.containsKey('rescheduling')
+                ? namedArgs['rescheduling']
+                : false);
       case 'cancelFrameCallbackWithId':
-        return ({positionalArgs, namedArgs, typeArgs}) => cancelFrameCallbackWithId(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            cancelFrameCallbackWithId(positionalArgs[0]);
       case 'debugAssertNoTransientCallbacks':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertNoTransientCallbacks(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertNoTransientCallbacks(positionalArgs[0]);
       case 'addPersistentFrameCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPersistentFrameCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPersistentFrameCallback(positionalArgs[0]);
       case 'addPostFrameCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPostFrameCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPostFrameCallback(positionalArgs[0]);
       case 'ensureVisualUpdate':
         return ({positionalArgs, namedArgs, typeArgs}) => ensureVisualUpdate();
       case 'scheduleFrame':
@@ -119,22 +138,33 @@ extension RenderingFlutterBindingBinding on RenderingFlutterBinding {
       case 'resetEpoch':
         return ({positionalArgs, namedArgs, typeArgs}) => resetEpoch();
       case 'handleBeginFrame':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleBeginFrame(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleBeginFrame(positionalArgs[0]);
       case 'handleDrawFrame':
         return ({positionalArgs, namedArgs, typeArgs}) => handleDrawFrame();
       case 'createSemanticsUpdateBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => createSemanticsUpdateBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createSemanticsUpdateBuilder();
       case 'instantiateImageCodec':
-        return ({positionalArgs, namedArgs, typeArgs}) => instantiateImageCodec(positionalArgs[0],
-            cacheWidth: namedArgs.containsKey('cacheWidth') ? namedArgs['cacheWidth'] : null,
-            cacheHeight: namedArgs.containsKey('cacheHeight') ? namedArgs['cacheHeight'] : null,
-            allowUpscaling: namedArgs.containsKey('allowUpscaling') ? namedArgs['allowUpscaling'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => instantiateImageCodec(
+            positionalArgs[0],
+            cacheWidth: namedArgs.containsKey('cacheWidth')
+                ? namedArgs['cacheWidth']
+                : null,
+            cacheHeight: namedArgs.containsKey('cacheHeight')
+                ? namedArgs['cacheHeight']
+                : null,
+            allowUpscaling: namedArgs.containsKey('allowUpscaling')
+                ? namedArgs['allowUpscaling']
+                : false);
       case 'initRenderView':
         return ({positionalArgs, namedArgs, typeArgs}) => initRenderView();
       case 'createViewConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => createViewConfiguration();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createViewConfiguration();
       case 'setSemanticsEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => setSemanticsEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setSemanticsEnabled(positionalArgs[0]);
       case 'deferFirstFrame':
         return ({positionalArgs, namedArgs, typeArgs}) => deferFirstFrame();
       case 'allowFirstFrame':
@@ -144,11 +174,12 @@ extension RenderingFlutterBindingBinding on RenderingFlutterBinding {
       case 'performReassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => performReassemble();
       case 'reassembleApplication':
-        return ({positionalArgs, namedArgs, typeArgs}) => reassembleApplication();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            reassembleApplication();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/box.g.dart b/lib/bindings/flutter/rendering/box.g.dart
index 57b171e..008b49e 100644
--- a/lib/bindings/flutter/rendering/box.g.dart
+++ b/lib/bindings/flutter/rendering/box.g.dart
@@ -10,31 +10,50 @@ class BoxConstraintsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'BoxConstraints':
         return ({positionalArgs, namedArgs, typeArgs}) => BoxConstraints(
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : 0.0,
-            maxWidth: namedArgs.containsKey('maxWidth') ? namedArgs['maxWidth'] : double.infinity,
-            minHeight: namedArgs.containsKey('minHeight') ? namedArgs['minHeight'] : 0.0,
-            maxHeight: namedArgs.containsKey('maxHeight') ? namedArgs['maxHeight'] : double.infinity);
+            minWidth:
+                namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : 0.0,
+            maxWidth: namedArgs.containsKey('maxWidth')
+                ? namedArgs['maxWidth']
+                : double.infinity,
+            minHeight: namedArgs.containsKey('minHeight')
+                ? namedArgs['minHeight']
+                : 0.0,
+            maxHeight: namedArgs.containsKey('maxHeight')
+                ? namedArgs['maxHeight']
+                : double.infinity);
       case 'BoxConstraints.tight':
-        return ({positionalArgs, namedArgs, typeArgs}) => BoxConstraints.tight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BoxConstraints.tight(positionalArgs[0]);
       case 'BoxConstraints.tightFor':
-        return ({positionalArgs, namedArgs, typeArgs}) => BoxConstraints.tightFor(
-            width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BoxConstraints.tightFor(
+                width:
+                    namedArgs.containsKey('width') ? namedArgs['width'] : null,
+                height: namedArgs.containsKey('height')
+                    ? namedArgs['height']
+                    : null);
       case 'BoxConstraints.tightForFinite':
-        return ({positionalArgs, namedArgs, typeArgs}) => BoxConstraints.tightForFinite(
-            width: namedArgs.containsKey('width') ? namedArgs['width'] : double.infinity,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : double.infinity);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BoxConstraints.tightForFinite(
+                width: namedArgs.containsKey('width')
+                    ? namedArgs['width']
+                    : double.infinity,
+                height: namedArgs.containsKey('height')
+                    ? namedArgs['height']
+                    : double.infinity);
       case 'BoxConstraints.loose':
-        return ({positionalArgs, namedArgs, typeArgs}) => BoxConstraints.loose(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BoxConstraints.loose(positionalArgs[0]);
       case 'BoxConstraints.expand':
         return ({positionalArgs, namedArgs, typeArgs}) => BoxConstraints.expand(
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null);
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null);
       case 'BoxConstraints.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BoxConstraints.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => BoxConstraints.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,8 +64,9 @@ class BoxConstraintsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InformationCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Iterable<DiagnosticsNode>,
+      'InformationCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Iterable<DiagnosticsNode>,
     };
   }
 }
@@ -55,7 +75,7 @@ extension BoxConstraintsBinding on BoxConstraints {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxConstraints');
+        return const HTType('BoxConstraints');
       case 'minWidth':
         return minWidth;
       case 'maxWidth':
@@ -90,51 +110,67 @@ extension BoxConstraintsBinding on BoxConstraints {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : null,
-            maxWidth: namedArgs.containsKey('maxWidth') ? namedArgs['maxWidth'] : null,
-            minHeight: namedArgs.containsKey('minHeight') ? namedArgs['minHeight'] : null,
-            maxHeight: namedArgs.containsKey('maxHeight') ? namedArgs['maxHeight'] : null);
+            minWidth: namedArgs.containsKey('minWidth')
+                ? namedArgs['minWidth']
+                : null,
+            maxWidth: namedArgs.containsKey('maxWidth')
+                ? namedArgs['maxWidth']
+                : null,
+            minHeight: namedArgs.containsKey('minHeight')
+                ? namedArgs['minHeight']
+                : null,
+            maxHeight: namedArgs.containsKey('maxHeight')
+                ? namedArgs['maxHeight']
+                : null);
       case 'deflate':
-        return ({positionalArgs, namedArgs, typeArgs}) => deflate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deflate(positionalArgs[0]);
       case 'loosen':
         return ({positionalArgs, namedArgs, typeArgs}) => loosen();
       case 'enforce':
-        return ({positionalArgs, namedArgs, typeArgs}) => enforce(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            enforce(positionalArgs[0]);
       case 'tighten':
         return ({positionalArgs, namedArgs, typeArgs}) => tighten(
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null);
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null);
       case 'widthConstraints':
         return ({positionalArgs, namedArgs, typeArgs}) => widthConstraints();
       case 'heightConstraints':
         return ({positionalArgs, namedArgs, typeArgs}) => heightConstraints();
       case 'constrainWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            constrainWidth(positionalArgs.length > 0 ? positionalArgs[0] : double.infinity);
+        return ({positionalArgs, namedArgs, typeArgs}) => constrainWidth(
+            positionalArgs.length > 0 ? positionalArgs[0] : double.infinity);
       case 'constrainHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            constrainHeight(positionalArgs.length > 0 ? positionalArgs[0] : double.infinity);
+        return ({positionalArgs, namedArgs, typeArgs}) => constrainHeight(
+            positionalArgs.length > 0 ? positionalArgs[0] : double.infinity);
       case 'constrain':
-        return ({positionalArgs, namedArgs, typeArgs}) => constrain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            constrain(positionalArgs[0]);
       case 'constrainDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => constrainDimensions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            constrainDimensions(positionalArgs[0], positionalArgs[1]);
       case 'constrainSizeAndAttemptToPreserveAspectRatio':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             constrainSizeAndAttemptToPreserveAspectRatio(positionalArgs[0]);
       case 'isSatisfiedBy':
-        return ({positionalArgs, namedArgs, typeArgs}) => isSatisfiedBy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isSatisfiedBy(positionalArgs[0]);
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid(
-            isAppliedConstraint:
-                namedArgs.containsKey('isAppliedConstraint') ? namedArgs['isAppliedConstraint'] : false,
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null);
+            isAppliedConstraint: namedArgs.containsKey('isAppliedConstraint')
+                ? namedArgs['isAppliedConstraint']
+                : false,
+            informationCollector: namedArgs.containsKey('informationCollector')
+                ? namedArgs['informationCollector']
+                : null);
       case 'normalize':
         return ({positionalArgs, namedArgs, typeArgs}) => normalize();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -148,9 +184,10 @@ class BoxHitTestResultAutoBinding extends HTExternalClass {
       case 'BoxHitTestResult':
         return ({positionalArgs, namedArgs, typeArgs}) => BoxHitTestResult();
       case 'BoxHitTestResult.wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => BoxHitTestResult.wrap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BoxHitTestResult.wrap(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -161,10 +198,11 @@ class BoxHitTestResultAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'BoxHitTest': (HTFunction function) =>
-          (result, position) => function.call(positionalArgs: [result, position], namedArgs: const {}) as bool,
-      'BoxHitTestWithOutOfBandPosition': (HTFunction function) =>
-          (result) => function.call(positionalArgs: [result], namedArgs: const {}) as bool,
+      'BoxHitTest': (HTFunction function) => (result, position) =>
+          function.call(positionalArgs: [result, position], namedArgs: const {})
+              as bool,
+      'BoxHitTestWithOutOfBandPosition': (HTFunction function) => (result) =>
+          function.call(positionalArgs: [result], namedArgs: const {}) as bool,
     };
   }
 }
@@ -173,36 +211,60 @@ extension BoxHitTestResultBinding on BoxHitTestResult {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxHitTestResult');
+        return const HTType('BoxHitTestResult');
       case 'path':
         return path;
       case 'addWithPaintTransform':
         return ({positionalArgs, namedArgs, typeArgs}) => addWithPaintTransform(
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
-            hitTest: namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
+            hitTest:
+                namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
       case 'addWithPaintOffset':
         return ({positionalArgs, namedArgs, typeArgs}) => addWithPaintOffset(
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
-            hitTest: namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
+            offset:
+                namedArgs.containsKey('offset') ? namedArgs['offset'] : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
+            hitTest:
+                namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
       case 'addWithRawTransform':
         return ({positionalArgs, namedArgs, typeArgs}) => addWithRawTransform(
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null,
-            hitTest: namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null,
+            hitTest:
+                namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
       case 'addWithOutOfBandPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => addWithOutOfBandPosition(
-            paintOffset: namedArgs.containsKey('paintOffset') ? namedArgs['paintOffset'] : null,
-            paintTransform: namedArgs.containsKey('paintTransform') ? namedArgs['paintTransform'] : null,
-            rawTransform: namedArgs.containsKey('rawTransform') ? namedArgs['rawTransform'] : null,
-            hitTest: namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addWithOutOfBandPosition(
+                paintOffset: namedArgs.containsKey('paintOffset')
+                    ? namedArgs['paintOffset']
+                    : null,
+                paintTransform: namedArgs.containsKey('paintTransform')
+                    ? namedArgs['paintTransform']
+                    : null,
+                rawTransform: namedArgs.containsKey('rawTransform')
+                    ? namedArgs['rawTransform']
+                    : null,
+                hitTest: namedArgs.containsKey('hitTest')
+                    ? namedArgs['hitTest']
+                    : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -214,9 +276,10 @@ class BoxHitTestEntryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BoxHitTestEntry':
-        return ({positionalArgs, namedArgs, typeArgs}) => BoxHitTestEntry(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BoxHitTestEntry(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -230,7 +293,7 @@ extension BoxHitTestEntryBinding on BoxHitTestEntry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxHitTestEntry');
+        return const HTType('BoxHitTestEntry');
       case 'localPosition':
         return localPosition;
       case 'target':
@@ -240,7 +303,7 @@ extension BoxHitTestEntryBinding on BoxHitTestEntry {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -254,7 +317,7 @@ class BoxParentDataAutoBinding extends HTExternalClass {
       case 'BoxParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => BoxParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -273,13 +336,13 @@ extension BoxParentDataBinding on BoxParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxParentData');
+        return const HTType('BoxParentData');
       case 'offset':
         return offset;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -289,7 +352,7 @@ extension BoxParentDataBinding on BoxParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/custom_layout.g.dart b/lib/bindings/flutter/rendering/custom_layout.g.dart
index 7288b9a..6e56928 100644
--- a/lib/bindings/flutter/rendering/custom_layout.g.dart
+++ b/lib/bindings/flutter/rendering/custom_layout.g.dart
@@ -10,9 +10,10 @@ class MultiChildLayoutParentDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MultiChildLayoutParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => MultiChildLayoutParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MultiChildLayoutParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +32,7 @@ extension MultiChildLayoutParentDataBinding on MultiChildLayoutParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MultiChildLayoutParentData');
+        return const HTType('MultiChildLayoutParentData');
       case 'id':
         return id;
       case 'offset':
@@ -41,7 +42,7 @@ extension MultiChildLayoutParentDataBinding on MultiChildLayoutParentData {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -54,23 +55,27 @@ extension MultiChildLayoutParentDataBinding on MultiChildLayoutParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderCustomMultiChildLayoutBoxAutoBinding extends HTExternalClass {
-  RenderCustomMultiChildLayoutBoxAutoBinding() : super('RenderCustomMultiChildLayoutBox');
+  RenderCustomMultiChildLayoutBoxAutoBinding()
+      : super('RenderCustomMultiChildLayoutBox');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderCustomMultiChildLayoutBox':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderCustomMultiChildLayoutBox(
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null,
-            delegate: namedArgs['delegate']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderCustomMultiChildLayoutBox(
+                children: namedArgs.containsKey('children')
+                    ? List<RenderBox>.from(namedArgs['children'])
+                    : null,
+                delegate: namedArgs['delegate']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -86,17 +91,18 @@ class RenderCustomMultiChildLayoutBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
 
-extension RenderCustomMultiChildLayoutBoxBinding on RenderCustomMultiChildLayoutBox {
+extension RenderCustomMultiChildLayoutBoxBinding
+    on RenderCustomMultiChildLayoutBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderCustomMultiChildLayoutBox');
+        return const HTType('RenderCustomMultiChildLayoutBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -150,54 +156,75 @@ extension RenderCustomMultiChildLayoutBoxBinding on RenderCustomMultiChildLayout
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -205,136 +232,214 @@ extension RenderCustomMultiChildLayoutBoxBinding on RenderCustomMultiChildLayout
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -350,7 +455,7 @@ extension RenderCustomMultiChildLayoutBoxBinding on RenderCustomMultiChildLayout
         delegate = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/custom_paint.g.dart b/lib/bindings/flutter/rendering/custom_paint.g.dart
index 3679ca3..7b0ccef 100644
--- a/lib/bindings/flutter/rendering/custom_paint.g.dart
+++ b/lib/bindings/flutter/rendering/custom_paint.g.dart
@@ -10,14 +10,17 @@ class CustomPainterSemanticsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CustomPainterSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => CustomPainterSemantics(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            rect: namedArgs['rect'],
-            properties: namedArgs['properties'],
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            tags: namedArgs.containsKey('tags') ? namedArgs['tags'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CustomPainterSemantics(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                rect: namedArgs['rect'],
+                properties: namedArgs['properties'],
+                transform: namedArgs.containsKey('transform')
+                    ? namedArgs['transform']
+                    : null,
+                tags: namedArgs.containsKey('tags') ? namedArgs['tags'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +34,7 @@ extension CustomPainterSemanticsBinding on CustomPainterSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CustomPainterSemantics');
+        return const HTType('CustomPainterSemantics');
       case 'key':
         return key;
       case 'rect':
@@ -43,7 +46,7 @@ extension CustomPainterSemanticsBinding on CustomPainterSemantics {
       case 'tags':
         return tags;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -56,14 +59,23 @@ class RenderCustomPaintAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderCustomPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderCustomPaint(
-            painter: namedArgs.containsKey('painter') ? namedArgs['painter'] : null,
-            foregroundPainter: namedArgs.containsKey('foregroundPainter') ? namedArgs['foregroundPainter'] : null,
-            preferredSize: namedArgs.containsKey('preferredSize') ? namedArgs['preferredSize'] : Size.zero,
-            isComplex: namedArgs.containsKey('isComplex') ? namedArgs['isComplex'] : false,
-            willChange: namedArgs.containsKey('willChange') ? namedArgs['willChange'] : false,
+            painter:
+                namedArgs.containsKey('painter') ? namedArgs['painter'] : null,
+            foregroundPainter: namedArgs.containsKey('foregroundPainter')
+                ? namedArgs['foregroundPainter']
+                : null,
+            preferredSize: namedArgs.containsKey('preferredSize')
+                ? namedArgs['preferredSize']
+                : Size.zero,
+            isComplex: namedArgs.containsKey('isComplex')
+                ? namedArgs['isComplex']
+                : false,
+            willChange: namedArgs.containsKey('willChange')
+                ? namedArgs['willChange']
+                : false,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -79,8 +91,8 @@ class RenderCustomPaintAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -89,7 +101,7 @@ extension RenderCustomPaintBinding on RenderCustomPaint {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderCustomPaint');
+        return const HTType('RenderCustomPaint');
       case 'isComplex':
         return isComplex;
       case 'willChange':
@@ -147,168 +159,260 @@ extension RenderCustomPaintBinding on RenderCustomPaint {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            describeSemanticsConfiguration(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -336,7 +440,7 @@ extension RenderCustomPaintBinding on RenderCustomPaint {
         preferredSize = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/editable.g.dart b/lib/bindings/flutter/rendering/editable.g.dart
index 694cfec..5d8860a 100644
--- a/lib/bindings/flutter/rendering/editable.g.dart
+++ b/lib/bindings/flutter/rendering/editable.g.dart
@@ -25,7 +25,7 @@ class SelectionChangedCauseAutoBinding extends HTExternalClass {
       case 'SelectionChangedCause.drag':
         return SelectionChangedCause.drag;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,13 +33,14 @@ class SelectionChangedCauseAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SelectionChangedCause');
+        return const HTType('SelectionChangedCause');
       case 'index':
         return (instance as SelectionChangedCause).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SelectionChangedCause).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SelectionChangedCause).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,9 +52,10 @@ class TextSelectionPointAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextSelectionPoint':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelectionPoint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelectionPoint(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,7 +69,7 @@ extension TextSelectionPointBinding on TextSelectionPoint {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionPoint');
+        return const HTType('TextSelectionPoint');
       case 'point':
         return point;
       case 'direction':
@@ -75,7 +77,7 @@ extension TextSelectionPointBinding on TextSelectionPoint {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,57 +92,92 @@ class RenderEditableAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RenderEditable(
             text: namedArgs.containsKey('text') ? namedArgs['text'] : null,
             textDirection: namedArgs['textDirection'],
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            cursorColor: namedArgs.containsKey('cursorColor') ? namedArgs['cursorColor'] : null,
-            backgroundCursorColor:
-                namedArgs.containsKey('backgroundCursorColor') ? namedArgs['backgroundCursorColor'] : null,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : null,
-            hasFocus: namedArgs.containsKey('hasFocus') ? namedArgs['hasFocus'] : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            cursorColor: namedArgs.containsKey('cursorColor')
+                ? namedArgs['cursorColor']
+                : null,
+            backgroundCursorColor: namedArgs.containsKey('backgroundCursorColor')
+                ? namedArgs['backgroundCursorColor']
+                : null,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : null,
+            hasFocus: namedArgs.containsKey('hasFocus')
+                ? namedArgs['hasFocus']
+                : null,
             startHandleLayerLink: namedArgs['startHandleLayerLink'],
             endHandleLayerLink: namedArgs['endHandleLayerLink'],
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            expands: namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            selectionColor: namedArgs.containsKey('selectionColor') ? namedArgs['selectionColor'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            selection: namedArgs.containsKey('selection') ? namedArgs['selection'] : null,
+            maxLines:
+                namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            expands:
+                namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            selectionColor: namedArgs.containsKey('selectionColor')
+                ? namedArgs['selectionColor']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            selection: namedArgs.containsKey('selection')
+                ? namedArgs['selection']
+                : null,
             offset: namedArgs['offset'],
-            onSelectionChanged: namedArgs.containsKey('onSelectionChanged') ? namedArgs['onSelectionChanged'] : null,
-            onCaretChanged: namedArgs.containsKey('onCaretChanged') ? namedArgs['onCaretChanged'] : null,
-            ignorePointer: namedArgs.containsKey('ignorePointer') ? namedArgs['ignorePointer'] : false,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            forceLine: namedArgs.containsKey('forceLine') ? namedArgs['forceLine'] : true,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            textWidthBasis:
-                namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : TextWidthBasis.parent,
-            obscuringCharacter: namedArgs.containsKey('obscuringCharacter') ? namedArgs['obscuringCharacter'] : '•',
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 1.0,
-            cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
+            onSelectionChanged: namedArgs.containsKey('onSelectionChanged')
+                ? namedArgs['onSelectionChanged']
+                : null,
+            onCaretChanged: namedArgs.containsKey('onCaretChanged')
+                ? namedArgs['onCaretChanged']
+                : null,
+            ignorePointer: namedArgs.containsKey('ignorePointer')
+                ? namedArgs['ignorePointer']
+                : false,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : false,
+            forceLine: namedArgs.containsKey('forceLine')
+                ? namedArgs['forceLine']
+                : true,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : TextWidthBasis.parent,
+            obscuringCharacter: namedArgs.containsKey('obscuringCharacter')
+                ? namedArgs['obscuringCharacter']
+                : '•',
+            obscureText: namedArgs.containsKey('obscureText')
+                ? namedArgs['obscureText']
+                : false,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            cursorWidth: namedArgs.containsKey('cursorWidth')
+                ? namedArgs['cursorWidth']
+                : 1.0,
+            cursorHeight: namedArgs.containsKey('cursorHeight')
+                ? namedArgs['cursorHeight']
+                : null,
             cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : null,
-            paintCursorAboveText:
-                namedArgs.containsKey('paintCursorAboveText') ? namedArgs['paintCursorAboveText'] : false,
+            paintCursorAboveText: namedArgs.containsKey('paintCursorAboveText') ? namedArgs['paintCursorAboveText'] : false,
             cursorOffset: namedArgs.containsKey('cursorOffset') ? namedArgs['cursorOffset'] : null,
             devicePixelRatio: namedArgs.containsKey('devicePixelRatio') ? namedArgs['devicePixelRatio'] : 1.0,
-            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle')
-                ? namedArgs['selectionHeightStyle']
-                : ui.BoxHeightStyle.tight,
-            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle')
-                ? namedArgs['selectionWidthStyle']
-                : ui.BoxWidthStyle.tight,
-            enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : null,
-            floatingCursorAddedMargin: namedArgs.containsKey('floatingCursorAddedMargin')
-                ? namedArgs['floatingCursorAddedMargin']
-                : const EdgeInsets.fromLTRB(4, 4, 4, 5),
+            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle') ? namedArgs['selectionHeightStyle'] : ui.BoxHeightStyle.tight,
+            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle') ? namedArgs['selectionWidthStyle'] : ui.BoxWidthStyle.tight,
+            enableInteractiveSelection: namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : null,
+            floatingCursorAddedMargin: namedArgs.containsKey('floatingCursorAddedMargin') ? namedArgs['floatingCursorAddedMargin'] : const EdgeInsets.fromLTRB(4, 4, 4, 5),
             promptRectRange: namedArgs.containsKey('promptRectRange') ? namedArgs['promptRectRange'] : null,
             promptRectColor: namedArgs.containsKey('promptRectColor') ? namedArgs['promptRectColor'] : null,
             clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
             textSelectionDelegate: namedArgs['textSelectionDelegate']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -156,12 +193,14 @@ class RenderEditableAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SelectionChangedHandler': (HTFunction function) => (selection, renderObject, cause) =>
-          function.call(positionalArgs: [selection, renderObject, cause], namedArgs: const {}),
-      'CaretChangedHandler': (HTFunction function) =>
-          (caretRect) => function.call(positionalArgs: [caretRect], namedArgs: const {}),
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'SelectionChangedHandler': (HTFunction function) =>
+          (selection, renderObject, cause) => function.call(
+              positionalArgs: [selection, renderObject, cause],
+              namedArgs: const {}),
+      'CaretChangedHandler': (HTFunction function) => (caretRect) =>
+          function.call(positionalArgs: [caretRect], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -170,7 +209,7 @@ extension RenderEditableBinding on RenderEditable {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderEditable');
+        return const HTType('RenderEditable');
       case 'onSelectionChanged':
         return onSelectionChanged;
       case 'onCaretChanged':
@@ -308,41 +347,58 @@ extension RenderEditableBinding on RenderEditable {
       case 'parent':
         return parent;
       case 'systemFontsDidChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => systemFontsDidChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            systemFontsDidChange();
       case 'setPromptRectRange':
-        return ({positionalArgs, namedArgs, typeArgs}) => setPromptRectRange(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setPromptRectRange(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'getEndpointsForSelection':
-        return ({positionalArgs, namedArgs, typeArgs}) => getEndpointsForSelection(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getEndpointsForSelection(positionalArgs[0]);
       case 'getRectForComposingRange':
-        return ({positionalArgs, namedArgs, typeArgs}) => getRectForComposingRange(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getRectForComposingRange(positionalArgs[0]);
       case 'getPositionForPoint':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPositionForPoint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPositionForPoint(positionalArgs[0]);
       case 'getLocalRectForCaret':
-        return ({positionalArgs, namedArgs, typeArgs}) => getLocalRectForCaret(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getLocalRectForCaret(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'handleSecondaryTapDown':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleSecondaryTapDown(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleSecondaryTapDown(positionalArgs[0]);
       case 'handleTapDown':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleTapDown(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleTapDown(positionalArgs[0]);
       case 'handleTap':
         return ({positionalArgs, namedArgs, typeArgs}) => handleTap();
       case 'handleDoubleTap':
@@ -350,158 +406,239 @@ extension RenderEditableBinding on RenderEditable {
       case 'handleLongPress':
         return ({positionalArgs, namedArgs, typeArgs}) => handleLongPress();
       case 'selectPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            selectPosition(cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => selectPosition(
+            cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
       case 'selectPositionAt':
         return ({positionalArgs, namedArgs, typeArgs}) => selectPositionAt(
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null,
             cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
       case 'selectWord':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            selectWord(cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => selectWord(
+            cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
       case 'selectWordsInRange':
         return ({positionalArgs, namedArgs, typeArgs}) => selectWordsInRange(
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null,
             cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
       case 'selectWordEdge':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            selectWordEdge(cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => selectWordEdge(
+            cause: namedArgs.containsKey('cause') ? namedArgs['cause'] : null);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setFloatingCursor':
         return ({positionalArgs, namedArgs, typeArgs}) => setFloatingCursor(
             positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            resetLerpValue: namedArgs.containsKey('resetLerpValue') ? namedArgs['resetLerpValue'] : null);
+            resetLerpValue: namedArgs.containsKey('resetLerpValue')
+                ? namedArgs['resetLerpValue']
+                : null);
       case 'calculateBoundedFloatingCursorOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateBoundedFloatingCursorOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            calculateBoundedFloatingCursorOffset(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -509,7 +646,7 @@ extension RenderEditableBinding on RenderEditable {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -642,7 +779,7 @@ extension RenderEditableBinding on RenderEditable {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/error.g.dart b/lib/bindings/flutter/rendering/error.g.dart
index 486e3a4..73533a0 100644
--- a/lib/bindings/flutter/rendering/error.g.dart
+++ b/lib/bindings/flutter/rendering/error.g.dart
@@ -23,12 +23,13 @@ class RenderErrorBoxAutoBinding extends HTExternalClass {
       case 'RenderErrorBox.paragraphStyle':
         return RenderErrorBox.paragraphStyle;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderErrorBox.padding':
         return RenderErrorBox.padding = value;
@@ -41,7 +42,7 @@ class RenderErrorBoxAutoBinding extends HTExternalClass {
       case 'RenderErrorBox.paragraphStyle':
         return RenderErrorBox.paragraphStyle = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -57,8 +58,8 @@ class RenderErrorBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -67,7 +68,7 @@ extension RenderErrorBoxBinding on RenderErrorBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderErrorBox');
+        return const HTType('RenderErrorBox');
       case 'message':
         return message;
       case 'parentData':
@@ -117,40 +118,60 @@ extension RenderErrorBoxBinding on RenderErrorBox {
       case 'parent':
         return parent;
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
@@ -158,102 +179,165 @@ extension RenderErrorBoxBinding on RenderErrorBox {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -263,7 +347,7 @@ extension RenderErrorBoxBinding on RenderErrorBox {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -276,7 +360,7 @@ extension RenderErrorBoxBinding on RenderErrorBox {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/flex.g.dart b/lib/bindings/flutter/rendering/flex.g.dart
index 5048100..a972863 100644
--- a/lib/bindings/flutter/rendering/flex.g.dart
+++ b/lib/bindings/flutter/rendering/flex.g.dart
@@ -16,7 +16,7 @@ class FlexFitAutoBinding extends HTExternalClass {
       case 'FlexFit.loose':
         return FlexFit.loose;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class FlexFitAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlexFit');
+        return const HTType('FlexFit');
       case 'index':
         return (instance as FlexFit).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FlexFit).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FlexFit).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,7 +49,7 @@ class MainAxisSizeAutoBinding extends HTExternalClass {
       case 'MainAxisSize.max':
         return MainAxisSize.max;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -56,13 +57,14 @@ class MainAxisSizeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MainAxisSize');
+        return const HTType('MainAxisSize');
       case 'index':
         return (instance as MainAxisSize).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as MainAxisSize).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as MainAxisSize).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -88,7 +90,7 @@ class MainAxisAlignmentAutoBinding extends HTExternalClass {
       case 'MainAxisAlignment.spaceEvenly':
         return MainAxisAlignment.spaceEvenly;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -96,13 +98,14 @@ class MainAxisAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MainAxisAlignment');
+        return const HTType('MainAxisAlignment');
       case 'index':
         return (instance as MainAxisAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as MainAxisAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as MainAxisAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -126,7 +129,7 @@ class CrossAxisAlignmentAutoBinding extends HTExternalClass {
       case 'CrossAxisAlignment.baseline':
         return CrossAxisAlignment.baseline;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -134,13 +137,14 @@ class CrossAxisAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CrossAxisAlignment');
+        return const HTType('CrossAxisAlignment');
       case 'index':
         return (instance as CrossAxisAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as CrossAxisAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as CrossAxisAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -154,7 +158,7 @@ class FlexParentDataAutoBinding extends HTExternalClass {
       case 'FlexParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => FlexParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -173,7 +177,7 @@ extension FlexParentDataBinding on FlexParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlexParentData');
+        return const HTType('FlexParentData');
       case 'flex':
         return flex;
       case 'fit':
@@ -185,7 +189,7 @@ extension FlexParentDataBinding on FlexParentData {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -201,7 +205,7 @@ extension FlexParentDataBinding on FlexParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -214,21 +218,35 @@ class RenderFlexAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderFlex':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderFlex(
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null,
-            direction: namedArgs.containsKey('direction') ? namedArgs['direction'] : Axis.horizontal,
-            mainAxisSize: namedArgs.containsKey('mainAxisSize') ? namedArgs['mainAxisSize'] : MainAxisSize.max,
-            mainAxisAlignment:
-                namedArgs.containsKey('mainAxisAlignment') ? namedArgs['mainAxisAlignment'] : MainAxisAlignment.start,
+            children: namedArgs.containsKey('children')
+                ? List<RenderBox>.from(namedArgs['children'])
+                : null,
+            direction: namedArgs.containsKey('direction')
+                ? namedArgs['direction']
+                : Axis.horizontal,
+            mainAxisSize: namedArgs.containsKey('mainAxisSize')
+                ? namedArgs['mainAxisSize']
+                : MainAxisSize.max,
+            mainAxisAlignment: namedArgs.containsKey('mainAxisAlignment')
+                ? namedArgs['mainAxisAlignment']
+                : MainAxisAlignment.start,
             crossAxisAlignment: namedArgs.containsKey('crossAxisAlignment')
                 ? namedArgs['crossAxisAlignment']
                 : CrossAxisAlignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            verticalDirection:
-                namedArgs.containsKey('verticalDirection') ? namedArgs['verticalDirection'] : VerticalDirection.down,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            verticalDirection: namedArgs.containsKey('verticalDirection')
+                ? namedArgs['verticalDirection']
+                : VerticalDirection.down,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -244,8 +262,8 @@ class RenderFlexAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -254,7 +272,7 @@ extension RenderFlexBinding on RenderFlex {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderFlex');
+        return const HTType('RenderFlex');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -322,62 +340,86 @@ extension RenderFlexBinding on RenderFlex {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -385,135 +427,213 @@ extension RenderFlexBinding on RenderFlex {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'paintOverflowIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintOverflowIndicator(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3],
-            overflowHints:
-                namedArgs.containsKey('overflowHints') ? List<DiagnosticsNode>.from(namedArgs['overflowHints']) : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintOverflowIndicator(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3],
+                overflowHints: namedArgs.containsKey('overflowHints')
+                    ? List<DiagnosticsNode>.from(namedArgs['overflowHints'])
+                    : null);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -550,7 +670,7 @@ extension RenderFlexBinding on RenderFlex {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/flow.g.dart b/lib/bindings/flutter/rendering/flow.g.dart
index c75f578..167a673 100644
--- a/lib/bindings/flutter/rendering/flow.g.dart
+++ b/lib/bindings/flutter/rendering/flow.g.dart
@@ -12,7 +12,7 @@ class FlowParentDataAutoBinding extends HTExternalClass {
       case 'FlowParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => FlowParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +31,7 @@ extension FlowParentDataBinding on FlowParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlowParentData');
+        return const HTType('FlowParentData');
       case 'offset':
         return offset;
       case 'detach':
@@ -39,7 +39,7 @@ extension FlowParentDataBinding on FlowParentData {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -49,7 +49,7 @@ extension FlowParentDataBinding on FlowParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -62,11 +62,15 @@ class RenderFlowAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderFlow':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderFlow(
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null,
+            children: namedArgs.containsKey('children')
+                ? List<RenderBox>.from(namedArgs['children'])
+                : null,
             delegate: namedArgs['delegate'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -82,8 +86,8 @@ class RenderFlowAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -92,7 +96,7 @@ extension RenderFlowBinding on RenderFlow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderFlow');
+        return const HTType('RenderFlow');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -148,62 +152,89 @@ extension RenderFlowBinding on RenderFlow {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'getChildSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getChildSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getChildSize(positionalArgs[0]);
       case 'paintChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintChild(positionalArgs[0],
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            opacity: namedArgs.containsKey('opacity') ? namedArgs['opacity'] : 1.0);
+        return ({positionalArgs, namedArgs, typeArgs}) => paintChild(
+            positionalArgs[0],
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
+            opacity:
+                namedArgs.containsKey('opacity') ? namedArgs['opacity'] : 1.0);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -211,134 +242,211 @@ extension RenderFlowBinding on RenderFlow {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -357,7 +465,7 @@ extension RenderFlowBinding on RenderFlow {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/image.g.dart b/lib/bindings/flutter/rendering/image.g.dart
index 3172172..e9b015b 100644
--- a/lib/bindings/flutter/rendering/image.g.dart
+++ b/lib/bindings/flutter/rendering/image.g.dart
@@ -12,23 +12,44 @@ class RenderImageAutoBinding extends HTExternalClass {
       case 'RenderImage':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderImage(
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            debugImageLabel: namedArgs.containsKey('debugImageLabel') ? namedArgs['debugImageLabel'] : null,
+            debugImageLabel: namedArgs.containsKey('debugImageLabel')
+                ? namedArgs['debugImageLabel']
+                : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            colorBlendMode: namedArgs.containsKey('colorBlendMode') ? namedArgs['colorBlendMode'] : null,
+            colorBlendMode: namedArgs.containsKey('colorBlendMode')
+                ? namedArgs['colorBlendMode']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            invertColors: namedArgs.containsKey('invertColors') ? namedArgs['invertColors'] : false,
-            isAntiAlias: namedArgs.containsKey('isAntiAlias') ? namedArgs['isAntiAlias'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            invertColors: namedArgs.containsKey('invertColors')
+                ? namedArgs['invertColors']
+                : false,
+            isAntiAlias: namedArgs.containsKey('isAntiAlias')
+                ? namedArgs['isAntiAlias']
+                : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,8 +65,8 @@ class RenderImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -54,7 +75,7 @@ extension RenderImageBinding on RenderImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderImage');
+        return const HTType('RenderImage');
       case 'debugImageLabel':
         return debugImageLabel;
       case 'parentData':
@@ -132,147 +153,232 @@ extension RenderImageBinding on RenderImage {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -282,7 +388,7 @@ extension RenderImageBinding on RenderImage {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -343,7 +449,7 @@ extension RenderImageBinding on RenderImage {
         isAntiAlias = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/layer.g.dart b/lib/bindings/flutter/rendering/layer.g.dart
index 35408a1..05f23ec 100644
--- a/lib/bindings/flutter/rendering/layer.g.dart
+++ b/lib/bindings/flutter/rendering/layer.g.dart
@@ -12,9 +12,10 @@ class PictureLayerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PictureLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => PictureLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PictureLayer(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +34,7 @@ extension PictureLayerBinding on PictureLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PictureLayer');
+        return const HTType('PictureLayer');
       case 'canvasBounds':
         return canvasBounds;
       case 'debugCreator':
@@ -57,51 +58,73 @@ extension PictureLayerBinding on PictureLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -120,7 +143,7 @@ extension PictureLayerBinding on PictureLayer {
         willChangeHint = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -135,10 +158,13 @@ class TextureLayerAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => TextureLayer(
             rect: namedArgs['rect'],
             textureId: namedArgs['textureId'],
-            freeze: namedArgs.containsKey('freeze') ? namedArgs['freeze'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : ui.FilterQuality.low);
+            freeze:
+                namedArgs.containsKey('freeze') ? namedArgs['freeze'] : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : ui.FilterQuality.low);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -157,7 +183,7 @@ extension TextureLayerBinding on TextureLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextureLayer');
+        return const HTType('TextureLayer');
       case 'rect':
         return rect;
       case 'textureId':
@@ -181,51 +207,73 @@ extension TextureLayerBinding on TextureLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -235,7 +283,7 @@ extension TextureLayerBinding on TextureLayer {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -247,10 +295,10 @@ class PlatformViewLayerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PlatformViewLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            PlatformViewLayer(rect: namedArgs['rect'], viewId: namedArgs['viewId']);
+        return ({positionalArgs, namedArgs, typeArgs}) => PlatformViewLayer(
+            rect: namedArgs['rect'], viewId: namedArgs['viewId']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -269,7 +317,7 @@ extension PlatformViewLayerBinding on PlatformViewLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformViewLayer');
+        return const HTType('PlatformViewLayer');
       case 'rect':
         return rect;
       case 'viewId':
@@ -289,48 +337,67 @@ extension PlatformViewLayerBinding on PlatformViewLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -340,7 +407,7 @@ extension PlatformViewLayerBinding on PlatformViewLayer {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -352,14 +419,17 @@ class PerformanceOverlayLayerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PerformanceOverlayLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => PerformanceOverlayLayer(
-            overlayRect: namedArgs['overlayRect'],
-            optionsMask: namedArgs['optionsMask'],
-            rasterizerThreshold: namedArgs['rasterizerThreshold'],
-            checkerboardRasterCacheImages: namedArgs['checkerboardRasterCacheImages'],
-            checkerboardOffscreenLayers: namedArgs['checkerboardOffscreenLayers']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PerformanceOverlayLayer(
+                overlayRect: namedArgs['overlayRect'],
+                optionsMask: namedArgs['optionsMask'],
+                rasterizerThreshold: namedArgs['rasterizerThreshold'],
+                checkerboardRasterCacheImages:
+                    namedArgs['checkerboardRasterCacheImages'],
+                checkerboardOffscreenLayers:
+                    namedArgs['checkerboardOffscreenLayers']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -378,7 +448,7 @@ extension PerformanceOverlayLayerBinding on PerformanceOverlayLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PerformanceOverlayLayer');
+        return const HTType('PerformanceOverlayLayer');
       case 'optionsMask':
         return optionsMask;
       case 'rasterizerThreshold':
@@ -404,51 +474,73 @@ extension PerformanceOverlayLayerBinding on PerformanceOverlayLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -461,7 +553,7 @@ extension PerformanceOverlayLayerBinding on PerformanceOverlayLayer {
         overlayRect = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -475,7 +567,7 @@ class ContainerLayerAutoBinding extends HTExternalClass {
       case 'ContainerLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => ContainerLayer();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -494,7 +586,7 @@ extension ContainerLayerBinding on ContainerLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ContainerLayer');
+        return const HTType('ContainerLayer');
       case 'debugCreator':
         return debugCreator;
       case 'firstChild':
@@ -516,56 +608,83 @@ extension ContainerLayerBinding on ContainerLayer {
       case 'attached':
         return attached;
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -573,7 +692,7 @@ extension ContainerLayerBinding on ContainerLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -583,7 +702,7 @@ extension ContainerLayerBinding on ContainerLayer {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -595,10 +714,12 @@ class OffsetLayerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'OffsetLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            OffsetLayer(offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => OffsetLayer(
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -617,7 +738,7 @@ extension OffsetLayerBinding on OffsetLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OffsetLayer');
+        return const HTType('OffsetLayer');
       case 'debugCreator':
         return debugCreator;
       case 'offset':
@@ -641,59 +762,89 @@ extension OffsetLayerBinding on OffsetLayer {
       case 'attached':
         return attached;
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
-      case 'addToScene':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+            applyTransform(positionalArgs[0], positionalArgs[1]);
+      case 'addToScene':
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toImage':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toImage(positionalArgs[0], pixelRatio: namedArgs.containsKey('pixelRatio') ? namedArgs['pixelRatio'] : 1.0);
+            debugFillProperties(positionalArgs[0]);
+      case 'toImage':
+        return ({positionalArgs, namedArgs, typeArgs}) => toImage(
+            positionalArgs[0],
+            pixelRatio: namedArgs.containsKey('pixelRatio')
+                ? namedArgs['pixelRatio']
+                : 1.0);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -701,7 +852,7 @@ extension OffsetLayerBinding on OffsetLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -714,7 +865,7 @@ extension OffsetLayerBinding on OffsetLayer {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -727,10 +878,14 @@ class ClipRectLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ClipRectLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipRectLayer(
-            clipRect: namedArgs.containsKey('clipRect') ? namedArgs['clipRect'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            clipRect: namedArgs.containsKey('clipRect')
+                ? namedArgs['clipRect']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -749,7 +904,7 @@ extension ClipRectLayerBinding on ClipRectLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipRectLayer');
+        return const HTType('ClipRectLayer');
       case 'debugCreator':
         return debugCreator;
       case 'clipRect':
@@ -775,56 +930,83 @@ extension ClipRectLayerBinding on ClipRectLayer {
       case 'attached':
         return attached;
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -832,7 +1014,7 @@ extension ClipRectLayerBinding on ClipRectLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -848,7 +1030,7 @@ extension ClipRectLayerBinding on ClipRectLayer {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -861,10 +1043,14 @@ class ClipRRectLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ClipRRectLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipRRectLayer(
-            clipRRect: namedArgs.containsKey('clipRRect') ? namedArgs['clipRRect'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias);
+            clipRRect: namedArgs.containsKey('clipRRect')
+                ? namedArgs['clipRRect']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -883,7 +1069,7 @@ extension ClipRRectLayerBinding on ClipRRectLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipRRectLayer');
+        return const HTType('ClipRRectLayer');
       case 'debugCreator':
         return debugCreator;
       case 'clipRRect':
@@ -909,56 +1095,83 @@ extension ClipRRectLayerBinding on ClipRRectLayer {
       case 'attached':
         return attached;
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -966,7 +1179,7 @@ extension ClipRRectLayerBinding on ClipRRectLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -982,7 +1195,7 @@ extension ClipRRectLayerBinding on ClipRRectLayer {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -995,10 +1208,14 @@ class ClipPathLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ClipPathLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipPathLayer(
-            clipPath: namedArgs.containsKey('clipPath') ? namedArgs['clipPath'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias);
+            clipPath: namedArgs.containsKey('clipPath')
+                ? namedArgs['clipPath']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1017,7 +1234,7 @@ extension ClipPathLayerBinding on ClipPathLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipPathLayer');
+        return const HTType('ClipPathLayer');
       case 'debugCreator':
         return debugCreator;
       case 'clipPath':
@@ -1043,56 +1260,83 @@ extension ClipPathLayerBinding on ClipPathLayer {
       case 'attached':
         return attached;
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -1100,7 +1344,7 @@ extension ClipPathLayerBinding on ClipPathLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1116,7 +1360,7 @@ extension ClipPathLayerBinding on ClipPathLayer {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1128,10 +1372,12 @@ class ColorFilterLayerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ColorFilterLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ColorFilterLayer(colorFilter: namedArgs.containsKey('colorFilter') ? namedArgs['colorFilter'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ColorFilterLayer(
+            colorFilter: namedArgs.containsKey('colorFilter')
+                ? namedArgs['colorFilter']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1150,7 +1396,7 @@ extension ColorFilterLayerBinding on ColorFilterLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ColorFilterLayer');
+        return const HTType('ColorFilterLayer');
       case 'debugCreator':
         return debugCreator;
       case 'colorFilter':
@@ -1174,56 +1420,83 @@ extension ColorFilterLayerBinding on ColorFilterLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -1231,7 +1504,7 @@ extension ColorFilterLayerBinding on ColorFilterLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1244,7 +1517,7 @@ extension ColorFilterLayerBinding on ColorFilterLayer {
         colorFilter = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1256,10 +1529,12 @@ class ImageFilterLayerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ImageFilterLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ImageFilterLayer(imageFilter: namedArgs.containsKey('imageFilter') ? namedArgs['imageFilter'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ImageFilterLayer(
+            imageFilter: namedArgs.containsKey('imageFilter')
+                ? namedArgs['imageFilter']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1278,7 +1553,7 @@ extension ImageFilterLayerBinding on ImageFilterLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageFilterLayer');
+        return const HTType('ImageFilterLayer');
       case 'debugCreator':
         return debugCreator;
       case 'imageFilter':
@@ -1302,56 +1577,83 @@ extension ImageFilterLayerBinding on ImageFilterLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -1359,7 +1661,7 @@ extension ImageFilterLayerBinding on ImageFilterLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1372,7 +1674,7 @@ extension ImageFilterLayerBinding on ImageFilterLayer {
         imageFilter = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1385,10 +1687,14 @@ class TransformLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TransformLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => TransformLayer(
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero);
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1407,7 +1713,7 @@ extension TransformLayerBinding on TransformLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TransformLayer');
+        return const HTType('TransformLayer');
       case 'debugCreator':
         return debugCreator;
       case 'transform':
@@ -1433,59 +1739,89 @@ extension TransformLayerBinding on TransformLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toImage':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toImage(positionalArgs[0], pixelRatio: namedArgs.containsKey('pixelRatio') ? namedArgs['pixelRatio'] : 1.0);
+            debugFillProperties(positionalArgs[0]);
+      case 'toImage':
+        return ({positionalArgs, namedArgs, typeArgs}) => toImage(
+            positionalArgs[0],
+            pixelRatio: namedArgs.containsKey('pixelRatio')
+                ? namedArgs['pixelRatio']
+                : 1.0);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -1493,7 +1829,7 @@ extension TransformLayerBinding on TransformLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1506,7 +1842,7 @@ extension TransformLayerBinding on TransformLayer {
         transform = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1520,9 +1856,11 @@ class OpacityLayerAutoBinding extends HTExternalClass {
       case 'OpacityLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => OpacityLayer(
             alpha: namedArgs.containsKey('alpha') ? namedArgs['alpha'] : null,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero);
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1541,7 +1879,7 @@ extension OpacityLayerBinding on OpacityLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OpacityLayer');
+        return const HTType('OpacityLayer');
       case 'debugCreator':
         return debugCreator;
       case 'alpha':
@@ -1567,56 +1905,83 @@ extension OpacityLayerBinding on OpacityLayer {
       case 'attached':
         return attached;
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
-      case 'addToScene':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+            applyTransform(positionalArgs[0], positionalArgs[1]);
+      case 'addToScene':
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -1624,7 +1989,7 @@ extension OpacityLayerBinding on OpacityLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1640,7 +2005,7 @@ extension OpacityLayerBinding on OpacityLayer {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1653,11 +2018,16 @@ class ShaderMaskLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ShaderMaskLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => ShaderMaskLayer(
-            shader: namedArgs.containsKey('shader') ? namedArgs['shader'] : null,
-            maskRect: namedArgs.containsKey('maskRect') ? namedArgs['maskRect'] : null,
-            blendMode: namedArgs.containsKey('blendMode') ? namedArgs['blendMode'] : null);
+            shader:
+                namedArgs.containsKey('shader') ? namedArgs['shader'] : null,
+            maskRect: namedArgs.containsKey('maskRect')
+                ? namedArgs['maskRect']
+                : null,
+            blendMode: namedArgs.containsKey('blendMode')
+                ? namedArgs['blendMode']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1676,7 +2046,7 @@ extension ShaderMaskLayerBinding on ShaderMaskLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShaderMaskLayer');
+        return const HTType('ShaderMaskLayer');
       case 'debugCreator':
         return debugCreator;
       case 'shader':
@@ -1704,56 +2074,83 @@ extension ShaderMaskLayerBinding on ShaderMaskLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -1761,7 +2158,7 @@ extension ShaderMaskLayerBinding on ShaderMaskLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1780,7 +2177,7 @@ extension ShaderMaskLayerBinding on ShaderMaskLayer {
         blendMode = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1792,10 +2189,11 @@ class BackdropFilterLayerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BackdropFilterLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BackdropFilterLayer(filter: namedArgs.containsKey('filter') ? namedArgs['filter'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => BackdropFilterLayer(
+            filter:
+                namedArgs.containsKey('filter') ? namedArgs['filter'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1814,7 +2212,7 @@ extension BackdropFilterLayerBinding on BackdropFilterLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BackdropFilterLayer');
+        return const HTType('BackdropFilterLayer');
       case 'debugCreator':
         return debugCreator;
       case 'filter':
@@ -1838,56 +2236,83 @@ extension BackdropFilterLayerBinding on BackdropFilterLayer {
       case 'attached':
         return attached;
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -1895,7 +2320,7 @@ extension BackdropFilterLayerBinding on BackdropFilterLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1908,7 +2333,7 @@ extension BackdropFilterLayerBinding on BackdropFilterLayer {
         filter = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1921,13 +2346,21 @@ class PhysicalModelLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PhysicalModelLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => PhysicalModelLayer(
-            clipPath: namedArgs.containsKey('clipPath') ? namedArgs['clipPath'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : null,
+            clipPath: namedArgs.containsKey('clipPath')
+                ? namedArgs['clipPath']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : null);
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1946,7 +2379,7 @@ extension PhysicalModelLayerBinding on PhysicalModelLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PhysicalModelLayer');
+        return const HTType('PhysicalModelLayer');
       case 'debugCreator':
         return debugCreator;
       case 'clipPath':
@@ -1978,56 +2411,83 @@ extension PhysicalModelLayerBinding on PhysicalModelLayer {
       case 'attached':
         return attached;
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -2035,7 +2495,7 @@ extension PhysicalModelLayerBinding on PhysicalModelLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2060,7 +2520,7 @@ extension PhysicalModelLayerBinding on PhysicalModelLayer {
         shadowColor = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2074,7 +2534,7 @@ class LayerLinkAutoBinding extends HTExternalClass {
       case 'LayerLink':
         return ({positionalArgs, namedArgs, typeArgs}) => LayerLink();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2093,7 +2553,7 @@ extension LayerLinkBinding on LayerLink {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LayerLink');
+        return const HTType('LayerLink');
       case 'leaderSize':
         return leaderSize;
       case 'leader':
@@ -2101,7 +2561,7 @@ extension LayerLinkBinding on LayerLink {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2111,7 +2571,7 @@ extension LayerLinkBinding on LayerLink {
         leaderSize = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2124,9 +2584,12 @@ class LeaderLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'LeaderLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => LeaderLayer(
-            link: namedArgs['link'], offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero);
+            link: namedArgs['link'],
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2145,7 +2608,7 @@ extension LeaderLayerBinding on LeaderLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LeaderLayer');
+        return const HTType('LeaderLayer');
       case 'offset':
         return offset;
       case 'debugCreator':
@@ -2173,56 +2636,83 @@ extension LeaderLayerBinding on LeaderLayer {
       case 'attached':
         return attached;
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -2230,7 +2720,7 @@ extension LeaderLayerBinding on LeaderLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2246,7 +2736,7 @@ extension LeaderLayerBinding on LeaderLayer {
         link = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2260,11 +2750,17 @@ class FollowerLayerAutoBinding extends HTExternalClass {
       case 'FollowerLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => FollowerLayer(
             link: namedArgs['link'],
-            showWhenUnlinked: namedArgs.containsKey('showWhenUnlinked') ? namedArgs['showWhenUnlinked'] : true,
-            unlinkedOffset: namedArgs.containsKey('unlinkedOffset') ? namedArgs['unlinkedOffset'] : Offset.zero,
-            linkedOffset: namedArgs.containsKey('linkedOffset') ? namedArgs['linkedOffset'] : Offset.zero);
+            showWhenUnlinked: namedArgs.containsKey('showWhenUnlinked')
+                ? namedArgs['showWhenUnlinked']
+                : true,
+            unlinkedOffset: namedArgs.containsKey('unlinkedOffset')
+                ? namedArgs['unlinkedOffset']
+                : Offset.zero,
+            linkedOffset: namedArgs.containsKey('linkedOffset')
+                ? namedArgs['linkedOffset']
+                : Offset.zero);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2283,7 +2779,7 @@ extension FollowerLayerBinding on FollowerLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FollowerLayer');
+        return const HTType('FollowerLayer');
       case 'showWhenUnlinked':
         return showWhenUnlinked;
       case 'unlinkedOffset':
@@ -2315,58 +2811,85 @@ extension FollowerLayerBinding on FollowerLayer {
       case 'attached':
         return attached;
       case 'findAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(positionalArgs[0], positionalArgs[1],
-            onlyFirst: namedArgs.containsKey('onlyFirst') ? namedArgs['onlyFirst'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => findAnnotations(
+            positionalArgs[0], positionalArgs[1],
+            onlyFirst: namedArgs.containsKey('onlyFirst')
+                ? namedArgs['onlyFirst']
+                : null);
       case 'getLastTransform':
         return ({positionalArgs, namedArgs, typeArgs}) => getLastTransform();
       case 'addToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'applyTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildScene(positionalArgs[0]);
       case 'updateSubtreeNeedsAddToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateSubtreeNeedsAddToScene();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateSubtreeNeedsAddToScene();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'append':
-        return ({positionalArgs, namedArgs, typeArgs}) => append(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            append(positionalArgs[0]);
       case 'removeAllChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAllChildren();
       case 'addChildrenToScene':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            addChildrenToScene(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
+        return ({positionalArgs, namedArgs, typeArgs}) => addChildrenToScene(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : Offset.zero);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       case 'find':
-        return ({positionalArgs, namedArgs, typeArgs}) => find(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            find(positionalArgs[0]);
       case 'findAllAnnotations':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAllAnnotations(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAllAnnotations(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -2374,7 +2897,7 @@ extension FollowerLayerBinding on FollowerLayer {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2396,7 +2919,7 @@ extension FollowerLayerBinding on FollowerLayer {
         link = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/layout_helper.g.dart b/lib/bindings/flutter/rendering/layout_helper.g.dart
index fc2d173..208e6d2 100644
--- a/lib/bindings/flutter/rendering/layout_helper.g.dart
+++ b/lib/bindings/flutter/rendering/layout_helper.g.dart
@@ -9,12 +9,13 @@ class ChildLayoutHelperAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ChildLayoutHelper.dryLayoutChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ChildLayoutHelper.dryLayoutChild(positionalArgs[0], positionalArgs[1]);
+            ChildLayoutHelper.dryLayoutChild(
+                positionalArgs[0], positionalArgs[1]);
       case 'ChildLayoutHelper.layoutChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             ChildLayoutHelper.layoutChild(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/list_body.g.dart b/lib/bindings/flutter/rendering/list_body.g.dart
index 5ecfed4..2e02c6f 100644
--- a/lib/bindings/flutter/rendering/list_body.g.dart
+++ b/lib/bindings/flutter/rendering/list_body.g.dart
@@ -12,7 +12,7 @@ class ListBodyParentDataAutoBinding extends HTExternalClass {
       case 'ListBodyParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => ListBodyParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +31,7 @@ extension ListBodyParentDataBinding on ListBodyParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListBodyParentData');
+        return const HTType('ListBodyParentData');
       case 'offset':
         return offset;
       case 'detach':
@@ -39,7 +39,7 @@ extension ListBodyParentDataBinding on ListBodyParentData {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -49,7 +49,7 @@ extension ListBodyParentDataBinding on ListBodyParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -62,10 +62,14 @@ class RenderListBodyAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderListBody':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderListBody(
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down);
+            children: namedArgs.containsKey('children')
+                ? List<RenderBox>.from(namedArgs['children'])
+                : null,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : AxisDirection.down);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -81,8 +85,8 @@ class RenderListBodyAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -91,7 +95,7 @@ extension RenderListBodyBinding on RenderListBody {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderListBody');
+        return const HTType('RenderListBody');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -147,58 +151,81 @@ extension RenderListBodyBinding on RenderListBody {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -206,134 +233,211 @@ extension RenderListBodyBinding on RenderListBody {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -349,7 +453,7 @@ extension RenderListBodyBinding on RenderListBody {
         axisDirection = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/list_wheel_viewport.g.dart b/lib/bindings/flutter/rendering/list_wheel_viewport.g.dart
index 0e38682..2466c24 100644
--- a/lib/bindings/flutter/rendering/list_wheel_viewport.g.dart
+++ b/lib/bindings/flutter/rendering/list_wheel_viewport.g.dart
@@ -12,7 +12,7 @@ class ListWheelParentDataAutoBinding extends HTExternalClass {
       case 'ListWheelParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => ListWheelParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +31,7 @@ extension ListWheelParentDataBinding on ListWheelParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListWheelParentData');
+        return const HTType('ListWheelParentData');
       case 'index':
         return index;
       case 'offset':
@@ -41,7 +41,7 @@ extension ListWheelParentDataBinding on ListWheelParentData {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -54,7 +54,7 @@ extension ListWheelParentDataBinding on ListWheelParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -66,23 +66,42 @@ class RenderListWheelViewportAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderListWheelViewport':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderListWheelViewport(
-            childManager: namedArgs['childManager'],
-            offset: namedArgs['offset'],
-            diameterRatio: namedArgs.containsKey('diameterRatio') ? namedArgs['diameterRatio'] : defaultDiameterRatio,
-            perspective: namedArgs.containsKey('perspective') ? namedArgs['perspective'] : defaultPerspective,
-            offAxisFraction: namedArgs.containsKey('offAxisFraction') ? namedArgs['offAxisFraction'] : 0,
-            useMagnifier: namedArgs.containsKey('useMagnifier') ? namedArgs['useMagnifier'] : false,
-            magnification: namedArgs.containsKey('magnification') ? namedArgs['magnification'] : 1,
-            overAndUnderCenterOpacity:
-                namedArgs.containsKey('overAndUnderCenterOpacity') ? namedArgs['overAndUnderCenterOpacity'] : 1,
-            itemExtent: namedArgs['itemExtent'],
-            squeeze: namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : 1,
-            renderChildrenOutsideViewport: namedArgs.containsKey('renderChildrenOutsideViewport')
-                ? namedArgs['renderChildrenOutsideViewport']
-                : false,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderListWheelViewport(
+                childManager: namedArgs['childManager'],
+                offset: namedArgs['offset'],
+                diameterRatio: namedArgs.containsKey('diameterRatio')
+                    ? namedArgs['diameterRatio']
+                    : defaultDiameterRatio,
+                perspective: namedArgs.containsKey('perspective')
+                    ? namedArgs['perspective']
+                    : defaultPerspective,
+                offAxisFraction: namedArgs.containsKey('offAxisFraction')
+                    ? namedArgs['offAxisFraction']
+                    : 0,
+                useMagnifier: namedArgs.containsKey('useMagnifier')
+                    ? namedArgs['useMagnifier']
+                    : false,
+                magnification: namedArgs.containsKey('magnification')
+                    ? namedArgs['magnification']
+                    : 1,
+                overAndUnderCenterOpacity:
+                    namedArgs.containsKey('overAndUnderCenterOpacity')
+                        ? namedArgs['overAndUnderCenterOpacity']
+                        : 1,
+                itemExtent: namedArgs['itemExtent'],
+                squeeze:
+                    namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : 1,
+                renderChildrenOutsideViewport:
+                    namedArgs.containsKey('renderChildrenOutsideViewport')
+                        ? namedArgs['renderChildrenOutsideViewport']
+                        : false,
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.none,
+                children: namedArgs.containsKey('children')
+                    ? List<RenderBox>.from(namedArgs['children'])
+                    : null);
       case 'RenderListWheelViewport.defaultDiameterRatio':
         return RenderListWheelViewport.defaultDiameterRatio;
       case 'RenderListWheelViewport.defaultPerspective':
@@ -92,9 +111,10 @@ class RenderListWheelViewportAutoBinding extends HTExternalClass {
       case 'RenderListWheelViewport.perspectiveTooHighMessage':
         return RenderListWheelViewport.perspectiveTooHighMessage;
       case 'RenderListWheelViewport.clipBehaviorAndRenderChildrenOutsideViewportConflict':
-        return RenderListWheelViewport.clipBehaviorAndRenderChildrenOutsideViewportConflict;
+        return RenderListWheelViewport
+            .clipBehaviorAndRenderChildrenOutsideViewportConflict;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -110,8 +130,8 @@ class RenderListWheelViewportAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 
@@ -123,7 +143,7 @@ extension RenderListWheelViewportBinding on RenderListWheelViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderListWheelViewport');
+        return const HTType('RenderListWheelViewport');
       case 'childManager':
         return childManager;
       case 'parentData':
@@ -201,187 +221,286 @@ extension RenderListWheelViewportBinding on RenderListWheelViewport {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'indexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => indexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            indexOf(positionalArgs[0]);
       case 'scrollOffsetToIndex':
-        return ({positionalArgs, namedArgs, typeArgs}) => scrollOffsetToIndex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scrollOffsetToIndex(positionalArgs[0]);
       case 'indexToScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => indexToScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            indexToScrollOffset(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'getOffsetToReveal':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(positionalArgs[0], positionalArgs[1],
+        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(
+            positionalArgs[0], positionalArgs[1],
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -427,7 +546,7 @@ extension RenderListWheelViewportBinding on RenderListWheelViewport {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/mouse_cursor.g.dart b/lib/bindings/flutter/rendering/mouse_cursor.g.dart
index 80d3dcc..8572498 100644
--- a/lib/bindings/flutter/rendering/mouse_cursor.g.dart
+++ b/lib/bindings/flutter/rendering/mouse_cursor.g.dart
@@ -80,7 +80,7 @@ class SystemMouseCursorsAutoBinding extends HTExternalClass {
       case 'SystemMouseCursors.zoomOut':
         return SystemMouseCursors.zoomOut;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/mouse_tracking.g.dart b/lib/bindings/flutter/rendering/mouse_tracking.g.dart
index 26e1544..a13d226 100644
--- a/lib/bindings/flutter/rendering/mouse_tracking.g.dart
+++ b/lib/bindings/flutter/rendering/mouse_tracking.g.dart
@@ -10,14 +10,23 @@ class MouseTrackerAnnotationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MouseTrackerAnnotation':
-        return ({positionalArgs, namedArgs, typeArgs}) => MouseTrackerAnnotation(
-            onEnter: namedArgs.containsKey('onEnter') ? namedArgs['onEnter'] : null,
-            onExit: namedArgs.containsKey('onExit') ? namedArgs['onExit'] : null,
-            cursor: namedArgs.containsKey('cursor') ? namedArgs['cursor'] : MouseCursor.defer,
-            validForMouseTracker:
-                namedArgs.containsKey('validForMouseTracker') ? namedArgs['validForMouseTracker'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MouseTrackerAnnotation(
+                onEnter: namedArgs.containsKey('onEnter')
+                    ? namedArgs['onEnter']
+                    : null,
+                onExit: namedArgs.containsKey('onExit')
+                    ? namedArgs['onExit']
+                    : null,
+                cursor: namedArgs.containsKey('cursor')
+                    ? namedArgs['cursor']
+                    : MouseCursor.defer,
+                validForMouseTracker:
+                    namedArgs.containsKey('validForMouseTracker')
+                        ? namedArgs['validForMouseTracker']
+                        : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,10 +37,10 @@ class MouseTrackerAnnotationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PointerEnterEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerExitEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerEnterEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerExitEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
     };
   }
 }
@@ -40,7 +49,7 @@ extension MouseTrackerAnnotationBinding on MouseTrackerAnnotation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MouseTrackerAnnotation');
+        return const HTType('MouseTrackerAnnotation');
       case 'onEnter':
         return onEnter;
       case 'onExit':
@@ -50,18 +59,21 @@ extension MouseTrackerAnnotationBinding on MouseTrackerAnnotation {
       case 'validForMouseTracker':
         return validForMouseTracker;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -73,18 +85,22 @@ class MouseTrackerUpdateDetailsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MouseTrackerUpdateDetails.byNewFrame':
-        return ({positionalArgs, namedArgs, typeArgs}) => MouseTrackerUpdateDetails.byNewFrame(
-            lastAnnotations: namedArgs['lastAnnotations'],
-            nextAnnotations: namedArgs['nextAnnotations'],
-            previousEvent: namedArgs['previousEvent']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MouseTrackerUpdateDetails.byNewFrame(
+                lastAnnotations: namedArgs['lastAnnotations'],
+                nextAnnotations: namedArgs['nextAnnotations'],
+                previousEvent: namedArgs['previousEvent']);
       case 'MouseTrackerUpdateDetails.byPointerEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => MouseTrackerUpdateDetails.byPointerEvent(
-            lastAnnotations: namedArgs['lastAnnotations'],
-            nextAnnotations: namedArgs['nextAnnotations'],
-            previousEvent: namedArgs.containsKey('previousEvent') ? namedArgs['previousEvent'] : null,
-            triggeringEvent: namedArgs['triggeringEvent']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MouseTrackerUpdateDetails.byPointerEvent(
+                lastAnnotations: namedArgs['lastAnnotations'],
+                nextAnnotations: namedArgs['nextAnnotations'],
+                previousEvent: namedArgs.containsKey('previousEvent')
+                    ? namedArgs['previousEvent']
+                    : null,
+                triggeringEvent: namedArgs['triggeringEvent']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -98,7 +114,7 @@ extension MouseTrackerUpdateDetailsBinding on MouseTrackerUpdateDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MouseTrackerUpdateDetails');
+        return const HTType('MouseTrackerUpdateDetails');
       case 'lastAnnotations':
         return lastAnnotations;
       case 'nextAnnotations':
@@ -112,18 +128,21 @@ extension MouseTrackerUpdateDetailsBinding on MouseTrackerUpdateDetails {
       case 'latestEvent':
         return latestEvent;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -137,7 +156,7 @@ class MouseTrackerAutoBinding extends HTExternalClass {
       case 'MouseTracker':
         return ({positionalArgs, namedArgs, typeArgs}) => MouseTracker();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -148,9 +167,11 @@ class MouseTrackerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'MouseDetectorAnnotationFinder': (HTFunction function) =>
-          (offset) => function.call(positionalArgs: [offset], namedArgs: const {}) as HitTestResult,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'MouseDetectorAnnotationFinder': (HTFunction function) => (offset) =>
+          function.call(positionalArgs: [offset], namedArgs: const {})
+              as HitTestResult,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -159,21 +180,25 @@ extension MouseTrackerBinding on MouseTracker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MouseTracker');
+        return const HTType('MouseTracker');
       case 'mouseIsConnected':
         return mouseIsConnected;
       case 'updateWithEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateWithEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateWithEvent(positionalArgs[0], positionalArgs[1]);
       case 'updateAllDevices':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateAllDevices(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateAllDevices(positionalArgs[0]);
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/object.g.dart b/lib/bindings/flutter/rendering/object.g.dart
index d2d5c91..38d7010 100644
--- a/lib/bindings/flutter/rendering/object.g.dart
+++ b/lib/bindings/flutter/rendering/object.g.dart
@@ -12,7 +12,7 @@ class ParentDataAutoBinding extends HTExternalClass {
       case 'ParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => ParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,11 +26,11 @@ extension ParentDataBinding on ParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ParentData');
+        return const HTType('ParentData');
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,19 +42,28 @@ class PaintingContextAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PaintingContext':
-        return ({positionalArgs, namedArgs, typeArgs}) => PaintingContext(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PaintingContext(positionalArgs[0], positionalArgs[1]);
       case 'PaintingContext.repaintCompositedChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => PaintingContext.repaintCompositedChild(positionalArgs[0],
-            debugAlsoPaintedParent:
-                namedArgs.containsKey('debugAlsoPaintedParent') ? namedArgs['debugAlsoPaintedParent'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PaintingContext.repaintCompositedChild(positionalArgs[0],
+                debugAlsoPaintedParent:
+                    namedArgs.containsKey('debugAlsoPaintedParent')
+                        ? namedArgs['debugAlsoPaintedParent']
+                        : false);
       case 'PaintingContext.debugInstrumentRepaintCompositedChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => PaintingContext.debugInstrumentRepaintCompositedChild(
-            positionalArgs[0],
-            debugAlsoPaintedParent:
-                namedArgs.containsKey('debugAlsoPaintedParent') ? namedArgs['debugAlsoPaintedParent'] : false,
-            customContext: namedArgs.containsKey('customContext') ? namedArgs['customContext'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PaintingContext.debugInstrumentRepaintCompositedChild(
+                positionalArgs[0],
+                debugAlsoPaintedParent:
+                    namedArgs.containsKey('debugAlsoPaintedParent')
+                        ? namedArgs['debugAlsoPaintedParent']
+                        : false,
+                customContext: namedArgs.containsKey('customContext')
+                    ? namedArgs['customContext']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -65,8 +74,8 @@ class PaintingContextAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PaintingContextCallback': (HTFunction function) =>
-          (context, offset) => function.call(positionalArgs: [context, offset], namedArgs: const {}),
+      'PaintingContextCallback': (HTFunction function) => (context, offset) =>
+          function.call(positionalArgs: [context, offset], namedArgs: const {}),
     };
   }
 }
@@ -75,63 +84,108 @@ extension PaintingContextBinding on PaintingContext {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PaintingContext');
+        return const HTType('PaintingContext');
       case 'estimatedBounds':
         return estimatedBounds;
       case 'canvas':
         return canvas;
       case 'paintChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintChild(positionalArgs[0], positionalArgs[1]);
       case 'setIsComplexHint':
         return ({positionalArgs, namedArgs, typeArgs}) => setIsComplexHint();
       case 'setWillChangeHint':
         return ({positionalArgs, namedArgs, typeArgs}) => setWillChangeHint();
       case 'addLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => addLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addLayer(positionalArgs[0]);
       case 'pushLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => pushLayer(
             positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            childPaintBounds: namedArgs.containsKey('childPaintBounds') ? namedArgs['childPaintBounds'] : null);
+            childPaintBounds: namedArgs.containsKey('childPaintBounds')
+                ? namedArgs['childPaintBounds']
+                : null);
       case 'pushClipRect':
         return ({positionalArgs, namedArgs, typeArgs}) => pushClipRect(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushClipRRect':
         return ({positionalArgs, namedArgs, typeArgs}) => pushClipRRect(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4],
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushClipPath':
         return ({positionalArgs, namedArgs, typeArgs}) => pushClipPath(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            positionalArgs[4],
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushColorFilter':
         return ({positionalArgs, namedArgs, typeArgs}) => pushColorFilter(
             positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushTransform':
         return ({positionalArgs, namedArgs, typeArgs}) => pushTransform(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3],
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'pushOpacity':
         return ({positionalArgs, namedArgs, typeArgs}) => pushOpacity(
             positionalArgs[0], positionalArgs[1], positionalArgs[2],
-            oldLayer: namedArgs.containsKey('oldLayer') ? namedArgs['oldLayer'] : null);
+            oldLayer: namedArgs.containsKey('oldLayer')
+                ? namedArgs['oldLayer']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'clipPathAndPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            clipPathAndPaint(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => clipPathAndPaint(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'clipRRectAndPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            clipRRectAndPaint(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => clipRRectAndPaint(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'clipRectAndPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            clipRectAndPaint(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => clipRectAndPaint(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -144,13 +198,19 @@ class PipelineOwnerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PipelineOwner':
         return ({positionalArgs, namedArgs, typeArgs}) => PipelineOwner(
-            onNeedVisualUpdate: namedArgs.containsKey('onNeedVisualUpdate') ? namedArgs['onNeedVisualUpdate'] : null,
+            onNeedVisualUpdate: namedArgs.containsKey('onNeedVisualUpdate')
+                ? namedArgs['onNeedVisualUpdate']
+                : null,
             onSemanticsOwnerCreated:
-                namedArgs.containsKey('onSemanticsOwnerCreated') ? namedArgs['onSemanticsOwnerCreated'] : null,
+                namedArgs.containsKey('onSemanticsOwnerCreated')
+                    ? namedArgs['onSemanticsOwnerCreated']
+                    : null,
             onSemanticsOwnerDisposed:
-                namedArgs.containsKey('onSemanticsOwnerDisposed') ? namedArgs['onSemanticsOwnerDisposed'] : null);
+                namedArgs.containsKey('onSemanticsOwnerDisposed')
+                    ? namedArgs['onSemanticsOwnerDisposed']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -166,7 +226,8 @@ class PipelineOwnerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -175,7 +236,7 @@ extension PipelineOwnerBinding on PipelineOwner {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PipelineOwner');
+        return const HTType('PipelineOwner');
       case 'onNeedVisualUpdate':
         return onNeedVisualUpdate;
       case 'onSemanticsOwnerCreated':
@@ -197,16 +258,19 @@ extension PipelineOwnerBinding on PipelineOwner {
       case 'flushLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => flushLayout();
       case 'flushCompositingBits':
-        return ({positionalArgs, namedArgs, typeArgs}) => flushCompositingBits();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            flushCompositingBits();
       case 'flushPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => flushPaint();
       case 'ensureSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ensureSemantics(listener: namedArgs.containsKey('listener') ? namedArgs['listener'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ensureSemantics(
+            listener: namedArgs.containsKey('listener')
+                ? namedArgs['listener']
+                : null);
       case 'flushSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => flushSemantics();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -216,7 +280,7 @@ extension PipelineOwnerBinding on PipelineOwner {
         rootNode = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -228,9 +292,10 @@ class DiagnosticsDebugCreatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DiagnosticsDebugCreator':
-        return ({positionalArgs, namedArgs, typeArgs}) => DiagnosticsDebugCreator(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DiagnosticsDebugCreator(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -244,7 +309,7 @@ extension DiagnosticsDebugCreatorBinding on DiagnosticsDebugCreator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DiagnosticsDebugCreator');
+        return const HTType('DiagnosticsDebugCreator');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -284,33 +349,49 @@ extension DiagnosticsDebugCreatorBinding on DiagnosticsDebugCreator {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/paragraph.g.dart b/lib/bindings/flutter/rendering/paragraph.g.dart
index 8ad0426..d8e9ff3 100644
--- a/lib/bindings/flutter/rendering/paragraph.g.dart
+++ b/lib/bindings/flutter/rendering/paragraph.g.dart
@@ -20,7 +20,7 @@ class TextOverflowAutoBinding extends HTExternalClass {
       case 'TextOverflow.visible':
         return TextOverflow.visible;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,13 +28,14 @@ class TextOverflowAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextOverflow');
+        return const HTType('TextOverflow');
       case 'index':
         return (instance as TextOverflow).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextOverflow).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextOverflow).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,7 +49,7 @@ class TextParentDataAutoBinding extends HTExternalClass {
       case 'TextParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => TextParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,7 +68,7 @@ extension TextParentDataBinding on TextParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextParentData');
+        return const HTType('TextParentData');
       case 'scale':
         return scale;
       case 'offset':
@@ -77,7 +78,7 @@ extension TextParentDataBinding on TextParentData {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -90,21 +91,23 @@ extension TextParentDataBinding on TextParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class PlaceholderSpanIndexSemanticsTagAutoBinding extends HTExternalClass {
-  PlaceholderSpanIndexSemanticsTagAutoBinding() : super('PlaceholderSpanIndexSemanticsTag');
+  PlaceholderSpanIndexSemanticsTagAutoBinding()
+      : super('PlaceholderSpanIndexSemanticsTag');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PlaceholderSpanIndexSemanticsTag':
-        return ({positionalArgs, namedArgs, typeArgs}) => PlaceholderSpanIndexSemanticsTag(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PlaceholderSpanIndexSemanticsTag(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -114,11 +117,12 @@ class PlaceholderSpanIndexSemanticsTagAutoBinding extends HTExternalClass {
   }
 }
 
-extension PlaceholderSpanIndexSemanticsTagBinding on PlaceholderSpanIndexSemanticsTag {
+extension PlaceholderSpanIndexSemanticsTagBinding
+    on PlaceholderSpanIndexSemanticsTag {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlaceholderSpanIndexSemanticsTag');
+        return const HTType('PlaceholderSpanIndexSemanticsTag');
       case 'index':
         return index;
       case 'name':
@@ -128,7 +132,7 @@ extension PlaceholderSpanIndexSemanticsTagBinding on PlaceholderSpanIndexSemanti
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -140,21 +144,40 @@ class RenderParagraphAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderParagraph':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderParagraph(positionalArgs[0],
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
+        return ({positionalArgs, namedArgs, typeArgs}) => RenderParagraph(
+            positionalArgs[0],
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
             textDirection: namedArgs['textDirection'],
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : true,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : TextOverflow.clip,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textWidthBasis:
-                namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : TextWidthBasis.parent,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null);
+            softWrap: namedArgs.containsKey('softWrap')
+                ? namedArgs['softWrap']
+                : true,
+            overflow: namedArgs.containsKey('overflow')
+                ? namedArgs['overflow']
+                : TextOverflow.clip,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : TextWidthBasis.parent,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
+            children: namedArgs.containsKey('children')
+                ? List<RenderBox>.from(namedArgs['children'])
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -170,8 +193,8 @@ class RenderParagraphAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -180,7 +203,7 @@ extension RenderParagraphBinding on RenderParagraph {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderParagraph');
+        return const HTType('RenderParagraph');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -256,81 +279,113 @@ extension RenderParagraphBinding on RenderParagraph {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'systemFontsDidChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => systemFontsDidChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            systemFontsDidChange();
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getOffsetForCaret':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetForCaret(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getOffsetForCaret(positionalArgs[0], positionalArgs[1]);
       case 'getFullHeightForCaret':
-        return ({positionalArgs, namedArgs, typeArgs}) => getFullHeightForCaret(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getFullHeightForCaret(positionalArgs[0]);
       case 'getBoxesForSelection':
-        return ({positionalArgs, namedArgs, typeArgs}) => getBoxesForSelection(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getBoxesForSelection(positionalArgs[0]);
       case 'getPositionForOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPositionForOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPositionForOffset(positionalArgs[0]);
       case 'getWordBoundary':
-        return ({positionalArgs, namedArgs, typeArgs}) => getWordBoundary(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getWordBoundary(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            describeSemanticsConfiguration(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -338,127 +393,203 @@ extension RenderParagraphBinding on RenderParagraph {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -504,7 +635,7 @@ extension RenderParagraphBinding on RenderParagraph {
         textHeightBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/performance_overlay.g.dart b/lib/bindings/flutter/rendering/performance_overlay.g.dart
index 353dd8f..f2748d3 100644
--- a/lib/bindings/flutter/rendering/performance_overlay.g.dart
+++ b/lib/bindings/flutter/rendering/performance_overlay.g.dart
@@ -20,7 +20,7 @@ class PerformanceOverlayOptionAutoBinding extends HTExternalClass {
       case 'PerformanceOverlayOption.visualizeEngineStatistics':
         return PerformanceOverlayOption.visualizeEngineStatistics;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,13 +28,14 @@ class PerformanceOverlayOptionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PerformanceOverlayOption');
+        return const HTType('PerformanceOverlayOption');
       case 'index':
         return (instance as PerformanceOverlayOption).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PerformanceOverlayOption).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PerformanceOverlayOption).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,17 +47,25 @@ class RenderPerformanceOverlayAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderPerformanceOverlay':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderPerformanceOverlay(
-            optionsMask: namedArgs.containsKey('optionsMask') ? namedArgs['optionsMask'] : 0,
-            rasterizerThreshold: namedArgs.containsKey('rasterizerThreshold') ? namedArgs['rasterizerThreshold'] : 0,
-            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
-                ? namedArgs['checkerboardRasterCacheImages']
-                : false,
-            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers')
-                ? namedArgs['checkerboardOffscreenLayers']
-                : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderPerformanceOverlay(
+                optionsMask: namedArgs.containsKey('optionsMask')
+                    ? namedArgs['optionsMask']
+                    : 0,
+                rasterizerThreshold:
+                    namedArgs.containsKey('rasterizerThreshold')
+                        ? namedArgs['rasterizerThreshold']
+                        : 0,
+                checkerboardRasterCacheImages:
+                    namedArgs.containsKey('checkerboardRasterCacheImages')
+                        ? namedArgs['checkerboardRasterCacheImages']
+                        : false,
+                checkerboardOffscreenLayers:
+                    namedArgs.containsKey('checkerboardOffscreenLayers')
+                        ? namedArgs['checkerboardOffscreenLayers']
+                        : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -72,8 +81,8 @@ class RenderPerformanceOverlayAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -82,7 +91,7 @@ extension RenderPerformanceOverlayBinding on RenderPerformanceOverlay {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderPerformanceOverlay');
+        return const HTType('RenderPerformanceOverlay');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -140,42 +149,63 @@ extension RenderPerformanceOverlayBinding on RenderPerformanceOverlay {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
@@ -183,102 +213,165 @@ extension RenderPerformanceOverlayBinding on RenderPerformanceOverlay {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -288,7 +381,7 @@ extension RenderPerformanceOverlayBinding on RenderPerformanceOverlay {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -313,7 +406,7 @@ extension RenderPerformanceOverlayBinding on RenderPerformanceOverlay {
         checkerboardOffscreenLayers = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/platform_view.g.dart b/lib/bindings/flutter/rendering/platform_view.g.dart
index 7cd628f..d8f2c8d 100644
--- a/lib/bindings/flutter/rendering/platform_view.g.dart
+++ b/lib/bindings/flutter/rendering/platform_view.g.dart
@@ -5,7 +5,8 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/animation.dart';
 
 class PlatformViewHitTestBehaviorAutoBinding extends HTExternalClass {
-  PlatformViewHitTestBehaviorAutoBinding() : super('PlatformViewHitTestBehavior');
+  PlatformViewHitTestBehaviorAutoBinding()
+      : super('PlatformViewHitTestBehavior');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
@@ -19,7 +20,7 @@ class PlatformViewHitTestBehaviorAutoBinding extends HTExternalClass {
       case 'PlatformViewHitTestBehavior.transparent':
         return PlatformViewHitTestBehavior.transparent;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +28,14 @@ class PlatformViewHitTestBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformViewHitTestBehavior');
+        return const HTType('PlatformViewHitTestBehavior');
       case 'index':
         return (instance as PlatformViewHitTestBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as PlatformViewHitTestBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as PlatformViewHitTestBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -49,9 +51,11 @@ class RenderAndroidViewAutoBinding extends HTExternalClass {
             viewController: namedArgs['viewController'],
             hitTestBehavior: namedArgs['hitTestBehavior'],
             gestureRecognizers: namedArgs['gestureRecognizers'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,8 +71,8 @@ class RenderAndroidViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -77,7 +81,7 @@ extension RenderAndroidViewBinding on RenderAndroidView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderAndroidView');
+        return const HTType('RenderAndroidView');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -139,145 +143,228 @@ extension RenderAndroidViewBinding on RenderAndroidView {
       case 'parent':
         return parent;
       case 'updateGestureRecognizers':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateGestureRecognizers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateGestureRecognizers(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
-      case 'hitTest':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+            describeSemanticsConfiguration(positionalArgs[0]);
+      case 'hitTest':
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -285,7 +372,7 @@ extension RenderAndroidViewBinding on RenderAndroidView {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -307,7 +394,7 @@ extension RenderAndroidViewBinding on RenderAndroidView {
         hitTestBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -324,7 +411,7 @@ class RenderUiKitViewAutoBinding extends HTExternalClass {
             hitTestBehavior: namedArgs['hitTestBehavior'],
             gestureRecognizers: namedArgs['gestureRecognizers']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -340,8 +427,8 @@ class RenderUiKitViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -350,7 +437,7 @@ extension RenderUiKitViewBinding on RenderUiKitView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderUiKitView');
+        return const HTType('RenderUiKitView');
       case 'hitTestBehavior':
         return hitTestBehavior;
       case 'parentData':
@@ -404,49 +491,74 @@ extension RenderUiKitViewBinding on RenderUiKitView {
       case 'parent':
         return parent;
       case 'updateGestureRecognizers':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateGestureRecognizers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateGestureRecognizers(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
-      case 'hitTest':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+            paint(positionalArgs[0], positionalArgs[1]);
+      case 'hitTest':
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
@@ -454,95 +566,153 @@ extension RenderUiKitViewBinding on RenderUiKitView {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -550,7 +720,7 @@ extension RenderUiKitViewBinding on RenderUiKitView {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -569,7 +739,7 @@ extension RenderUiKitViewBinding on RenderUiKitView {
         viewController = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -586,7 +756,7 @@ class PlatformViewRenderBoxAutoBinding extends HTExternalClass {
             hitTestBehavior: namedArgs['hitTestBehavior'],
             gestureRecognizers: namedArgs['gestureRecognizers']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -602,8 +772,8 @@ class PlatformViewRenderBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -612,7 +782,7 @@ extension PlatformViewRenderBoxBinding on PlatformViewRenderBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformViewRenderBox');
+        return const HTType('PlatformViewRenderBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -670,47 +840,71 @@ extension PlatformViewRenderBoxBinding on PlatformViewRenderBox {
       case 'parent':
         return parent;
       case 'updateGestureRecognizers':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateGestureRecognizers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateGestureRecognizers(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
-      case 'hitTest':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+            describeSemanticsConfiguration(positionalArgs[0]);
+      case 'hitTest':
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
@@ -718,97 +912,156 @@ extension PlatformViewRenderBoxBinding on PlatformViewRenderBox {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -816,7 +1069,7 @@ extension PlatformViewRenderBoxBinding on PlatformViewRenderBox {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -835,7 +1088,7 @@ extension PlatformViewRenderBoxBinding on PlatformViewRenderBox {
         hitTestBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/proxy_box.g.dart b/lib/bindings/flutter/rendering/proxy_box.g.dart
index 7e8d4be..6165337 100644
--- a/lib/bindings/flutter/rendering/proxy_box.g.dart
+++ b/lib/bindings/flutter/rendering/proxy_box.g.dart
@@ -19,7 +19,7 @@ class HitTestBehaviorAutoBinding extends HTExternalClass {
       case 'HitTestBehavior.translucent':
         return HitTestBehavior.translucent;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +27,14 @@ class HitTestBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HitTestBehavior');
+        return const HTType('HitTestBehavior');
       case 'index':
         return (instance as HitTestBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as HitTestBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as HitTestBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,7 +52,7 @@ class DecorationPositionAutoBinding extends HTExternalClass {
       case 'DecorationPosition.foreground':
         return DecorationPosition.foreground;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -59,13 +60,14 @@ class DecorationPositionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DecorationPosition');
+        return const HTType('DecorationPosition');
       case 'index':
         return (instance as DecorationPosition).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DecorationPosition).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DecorationPosition).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -77,10 +79,10 @@ class RenderProxyBoxAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderProxyBox':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderProxyBox(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => RenderProxyBox(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -96,8 +98,8 @@ class RenderProxyBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -106,7 +108,7 @@ extension RenderProxyBoxBinding on RenderProxyBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderProxyBox');
+        return const HTType('RenderProxyBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -154,164 +156,254 @@ extension RenderProxyBoxBinding on RenderProxyBox {
       case 'parent':
         return parent;
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -324,7 +416,7 @@ extension RenderProxyBoxBinding on RenderProxyBox {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -340,7 +432,7 @@ class RenderConstrainedBoxAutoBinding extends HTExternalClass {
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             additionalConstraints: namedArgs['additionalConstraints']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -356,8 +448,8 @@ class RenderConstrainedBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -366,7 +458,7 @@ extension RenderConstrainedBoxBinding on RenderConstrainedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderConstrainedBox');
+        return const HTType('RenderConstrainedBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -416,166 +508,257 @@ extension RenderConstrainedBoxBinding on RenderConstrainedBox {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -591,7 +774,7 @@ extension RenderConstrainedBoxBinding on RenderConstrainedBox {
         additionalConstraints = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -605,10 +788,14 @@ class RenderLimitedBoxAutoBinding extends HTExternalClass {
       case 'RenderLimitedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderLimitedBox(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            maxWidth: namedArgs.containsKey('maxWidth') ? namedArgs['maxWidth'] : double.infinity,
-            maxHeight: namedArgs.containsKey('maxHeight') ? namedArgs['maxHeight'] : double.infinity);
+            maxWidth: namedArgs.containsKey('maxWidth')
+                ? namedArgs['maxWidth']
+                : double.infinity,
+            maxHeight: namedArgs.containsKey('maxHeight')
+                ? namedArgs['maxHeight']
+                : double.infinity);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -624,8 +811,8 @@ class RenderLimitedBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -634,7 +821,7 @@ extension RenderLimitedBoxBinding on RenderLimitedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderLimitedBox');
+        return const HTType('RenderLimitedBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -686,164 +873,254 @@ extension RenderLimitedBoxBinding on RenderLimitedBox {
       case 'parent':
         return parent;
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -862,7 +1139,7 @@ extension RenderLimitedBoxBinding on RenderLimitedBox {
         maxHeight = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -875,9 +1152,10 @@ class RenderAspectRatioAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderAspectRatio':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderAspectRatio(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null, aspectRatio: namedArgs['aspectRatio']);
+            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
+            aspectRatio: namedArgs['aspectRatio']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -893,8 +1171,8 @@ class RenderAspectRatioAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -903,7 +1181,7 @@ extension RenderAspectRatioBinding on RenderAspectRatio {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderAspectRatio');
+        return const HTType('RenderAspectRatio');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -953,164 +1231,254 @@ extension RenderAspectRatioBinding on RenderAspectRatio {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1126,7 +1494,7 @@ extension RenderAspectRatioBinding on RenderAspectRatio {
         aspectRatio = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1139,11 +1507,15 @@ class RenderIntrinsicWidthAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderIntrinsicWidth':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderIntrinsicWidth(
-            stepWidth: namedArgs.containsKey('stepWidth') ? namedArgs['stepWidth'] : null,
-            stepHeight: namedArgs.containsKey('stepHeight') ? namedArgs['stepHeight'] : null,
+            stepWidth: namedArgs.containsKey('stepWidth')
+                ? namedArgs['stepWidth']
+                : null,
+            stepHeight: namedArgs.containsKey('stepHeight')
+                ? namedArgs['stepHeight']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1159,8 +1531,8 @@ class RenderIntrinsicWidthAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -1169,7 +1541,7 @@ extension RenderIntrinsicWidthBinding on RenderIntrinsicWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderIntrinsicWidth');
+        return const HTType('RenderIntrinsicWidth');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -1221,164 +1593,254 @@ extension RenderIntrinsicWidthBinding on RenderIntrinsicWidth {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1397,7 +1859,7 @@ extension RenderIntrinsicWidthBinding on RenderIntrinsicWidth {
         stepHeight = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1409,10 +1871,10 @@ class RenderIntrinsicHeightAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderIntrinsicHeight(child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => RenderIntrinsicHeight(
+            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1428,8 +1890,8 @@ class RenderIntrinsicHeightAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -1438,7 +1900,7 @@ extension RenderIntrinsicHeightBinding on RenderIntrinsicHeight {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderIntrinsicHeight');
+        return const HTType('RenderIntrinsicHeight');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -1486,164 +1948,254 @@ extension RenderIntrinsicHeightBinding on RenderIntrinsicHeight {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1656,7 +2208,7 @@ extension RenderIntrinsicHeightBinding on RenderIntrinsicHeight {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1669,12 +2221,15 @@ class RenderOpacityAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderOpacity':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderOpacity(
-            opacity: namedArgs.containsKey('opacity') ? namedArgs['opacity'] : 1.0,
+            opacity:
+                namedArgs.containsKey('opacity') ? namedArgs['opacity'] : 1.0,
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1690,8 +2245,8 @@ class RenderOpacityAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -1700,7 +2255,7 @@ extension RenderOpacityBinding on RenderOpacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderOpacity');
+        return const HTType('RenderOpacity');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -1754,164 +2309,254 @@ extension RenderOpacityBinding on RenderOpacity {
       case 'parent':
         return parent;
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1930,7 +2575,7 @@ extension RenderOpacityBinding on RenderOpacity {
         alwaysIncludeSemantics = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1945,10 +2590,12 @@ class RenderAnimatedOpacityAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RenderAnimatedOpacity(
             opacity: namedArgs['opacity'],
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1964,8 +2611,8 @@ class RenderAnimatedOpacityAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -1974,7 +2621,7 @@ extension RenderAnimatedOpacityBinding on RenderAnimatedOpacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderAnimatedOpacity');
+        return const HTType('RenderAnimatedOpacity');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -2028,164 +2675,254 @@ extension RenderAnimatedOpacityBinding on RenderAnimatedOpacity {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2198,7 +2935,7 @@ extension RenderAnimatedOpacityBinding on RenderAnimatedOpacity {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2213,9 +2950,11 @@ class RenderShaderMaskAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RenderShaderMask(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             shaderCallback: namedArgs['shaderCallback'],
-            blendMode: namedArgs.containsKey('blendMode') ? namedArgs['blendMode'] : BlendMode.modulate);
+            blendMode: namedArgs.containsKey('blendMode')
+                ? namedArgs['blendMode']
+                : BlendMode.modulate);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2231,10 +2970,10 @@ class RenderShaderMaskAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ShaderCallback': (HTFunction function) =>
-          (bounds) => function.call(positionalArgs: [bounds], namedArgs: const {}) as Shader,
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'ShaderCallback': (HTFunction function) => (bounds) => function
+          .call(positionalArgs: [bounds], namedArgs: const {}) as Shader,
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -2243,7 +2982,7 @@ extension RenderShaderMaskBinding on RenderShaderMask {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderShaderMask');
+        return const HTType('RenderShaderMask');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -2299,164 +3038,254 @@ extension RenderShaderMaskBinding on RenderShaderMask {
       case 'parent':
         return parent;
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2475,7 +3304,7 @@ extension RenderShaderMaskBinding on RenderShaderMask {
         blendMode = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2488,9 +3317,10 @@ class RenderBackdropFilterAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderBackdropFilter':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderBackdropFilter(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null, filter: namedArgs['filter']);
+            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
+            filter: namedArgs['filter']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2506,8 +3336,8 @@ class RenderBackdropFilterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -2516,7 +3346,7 @@ extension RenderBackdropFilterBinding on RenderBackdropFilter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderBackdropFilter');
+        return const HTType('RenderBackdropFilter');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -2570,164 +3400,254 @@ extension RenderBackdropFilterBinding on RenderBackdropFilter {
       case 'parent':
         return parent;
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2743,7 +3663,7 @@ extension RenderBackdropFilterBinding on RenderBackdropFilter {
         filter = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2757,9 +3677,11 @@ class ShapeBorderClipperAutoBinding extends HTExternalClass {
       case 'ShapeBorderClipper':
         return ({positionalArgs, namedArgs, typeArgs}) => ShapeBorderClipper(
             shape: namedArgs['shape'],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2770,7 +3692,8 @@ class ShapeBorderClipperAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -2779,25 +3702,30 @@ extension ShapeBorderClipperBinding on ShapeBorderClipper {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShapeBorderClipper');
+        return const HTType('ShapeBorderClipper');
       case 'shape':
         return shape;
       case 'textDirection':
         return textDirection;
       case 'getClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => getClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getClip(positionalArgs[0]);
       case 'shouldReclip':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldReclip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldReclip(positionalArgs[0]);
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'getApproximateClipRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => getApproximateClipRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getApproximateClipRect(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2811,10 +3739,13 @@ class RenderClipRectAutoBinding extends HTExternalClass {
       case 'RenderClipRect':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderClipRect(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias);
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2830,8 +3761,8 @@ class RenderClipRectAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -2840,7 +3771,7 @@ extension RenderClipRectBinding on RenderClipRect {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderClipRect');
+        return const HTType('RenderClipRect');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -2892,166 +3823,257 @@ extension RenderClipRectBinding on RenderClipRect {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3064,7 +4086,7 @@ extension RenderClipRectBinding on RenderClipRect {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3078,11 +4100,16 @@ class RenderClipRRectAutoBinding extends HTExternalClass {
       case 'RenderClipRRect':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderClipRRect(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : BorderRadius.zero,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias);
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : BorderRadius.zero,
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3098,8 +4125,8 @@ class RenderClipRRectAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -3108,7 +4135,7 @@ extension RenderClipRRectBinding on RenderClipRRect {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderClipRRect');
+        return const HTType('RenderClipRRect');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -3162,166 +4189,257 @@ extension RenderClipRRectBinding on RenderClipRRect {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3337,7 +4455,7 @@ extension RenderClipRRectBinding on RenderClipRRect {
         borderRadius = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3351,10 +4469,13 @@ class RenderClipOvalAutoBinding extends HTExternalClass {
       case 'RenderClipOval':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderClipOval(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias);
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3370,8 +4491,8 @@ class RenderClipOvalAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -3380,7 +4501,7 @@ extension RenderClipOvalBinding on RenderClipOval {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderClipOval');
+        return const HTType('RenderClipOval');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -3432,166 +4553,257 @@ extension RenderClipOvalBinding on RenderClipOval {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3604,7 +4816,7 @@ extension RenderClipOvalBinding on RenderClipOval {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3618,10 +4830,13 @@ class RenderClipPathAutoBinding extends HTExternalClass {
       case 'RenderClipPath':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderClipPath(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias);
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3637,8 +4852,8 @@ class RenderClipPathAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -3647,7 +4862,7 @@ extension RenderClipPathBinding on RenderClipPath {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderClipPath');
+        return const HTType('RenderClipPath');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -3699,166 +4914,257 @@ extension RenderClipPathBinding on RenderClipPath {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3871,7 +5177,7 @@ extension RenderClipPathBinding on RenderClipPath {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3885,14 +5191,24 @@ class RenderPhysicalModelAutoBinding extends HTExternalClass {
       case 'RenderPhysicalModel':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderPhysicalModel(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : BoxShape.rectangle,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 0.0,
+            shape: namedArgs.containsKey('shape')
+                ? namedArgs['shape']
+                : BoxShape.rectangle,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 0.0,
             color: namedArgs['color'],
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : const Color(0xFF000000));
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : const Color(0xFF000000));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3908,8 +5224,8 @@ class RenderPhysicalModelAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -3918,7 +5234,7 @@ extension RenderPhysicalModelBinding on RenderPhysicalModel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderPhysicalModel');
+        return const HTType('RenderPhysicalModel');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -3984,168 +5300,260 @@ extension RenderPhysicalModelBinding on RenderPhysicalModel {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4164,7 +5572,7 @@ extension RenderPhysicalModelBinding on RenderPhysicalModel {
         borderRadius = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4179,12 +5587,18 @@ class RenderPhysicalShapeAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RenderPhysicalShape(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             clipper: namedArgs['clipper'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 0.0,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 0.0,
             color: namedArgs['color'],
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : const Color(0xFF000000));
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : const Color(0xFF000000));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4200,8 +5614,8 @@ class RenderPhysicalShapeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -4210,7 +5624,7 @@ extension RenderPhysicalShapeBinding on RenderPhysicalShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderPhysicalShape');
+        return const HTType('RenderPhysicalShape');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -4272,168 +5686,260 @@ extension RenderPhysicalShapeBinding on RenderPhysicalShape {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4446,7 +5952,7 @@ extension RenderPhysicalShapeBinding on RenderPhysicalShape {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4460,12 +5966,15 @@ class RenderDecoratedBoxAutoBinding extends HTExternalClass {
       case 'RenderDecoratedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderDecoratedBox(
             decoration: namedArgs['decoration'],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : DecorationPosition.background,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : DecorationPosition.background,
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4481,8 +5990,8 @@ class RenderDecoratedBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -4491,7 +6000,7 @@ extension RenderDecoratedBoxBinding on RenderDecoratedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderDecoratedBox');
+        return const HTType('RenderDecoratedBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -4547,164 +6056,255 @@ extension RenderDecoratedBoxBinding on RenderDecoratedBox {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4726,7 +6326,7 @@ extension RenderDecoratedBoxBinding on RenderDecoratedBox {
         configuration = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4740,13 +6340,20 @@ class RenderTransformAutoBinding extends HTExternalClass {
       case 'RenderTransform':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderTransform(
             transform: namedArgs['transform'],
-            origin: namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
+            origin:
+                namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            transformHitTests: namedArgs.containsKey('transformHitTests')
+                ? namedArgs['transformHitTests']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4762,8 +6369,8 @@ class RenderTransformAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -4772,7 +6379,7 @@ extension RenderTransformBinding on RenderTransform {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderTransform');
+        return const HTType('RenderTransform');
       case 'transformHitTests':
         return transformHitTests;
       case 'parentData':
@@ -4830,176 +6437,273 @@ extension RenderTransformBinding on RenderTransform {
       case 'setIdentity':
         return ({positionalArgs, namedArgs, typeArgs}) => setIdentity();
       case 'rotateX':
-        return ({positionalArgs, namedArgs, typeArgs}) => rotateX(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rotateX(positionalArgs[0]);
       case 'rotateY':
-        return ({positionalArgs, namedArgs, typeArgs}) => rotateY(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rotateY(positionalArgs[0]);
       case 'rotateZ':
-        return ({positionalArgs, namedArgs, typeArgs}) => rotateZ(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rotateZ(positionalArgs[0]);
       case 'translate':
-        return ({positionalArgs, namedArgs, typeArgs}) => translate(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : 0.0, positionalArgs.length > 2 ? positionalArgs[2] : 0.0);
+        return ({positionalArgs, namedArgs, typeArgs}) => translate(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : 0.0,
+            positionalArgs.length > 2 ? positionalArgs[2] : 0.0);
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : null, positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => scale(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null,
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5027,7 +6731,7 @@ extension RenderTransformBinding on RenderTransform {
         transform = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -5040,13 +6744,21 @@ class RenderFittedBoxAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderFittedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderFittedBox(
-            fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : BoxFit.contain,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            fit: namedArgs.containsKey('fit')
+                ? namedArgs['fit']
+                : BoxFit.contain,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5062,8 +6774,8 @@ class RenderFittedBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -5072,7 +6784,7 @@ extension RenderFittedBoxBinding on RenderFittedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderFittedBox');
+        return const HTType('RenderFittedBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -5128,164 +6840,254 @@ extension RenderFittedBoxBinding on RenderFittedBox {
       case 'parent':
         return parent;
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5310,24 +7112,29 @@ extension RenderFittedBoxBinding on RenderFittedBox {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderFractionalTranslationAutoBinding extends HTExternalClass {
-  RenderFractionalTranslationAutoBinding() : super('RenderFractionalTranslation');
+  RenderFractionalTranslationAutoBinding()
+      : super('RenderFractionalTranslation');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderFractionalTranslation':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderFractionalTranslation(
-            translation: namedArgs['translation'],
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderFractionalTranslation(
+                translation: namedArgs['translation'],
+                transformHitTests: namedArgs.containsKey('transformHitTests')
+                    ? namedArgs['transformHitTests']
+                    : true,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5343,8 +7150,8 @@ class RenderFractionalTranslationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -5353,7 +7160,7 @@ extension RenderFractionalTranslationBinding on RenderFractionalTranslation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderFractionalTranslation');
+        return const HTType('RenderFractionalTranslation');
       case 'transformHitTests':
         return transformHitTests;
       case 'parentData':
@@ -5405,164 +7212,254 @@ extension RenderFractionalTranslationBinding on RenderFractionalTranslation {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5581,7 +7478,7 @@ extension RenderFractionalTranslationBinding on RenderFractionalTranslation {
         translation = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -5594,16 +7491,30 @@ class RenderPointerListenerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderPointerListener':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderPointerListener(
-            onPointerDown: namedArgs.containsKey('onPointerDown') ? namedArgs['onPointerDown'] : null,
-            onPointerMove: namedArgs.containsKey('onPointerMove') ? namedArgs['onPointerMove'] : null,
-            onPointerUp: namedArgs.containsKey('onPointerUp') ? namedArgs['onPointerUp'] : null,
-            onPointerHover: namedArgs.containsKey('onPointerHover') ? namedArgs['onPointerHover'] : null,
-            onPointerCancel: namedArgs.containsKey('onPointerCancel') ? namedArgs['onPointerCancel'] : null,
-            onPointerSignal: namedArgs.containsKey('onPointerSignal') ? namedArgs['onPointerSignal'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : HitTestBehavior.deferToChild,
+            onPointerDown: namedArgs.containsKey('onPointerDown')
+                ? namedArgs['onPointerDown']
+                : null,
+            onPointerMove: namedArgs.containsKey('onPointerMove')
+                ? namedArgs['onPointerMove']
+                : null,
+            onPointerUp: namedArgs.containsKey('onPointerUp')
+                ? namedArgs['onPointerUp']
+                : null,
+            onPointerHover: namedArgs.containsKey('onPointerHover')
+                ? namedArgs['onPointerHover']
+                : null,
+            onPointerCancel: namedArgs.containsKey('onPointerCancel')
+                ? namedArgs['onPointerCancel']
+                : null,
+            onPointerSignal: namedArgs.containsKey('onPointerSignal')
+                ? namedArgs['onPointerSignal']
+                : null,
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : HitTestBehavior.deferToChild,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5619,20 +7530,20 @@ class RenderPointerListenerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PointerDownEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerMoveEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerUpEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerHoverEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerCancelEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerSignalEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'PointerDownEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerMoveEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerUpEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerHoverEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerCancelEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerSignalEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -5641,7 +7552,7 @@ extension RenderPointerListenerBinding on RenderPointerListener {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderPointerListener');
+        return const HTType('RenderPointerListener');
       case 'onPointerDown':
         return onPointerDown;
       case 'onPointerMove':
@@ -5703,166 +7614,257 @@ extension RenderPointerListenerBinding on RenderPointerListener {
       case 'parent':
         return parent;
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'hitTest':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+            debugFillProperties(positionalArgs[0]);
+      case 'hitTest':
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5896,7 +7898,7 @@ extension RenderPointerListenerBinding on RenderPointerListener {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -5909,16 +7911,23 @@ class RenderMouseRegionAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderMouseRegion':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderMouseRegion(
-            onEnter: namedArgs.containsKey('onEnter') ? namedArgs['onEnter'] : null,
-            onHover: namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
-            onExit: namedArgs.containsKey('onExit') ? namedArgs['onExit'] : null,
-            cursor: namedArgs.containsKey('cursor') ? namedArgs['cursor'] : MouseCursor.defer,
-            validForMouseTracker:
-                namedArgs.containsKey('validForMouseTracker') ? namedArgs['validForMouseTracker'] : true,
-            opaque: namedArgs.containsKey('opaque') ? namedArgs['opaque'] : true,
+            onEnter:
+                namedArgs.containsKey('onEnter') ? namedArgs['onEnter'] : null,
+            onHover:
+                namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
+            onExit:
+                namedArgs.containsKey('onExit') ? namedArgs['onExit'] : null,
+            cursor: namedArgs.containsKey('cursor')
+                ? namedArgs['cursor']
+                : MouseCursor.defer,
+            validForMouseTracker: namedArgs.containsKey('validForMouseTracker')
+                ? namedArgs['validForMouseTracker']
+                : true,
+            opaque:
+                namedArgs.containsKey('opaque') ? namedArgs['opaque'] : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5934,14 +7943,14 @@ class RenderMouseRegionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PointerEnterEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerHoverEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerExitEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'PointerEnterEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerHoverEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerExitEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -5950,7 +7959,7 @@ extension RenderMouseRegionBinding on RenderMouseRegion {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderMouseRegion');
+        return const HTType('RenderMouseRegion');
       case 'onEnter':
         return onEnter;
       case 'onHover':
@@ -6010,164 +8019,254 @@ extension RenderMouseRegionBinding on RenderMouseRegion {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -6195,7 +8294,7 @@ extension RenderMouseRegionBinding on RenderMouseRegion {
         cursor = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -6207,10 +8306,10 @@ class RenderRepaintBoundaryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderRepaintBoundary':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderRepaintBoundary(child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => RenderRepaintBoundary(
+            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -6226,8 +8325,8 @@ class RenderRepaintBoundaryAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -6236,7 +8335,7 @@ extension RenderRepaintBoundaryBinding on RenderRepaintBoundary {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderRepaintBoundary');
+        return const HTType('RenderRepaintBoundary');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -6288,169 +8387,261 @@ extension RenderRepaintBoundaryBinding on RenderRepaintBoundary {
       case 'parent':
         return parent;
       case 'toImage':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toImage(pixelRatio: namedArgs.containsKey('pixelRatio') ? namedArgs['pixelRatio'] : 1.0);
+        return ({positionalArgs, namedArgs, typeArgs}) => toImage(
+            pixelRatio: namedArgs.containsKey('pixelRatio')
+                ? namedArgs['pixelRatio']
+                : 1.0);
       case 'debugResetMetrics':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetMetrics();
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -6463,7 +8654,7 @@ extension RenderRepaintBoundaryBinding on RenderRepaintBoundary {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -6477,10 +8668,14 @@ class RenderIgnorePointerAutoBinding extends HTExternalClass {
       case 'RenderIgnorePointer':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderIgnorePointer(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            ignoring: namedArgs.containsKey('ignoring') ? namedArgs['ignoring'] : true,
-            ignoringSemantics: namedArgs.containsKey('ignoringSemantics') ? namedArgs['ignoringSemantics'] : null);
+            ignoring: namedArgs.containsKey('ignoring')
+                ? namedArgs['ignoring']
+                : true,
+            ignoringSemantics: namedArgs.containsKey('ignoringSemantics')
+                ? namedArgs['ignoringSemantics']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -6496,8 +8691,8 @@ class RenderIgnorePointerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -6506,7 +8701,7 @@ extension RenderIgnorePointerBinding on RenderIgnorePointer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderIgnorePointer');
+        return const HTType('RenderIgnorePointer');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -6558,164 +8753,254 @@ extension RenderIgnorePointerBinding on RenderIgnorePointer {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -6734,7 +9019,7 @@ extension RenderIgnorePointerBinding on RenderIgnorePointer {
         ignoringSemantics = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -6747,10 +9032,12 @@ class RenderOffstageAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderOffstage':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderOffstage(
-            offstage: namedArgs.containsKey('offstage') ? namedArgs['offstage'] : true,
+            offstage: namedArgs.containsKey('offstage')
+                ? namedArgs['offstage']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -6766,8 +9053,8 @@ class RenderOffstageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -6776,7 +9063,7 @@ extension RenderOffstageBinding on RenderOffstage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderOffstage');
+        return const HTType('RenderOffstage');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -6828,164 +9115,254 @@ extension RenderOffstageBinding on RenderOffstage {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7001,7 +9378,7 @@ extension RenderOffstageBinding on RenderOffstage {
         offstage = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -7015,10 +9392,14 @@ class RenderAbsorbPointerAutoBinding extends HTExternalClass {
       case 'RenderAbsorbPointer':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderAbsorbPointer(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            absorbing: namedArgs.containsKey('absorbing') ? namedArgs['absorbing'] : true,
-            ignoringSemantics: namedArgs.containsKey('ignoringSemantics') ? namedArgs['ignoringSemantics'] : null);
+            absorbing: namedArgs.containsKey('absorbing')
+                ? namedArgs['absorbing']
+                : true,
+            ignoringSemantics: namedArgs.containsKey('ignoringSemantics')
+                ? namedArgs['ignoringSemantics']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7034,8 +9415,8 @@ class RenderAbsorbPointerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -7044,7 +9425,7 @@ extension RenderAbsorbPointerBinding on RenderAbsorbPointer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderAbsorbPointer');
+        return const HTType('RenderAbsorbPointer');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -7096,164 +9477,254 @@ extension RenderAbsorbPointerBinding on RenderAbsorbPointer {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7272,7 +9743,7 @@ extension RenderAbsorbPointerBinding on RenderAbsorbPointer {
         ignoringSemantics = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -7285,11 +9756,15 @@ class RenderMetaDataAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderMetaData':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderMetaData(
-            metaData: namedArgs.containsKey('metaData') ? namedArgs['metaData'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : HitTestBehavior.deferToChild,
+            metaData: namedArgs.containsKey('metaData')
+                ? namedArgs['metaData']
+                : null,
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : HitTestBehavior.deferToChild,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7305,8 +9780,8 @@ class RenderMetaDataAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -7315,7 +9790,7 @@ extension RenderMetaDataBinding on RenderMetaData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderMetaData');
+        return const HTType('RenderMetaData');
       case 'metaData':
         return metaData;
       case 'behavior':
@@ -7367,166 +9842,257 @@ extension RenderMetaDataBinding on RenderMetaData {
       case 'parent':
         return parent;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'hitTest':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+            debugFillProperties(positionalArgs[0]);
+      case 'hitTest':
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7545,29 +10111,43 @@ extension RenderMetaDataBinding on RenderMetaData {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderSemanticsGestureHandlerAutoBinding extends HTExternalClass {
-  RenderSemanticsGestureHandlerAutoBinding() : super('RenderSemanticsGestureHandler');
+  RenderSemanticsGestureHandlerAutoBinding()
+      : super('RenderSemanticsGestureHandler');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSemanticsGestureHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSemanticsGestureHandler(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onHorizontalDragUpdate:
-                namedArgs.containsKey('onHorizontalDragUpdate') ? namedArgs['onHorizontalDragUpdate'] : null,
-            onVerticalDragUpdate:
-                namedArgs.containsKey('onVerticalDragUpdate') ? namedArgs['onVerticalDragUpdate'] : null,
-            scrollFactor: namedArgs.containsKey('scrollFactor') ? namedArgs['scrollFactor'] : 0.8);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSemanticsGestureHandler(
+                child: namedArgs.containsKey('child')
+                    ? namedArgs['child']
+                    : null,
+                onTap: namedArgs.containsKey('onTap')
+                    ? namedArgs['onTap']
+                    : null,
+                onLongPress: namedArgs.containsKey('onLongPress')
+                    ? namedArgs['onLongPress']
+                    : null,
+                onHorizontalDragUpdate: namedArgs
+                        .containsKey('onHorizontalDragUpdate')
+                    ? namedArgs['onHorizontalDragUpdate']
+                    : null,
+                onVerticalDragUpdate:
+                    namedArgs.containsKey('onVerticalDragUpdate')
+                        ? namedArgs['onVerticalDragUpdate']
+                        : null,
+                scrollFactor: namedArgs.containsKey('scrollFactor')
+                    ? namedArgs['scrollFactor']
+                    : 0.8);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7583,22 +10163,24 @@ class RenderSemanticsGestureHandlerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
       'GestureLongPressCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureDragUpdateCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'GestureDragUpdateCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
 
-extension RenderSemanticsGestureHandlerBinding on RenderSemanticsGestureHandler {
+extension RenderSemanticsGestureHandlerBinding
+    on RenderSemanticsGestureHandler {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSemanticsGestureHandler');
+        return const HTType('RenderSemanticsGestureHandler');
       case 'scrollFactor':
         return scrollFactor;
       case 'parentData':
@@ -7658,166 +10240,257 @@ extension RenderSemanticsGestureHandlerBinding on RenderSemanticsGestureHandler
       case 'parent':
         return parent;
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7848,7 +10521,7 @@ extension RenderSemanticsGestureHandlerBinding on RenderSemanticsGestureHandler
         onVerticalDragUpdate = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -7862,41 +10535,89 @@ class RenderSemanticsAnnotationsAutoBinding extends HTExternalClass {
       case 'RenderSemanticsAnnotations':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderSemanticsAnnotations(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            container: namedArgs.containsKey('container') ? namedArgs['container'] : false,
-            explicitChildNodes: namedArgs.containsKey('explicitChildNodes') ? namedArgs['explicitChildNodes'] : false,
-            excludeSemantics: namedArgs.containsKey('excludeSemantics') ? namedArgs['excludeSemantics'] : false,
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
-            checked: namedArgs.containsKey('checked') ? namedArgs['checked'] : null,
-            toggled: namedArgs.containsKey('toggled') ? namedArgs['toggled'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : null,
-            button: namedArgs.containsKey('button') ? namedArgs['button'] : null,
-            slider: namedArgs.containsKey('slider') ? namedArgs['slider'] : null,
+            container: namedArgs.containsKey('container')
+                ? namedArgs['container']
+                : false,
+            explicitChildNodes: namedArgs.containsKey('explicitChildNodes')
+                ? namedArgs['explicitChildNodes']
+                : false,
+            excludeSemantics: namedArgs.containsKey('excludeSemantics')
+                ? namedArgs['excludeSemantics']
+                : false,
+            enabled:
+                namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
+            checked:
+                namedArgs.containsKey('checked') ? namedArgs['checked'] : null,
+            toggled:
+                namedArgs.containsKey('toggled') ? namedArgs['toggled'] : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : null,
+            button:
+                namedArgs.containsKey('button') ? namedArgs['button'] : null,
+            slider:
+                namedArgs.containsKey('slider') ? namedArgs['slider'] : null,
             link: namedArgs.containsKey('link') ? namedArgs['link'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            textField: namedArgs.containsKey('textField') ? namedArgs['textField'] : null,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : null,
-            focusable: namedArgs.containsKey('focusable') ? namedArgs['focusable'] : null,
-            focused: namedArgs.containsKey('focused') ? namedArgs['focused'] : null,
-            inMutuallyExclusiveGroup:
-                namedArgs.containsKey('inMutuallyExclusiveGroup') ? namedArgs['inMutuallyExclusiveGroup'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            multiline: namedArgs.containsKey('multiline') ? namedArgs['multiline'] : null,
-            scopesRoute: namedArgs.containsKey('scopesRoute') ? namedArgs['scopesRoute'] : null,
-            namesRoute: namedArgs.containsKey('namesRoute') ? namedArgs['namesRoute'] : null,
-            hidden: namedArgs.containsKey('hidden') ? namedArgs['hidden'] : null,
+            header:
+                namedArgs.containsKey('header') ? namedArgs['header'] : null,
+            textField: namedArgs.containsKey('textField')
+                ? namedArgs['textField']
+                : null,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : null,
+            focusable: namedArgs.containsKey('focusable')
+                ? namedArgs['focusable']
+                : null,
+            focused:
+                namedArgs.containsKey('focused') ? namedArgs['focused'] : null,
+            inMutuallyExclusiveGroup: namedArgs.containsKey('inMutuallyExclusiveGroup')
+                ? namedArgs['inMutuallyExclusiveGroup']
+                : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            multiline: namedArgs.containsKey('multiline')
+                ? namedArgs['multiline']
+                : null,
+            scopesRoute: namedArgs.containsKey('scopesRoute')
+                ? namedArgs['scopesRoute']
+                : null,
+            namesRoute: namedArgs.containsKey('namesRoute')
+                ? namedArgs['namesRoute']
+                : null,
+            hidden:
+                namedArgs.containsKey('hidden') ? namedArgs['hidden'] : null,
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            liveRegion: namedArgs.containsKey('liveRegion') ? namedArgs['liveRegion'] : null,
-            maxValueLength: namedArgs.containsKey('maxValueLength') ? namedArgs['maxValueLength'] : null,
-            currentValueLength: namedArgs.containsKey('currentValueLength') ? namedArgs['currentValueLength'] : null,
+            liveRegion: namedArgs.containsKey('liveRegion')
+                ? namedArgs['liveRegion']
+                : null,
+            maxValueLength: namedArgs.containsKey('maxValueLength')
+                ? namedArgs['maxValueLength']
+                : null,
+            currentValueLength: namedArgs.containsKey('currentValueLength')
+                ? namedArgs['currentValueLength']
+                : null,
             label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            increasedValue: namedArgs.containsKey('increasedValue') ? namedArgs['increasedValue'] : null,
-            decreasedValue: namedArgs.containsKey('decreasedValue') ? namedArgs['decreasedValue'] : null,
+            increasedValue: namedArgs.containsKey('increasedValue')
+                ? namedArgs['increasedValue']
+                : null,
+            decreasedValue: namedArgs.containsKey('decreasedValue')
+                ? namedArgs['decreasedValue']
+                : null,
             hint: namedArgs.containsKey('hint') ? namedArgs['hint'] : null,
-            hintOverrides: namedArgs.containsKey('hintOverrides') ? namedArgs['hintOverrides'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            sortKey: namedArgs.containsKey('sortKey') ? namedArgs['sortKey'] : null,
-            tagForChildren: namedArgs.containsKey('tagForChildren') ? namedArgs['tagForChildren'] : null,
+            hintOverrides: namedArgs.containsKey('hintOverrides')
+                ? namedArgs['hintOverrides']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            sortKey:
+                namedArgs.containsKey('sortKey') ? namedArgs['sortKey'] : null,
+            tagForChildren: namedArgs.containsKey('tagForChildren')
+                ? namedArgs['tagForChildren']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
             onDismiss: namedArgs.containsKey('onDismiss') ? namedArgs['onDismiss'] : null,
             onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
@@ -7909,25 +10630,16 @@ class RenderSemanticsAnnotationsAutoBinding extends HTExternalClass {
             onCopy: namedArgs.containsKey('onCopy') ? namedArgs['onCopy'] : null,
             onCut: namedArgs.containsKey('onCut') ? namedArgs['onCut'] : null,
             onPaste: namedArgs.containsKey('onPaste') ? namedArgs['onPaste'] : null,
-            onMoveCursorForwardByCharacter: namedArgs.containsKey('onMoveCursorForwardByCharacter')
-                ? namedArgs['onMoveCursorForwardByCharacter']
-                : null,
-            onMoveCursorBackwardByCharacter: namedArgs.containsKey('onMoveCursorBackwardByCharacter')
-                ? namedArgs['onMoveCursorBackwardByCharacter']
-                : null,
-            onMoveCursorForwardByWord:
-                namedArgs.containsKey('onMoveCursorForwardByWord') ? namedArgs['onMoveCursorForwardByWord'] : null,
-            onMoveCursorBackwardByWord:
-                namedArgs.containsKey('onMoveCursorBackwardByWord') ? namedArgs['onMoveCursorBackwardByWord'] : null,
+            onMoveCursorForwardByCharacter: namedArgs.containsKey('onMoveCursorForwardByCharacter') ? namedArgs['onMoveCursorForwardByCharacter'] : null,
+            onMoveCursorBackwardByCharacter: namedArgs.containsKey('onMoveCursorBackwardByCharacter') ? namedArgs['onMoveCursorBackwardByCharacter'] : null,
+            onMoveCursorForwardByWord: namedArgs.containsKey('onMoveCursorForwardByWord') ? namedArgs['onMoveCursorForwardByWord'] : null,
+            onMoveCursorBackwardByWord: namedArgs.containsKey('onMoveCursorBackwardByWord') ? namedArgs['onMoveCursorBackwardByWord'] : null,
             onSetSelection: namedArgs.containsKey('onSetSelection') ? namedArgs['onSetSelection'] : null,
-            onDidGainAccessibilityFocus:
-                namedArgs.containsKey('onDidGainAccessibilityFocus') ? namedArgs['onDidGainAccessibilityFocus'] : null,
-            onDidLoseAccessibilityFocus:
-                namedArgs.containsKey('onDidLoseAccessibilityFocus') ? namedArgs['onDidLoseAccessibilityFocus'] : null,
-            customSemanticsActions:
-                namedArgs.containsKey('customSemanticsActions') ? namedArgs['customSemanticsActions'] : null);
+            onDidGainAccessibilityFocus: namedArgs.containsKey('onDidGainAccessibilityFocus') ? namedArgs['onDidGainAccessibilityFocus'] : null,
+            onDidLoseAccessibilityFocus: namedArgs.containsKey('onDidLoseAccessibilityFocus') ? namedArgs['onDidLoseAccessibilityFocus'] : null,
+            customSemanticsActions: namedArgs.containsKey('customSemanticsActions') ? namedArgs['customSemanticsActions'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -7943,13 +10655,14 @@ class RenderSemanticsAnnotationsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'MoveCursorHandler': (HTFunction function) =>
-          (extendSelection) => function.call(positionalArgs: [extendSelection], namedArgs: const {}),
-      'SetSelectionHandler': (HTFunction function) =>
-          (selection) => function.call(positionalArgs: [selection], namedArgs: const {}),
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'MoveCursorHandler': (HTFunction function) => (extendSelection) =>
+          function.call(positionalArgs: [extendSelection], namedArgs: const {}),
+      'SetSelectionHandler': (HTFunction function) => (selection) =>
+          function.call(positionalArgs: [selection], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -7958,7 +10671,7 @@ extension RenderSemanticsAnnotationsBinding on RenderSemanticsAnnotations {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSemanticsAnnotations');
+        return const HTType('RenderSemanticsAnnotations');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -8114,166 +10827,257 @@ extension RenderSemanticsAnnotationsBinding on RenderSemanticsAnnotations {
       case 'parent':
         return parent;
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -8448,7 +11252,7 @@ extension RenderSemanticsAnnotationsBinding on RenderSemanticsAnnotations {
         customSemanticsActions = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -8462,9 +11266,11 @@ class RenderBlockSemanticsAutoBinding extends HTExternalClass {
       case 'RenderBlockSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderBlockSemantics(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            blocking: namedArgs.containsKey('blocking') ? namedArgs['blocking'] : true);
+            blocking: namedArgs.containsKey('blocking')
+                ? namedArgs['blocking']
+                : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -8480,8 +11286,8 @@ class RenderBlockSemanticsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -8490,7 +11296,7 @@ extension RenderBlockSemanticsBinding on RenderBlockSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderBlockSemantics');
+        return const HTType('RenderBlockSemantics');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -8540,166 +11346,257 @@ extension RenderBlockSemanticsBinding on RenderBlockSemantics {
       case 'parent':
         return parent;
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -8715,7 +11612,7 @@ extension RenderBlockSemanticsBinding on RenderBlockSemantics {
         blocking = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -8727,10 +11624,10 @@ class RenderMergeSemanticsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderMergeSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderMergeSemantics(child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => RenderMergeSemantics(
+            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -8746,8 +11643,8 @@ class RenderMergeSemanticsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -8756,7 +11653,7 @@ extension RenderMergeSemanticsBinding on RenderMergeSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderMergeSemantics');
+        return const HTType('RenderMergeSemantics');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -8804,166 +11701,257 @@ extension RenderMergeSemanticsBinding on RenderMergeSemantics {
       case 'parent':
         return parent;
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -8976,7 +11964,7 @@ extension RenderMergeSemanticsBinding on RenderMergeSemantics {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -8988,11 +11976,15 @@ class RenderExcludeSemanticsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderExcludeSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderExcludeSemantics(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            excluding: namedArgs.containsKey('excluding') ? namedArgs['excluding'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderExcludeSemantics(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                excluding: namedArgs.containsKey('excluding')
+                    ? namedArgs['excluding']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -9008,8 +12000,8 @@ class RenderExcludeSemanticsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -9018,7 +12010,7 @@ extension RenderExcludeSemanticsBinding on RenderExcludeSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderExcludeSemantics');
+        return const HTType('RenderExcludeSemantics');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -9068,164 +12060,254 @@ extension RenderExcludeSemanticsBinding on RenderExcludeSemantics {
       case 'parent':
         return parent;
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -9241,7 +12323,7 @@ extension RenderExcludeSemanticsBinding on RenderExcludeSemantics {
         excluding = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -9253,10 +12335,13 @@ class RenderIndexedSemanticsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderIndexedSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderIndexedSemantics(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null, index: namedArgs['index']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderIndexedSemantics(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                index: namedArgs['index']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -9272,8 +12357,8 @@ class RenderIndexedSemanticsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -9282,7 +12367,7 @@ extension RenderIndexedSemanticsBinding on RenderIndexedSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderIndexedSemantics');
+        return const HTType('RenderIndexedSemantics');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -9332,166 +12417,257 @@ extension RenderIndexedSemanticsBinding on RenderIndexedSemantics {
       case 'parent':
         return parent;
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -9507,7 +12683,7 @@ extension RenderIndexedSemanticsBinding on RenderIndexedSemantics {
         index = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -9520,9 +12696,10 @@ class RenderLeaderLayerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderLeaderLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderLeaderLayer(
-            link: namedArgs['link'], child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+            link: namedArgs['link'],
+            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -9538,8 +12715,8 @@ class RenderLeaderLayerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -9548,7 +12725,7 @@ extension RenderLeaderLayerBinding on RenderLeaderLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderLeaderLayer');
+        return const HTType('RenderLeaderLayer');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -9602,162 +12779,252 @@ extension RenderLeaderLayerBinding on RenderLeaderLayer {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -9773,7 +13040,7 @@ extension RenderLeaderLayerBinding on RenderLeaderLayer {
         link = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -9787,13 +13054,21 @@ class RenderFollowerLayerAutoBinding extends HTExternalClass {
       case 'RenderFollowerLayer':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderFollowerLayer(
             link: namedArgs['link'],
-            showWhenUnlinked: namedArgs.containsKey('showWhenUnlinked') ? namedArgs['showWhenUnlinked'] : true,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            leaderAnchor: namedArgs.containsKey('leaderAnchor') ? namedArgs['leaderAnchor'] : Alignment.topLeft,
-            followerAnchor: namedArgs.containsKey('followerAnchor') ? namedArgs['followerAnchor'] : Alignment.topLeft,
+            showWhenUnlinked: namedArgs.containsKey('showWhenUnlinked')
+                ? namedArgs['showWhenUnlinked']
+                : true,
+            offset: namedArgs.containsKey('offset')
+                ? namedArgs['offset']
+                : Offset.zero,
+            leaderAnchor: namedArgs.containsKey('leaderAnchor')
+                ? namedArgs['leaderAnchor']
+                : Alignment.topLeft,
+            followerAnchor: namedArgs.containsKey('followerAnchor')
+                ? namedArgs['followerAnchor']
+                : Alignment.topLeft,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -9809,8 +13084,8 @@ class RenderFollowerLayerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -9819,7 +13094,7 @@ extension RenderFollowerLayerBinding on RenderFollowerLayer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderFollowerLayer');
+        return const HTType('RenderFollowerLayer');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -9885,162 +13160,252 @@ extension RenderFollowerLayerBinding on RenderFollowerLayer {
       case 'getCurrentTransform':
         return ({positionalArgs, namedArgs, typeArgs}) => getCurrentTransform();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeSizeForNoChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeSizeForNoChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeSizeForNoChild(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -10068,7 +13433,7 @@ extension RenderFollowerLayerBinding on RenderFollowerLayer {
         followerAnchor = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/proxy_sliver.g.dart b/lib/bindings/flutter/rendering/proxy_sliver.g.dart
index 64ad2d9..9650b57 100644
--- a/lib/bindings/flutter/rendering/proxy_sliver.g.dart
+++ b/lib/bindings/flutter/rendering/proxy_sliver.g.dart
@@ -11,12 +11,16 @@ class RenderSliverOpacityAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderSliverOpacity':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverOpacity(
-            opacity: namedArgs.containsKey('opacity') ? namedArgs['opacity'] : 1.0,
+            opacity:
+                namedArgs.containsKey('opacity') ? namedArgs['opacity'] : 1.0,
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false,
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,8 +36,8 @@ class RenderSliverOpacityAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -42,7 +46,7 @@ extension RenderSliverOpacityBinding on RenderSliverOpacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverOpacity');
+        return const HTType('RenderSliverOpacity');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -96,137 +100,208 @@ extension RenderSliverOpacityBinding on RenderSliverOpacity {
       case 'parent':
         return parent;
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -245,7 +320,7 @@ extension RenderSliverOpacityBinding on RenderSliverOpacity {
         alwaysIncludeSemantics = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -257,12 +332,22 @@ class RenderSliverIgnorePointerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverIgnorePointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverIgnorePointer(
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null,
-            ignoring: namedArgs.containsKey('ignoring') ? namedArgs['ignoring'] : true,
-            ignoringSemantics: namedArgs.containsKey('ignoringSemantics') ? namedArgs['ignoringSemantics'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSliverIgnorePointer(
+                sliver: namedArgs.containsKey(
+                        'sliver')
+                    ? namedArgs['sliver']
+                    : null,
+                ignoring:
+                    namedArgs
+                            .containsKey('ignoring')
+                        ? namedArgs['ignoring']
+                        : true,
+                ignoringSemantics: namedArgs.containsKey('ignoringSemantics')
+                    ? namedArgs['ignoringSemantics']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -278,8 +363,8 @@ class RenderSliverIgnorePointerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -288,7 +373,7 @@ extension RenderSliverIgnorePointerBinding on RenderSliverIgnorePointer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverIgnorePointer');
+        return const HTType('RenderSliverIgnorePointer');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -340,137 +425,208 @@ extension RenderSliverIgnorePointerBinding on RenderSliverIgnorePointer {
       case 'parent':
         return parent;
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -489,7 +645,7 @@ extension RenderSliverIgnorePointerBinding on RenderSliverIgnorePointer {
         ignoringSemantics = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -502,10 +658,13 @@ class RenderSliverOffstageAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderSliverOffstage':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverOffstage(
-            offstage: namedArgs.containsKey('offstage') ? namedArgs['offstage'] : true,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+            offstage: namedArgs.containsKey('offstage')
+                ? namedArgs['offstage']
+                : true,
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -521,8 +680,8 @@ class RenderSliverOffstageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -531,7 +690,7 @@ extension RenderSliverOffstageBinding on RenderSliverOffstage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverOffstage');
+        return const HTType('RenderSliverOffstage');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -583,135 +742,206 @@ extension RenderSliverOffstageBinding on RenderSliverOffstage {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -727,25 +957,31 @@ extension RenderSliverOffstageBinding on RenderSliverOffstage {
         offstage = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderSliverAnimatedOpacityAutoBinding extends HTExternalClass {
-  RenderSliverAnimatedOpacityAutoBinding() : super('RenderSliverAnimatedOpacity');
+  RenderSliverAnimatedOpacityAutoBinding()
+      : super('RenderSliverAnimatedOpacity');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverAnimatedOpacity':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverAnimatedOpacity(
-            opacity: namedArgs['opacity'],
-            alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSliverAnimatedOpacity(
+                opacity: namedArgs['opacity'],
+                alwaysIncludeSemantics:
+                    namedArgs.containsKey('alwaysIncludeSemantics')
+                        ? namedArgs['alwaysIncludeSemantics']
+                        : false,
+                sliver: namedArgs.containsKey('sliver')
+                    ? namedArgs['sliver']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -761,8 +997,8 @@ class RenderSliverAnimatedOpacityAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -771,7 +1007,7 @@ extension RenderSliverAnimatedOpacityBinding on RenderSliverAnimatedOpacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverAnimatedOpacity');
+        return const HTType('RenderSliverAnimatedOpacity');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -825,137 +1061,208 @@ extension RenderSliverAnimatedOpacityBinding on RenderSliverAnimatedOpacity {
       case 'parent':
         return parent;
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -968,7 +1275,7 @@ extension RenderSliverAnimatedOpacityBinding on RenderSliverAnimatedOpacity {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/rotated_box.g.dart b/lib/bindings/flutter/rendering/rotated_box.g.dart
index 3d2796a..c58ee8a 100644
--- a/lib/bindings/flutter/rendering/rotated_box.g.dart
+++ b/lib/bindings/flutter/rendering/rotated_box.g.dart
@@ -11,9 +11,10 @@ class RenderRotatedBoxAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderRotatedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderRotatedBox(
-            quarterTurns: namedArgs['quarterTurns'], child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+            quarterTurns: namedArgs['quarterTurns'],
+            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,8 +30,8 @@ class RenderRotatedBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -39,7 +40,7 @@ extension RenderRotatedBoxBinding on RenderRotatedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderRotatedBox');
+        return const HTType('RenderRotatedBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -89,160 +90,248 @@ extension RenderRotatedBoxBinding on RenderRotatedBox {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -258,7 +347,7 @@ extension RenderRotatedBoxBinding on RenderRotatedBox {
         quarterTurns = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/shifted_box.g.dart b/lib/bindings/flutter/rendering/shifted_box.g.dart
index 2c1cfb3..0273592 100644
--- a/lib/bindings/flutter/rendering/shifted_box.g.dart
+++ b/lib/bindings/flutter/rendering/shifted_box.g.dart
@@ -12,10 +12,12 @@ class RenderPaddingAutoBinding extends HTExternalClass {
       case 'RenderPadding':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderPadding(
             padding: namedArgs['padding'],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,8 +33,8 @@ class RenderPaddingAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -41,7 +43,7 @@ extension RenderPaddingBinding on RenderPadding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderPadding');
+        return const HTType('RenderPadding');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -93,164 +95,254 @@ extension RenderPaddingBinding on RenderPadding {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -269,7 +361,7 @@ extension RenderPaddingBinding on RenderPadding {
         textDirection = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -283,12 +375,20 @@ class RenderPositionedBoxAutoBinding extends HTExternalClass {
       case 'RenderPositionedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderPositionedBox(
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            widthFactor: namedArgs.containsKey('widthFactor') ? namedArgs['widthFactor'] : null,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+            widthFactor: namedArgs.containsKey('widthFactor')
+                ? namedArgs['widthFactor']
+                : null,
+            heightFactor: namedArgs.containsKey('heightFactor')
+                ? namedArgs['heightFactor']
+                : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -304,8 +404,8 @@ class RenderPositionedBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -314,7 +414,7 @@ extension RenderPositionedBoxBinding on RenderPositionedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderPositionedBox');
+        return const HTType('RenderPositionedBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -370,164 +470,254 @@ extension RenderPositionedBoxBinding on RenderPositionedBox {
       case 'parent':
         return parent;
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -546,28 +736,43 @@ extension RenderPositionedBoxBinding on RenderPositionedBox {
         heightFactor = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderConstrainedOverflowBoxAutoBinding extends HTExternalClass {
-  RenderConstrainedOverflowBoxAutoBinding() : super('RenderConstrainedOverflowBox');
+  RenderConstrainedOverflowBoxAutoBinding()
+      : super('RenderConstrainedOverflowBox');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderConstrainedOverflowBox':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderConstrainedOverflowBox(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : null,
-            maxWidth: namedArgs.containsKey('maxWidth') ? namedArgs['maxWidth'] : null,
-            minHeight: namedArgs.containsKey('minHeight') ? namedArgs['minHeight'] : null,
-            maxHeight: namedArgs.containsKey('maxHeight') ? namedArgs['maxHeight'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderConstrainedOverflowBox(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                minWidth: namedArgs.containsKey('minWidth')
+                    ? namedArgs['minWidth']
+                    : null,
+                maxWidth: namedArgs.containsKey('maxWidth')
+                    ? namedArgs['maxWidth']
+                    : null,
+                minHeight: namedArgs.containsKey('minHeight')
+                    ? namedArgs['minHeight']
+                    : null,
+                maxHeight: namedArgs.containsKey('maxHeight')
+                    ? namedArgs['maxHeight']
+                    : null,
+                alignment: namedArgs.containsKey('alignment')
+                    ? namedArgs['alignment']
+                    : Alignment.center,
+                textDirection: namedArgs.containsKey('textDirection')
+                    ? namedArgs['textDirection']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -583,8 +788,8 @@ class RenderConstrainedOverflowBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -593,7 +798,7 @@ extension RenderConstrainedOverflowBoxBinding on RenderConstrainedOverflowBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderConstrainedOverflowBox');
+        return const HTType('RenderConstrainedOverflowBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -655,162 +860,251 @@ extension RenderConstrainedOverflowBoxBinding on RenderConstrainedOverflowBox {
       case 'parent':
         return parent;
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -835,7 +1129,7 @@ extension RenderConstrainedOverflowBoxBinding on RenderConstrainedOverflowBox {
         maxHeight = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -847,14 +1141,20 @@ class RenderUnconstrainedBoxAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderUnconstrainedBox':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderUnconstrainedBox(
-            alignment: namedArgs['alignment'],
-            textDirection: namedArgs['textDirection'],
-            constrainedAxis: namedArgs.containsKey('constrainedAxis') ? namedArgs['constrainedAxis'] : null,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderUnconstrainedBox(
+                alignment: namedArgs['alignment'],
+                textDirection: namedArgs['textDirection'],
+                constrainedAxis: namedArgs.containsKey('constrainedAxis')
+                    ? namedArgs['constrainedAxis']
+                    : null,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -870,8 +1170,8 @@ class RenderUnconstrainedBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -880,7 +1180,7 @@ extension RenderUnconstrainedBoxBinding on RenderUnconstrainedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderUnconstrainedBox');
+        return const HTType('RenderUnconstrainedBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -936,167 +1236,258 @@ extension RenderUnconstrainedBoxBinding on RenderUnconstrainedBox {
       case 'parent':
         return parent;
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'paintOverflowIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintOverflowIndicator(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3],
-            overflowHints:
-                namedArgs.containsKey('overflowHints') ? List<DiagnosticsNode>.from(namedArgs['overflowHints']) : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintOverflowIndicator(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3],
+                overflowHints: namedArgs.containsKey('overflowHints')
+                    ? List<DiagnosticsNode>.from(namedArgs['overflowHints'])
+                    : null);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1115,7 +1506,7 @@ extension RenderUnconstrainedBoxBinding on RenderUnconstrainedBox {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1127,13 +1518,19 @@ class RenderSizedOverflowBoxAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSizedOverflowBox':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSizedOverflowBox(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            requestedSize: namedArgs['requestedSize'],
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSizedOverflowBox(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                requestedSize: namedArgs['requestedSize'],
+                alignment: namedArgs.containsKey('alignment')
+                    ? namedArgs['alignment']
+                    : Alignment.center,
+                textDirection: namedArgs.containsKey('textDirection')
+                    ? namedArgs['textDirection']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1149,8 +1546,8 @@ class RenderSizedOverflowBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -1159,7 +1556,7 @@ extension RenderSizedOverflowBoxBinding on RenderSizedOverflowBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSizedOverflowBox');
+        return const HTType('RenderSizedOverflowBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -1213,162 +1610,251 @@ extension RenderSizedOverflowBoxBinding on RenderSizedOverflowBox {
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1384,26 +1870,37 @@ extension RenderSizedOverflowBoxBinding on RenderSizedOverflowBox {
         requestedSize = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderFractionallySizedOverflowBoxAutoBinding extends HTExternalClass {
-  RenderFractionallySizedOverflowBoxAutoBinding() : super('RenderFractionallySizedOverflowBox');
+  RenderFractionallySizedOverflowBoxAutoBinding()
+      : super('RenderFractionallySizedOverflowBox');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderFractionallySizedOverflowBox':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderFractionallySizedOverflowBox(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            widthFactor: namedArgs.containsKey('widthFactor') ? namedArgs['widthFactor'] : null,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderFractionallySizedOverflowBox(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                widthFactor: namedArgs.containsKey('widthFactor')
+                    ? namedArgs['widthFactor']
+                    : null,
+                heightFactor: namedArgs.containsKey('heightFactor')
+                    ? namedArgs['heightFactor']
+                    : null,
+                alignment: namedArgs.containsKey('alignment')
+                    ? namedArgs['alignment']
+                    : Alignment.center,
+                textDirection: namedArgs.containsKey('textDirection')
+                    ? namedArgs['textDirection']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1419,17 +1916,18 @@ class RenderFractionallySizedOverflowBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
 
-extension RenderFractionallySizedOverflowBoxBinding on RenderFractionallySizedOverflowBox {
+extension RenderFractionallySizedOverflowBoxBinding
+    on RenderFractionallySizedOverflowBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderFractionallySizedOverflowBox');
+        return const HTType('RenderFractionallySizedOverflowBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -1485,162 +1983,251 @@ extension RenderFractionallySizedOverflowBoxBinding on RenderFractionallySizedOv
       case 'parent':
         return parent;
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1659,22 +2246,26 @@ extension RenderFractionallySizedOverflowBoxBinding on RenderFractionallySizedOv
         heightFactor = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderCustomSingleChildLayoutBoxAutoBinding extends HTExternalClass {
-  RenderCustomSingleChildLayoutBoxAutoBinding() : super('RenderCustomSingleChildLayoutBox');
+  RenderCustomSingleChildLayoutBoxAutoBinding()
+      : super('RenderCustomSingleChildLayoutBox');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderCustomSingleChildLayoutBox':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderCustomSingleChildLayoutBox(
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null, delegate: namedArgs['delegate']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderCustomSingleChildLayoutBox(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                delegate: namedArgs['delegate']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1690,17 +2281,18 @@ class RenderCustomSingleChildLayoutBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
 
-extension RenderCustomSingleChildLayoutBoxBinding on RenderCustomSingleChildLayoutBox {
+extension RenderCustomSingleChildLayoutBoxBinding
+    on RenderCustomSingleChildLayoutBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderCustomSingleChildLayoutBox');
+        return const HTType('RenderCustomSingleChildLayoutBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -1750,162 +2342,251 @@ extension RenderCustomSingleChildLayoutBoxBinding on RenderCustomSingleChildLayo
       case 'parent':
         return parent;
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1921,7 +2602,7 @@ extension RenderCustomSingleChildLayoutBoxBinding on RenderCustomSingleChildLayo
         delegate = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1938,7 +2619,7 @@ class RenderBaselineAutoBinding extends HTExternalClass {
             baseline: namedArgs['baseline'],
             baselineType: namedArgs['baselineType']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1954,8 +2635,8 @@ class RenderBaselineAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -1964,7 +2645,7 @@ extension RenderBaselineBinding on RenderBaseline {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderBaseline');
+        return const HTType('RenderBaseline');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -2016,162 +2697,251 @@ extension RenderBaselineBinding on RenderBaseline {
       case 'parent':
         return parent;
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2190,7 +2960,7 @@ extension RenderBaselineBinding on RenderBaseline {
         baselineType = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver.g.dart b/lib/bindings/flutter/rendering/sliver.g.dart
index 4c0fab7..cf39b16 100644
--- a/lib/bindings/flutter/rendering/sliver.g.dart
+++ b/lib/bindings/flutter/rendering/sliver.g.dart
@@ -16,7 +16,7 @@ class GrowthDirectionAutoBinding extends HTExternalClass {
       case 'GrowthDirection.reverse':
         return GrowthDirection.reverse;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class GrowthDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GrowthDirection');
+        return const HTType('GrowthDirection');
       case 'index':
         return (instance as GrowthDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as GrowthDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as GrowthDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -56,7 +57,7 @@ class SliverConstraintsAutoBinding extends HTExternalClass {
             remainingCacheExtent: namedArgs['remainingCacheExtent'],
             cacheOrigin: namedArgs['cacheOrigin']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,8 +68,9 @@ class SliverConstraintsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InformationCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Iterable<DiagnosticsNode>,
+      'InformationCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Iterable<DiagnosticsNode>,
     };
   }
 }
@@ -77,7 +79,7 @@ extension SliverConstraintsBinding on SliverConstraints {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverConstraints');
+        return const HTType('SliverConstraints');
       case 'axisDirection':
         return axisDirection;
       case 'growthDirection':
@@ -114,37 +116,66 @@ extension SliverConstraintsBinding on SliverConstraints {
         return hashCode;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : null,
-            growthDirection: namedArgs.containsKey('growthDirection') ? namedArgs['growthDirection'] : null,
-            userScrollDirection: namedArgs.containsKey('userScrollDirection') ? namedArgs['userScrollDirection'] : null,
-            scrollOffset: namedArgs.containsKey('scrollOffset') ? namedArgs['scrollOffset'] : null,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : null,
+            growthDirection: namedArgs.containsKey('growthDirection')
+                ? namedArgs['growthDirection']
+                : null,
+            userScrollDirection: namedArgs.containsKey('userScrollDirection')
+                ? namedArgs['userScrollDirection']
+                : null,
+            scrollOffset: namedArgs.containsKey('scrollOffset')
+                ? namedArgs['scrollOffset']
+                : null,
             precedingScrollExtent:
-                namedArgs.containsKey('precedingScrollExtent') ? namedArgs['precedingScrollExtent'] : null,
-            overlap: namedArgs.containsKey('overlap') ? namedArgs['overlap'] : null,
-            remainingPaintExtent:
-                namedArgs.containsKey('remainingPaintExtent') ? namedArgs['remainingPaintExtent'] : null,
-            crossAxisExtent: namedArgs.containsKey('crossAxisExtent') ? namedArgs['crossAxisExtent'] : null,
-            crossAxisDirection: namedArgs.containsKey('crossAxisDirection') ? namedArgs['crossAxisDirection'] : null,
+                namedArgs.containsKey('precedingScrollExtent')
+                    ? namedArgs['precedingScrollExtent']
+                    : null,
+            overlap:
+                namedArgs.containsKey('overlap') ? namedArgs['overlap'] : null,
+            remainingPaintExtent: namedArgs.containsKey('remainingPaintExtent')
+                ? namedArgs['remainingPaintExtent']
+                : null,
+            crossAxisExtent: namedArgs.containsKey('crossAxisExtent')
+                ? namedArgs['crossAxisExtent']
+                : null,
+            crossAxisDirection: namedArgs.containsKey('crossAxisDirection')
+                ? namedArgs['crossAxisDirection']
+                : null,
             viewportMainAxisExtent:
-                namedArgs.containsKey('viewportMainAxisExtent') ? namedArgs['viewportMainAxisExtent'] : null,
-            remainingCacheExtent:
-                namedArgs.containsKey('remainingCacheExtent') ? namedArgs['remainingCacheExtent'] : null,
-            cacheOrigin: namedArgs.containsKey('cacheOrigin') ? namedArgs['cacheOrigin'] : null);
+                namedArgs.containsKey('viewportMainAxisExtent')
+                    ? namedArgs['viewportMainAxisExtent']
+                    : null,
+            remainingCacheExtent: namedArgs.containsKey('remainingCacheExtent')
+                ? namedArgs['remainingCacheExtent']
+                : null,
+            cacheOrigin: namedArgs.containsKey('cacheOrigin')
+                ? namedArgs['cacheOrigin']
+                : null);
       case 'asBoxConstraints':
         return ({positionalArgs, namedArgs, typeArgs}) => asBoxConstraints(
-            minExtent: namedArgs.containsKey('minExtent') ? namedArgs['minExtent'] : 0.0,
-            maxExtent: namedArgs.containsKey('maxExtent') ? namedArgs['maxExtent'] : double.infinity,
-            crossAxisExtent: namedArgs.containsKey('crossAxisExtent') ? namedArgs['crossAxisExtent'] : null);
+            minExtent: namedArgs.containsKey('minExtent')
+                ? namedArgs['minExtent']
+                : 0.0,
+            maxExtent: namedArgs.containsKey('maxExtent')
+                ? namedArgs['maxExtent']
+                : double.infinity,
+            crossAxisExtent: namedArgs.containsKey('crossAxisExtent')
+                ? namedArgs['crossAxisExtent']
+                : null);
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid(
-            isAppliedConstraint:
-                namedArgs.containsKey('isAppliedConstraint') ? namedArgs['isAppliedConstraint'] : false,
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null);
+            isAppliedConstraint: namedArgs.containsKey('isAppliedConstraint')
+                ? namedArgs['isAppliedConstraint']
+                : false,
+            informationCollector: namedArgs.containsKey('informationCollector')
+                ? namedArgs['informationCollector']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -157,23 +188,44 @@ class SliverGeometryAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SliverGeometry':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverGeometry(
-            scrollExtent: namedArgs.containsKey('scrollExtent') ? namedArgs['scrollExtent'] : 0.0,
-            paintExtent: namedArgs.containsKey('paintExtent') ? namedArgs['paintExtent'] : 0.0,
-            paintOrigin: namedArgs.containsKey('paintOrigin') ? namedArgs['paintOrigin'] : 0.0,
-            layoutExtent: namedArgs.containsKey('layoutExtent') ? namedArgs['layoutExtent'] : null,
-            maxPaintExtent: namedArgs.containsKey('maxPaintExtent') ? namedArgs['maxPaintExtent'] : 0.0,
+            scrollExtent: namedArgs.containsKey('scrollExtent')
+                ? namedArgs['scrollExtent']
+                : 0.0,
+            paintExtent: namedArgs.containsKey('paintExtent')
+                ? namedArgs['paintExtent']
+                : 0.0,
+            paintOrigin: namedArgs.containsKey('paintOrigin')
+                ? namedArgs['paintOrigin']
+                : 0.0,
+            layoutExtent: namedArgs.containsKey('layoutExtent')
+                ? namedArgs['layoutExtent']
+                : null,
+            maxPaintExtent: namedArgs.containsKey('maxPaintExtent')
+                ? namedArgs['maxPaintExtent']
+                : 0.0,
             maxScrollObstructionExtent:
-                namedArgs.containsKey('maxScrollObstructionExtent') ? namedArgs['maxScrollObstructionExtent'] : 0.0,
-            hitTestExtent: namedArgs.containsKey('hitTestExtent') ? namedArgs['hitTestExtent'] : null,
-            visible: namedArgs.containsKey('visible') ? namedArgs['visible'] : null,
-            hasVisualOverflow: namedArgs.containsKey('hasVisualOverflow') ? namedArgs['hasVisualOverflow'] : false,
+                namedArgs.containsKey('maxScrollObstructionExtent')
+                    ? namedArgs['maxScrollObstructionExtent']
+                    : 0.0,
+            hitTestExtent: namedArgs.containsKey('hitTestExtent')
+                ? namedArgs['hitTestExtent']
+                : null,
+            visible:
+                namedArgs.containsKey('visible') ? namedArgs['visible'] : null,
+            hasVisualOverflow: namedArgs.containsKey('hasVisualOverflow')
+                ? namedArgs['hasVisualOverflow']
+                : false,
             scrollOffsetCorrection:
-                namedArgs.containsKey('scrollOffsetCorrection') ? namedArgs['scrollOffsetCorrection'] : null,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null);
+                namedArgs.containsKey('scrollOffsetCorrection')
+                    ? namedArgs['scrollOffsetCorrection']
+                    : null,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null);
       case 'SliverGeometry.zero':
         return SliverGeometry.zero;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -184,8 +236,9 @@ class SliverGeometryAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InformationCollector': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Iterable<DiagnosticsNode>,
+      'InformationCollector': (HTFunction function) => () =>
+          function.call(positionalArgs: const [], namedArgs: const {})
+              as Iterable<DiagnosticsNode>,
     };
   }
 }
@@ -194,7 +247,7 @@ extension SliverGeometryBinding on SliverGeometry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverGeometry');
+        return const HTType('SliverGeometry');
       case 'scrollExtent':
         return scrollExtent;
       case 'paintOrigin':
@@ -219,21 +272,25 @@ extension SliverGeometryBinding on SliverGeometry {
         return cacheExtent;
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid(
-            informationCollector:
-                namedArgs.containsKey('informationCollector') ? namedArgs['informationCollector'] : null);
+            informationCollector: namedArgs.containsKey('informationCollector')
+                ? namedArgs['informationCollector']
+                : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -247,9 +304,10 @@ class SliverHitTestResultAutoBinding extends HTExternalClass {
       case 'SliverHitTestResult':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverHitTestResult();
       case 'SliverHitTestResult.wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverHitTestResult.wrap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverHitTestResult.wrap(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -260,9 +318,14 @@ class SliverHitTestResultAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SliverHitTest': (HTFunction function) => (result, {mainAxisPosition, crossAxisPosition}) => function.call(
-          positionalArgs: [result],
-          namedArgs: {'mainAxisPosition': mainAxisPosition, 'crossAxisPosition': crossAxisPosition}) as bool,
+      'SliverHitTest': (HTFunction function) => (result,
+              {mainAxisPosition, crossAxisPosition}) =>
+          function.call(positionalArgs: [
+            result
+          ], namedArgs: {
+            'mainAxisPosition': mainAxisPosition,
+            'crossAxisPosition': crossAxisPosition
+          }) as bool,
     };
   }
 }
@@ -271,23 +334,35 @@ extension SliverHitTestResultBinding on SliverHitTestResult {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverHitTestResult');
+        return const HTType('SliverHitTestResult');
       case 'path':
         return path;
       case 'addWithAxisOffset':
         return ({positionalArgs, namedArgs, typeArgs}) => addWithAxisOffset(
-            paintOffset: namedArgs.containsKey('paintOffset') ? namedArgs['paintOffset'] : null,
-            mainAxisOffset: namedArgs.containsKey('mainAxisOffset') ? namedArgs['mainAxisOffset'] : null,
-            crossAxisOffset: namedArgs.containsKey('crossAxisOffset') ? namedArgs['crossAxisOffset'] : null,
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null,
-            hitTest: namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
+            paintOffset: namedArgs.containsKey('paintOffset')
+                ? namedArgs['paintOffset']
+                : null,
+            mainAxisOffset: namedArgs.containsKey('mainAxisOffset')
+                ? namedArgs['mainAxisOffset']
+                : null,
+            crossAxisOffset: namedArgs.containsKey('crossAxisOffset')
+                ? namedArgs['crossAxisOffset']
+                : null,
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null,
+            hitTest:
+                namedArgs.containsKey('hitTest') ? namedArgs['hitTest'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -299,10 +374,12 @@ class SliverHitTestEntryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverHitTestEntry':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverHitTestEntry(positionalArgs[0],
-            mainAxisPosition: namedArgs['mainAxisPosition'], crossAxisPosition: namedArgs['crossAxisPosition']);
+        return ({positionalArgs, namedArgs, typeArgs}) => SliverHitTestEntry(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs['mainAxisPosition'],
+            crossAxisPosition: namedArgs['crossAxisPosition']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -316,7 +393,7 @@ extension SliverHitTestEntryBinding on SliverHitTestEntry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverHitTestEntry');
+        return const HTType('SliverHitTestEntry');
       case 'mainAxisPosition':
         return mainAxisPosition;
       case 'crossAxisPosition':
@@ -328,7 +405,7 @@ extension SliverHitTestEntryBinding on SliverHitTestEntry {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -340,9 +417,10 @@ class SliverLogicalParentDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverLogicalParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverLogicalParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverLogicalParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -361,13 +439,13 @@ extension SliverLogicalParentDataBinding on SliverLogicalParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverLogicalParentData');
+        return const HTType('SliverLogicalParentData');
       case 'layoutOffset':
         return layoutOffset;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -377,21 +455,23 @@ extension SliverLogicalParentDataBinding on SliverLogicalParentData {
         layoutOffset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class SliverLogicalContainerParentDataAutoBinding extends HTExternalClass {
-  SliverLogicalContainerParentDataAutoBinding() : super('SliverLogicalContainerParentData');
+  SliverLogicalContainerParentDataAutoBinding()
+      : super('SliverLogicalContainerParentData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverLogicalContainerParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverLogicalContainerParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverLogicalContainerParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -406,11 +486,12 @@ class SliverLogicalContainerParentDataAutoBinding extends HTExternalClass {
   }
 }
 
-extension SliverLogicalContainerParentDataBinding on SliverLogicalContainerParentData {
+extension SliverLogicalContainerParentDataBinding
+    on SliverLogicalContainerParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverLogicalContainerParentData');
+        return const HTType('SliverLogicalContainerParentData');
       case 'layoutOffset':
         return layoutOffset;
       case 'detach':
@@ -418,7 +499,7 @@ extension SliverLogicalContainerParentDataBinding on SliverLogicalContainerParen
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -428,7 +509,7 @@ extension SliverLogicalContainerParentDataBinding on SliverLogicalContainerParen
         layoutOffset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -440,9 +521,10 @@ class SliverPhysicalParentDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverPhysicalParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverPhysicalParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverPhysicalParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -461,15 +543,16 @@ extension SliverPhysicalParentDataBinding on SliverPhysicalParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverPhysicalParentData');
+        return const HTType('SliverPhysicalParentData');
       case 'paintOffset':
         return paintOffset;
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -479,21 +562,23 @@ extension SliverPhysicalParentDataBinding on SliverPhysicalParentData {
         paintOffset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class SliverPhysicalContainerParentDataAutoBinding extends HTExternalClass {
-  SliverPhysicalContainerParentDataAutoBinding() : super('SliverPhysicalContainerParentData');
+  SliverPhysicalContainerParentDataAutoBinding()
+      : super('SliverPhysicalContainerParentData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverPhysicalContainerParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverPhysicalContainerParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverPhysicalContainerParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -508,21 +593,23 @@ class SliverPhysicalContainerParentDataAutoBinding extends HTExternalClass {
   }
 }
 
-extension SliverPhysicalContainerParentDataBinding on SliverPhysicalContainerParentData {
+extension SliverPhysicalContainerParentDataBinding
+    on SliverPhysicalContainerParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverPhysicalContainerParentData');
+        return const HTType('SliverPhysicalContainerParentData');
       case 'paintOffset':
         return paintOffset;
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -532,7 +619,7 @@ extension SliverPhysicalContainerParentDataBinding on SliverPhysicalContainerPar
         paintOffset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -545,9 +632,11 @@ class RenderSliverToBoxAdapterAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderSliverToBoxAdapter':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderSliverToBoxAdapter(child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+            RenderSliverToBoxAdapter(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -563,8 +652,8 @@ class RenderSliverToBoxAdapterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -573,7 +662,7 @@ extension RenderSliverToBoxAdapterBinding on RenderSliverToBoxAdapter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverToBoxAdapter');
+        return const HTType('RenderSliverToBoxAdapter');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -623,135 +712,206 @@ extension RenderSliverToBoxAdapterBinding on RenderSliverToBoxAdapter {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -764,7 +924,7 @@ extension RenderSliverToBoxAdapterBinding on RenderSliverToBoxAdapter {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver_fill.g.dart b/lib/bindings/flutter/rendering/sliver_fill.g.dart
index 6c8d42a..6f0adaa 100644
--- a/lib/bindings/flutter/rendering/sliver_fill.g.dart
+++ b/lib/bindings/flutter/rendering/sliver_fill.g.dart
@@ -10,11 +10,14 @@ class RenderSliverFillViewportAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverFillViewport':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverFillViewport(
-            childManager: namedArgs['childManager'],
-            viewportFraction: namedArgs.containsKey('viewportFraction') ? namedArgs['viewportFraction'] : 1.0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSliverFillViewport(
+                childManager: namedArgs['childManager'],
+                viewportFraction: namedArgs.containsKey('viewportFraction')
+                    ? namedArgs['viewportFraction']
+                    : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,8 +33,8 @@ class RenderSliverFillViewportAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -40,7 +43,7 @@ extension RenderSliverFillViewportBinding on RenderSliverFillViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverFillViewport');
+        return const HTType('RenderSliverFillViewport');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -100,157 +103,237 @@ extension RenderSliverFillViewportBinding on RenderSliverFillViewport {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            adoptChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'indexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => indexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            indexOf(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugAssertChildListIsNonEmptyAndContiguous':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertChildListIsNonEmptyAndContiguous();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertChildListIsNonEmptyAndContiguous();
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -266,22 +349,26 @@ extension RenderSliverFillViewportBinding on RenderSliverFillViewport {
         viewportFraction = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
-class RenderSliverFillRemainingWithScrollableAutoBinding extends HTExternalClass {
-  RenderSliverFillRemainingWithScrollableAutoBinding() : super('RenderSliverFillRemainingWithScrollable');
+class RenderSliverFillRemainingWithScrollableAutoBinding
+    extends HTExternalClass {
+  RenderSliverFillRemainingWithScrollableAutoBinding()
+      : super('RenderSliverFillRemainingWithScrollable');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverFillRemainingWithScrollable':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderSliverFillRemainingWithScrollable(child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+            RenderSliverFillRemainingWithScrollable(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -297,17 +384,18 @@ class RenderSliverFillRemainingWithScrollableAutoBinding extends HTExternalClass
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
 
-extension RenderSliverFillRemainingWithScrollableBinding on RenderSliverFillRemainingWithScrollable {
+extension RenderSliverFillRemainingWithScrollableBinding
+    on RenderSliverFillRemainingWithScrollable {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverFillRemainingWithScrollable');
+        return const HTType('RenderSliverFillRemainingWithScrollable');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -357,135 +445,206 @@ extension RenderSliverFillRemainingWithScrollableBinding on RenderSliverFillRema
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -498,7 +657,7 @@ extension RenderSliverFillRemainingWithScrollableBinding on RenderSliverFillRema
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -511,9 +670,11 @@ class RenderSliverFillRemainingAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderSliverFillRemaining':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderSliverFillRemaining(child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+            RenderSliverFillRemaining(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -529,8 +690,8 @@ class RenderSliverFillRemainingAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -539,7 +700,7 @@ extension RenderSliverFillRemainingBinding on RenderSliverFillRemaining {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverFillRemaining');
+        return const HTType('RenderSliverFillRemaining');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -589,135 +750,206 @@ extension RenderSliverFillRemainingBinding on RenderSliverFillRemaining {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -730,22 +962,26 @@ extension RenderSliverFillRemainingBinding on RenderSliverFillRemaining {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
-class RenderSliverFillRemainingAndOverscrollAutoBinding extends HTExternalClass {
-  RenderSliverFillRemainingAndOverscrollAutoBinding() : super('RenderSliverFillRemainingAndOverscroll');
+class RenderSliverFillRemainingAndOverscrollAutoBinding
+    extends HTExternalClass {
+  RenderSliverFillRemainingAndOverscrollAutoBinding()
+      : super('RenderSliverFillRemainingAndOverscroll');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverFillRemainingAndOverscroll':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderSliverFillRemainingAndOverscroll(child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+            RenderSliverFillRemainingAndOverscroll(
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -761,17 +997,18 @@ class RenderSliverFillRemainingAndOverscrollAutoBinding extends HTExternalClass
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
 
-extension RenderSliverFillRemainingAndOverscrollBinding on RenderSliverFillRemainingAndOverscroll {
+extension RenderSliverFillRemainingAndOverscrollBinding
+    on RenderSliverFillRemainingAndOverscroll {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverFillRemainingAndOverscroll');
+        return const HTType('RenderSliverFillRemainingAndOverscroll');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -821,135 +1058,206 @@ extension RenderSliverFillRemainingAndOverscrollBinding on RenderSliverFillRemai
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -962,7 +1270,7 @@ extension RenderSliverFillRemainingAndOverscrollBinding on RenderSliverFillRemai
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver_fixed_extent_list.g.dart b/lib/bindings/flutter/rendering/sliver_fixed_extent_list.g.dart
index ab92a59..a41b0f7 100644
--- a/lib/bindings/flutter/rendering/sliver_fixed_extent_list.g.dart
+++ b/lib/bindings/flutter/rendering/sliver_fixed_extent_list.g.dart
@@ -4,16 +4,19 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/animation.dart';
 
 class RenderSliverFixedExtentListAutoBinding extends HTExternalClass {
-  RenderSliverFixedExtentListAutoBinding() : super('RenderSliverFixedExtentList');
+  RenderSliverFixedExtentListAutoBinding()
+      : super('RenderSliverFixedExtentList');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverFixedExtentList':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderSliverFixedExtentList(childManager: namedArgs['childManager'], itemExtent: namedArgs['itemExtent']);
+            RenderSliverFixedExtentList(
+                childManager: namedArgs['childManager'],
+                itemExtent: namedArgs['itemExtent']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,8 +32,8 @@ class RenderSliverFixedExtentListAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -39,7 +42,7 @@ extension RenderSliverFixedExtentListBinding on RenderSliverFixedExtentList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverFixedExtentList');
+        return const HTType('RenderSliverFixedExtentList');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -97,157 +100,237 @@ extension RenderSliverFixedExtentListBinding on RenderSliverFixedExtentList {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            adoptChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'indexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => indexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            indexOf(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugAssertChildListIsNonEmptyAndContiguous':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertChildListIsNonEmptyAndContiguous();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertChildListIsNonEmptyAndContiguous();
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -263,7 +346,7 @@ extension RenderSliverFixedExtentListBinding on RenderSliverFixedExtentList {
         itemExtent = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver_grid.g.dart b/lib/bindings/flutter/rendering/sliver_grid.g.dart
index 3eed159..0e015d2 100644
--- a/lib/bindings/flutter/rendering/sliver_grid.g.dart
+++ b/lib/bindings/flutter/rendering/sliver_grid.g.dart
@@ -16,7 +16,7 @@ class SliverGridGeometryAutoBinding extends HTExternalClass {
             mainAxisExtent: namedArgs['mainAxisExtent'],
             crossAxisExtent: namedArgs['crossAxisExtent']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +30,7 @@ extension SliverGridGeometryBinding on SliverGridGeometry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverGridGeometry');
+        return const HTType('SliverGridGeometry');
       case 'scrollOffset':
         return scrollOffset;
       case 'crossAxisOffset':
@@ -42,31 +42,34 @@ extension SliverGridGeometryBinding on SliverGridGeometry {
       case 'trailingScrollOffset':
         return trailingScrollOffset;
       case 'getBoxConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => getBoxConstraints(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getBoxConstraints(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class SliverGridRegularTileLayoutAutoBinding extends HTExternalClass {
-  SliverGridRegularTileLayoutAutoBinding() : super('SliverGridRegularTileLayout');
+  SliverGridRegularTileLayoutAutoBinding()
+      : super('SliverGridRegularTileLayout');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverGridRegularTileLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverGridRegularTileLayout(
-            crossAxisCount: namedArgs['crossAxisCount'],
-            mainAxisStride: namedArgs['mainAxisStride'],
-            crossAxisStride: namedArgs['crossAxisStride'],
-            childMainAxisExtent: namedArgs['childMainAxisExtent'],
-            childCrossAxisExtent: namedArgs['childCrossAxisExtent'],
-            reverseCrossAxis: namedArgs['reverseCrossAxis']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverGridRegularTileLayout(
+                crossAxisCount: namedArgs['crossAxisCount'],
+                mainAxisStride: namedArgs['mainAxisStride'],
+                crossAxisStride: namedArgs['crossAxisStride'],
+                childMainAxisExtent: namedArgs['childMainAxisExtent'],
+                childCrossAxisExtent: namedArgs['childCrossAxisExtent'],
+                reverseCrossAxis: namedArgs['reverseCrossAxis']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,7 +83,7 @@ extension SliverGridRegularTileLayoutBinding on SliverGridRegularTileLayout {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverGridRegularTileLayout');
+        return const HTType('SliverGridRegularTileLayout');
       case 'crossAxisCount':
         return crossAxisCount;
       case 'mainAxisStride':
@@ -94,34 +97,49 @@ extension SliverGridRegularTileLayoutBinding on SliverGridRegularTileLayout {
       case 'reverseCrossAxis':
         return reverseCrossAxis;
       case 'getMinChildIndexForScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinChildIndexForScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinChildIndexForScrollOffset(positionalArgs[0]);
       case 'getMaxChildIndexForScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxChildIndexForScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxChildIndexForScrollOffset(positionalArgs[0]);
       case 'getGeometryForChildIndex':
-        return ({positionalArgs, namedArgs, typeArgs}) => getGeometryForChildIndex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getGeometryForChildIndex(positionalArgs[0]);
       case 'computeMaxScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxScrollOffset(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
-class SliverGridDelegateWithFixedCrossAxisCountAutoBinding extends HTExternalClass {
-  SliverGridDelegateWithFixedCrossAxisCountAutoBinding() : super('SliverGridDelegateWithFixedCrossAxisCount');
+class SliverGridDelegateWithFixedCrossAxisCountAutoBinding
+    extends HTExternalClass {
+  SliverGridDelegateWithFixedCrossAxisCountAutoBinding()
+      : super('SliverGridDelegateWithFixedCrossAxisCount');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverGridDelegateWithFixedCrossAxisCount':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverGridDelegateWithFixedCrossAxisCount(
-            crossAxisCount: namedArgs['crossAxisCount'],
-            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing') ? namedArgs['mainAxisSpacing'] : 0.0,
-            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing') ? namedArgs['crossAxisSpacing'] : 0.0,
-            childAspectRatio: namedArgs.containsKey('childAspectRatio') ? namedArgs['childAspectRatio'] : 1.0,
-            mainAxisExtent: namedArgs.containsKey('mainAxisExtent') ? namedArgs['mainAxisExtent'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverGridDelegateWithFixedCrossAxisCount(
+                crossAxisCount: namedArgs['crossAxisCount'],
+                mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing')
+                    ? namedArgs['mainAxisSpacing']
+                    : 0.0,
+                crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing')
+                    ? namedArgs['crossAxisSpacing']
+                    : 0.0,
+                childAspectRatio: namedArgs.containsKey('childAspectRatio')
+                    ? namedArgs['childAspectRatio']
+                    : 1.0,
+                mainAxisExtent: namedArgs.containsKey('mainAxisExtent')
+                    ? namedArgs['mainAxisExtent']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -131,11 +149,12 @@ class SliverGridDelegateWithFixedCrossAxisCountAutoBinding extends HTExternalCla
   }
 }
 
-extension SliverGridDelegateWithFixedCrossAxisCountBinding on SliverGridDelegateWithFixedCrossAxisCount {
+extension SliverGridDelegateWithFixedCrossAxisCountBinding
+    on SliverGridDelegateWithFixedCrossAxisCount {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverGridDelegateWithFixedCrossAxisCount');
+        return const HTType('SliverGridDelegateWithFixedCrossAxisCount');
       case 'crossAxisCount':
         return crossAxisCount;
       case 'mainAxisSpacing':
@@ -147,30 +166,43 @@ extension SliverGridDelegateWithFixedCrossAxisCountBinding on SliverGridDelegate
       case 'mainAxisExtent':
         return mainAxisExtent;
       case 'getLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getLayout(positionalArgs[0]);
       case 'shouldRelayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRelayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRelayout(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
-class SliverGridDelegateWithMaxCrossAxisExtentAutoBinding extends HTExternalClass {
-  SliverGridDelegateWithMaxCrossAxisExtentAutoBinding() : super('SliverGridDelegateWithMaxCrossAxisExtent');
+class SliverGridDelegateWithMaxCrossAxisExtentAutoBinding
+    extends HTExternalClass {
+  SliverGridDelegateWithMaxCrossAxisExtentAutoBinding()
+      : super('SliverGridDelegateWithMaxCrossAxisExtent');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverGridDelegateWithMaxCrossAxisExtent':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverGridDelegateWithMaxCrossAxisExtent(
-            maxCrossAxisExtent: namedArgs['maxCrossAxisExtent'],
-            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing') ? namedArgs['mainAxisSpacing'] : 0.0,
-            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing') ? namedArgs['crossAxisSpacing'] : 0.0,
-            childAspectRatio: namedArgs.containsKey('childAspectRatio') ? namedArgs['childAspectRatio'] : 1.0,
-            mainAxisExtent: namedArgs.containsKey('mainAxisExtent') ? namedArgs['mainAxisExtent'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverGridDelegateWithMaxCrossAxisExtent(
+                maxCrossAxisExtent: namedArgs['maxCrossAxisExtent'],
+                mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing')
+                    ? namedArgs['mainAxisSpacing']
+                    : 0.0,
+                crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing')
+                    ? namedArgs['crossAxisSpacing']
+                    : 0.0,
+                childAspectRatio: namedArgs.containsKey('childAspectRatio')
+                    ? namedArgs['childAspectRatio']
+                    : 1.0,
+                mainAxisExtent: namedArgs.containsKey('mainAxisExtent')
+                    ? namedArgs['mainAxisExtent']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -180,11 +212,12 @@ class SliverGridDelegateWithMaxCrossAxisExtentAutoBinding extends HTExternalClas
   }
 }
 
-extension SliverGridDelegateWithMaxCrossAxisExtentBinding on SliverGridDelegateWithMaxCrossAxisExtent {
+extension SliverGridDelegateWithMaxCrossAxisExtentBinding
+    on SliverGridDelegateWithMaxCrossAxisExtent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverGridDelegateWithMaxCrossAxisExtent');
+        return const HTType('SliverGridDelegateWithMaxCrossAxisExtent');
       case 'maxCrossAxisExtent':
         return maxCrossAxisExtent;
       case 'mainAxisSpacing':
@@ -196,11 +229,13 @@ extension SliverGridDelegateWithMaxCrossAxisExtentBinding on SliverGridDelegateW
       case 'mainAxisExtent':
         return mainAxisExtent;
       case 'getLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getLayout(positionalArgs[0]);
       case 'shouldRelayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRelayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRelayout(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -212,9 +247,10 @@ class SliverGridParentDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverGridParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverGridParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverGridParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -233,7 +269,7 @@ extension SliverGridParentDataBinding on SliverGridParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverGridParentData');
+        return const HTType('SliverGridParentData');
       case 'crossAxisOffset':
         return crossAxisOffset;
       case 'index':
@@ -247,7 +283,7 @@ extension SliverGridParentDataBinding on SliverGridParentData {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -263,7 +299,7 @@ extension SliverGridParentDataBinding on SliverGridParentData {
         layoutOffset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -275,10 +311,11 @@ class RenderSliverGridAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverGrid':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderSliverGrid(childManager: namedArgs['childManager'], gridDelegate: namedArgs['gridDelegate']);
+        return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverGrid(
+            childManager: namedArgs['childManager'],
+            gridDelegate: namedArgs['gridDelegate']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -294,8 +331,8 @@ class RenderSliverGridAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -304,7 +341,7 @@ extension RenderSliverGridBinding on RenderSliverGrid {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverGrid');
+        return const HTType('RenderSliverGrid');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -360,161 +397,242 @@ extension RenderSliverGridBinding on RenderSliverGrid {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'childCrossAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childCrossAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childCrossAxisPosition(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            adoptChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'indexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => indexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            indexOf(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugAssertChildListIsNonEmptyAndContiguous':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertChildListIsNonEmptyAndContiguous();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertChildListIsNonEmptyAndContiguous();
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -530,7 +648,7 @@ extension RenderSliverGridBinding on RenderSliverGrid {
         gridDelegate = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver_list.g.dart b/lib/bindings/flutter/rendering/sliver_list.g.dart
index bf7858b..167cae9 100644
--- a/lib/bindings/flutter/rendering/sliver_list.g.dart
+++ b/lib/bindings/flutter/rendering/sliver_list.g.dart
@@ -10,9 +10,10 @@ class RenderSliverListAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverList':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverList(childManager: namedArgs['childManager']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSliverList(childManager: namedArgs['childManager']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,8 +29,8 @@ class RenderSliverListAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -38,7 +39,7 @@ extension RenderSliverListBinding on RenderSliverList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverList');
+        return const HTType('RenderSliverList');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -94,157 +95,237 @@ extension RenderSliverListBinding on RenderSliverList {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            adoptChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'indexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => indexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            indexOf(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugAssertChildListIsNonEmptyAndContiguous':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertChildListIsNonEmptyAndContiguous();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertChildListIsNonEmptyAndContiguous();
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -257,7 +338,7 @@ extension RenderSliverListBinding on RenderSliverList {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver_multi_box_adaptor.g.dart b/lib/bindings/flutter/rendering/sliver_multi_box_adaptor.g.dart
index e79b9cc..c9f73c5 100644
--- a/lib/bindings/flutter/rendering/sliver_multi_box_adaptor.g.dart
+++ b/lib/bindings/flutter/rendering/sliver_multi_box_adaptor.g.dart
@@ -2,15 +2,17 @@ import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/rendering.dart';
 
 class SliverMultiBoxAdaptorParentDataAutoBinding extends HTExternalClass {
-  SliverMultiBoxAdaptorParentDataAutoBinding() : super('SliverMultiBoxAdaptorParentData');
+  SliverMultiBoxAdaptorParentDataAutoBinding()
+      : super('SliverMultiBoxAdaptorParentData');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverMultiBoxAdaptorParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverMultiBoxAdaptorParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverMultiBoxAdaptorParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,11 +27,12 @@ class SliverMultiBoxAdaptorParentDataAutoBinding extends HTExternalClass {
   }
 }
 
-extension SliverMultiBoxAdaptorParentDataBinding on SliverMultiBoxAdaptorParentData {
+extension SliverMultiBoxAdaptorParentDataBinding
+    on SliverMultiBoxAdaptorParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverMultiBoxAdaptorParentData');
+        return const HTType('SliverMultiBoxAdaptorParentData');
       case 'index':
         return index;
       case 'layoutOffset':
@@ -41,7 +44,7 @@ extension SliverMultiBoxAdaptorParentDataBinding on SliverMultiBoxAdaptorParentD
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -54,7 +57,7 @@ extension SliverMultiBoxAdaptorParentDataBinding on SliverMultiBoxAdaptorParentD
         layoutOffset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver_padding.g.dart b/lib/bindings/flutter/rendering/sliver_padding.g.dart
index 5b5da1c..415041e 100644
--- a/lib/bindings/flutter/rendering/sliver_padding.g.dart
+++ b/lib/bindings/flutter/rendering/sliver_padding.g.dart
@@ -12,10 +12,12 @@ class RenderSliverPaddingAutoBinding extends HTExternalClass {
       case 'RenderSliverPadding':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverPadding(
             padding: namedArgs['padding'],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,8 +33,8 @@ class RenderSliverPaddingAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -41,7 +43,7 @@ extension RenderSliverPaddingBinding on RenderSliverPadding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverPadding');
+        return const HTType('RenderSliverPadding');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -105,137 +107,209 @@ extension RenderSliverPaddingBinding on RenderSliverPadding {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'childMainAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childMainAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childMainAxisPosition(positionalArgs[0]);
       case 'childCrossAxisPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => childCrossAxisPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childCrossAxisPosition(positionalArgs[0]);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -254,7 +328,7 @@ extension RenderSliverPaddingBinding on RenderSliverPadding {
         textDirection = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/sliver_persistent_header.g.dart b/lib/bindings/flutter/rendering/sliver_persistent_header.g.dart
index 402ff8f..d1a8887 100644
--- a/lib/bindings/flutter/rendering/sliver_persistent_header.g.dart
+++ b/lib/bindings/flutter/rendering/sliver_persistent_header.g.dart
@@ -3,18 +3,24 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/animation.dart';
 
 class OverScrollHeaderStretchConfigurationAutoBinding extends HTExternalClass {
-  OverScrollHeaderStretchConfigurationAutoBinding() : super('OverScrollHeaderStretchConfiguration');
+  OverScrollHeaderStretchConfigurationAutoBinding()
+      : super('OverScrollHeaderStretchConfiguration');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'OverScrollHeaderStretchConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => OverScrollHeaderStretchConfiguration(
-            stretchTriggerOffset:
-                namedArgs.containsKey('stretchTriggerOffset') ? namedArgs['stretchTriggerOffset'] : 100.0,
-            onStretchTrigger: namedArgs.containsKey('onStretchTrigger') ? namedArgs['onStretchTrigger'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OverScrollHeaderStretchConfiguration(
+                stretchTriggerOffset:
+                    namedArgs.containsKey('stretchTriggerOffset')
+                        ? namedArgs['stretchTriggerOffset']
+                        : 100.0,
+                onStretchTrigger: namedArgs.containsKey('onStretchTrigger')
+                    ? namedArgs['onStretchTrigger']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,42 +31,49 @@ class OverScrollHeaderStretchConfigurationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'AsyncCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
+      'AsyncCallback': (HTFunction function) => () => function
+          .call(positionalArgs: const [], namedArgs: const {}) as Future<void>,
     };
   }
 }
 
-extension OverScrollHeaderStretchConfigurationBinding on OverScrollHeaderStretchConfiguration {
+extension OverScrollHeaderStretchConfigurationBinding
+    on OverScrollHeaderStretchConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverScrollHeaderStretchConfiguration');
+        return const HTType('OverScrollHeaderStretchConfiguration');
       case 'stretchTriggerOffset':
         return stretchTriggerOffset;
       case 'onStretchTrigger':
         return onStretchTrigger;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
-class PersistentHeaderShowOnScreenConfigurationAutoBinding extends HTExternalClass {
-  PersistentHeaderShowOnScreenConfigurationAutoBinding() : super('PersistentHeaderShowOnScreenConfiguration');
+class PersistentHeaderShowOnScreenConfigurationAutoBinding
+    extends HTExternalClass {
+  PersistentHeaderShowOnScreenConfigurationAutoBinding()
+      : super('PersistentHeaderShowOnScreenConfiguration');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PersistentHeaderShowOnScreenConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => PersistentHeaderShowOnScreenConfiguration(
-            minShowOnScreenExtent: namedArgs.containsKey('minShowOnScreenExtent')
-                ? namedArgs['minShowOnScreenExtent']
-                : double.negativeInfinity,
-            maxShowOnScreenExtent:
-                namedArgs.containsKey('maxShowOnScreenExtent') ? namedArgs['maxShowOnScreenExtent'] : double.infinity);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PersistentHeaderShowOnScreenConfiguration(
+                minShowOnScreenExtent:
+                    namedArgs.containsKey('minShowOnScreenExtent')
+                        ? namedArgs['minShowOnScreenExtent']
+                        : double.negativeInfinity,
+                maxShowOnScreenExtent:
+                    namedArgs.containsKey('maxShowOnScreenExtent')
+                        ? namedArgs['maxShowOnScreenExtent']
+                        : double.infinity);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -70,33 +83,40 @@ class PersistentHeaderShowOnScreenConfigurationAutoBinding extends HTExternalCla
   }
 }
 
-extension PersistentHeaderShowOnScreenConfigurationBinding on PersistentHeaderShowOnScreenConfiguration {
+extension PersistentHeaderShowOnScreenConfigurationBinding
+    on PersistentHeaderShowOnScreenConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PersistentHeaderShowOnScreenConfiguration');
+        return const HTType('PersistentHeaderShowOnScreenConfiguration');
       case 'minShowOnScreenExtent':
         return minShowOnScreenExtent;
       case 'maxShowOnScreenExtent':
         return maxShowOnScreenExtent;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class FloatingHeaderSnapConfigurationAutoBinding extends HTExternalClass {
-  FloatingHeaderSnapConfigurationAutoBinding() : super('FloatingHeaderSnapConfiguration');
+  FloatingHeaderSnapConfigurationAutoBinding()
+      : super('FloatingHeaderSnapConfiguration');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FloatingHeaderSnapConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => FloatingHeaderSnapConfiguration(
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : const Duration(milliseconds: 300));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FloatingHeaderSnapConfiguration(
+                curve: namedArgs.containsKey('curve')
+                    ? namedArgs['curve']
+                    : Curves.ease,
+                duration: namedArgs.containsKey('duration')
+                    ? namedArgs['duration']
+                    : const Duration(milliseconds: 300));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -106,17 +126,18 @@ class FloatingHeaderSnapConfigurationAutoBinding extends HTExternalClass {
   }
 }
 
-extension FloatingHeaderSnapConfigurationBinding on FloatingHeaderSnapConfiguration {
+extension FloatingHeaderSnapConfigurationBinding
+    on FloatingHeaderSnapConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FloatingHeaderSnapConfiguration');
+        return const HTType('FloatingHeaderSnapConfiguration');
       case 'curve':
         return curve;
       case 'duration':
         return duration;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/stack.g.dart b/lib/bindings/flutter/rendering/stack.g.dart
index 78617b5..c258415 100644
--- a/lib/bindings/flutter/rendering/stack.g.dart
+++ b/lib/bindings/flutter/rendering/stack.g.dart
@@ -19,7 +19,7 @@ class StackFitAutoBinding extends HTExternalClass {
       case 'StackFit.passthrough':
         return StackFit.passthrough;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +27,14 @@ class StackFitAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StackFit');
+        return const HTType('StackFit');
       case 'index':
         return (instance as StackFit).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as StackFit).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as StackFit).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,19 +46,24 @@ class RelativeRectAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RelativeRect.fromLTRB':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RelativeRect.fromLTRB(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) => RelativeRect.fromLTRB(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs[2],
+            positionalArgs[3]);
       case 'RelativeRect.fromSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => RelativeRect.fromSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RelativeRect.fromSize(positionalArgs[0], positionalArgs[1]);
       case 'RelativeRect.fromRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => RelativeRect.fromRect(positionalArgs[0], positionalArgs[1]);
-      case 'RelativeRect.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RelativeRect.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            RelativeRect.fromRect(positionalArgs[0], positionalArgs[1]);
+      case 'RelativeRect.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => RelativeRect.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'RelativeRect.fill':
         return RelativeRect.fill;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,7 +77,7 @@ extension RelativeRectBinding on RelativeRect {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RelativeRect');
+        return const HTType('RelativeRect');
       case 'left':
         return left;
       case 'top':
@@ -85,21 +91,27 @@ extension RelativeRectBinding on RelativeRect {
       case 'hashCode':
         return hashCode;
       case 'shift':
-        return ({positionalArgs, namedArgs, typeArgs}) => shift(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shift(positionalArgs[0]);
       case 'inflate':
-        return ({positionalArgs, namedArgs, typeArgs}) => inflate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inflate(positionalArgs[0]);
       case 'deflate':
-        return ({positionalArgs, namedArgs, typeArgs}) => deflate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deflate(positionalArgs[0]);
       case 'intersect':
-        return ({positionalArgs, namedArgs, typeArgs}) => intersect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            intersect(positionalArgs[0]);
       case 'toRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => toRect(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toRect(positionalArgs[0]);
       case 'toSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => toSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toSize(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -113,7 +125,7 @@ class StackParentDataAutoBinding extends HTExternalClass {
       case 'StackParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => StackParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -132,7 +144,7 @@ extension StackParentDataBinding on StackParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StackParentData');
+        return const HTType('StackParentData');
       case 'top':
         return top;
       case 'right':
@@ -156,7 +168,7 @@ extension StackParentDataBinding on StackParentData {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -187,7 +199,7 @@ extension StackParentDataBinding on StackParentData {
         rect = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -200,19 +212,31 @@ class RenderStackAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderStack':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderStack(
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : AlignmentDirectional.topStart,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : StackFit.loose,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            children: namedArgs.containsKey('children')
+                ? List<RenderBox>.from(namedArgs['children'])
+                : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : AlignmentDirectional.topStart,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            fit: namedArgs.containsKey('fit')
+                ? namedArgs['fit']
+                : StackFit.loose,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'RenderStack.getIntrinsicDimension':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RenderStack.getIntrinsicDimension(positionalArgs[0], positionalArgs[1]);
+            RenderStack.getIntrinsicDimension(
+                positionalArgs[0], positionalArgs[1]);
       case 'RenderStack.layoutPositionedChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderStack.layoutPositionedChild(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderStack.layoutPositionedChild(positionalArgs[0],
+                positionalArgs[1], positionalArgs[2], positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -228,8 +252,8 @@ class RenderStackAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -238,7 +262,7 @@ extension RenderStackBinding on RenderStack {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderStack');
+        return const HTType('RenderStack');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -298,60 +322,84 @@ extension RenderStackBinding on RenderStack {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -359,132 +407,208 @@ extension RenderStackBinding on RenderStack {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -509,7 +633,7 @@ extension RenderStackBinding on RenderStack {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -522,12 +646,18 @@ class RenderIndexedStackAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderIndexedStack':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderIndexedStack(
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : AlignmentDirectional.topStart,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            children: namedArgs.containsKey('children')
+                ? List<RenderBox>.from(namedArgs['children'])
+                : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : AlignmentDirectional.topStart,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             index: namedArgs.containsKey('index') ? namedArgs['index'] : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -543,8 +673,8 @@ class RenderIndexedStackAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -553,7 +683,7 @@ extension RenderIndexedStackBinding on RenderIndexedStack {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderIndexedStack');
+        return const HTType('RenderIndexedStack');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -615,64 +745,90 @@ extension RenderIndexedStackBinding on RenderIndexedStack {
       case 'parent':
         return parent;
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paintStack':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintStack(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintStack(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -680,130 +836,205 @@ extension RenderIndexedStackBinding on RenderIndexedStack {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -819,7 +1050,7 @@ extension RenderIndexedStackBinding on RenderIndexedStack {
         index = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/table.g.dart b/lib/bindings/flutter/rendering/table.g.dart
index cc018ec..001ad58 100644
--- a/lib/bindings/flutter/rendering/table.g.dart
+++ b/lib/bindings/flutter/rendering/table.g.dart
@@ -22,7 +22,7 @@ class TableCellVerticalAlignmentAutoBinding extends HTExternalClass {
       case 'TableCellVerticalAlignment.fill':
         return TableCellVerticalAlignment.fill;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,13 +30,14 @@ class TableCellVerticalAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TableCellVerticalAlignment');
+        return const HTType('TableCellVerticalAlignment');
       case 'index':
         return (instance as TableCellVerticalAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TableCellVerticalAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TableCellVerticalAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,7 +51,7 @@ class TableCellParentDataAutoBinding extends HTExternalClass {
       case 'TableCellParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => TableCellParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -69,7 +70,7 @@ extension TableCellParentDataBinding on TableCellParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TableCellParentData');
+        return const HTType('TableCellParentData');
       case 'verticalAlignment':
         return verticalAlignment;
       case 'x':
@@ -81,7 +82,7 @@ extension TableCellParentDataBinding on TableCellParentData {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -100,7 +101,7 @@ extension TableCellParentDataBinding on TableCellParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -112,10 +113,10 @@ class IntrinsicColumnWidthAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IntrinsicColumnWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            IntrinsicColumnWidth(flex: namedArgs.containsKey('flex') ? namedArgs['flex'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => IntrinsicColumnWidth(
+            flex: namedArgs.containsKey('flex') ? namedArgs['flex'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -129,17 +130,20 @@ extension IntrinsicColumnWidthBinding on IntrinsicColumnWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IntrinsicColumnWidth');
+        return const HTType('IntrinsicColumnWidth');
       case 'minIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'maxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'flex':
-        return ({positionalArgs, namedArgs, typeArgs}) => flex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            flex(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -151,9 +155,10 @@ class FixedColumnWidthAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FixedColumnWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => FixedColumnWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FixedColumnWidth(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -167,19 +172,22 @@ extension FixedColumnWidthBinding on FixedColumnWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FixedColumnWidth');
+        return const HTType('FixedColumnWidth');
       case 'value':
         return value;
       case 'minIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'maxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'flex':
-        return ({positionalArgs, namedArgs, typeArgs}) => flex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            flex(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -191,9 +199,10 @@ class FractionColumnWidthAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FractionColumnWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => FractionColumnWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FractionColumnWidth(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -207,19 +216,22 @@ extension FractionColumnWidthBinding on FractionColumnWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FractionColumnWidth');
+        return const HTType('FractionColumnWidth');
       case 'value':
         return value;
       case 'minIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'maxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'flex':
-        return ({positionalArgs, namedArgs, typeArgs}) => flex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            flex(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -231,10 +243,10 @@ class FlexColumnWidthAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FlexColumnWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            FlexColumnWidth(positionalArgs.length > 0 ? positionalArgs[0] : 1.0);
+        return ({positionalArgs, namedArgs, typeArgs}) => FlexColumnWidth(
+            positionalArgs.length > 0 ? positionalArgs[0] : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -248,19 +260,22 @@ extension FlexColumnWidthBinding on FlexColumnWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FlexColumnWidth');
+        return const HTType('FlexColumnWidth');
       case 'value':
         return value;
       case 'minIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'maxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'flex':
-        return ({positionalArgs, namedArgs, typeArgs}) => flex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            flex(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -272,9 +287,10 @@ class MaxColumnWidthAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MaxColumnWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => MaxColumnWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MaxColumnWidth(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -288,21 +304,24 @@ extension MaxColumnWidthBinding on MaxColumnWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaxColumnWidth');
+        return const HTType('MaxColumnWidth');
       case 'a':
         return a;
       case 'b':
         return b;
       case 'minIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'maxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'flex':
-        return ({positionalArgs, namedArgs, typeArgs}) => flex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            flex(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -314,9 +333,10 @@ class MinColumnWidthAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MinColumnWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => MinColumnWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MinColumnWidth(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -330,21 +350,24 @@ extension MinColumnWidthBinding on MinColumnWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MinColumnWidth');
+        return const HTType('MinColumnWidth');
       case 'a':
         return a;
       case 'b':
         return b;
       case 'minIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            minIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'maxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxIntrinsicWidth(positionalArgs[0], positionalArgs[1]);
       case 'flex':
-        return ({positionalArgs, namedArgs, typeArgs}) => flex(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            flex(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -357,25 +380,36 @@ class RenderTableAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderTable':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderTable(
-            columns: namedArgs.containsKey('columns') ? namedArgs['columns'] : null,
+            columns:
+                namedArgs.containsKey('columns') ? namedArgs['columns'] : null,
             rows: namedArgs.containsKey('rows') ? namedArgs['rows'] : null,
-            columnWidths: namedArgs.containsKey('columnWidths') ? namedArgs['columnWidths'] : null,
+            columnWidths: namedArgs.containsKey('columnWidths')
+                ? namedArgs['columnWidths']
+                : null,
             defaultColumnWidth: namedArgs.containsKey('defaultColumnWidth')
                 ? namedArgs['defaultColumnWidth']
                 : const FlexColumnWidth(1.0),
             textDirection: namedArgs['textDirection'],
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : null,
-            rowDecorations:
-                namedArgs.containsKey('rowDecorations') ? List<Decoration?>.from(namedArgs['rowDecorations']) : null,
-            configuration:
-                namedArgs.containsKey('configuration') ? namedArgs['configuration'] : ImageConfiguration.empty,
-            defaultVerticalAlignment: namedArgs.containsKey('defaultVerticalAlignment')
-                ? namedArgs['defaultVerticalAlignment']
-                : TableCellVerticalAlignment.top,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
-            children: namedArgs.containsKey('children') ? List<List<RenderBox>>.from(namedArgs['children']) : null);
+            border:
+                namedArgs.containsKey('border') ? namedArgs['border'] : null,
+            rowDecorations: namedArgs.containsKey('rowDecorations')
+                ? List<Decoration?>.from(namedArgs['rowDecorations'])
+                : null,
+            configuration: namedArgs.containsKey('configuration')
+                ? namedArgs['configuration']
+                : ImageConfiguration.empty,
+            defaultVerticalAlignment:
+                namedArgs.containsKey('defaultVerticalAlignment')
+                    ? namedArgs['defaultVerticalAlignment']
+                    : TableCellVerticalAlignment.top,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null,
+            children: namedArgs.containsKey('children')
+                ? List<List<RenderBox>>.from(namedArgs['children'])
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -391,8 +425,8 @@ class RenderTableAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -401,7 +435,7 @@ extension RenderTableBinding on RenderTable {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderTable');
+        return const HTType('RenderTable');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -467,170 +501,264 @@ extension RenderTableBinding on RenderTable {
       case 'parent':
         return parent;
       case 'setColumnWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => setColumnWidth(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setColumnWidth(positionalArgs[0], positionalArgs[1]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
-      case 'setFlatChildren':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            setFlatChildren(positionalArgs[0], List<RenderBox?>.from(positionalArgs[1]));
+            setupParentData(positionalArgs[0]);
+      case 'setFlatChildren':
+        return ({positionalArgs, namedArgs, typeArgs}) => setFlatChildren(
+            positionalArgs[0], List<RenderBox?>.from(positionalArgs[1]));
       case 'setChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => setChildren(List<List<RenderBox>>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setChildren(List<List<RenderBox>>.from(positionalArgs[0]));
       case 'addRow':
-        return ({positionalArgs, namedArgs, typeArgs}) => addRow(List<RenderBox?>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addRow(List<RenderBox?>.from(positionalArgs[0]));
       case 'setChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             setChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'column':
-        return ({positionalArgs, namedArgs, typeArgs}) => column(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            column(positionalArgs[0]);
       case 'row':
-        return ({positionalArgs, namedArgs, typeArgs}) => row(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            row(positionalArgs[0]);
       case 'getRowBox':
-        return ({positionalArgs, namedArgs, typeArgs}) => getRowBox(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getRowBox(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -638,7 +766,7 @@ extension RenderTableBinding on RenderTable {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -681,7 +809,7 @@ extension RenderTableBinding on RenderTable {
         textBaseline = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/table_border.g.dart b/lib/bindings/flutter/rendering/table_border.g.dart
index fcba323..18a5379 100644
--- a/lib/bindings/flutter/rendering/table_border.g.dart
+++ b/lib/bindings/flutter/rendering/table_border.g.dart
@@ -10,27 +10,46 @@ class TableBorderAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TableBorder':
         return ({positionalArgs, namedArgs, typeArgs}) => TableBorder(
-            top: namedArgs.containsKey('top') ? namedArgs['top'] : BorderSide.none,
-            right: namedArgs.containsKey('right') ? namedArgs['right'] : BorderSide.none,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : BorderSide.none,
-            left: namedArgs.containsKey('left') ? namedArgs['left'] : BorderSide.none,
-            horizontalInside:
-                namedArgs.containsKey('horizontalInside') ? namedArgs['horizontalInside'] : BorderSide.none,
-            verticalInside: namedArgs.containsKey('verticalInside') ? namedArgs['verticalInside'] : BorderSide.none);
+            top: namedArgs.containsKey('top')
+                ? namedArgs['top']
+                : BorderSide.none,
+            right: namedArgs.containsKey('right')
+                ? namedArgs['right']
+                : BorderSide.none,
+            bottom: namedArgs.containsKey('bottom')
+                ? namedArgs['bottom']
+                : BorderSide.none,
+            left: namedArgs.containsKey('left')
+                ? namedArgs['left']
+                : BorderSide.none,
+            horizontalInside: namedArgs.containsKey('horizontalInside')
+                ? namedArgs['horizontalInside']
+                : BorderSide.none,
+            verticalInside: namedArgs.containsKey('verticalInside')
+                ? namedArgs['verticalInside']
+                : BorderSide.none);
       case 'TableBorder.all':
         return ({positionalArgs, namedArgs, typeArgs}) => TableBorder.all(
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : const Color(0xFF000000),
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : const Color(0xFF000000),
             width: namedArgs.containsKey('width') ? namedArgs['width'] : 1.0,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : BorderStyle.solid);
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : BorderStyle.solid);
       case 'TableBorder.symmetric':
         return ({positionalArgs, namedArgs, typeArgs}) => TableBorder.symmetric(
-            inside: namedArgs.containsKey('inside') ? namedArgs['inside'] : BorderSide.none,
-            outside: namedArgs.containsKey('outside') ? namedArgs['outside'] : BorderSide.none);
+            inside: namedArgs.containsKey('inside')
+                ? namedArgs['inside']
+                : BorderSide.none,
+            outside: namedArgs.containsKey('outside')
+                ? namedArgs['outside']
+                : BorderSide.none);
       case 'TableBorder.lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TableBorder.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => TableBorder.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,7 +63,7 @@ extension TableBorderBinding on TableBorder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TableBorder');
+        return const HTType('TableBorder');
       case 'top':
         return top;
       case 'right':
@@ -64,15 +83,18 @@ extension TableBorderBinding on TableBorder {
       case 'hashCode':
         return hashCode;
       case 'scale':
-        return ({positionalArgs, namedArgs, typeArgs}) => scale(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scale(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1],
+        return ({positionalArgs, namedArgs, typeArgs}) => paint(
+            positionalArgs[0], positionalArgs[1],
             rows: namedArgs.containsKey('rows') ? namedArgs['rows'] : null,
-            columns: namedArgs.containsKey('columns') ? namedArgs['columns'] : null);
+            columns:
+                namedArgs.containsKey('columns') ? namedArgs['columns'] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/texture.g.dart b/lib/bindings/flutter/rendering/texture.g.dart
index 98bb890..3f7a13d 100644
--- a/lib/bindings/flutter/rendering/texture.g.dart
+++ b/lib/bindings/flutter/rendering/texture.g.dart
@@ -12,9 +12,11 @@ class TextureBoxAutoBinding extends HTExternalClass {
       case 'TextureBox':
         return ({positionalArgs, namedArgs, typeArgs}) => TextureBox(
             textureId: namedArgs['textureId'],
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low);
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,8 +32,8 @@ class TextureBoxAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -40,7 +42,7 @@ extension TextureBoxBinding on TextureBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextureBox');
+        return const HTType('TextureBox');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -94,36 +96,54 @@ extension TextureBoxBinding on TextureBox {
       case 'parent':
         return parent;
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'hitTestSelf':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestSelf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestSelf(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
@@ -131,102 +151,165 @@ extension TextureBoxBinding on TextureBox {
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -236,7 +319,7 @@ extension TextureBoxBinding on TextureBox {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -255,7 +338,7 @@ extension TextureBoxBinding on TextureBox {
         filterQuality = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/tweens.g.dart b/lib/bindings/flutter/rendering/tweens.g.dart
index 156e930..862e9f5 100644
--- a/lib/bindings/flutter/rendering/tweens.g.dart
+++ b/lib/bindings/flutter/rendering/tweens.g.dart
@@ -12,7 +12,7 @@ class FractionalOffsetTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,25 +31,30 @@ extension FractionalOffsetTweenBinding on FractionalOffsetTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FractionalOffsetTween');
+        return const HTType('FractionalOffsetTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,7 +67,7 @@ extension FractionalOffsetTweenBinding on FractionalOffsetTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -78,7 +83,7 @@ class AlignmentTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -97,25 +102,30 @@ extension AlignmentTweenBinding on AlignmentTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AlignmentTween');
+        return const HTType('AlignmentTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -128,7 +138,7 @@ extension AlignmentTweenBinding on AlignmentTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -140,11 +150,13 @@ class AlignmentGeometryTweenAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AlignmentGeometryTween':
-        return ({positionalArgs, namedArgs, typeArgs}) => AlignmentGeometryTween(
-            begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AlignmentGeometryTween(
+                begin:
+                    namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
+                end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -163,25 +175,30 @@ extension AlignmentGeometryTweenBinding on AlignmentGeometryTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AlignmentGeometryTween');
+        return const HTType('AlignmentGeometryTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -194,7 +211,7 @@ extension AlignmentGeometryTweenBinding on AlignmentGeometryTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/view.g.dart b/lib/bindings/flutter/rendering/view.g.dart
index 1397fa2..7563058 100644
--- a/lib/bindings/flutter/rendering/view.g.dart
+++ b/lib/bindings/flutter/rendering/view.g.dart
@@ -12,9 +12,11 @@ class ViewConfigurationAutoBinding extends HTExternalClass {
       case 'ViewConfiguration':
         return ({positionalArgs, namedArgs, typeArgs}) => ViewConfiguration(
             size: namedArgs.containsKey('size') ? namedArgs['size'] : Size.zero,
-            devicePixelRatio: namedArgs.containsKey('devicePixelRatio') ? namedArgs['devicePixelRatio'] : 1.0);
+            devicePixelRatio: namedArgs.containsKey('devicePixelRatio')
+                ? namedArgs['devicePixelRatio']
+                : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +30,7 @@ extension ViewConfigurationBinding on ViewConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ViewConfiguration');
+        return const HTType('ViewConfiguration');
       case 'size':
         return size;
       case 'devicePixelRatio':
@@ -38,7 +40,7 @@ extension ViewConfigurationBinding on ViewConfiguration {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -55,7 +57,7 @@ class RenderViewAutoBinding extends HTExternalClass {
             configuration: namedArgs['configuration'],
             window: namedArgs['window']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,8 +73,8 @@ class RenderViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -81,7 +83,7 @@ extension RenderViewBinding on RenderView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderView');
+        return const HTType('RenderView');
       case 'automaticSystemUiAdjustment':
         return automaticSystemUiAdjustment;
       case 'parentData':
@@ -131,122 +133,183 @@ extension RenderViewBinding on RenderView {
       case 'prepareInitialFrame':
         return ({positionalArgs, namedArgs, typeArgs}) => prepareInitialFrame();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'hitTestMouseTrackers':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestMouseTrackers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestMouseTrackers(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'compositeFrame':
         return ({positionalArgs, namedArgs, typeArgs}) => compositeFrame();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -265,7 +328,7 @@ extension RenderViewBinding on RenderView {
         configuration = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/viewport.g.dart b/lib/bindings/flutter/rendering/viewport.g.dart
index c964d0a..c8aaaf4 100644
--- a/lib/bindings/flutter/rendering/viewport.g.dart
+++ b/lib/bindings/flutter/rendering/viewport.g.dart
@@ -16,7 +16,7 @@ class CacheExtentStyleAutoBinding extends HTExternalClass {
       case 'CacheExtentStyle.viewport':
         return CacheExtentStyle.viewport;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class CacheExtentStyleAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CacheExtentStyle');
+        return const HTType('CacheExtentStyle');
       case 'index':
         return (instance as CacheExtentStyle).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as CacheExtentStyle).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as CacheExtentStyle).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,11 +43,12 @@ class RenderAbstractViewportAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderAbstractViewport.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderAbstractViewport.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderAbstractViewport.of(positionalArgs[0]);
       case 'RenderAbstractViewport.defaultCacheExtent':
         return RenderAbstractViewport.defaultCacheExtent;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -58,10 +60,10 @@ class RevealedOffsetAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RevealedOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            RevealedOffset(offset: namedArgs['offset'], rect: namedArgs['rect']);
+        return ({positionalArgs, namedArgs, typeArgs}) => RevealedOffset(
+            offset: namedArgs['offset'], rect: namedArgs['rect']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -75,7 +77,7 @@ extension RevealedOffsetBinding on RevealedOffset {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RevealedOffset');
+        return const HTType('RevealedOffset');
       case 'offset':
         return offset;
       case 'rect':
@@ -83,7 +85,7 @@ extension RevealedOffsetBinding on RevealedOffset {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -96,22 +98,32 @@ class RenderViewportAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderViewport':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderViewport(
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : AxisDirection.down,
             crossAxisDirection: namedArgs['crossAxisDirection'],
             offset: namedArgs['offset'],
             anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
-            children: namedArgs.containsKey('children') ? List<RenderSliver>.from(namedArgs['children']) : null,
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : null,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            cacheExtentStyle:
-                namedArgs.containsKey('cacheExtentStyle') ? namedArgs['cacheExtentStyle'] : CacheExtentStyle.pixel,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            children: namedArgs.containsKey('children')
+                ? List<RenderSliver>.from(namedArgs['children'])
+                : null,
+            center:
+                namedArgs.containsKey('center') ? namedArgs['center'] : null,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            cacheExtentStyle: namedArgs.containsKey('cacheExtentStyle')
+                ? namedArgs['cacheExtentStyle']
+                : CacheExtentStyle.pixel,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'RenderViewport.useTwoPaneSemantics':
         return RenderViewport.useTwoPaneSemantics;
       case 'RenderViewport.excludeFromScrolling':
         return RenderViewport.excludeFromScrolling;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -127,8 +139,8 @@ class RenderViewportAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -137,7 +149,7 @@ extension RenderViewportBinding on RenderViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderViewport');
+        return const HTType('RenderViewport');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -217,201 +229,305 @@ extension RenderViewportBinding on RenderViewport {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'updateOutOfBandData':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateOutOfBandData(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateOutOfBandData(positionalArgs[0], positionalArgs[1]);
       case 'updateChildLayoutOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            updateChildLayoutOffset(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            updateChildLayoutOffset(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'paintOffsetOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintOffsetOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintOffsetOf(positionalArgs[0]);
       case 'scrollOffsetOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => scrollOffsetOf(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scrollOffsetOf(positionalArgs[0], positionalArgs[1]);
       case 'maxScrollObstructionExtentBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxScrollObstructionExtentBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxScrollObstructionExtentBefore(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'computeChildMainAxisPosition':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             computeChildMainAxisPosition(positionalArgs[0], positionalArgs[1]);
       case 'labelForChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => labelForChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            labelForChild(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'getOffsetToReveal':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(positionalArgs[0], positionalArgs[1],
+        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(
+            positionalArgs[0], positionalArgs[1],
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderSliver>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderSliver>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -430,26 +546,34 @@ extension RenderViewportBinding on RenderViewport {
         center = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderShrinkWrappingViewportAutoBinding extends HTExternalClass {
-  RenderShrinkWrappingViewportAutoBinding() : super('RenderShrinkWrappingViewport');
+  RenderShrinkWrappingViewportAutoBinding()
+      : super('RenderShrinkWrappingViewport');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderShrinkWrappingViewport':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderShrinkWrappingViewport(
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down,
-            crossAxisDirection: namedArgs['crossAxisDirection'],
-            offset: namedArgs['offset'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<RenderSliver>.from(namedArgs['children']) : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderShrinkWrappingViewport(
+                axisDirection: namedArgs.containsKey('axisDirection')
+                    ? namedArgs['axisDirection']
+                    : AxisDirection.down,
+                crossAxisDirection: namedArgs['crossAxisDirection'],
+                offset: namedArgs['offset'],
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.hardEdge,
+                children: namedArgs.containsKey('children')
+                    ? List<RenderSliver>.from(namedArgs['children'])
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -465,8 +589,8 @@ class RenderShrinkWrappingViewportAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -475,7 +599,7 @@ extension RenderShrinkWrappingViewportBinding on RenderShrinkWrappingViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderShrinkWrappingViewport');
+        return const HTType('RenderShrinkWrappingViewport');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -549,201 +673,305 @@ extension RenderShrinkWrappingViewportBinding on RenderShrinkWrappingViewport {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'debugThrowIfNotCheckingIntrinsics':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugThrowIfNotCheckingIntrinsics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugThrowIfNotCheckingIntrinsics();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'updateOutOfBandData':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateOutOfBandData(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateOutOfBandData(positionalArgs[0], positionalArgs[1]);
       case 'updateChildLayoutOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            updateChildLayoutOffset(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            updateChildLayoutOffset(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'paintOffsetOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintOffsetOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintOffsetOf(positionalArgs[0]);
       case 'scrollOffsetOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => scrollOffsetOf(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scrollOffsetOf(positionalArgs[0], positionalArgs[1]);
       case 'maxScrollObstructionExtentBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxScrollObstructionExtentBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxScrollObstructionExtentBefore(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'computeChildMainAxisPosition':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             computeChildMainAxisPosition(positionalArgs[0], positionalArgs[1]);
       case 'labelForChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => labelForChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            labelForChild(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'getOffsetToReveal':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(positionalArgs[0], positionalArgs[1],
+        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(
+            positionalArgs[0], positionalArgs[1],
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderSliver>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderSliver>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -756,7 +984,7 @@ extension RenderShrinkWrappingViewportBinding on RenderShrinkWrappingViewport {
         debugCreator = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/viewport_offset.g.dart b/lib/bindings/flutter/rendering/viewport_offset.g.dart
index 2a2330c..ae38576 100644
--- a/lib/bindings/flutter/rendering/viewport_offset.g.dart
+++ b/lib/bindings/flutter/rendering/viewport_offset.g.dart
@@ -16,7 +16,7 @@ class ScrollDirectionAutoBinding extends HTExternalClass {
       case 'ScrollDirection.reverse':
         return ScrollDirection.reverse;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class ScrollDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollDirection');
+        return const HTType('ScrollDirection');
       case 'index':
         return (instance as ScrollDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ScrollDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ScrollDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,11 +43,12 @@ class ViewportOffsetAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ViewportOffset.fixed':
-        return ({positionalArgs, namedArgs, typeArgs}) => ViewportOffset.fixed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ViewportOffset.fixed(positionalArgs[0]);
       case 'ViewportOffset.zero':
         return ({positionalArgs, namedArgs, typeArgs}) => ViewportOffset.zero();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -57,7 +59,8 @@ class ViewportOffsetAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -66,7 +69,7 @@ extension ViewportOffsetBinding on ViewportOffset {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ViewportOffset');
+        return const HTType('ViewportOffset');
       case 'pixels':
         return pixels;
       case 'hasPixels':
@@ -76,34 +79,47 @@ extension ViewportOffsetBinding on ViewportOffset {
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'applyViewportDimension':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyViewportDimension(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyViewportDimension(positionalArgs[0]);
       case 'applyContentDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyContentDimensions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyContentDimensions(positionalArgs[0], positionalArgs[1]);
       case 'correctBy':
-        return ({positionalArgs, namedArgs, typeArgs}) => correctBy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            correctBy(positionalArgs[0]);
       case 'jumpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            jumpTo(positionalArgs[0]);
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'moveTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => moveTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => moveTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null,
             clamp: namedArgs.containsKey('clamp') ? namedArgs['clamp'] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/rendering/wrap.g.dart b/lib/bindings/flutter/rendering/wrap.g.dart
index 24026fd..09474ee 100644
--- a/lib/bindings/flutter/rendering/wrap.g.dart
+++ b/lib/bindings/flutter/rendering/wrap.g.dart
@@ -24,7 +24,7 @@ class WrapAlignmentAutoBinding extends HTExternalClass {
       case 'WrapAlignment.spaceEvenly':
         return WrapAlignment.spaceEvenly;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,13 +32,14 @@ class WrapAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WrapAlignment');
+        return const HTType('WrapAlignment');
       case 'index':
         return (instance as WrapAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as WrapAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as WrapAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -58,7 +59,7 @@ class WrapCrossAlignmentAutoBinding extends HTExternalClass {
       case 'WrapCrossAlignment.center':
         return WrapCrossAlignment.center;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,13 +67,14 @@ class WrapCrossAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WrapCrossAlignment');
+        return const HTType('WrapCrossAlignment');
       case 'index':
         return (instance as WrapCrossAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as WrapCrossAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as WrapCrossAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -86,7 +88,7 @@ class WrapParentDataAutoBinding extends HTExternalClass {
       case 'WrapParentData':
         return ({positionalArgs, namedArgs, typeArgs}) => WrapParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -105,7 +107,7 @@ extension WrapParentDataBinding on WrapParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WrapParentData');
+        return const HTType('WrapParentData');
       case 'offset':
         return offset;
       case 'detach':
@@ -113,7 +115,7 @@ extension WrapParentDataBinding on WrapParentData {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -123,7 +125,7 @@ extension WrapParentDataBinding on WrapParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -136,21 +138,37 @@ class RenderWrapAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RenderWrap':
         return ({positionalArgs, namedArgs, typeArgs}) => RenderWrap(
-            children: namedArgs.containsKey('children') ? List<RenderBox>.from(namedArgs['children']) : null,
-            direction: namedArgs.containsKey('direction') ? namedArgs['direction'] : Axis.horizontal,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : WrapAlignment.start,
-            spacing: namedArgs.containsKey('spacing') ? namedArgs['spacing'] : 0.0,
-            runAlignment: namedArgs.containsKey('runAlignment') ? namedArgs['runAlignment'] : WrapAlignment.start,
-            runSpacing: namedArgs.containsKey('runSpacing') ? namedArgs['runSpacing'] : 0.0,
+            children: namedArgs.containsKey('children')
+                ? List<RenderBox>.from(namedArgs['children'])
+                : null,
+            direction: namedArgs.containsKey('direction')
+                ? namedArgs['direction']
+                : Axis.horizontal,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : WrapAlignment.start,
+            spacing:
+                namedArgs.containsKey('spacing') ? namedArgs['spacing'] : 0.0,
+            runAlignment: namedArgs.containsKey('runAlignment')
+                ? namedArgs['runAlignment']
+                : WrapAlignment.start,
+            runSpacing: namedArgs.containsKey('runSpacing')
+                ? namedArgs['runSpacing']
+                : 0.0,
             crossAxisAlignment: namedArgs.containsKey('crossAxisAlignment')
                 ? namedArgs['crossAxisAlignment']
                 : WrapCrossAlignment.start,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            verticalDirection:
-                namedArgs.containsKey('verticalDirection') ? namedArgs['verticalDirection'] : VerticalDirection.down,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            verticalDirection: namedArgs.containsKey('verticalDirection')
+                ? namedArgs['verticalDirection']
+                : VerticalDirection.down,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -166,8 +184,8 @@ class RenderWrapAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -176,7 +194,7 @@ extension RenderWrapBinding on RenderWrap {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderWrap');
+        return const HTType('RenderWrap');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -246,58 +264,81 @@ extension RenderWrapBinding on RenderWrap {
       case 'parent':
         return parent;
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'computeDistanceToActualBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDistanceToActualBaseline(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDistanceToActualBaseline(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderBox>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderBox>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'defaultComputeDistanceToFirstActualBaseline':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToFirstActualBaseline(positionalArgs[0]);
@@ -305,134 +346,211 @@ extension RenderWrapBinding on RenderWrap {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             defaultComputeDistanceToHighestActualBaseline(positionalArgs[0]);
       case 'defaultHitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultHitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultHitTestChildren(positionalArgs[0],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : null);
       case 'defaultPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => defaultPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            defaultPaint(positionalArgs[0], positionalArgs[1]);
       case 'getChildrenAsList':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildrenAsList();
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -472,7 +590,7 @@ extension RenderWrapBinding on RenderWrap {
         clipBehavior = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/scheduler/binding.g.dart b/lib/bindings/flutter/scheduler/binding.g.dart
index 847aa6c..f6b2a8a 100644
--- a/lib/bindings/flutter/scheduler/binding.g.dart
+++ b/lib/bindings/flutter/scheduler/binding.g.dart
@@ -20,7 +20,7 @@ class SchedulerPhaseAutoBinding extends HTExternalClass {
       case 'SchedulerPhase.postFrameCallbacks':
         return SchedulerPhase.postFrameCallbacks;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,13 +28,14 @@ class SchedulerPhaseAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SchedulerPhase');
+        return const HTType('SchedulerPhase');
       case 'index':
         return (instance as SchedulerPhase).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SchedulerPhase).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SchedulerPhase).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/scheduler/priority.g.dart b/lib/bindings/flutter/scheduler/priority.g.dart
index e3dc895..8b21f80 100644
--- a/lib/bindings/flutter/scheduler/priority.g.dart
+++ b/lib/bindings/flutter/scheduler/priority.g.dart
@@ -16,7 +16,7 @@ class PriorityAutoBinding extends HTExternalClass {
       case 'Priority.kMaxOffset':
         return Priority.kMaxOffset;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/scheduler/ticker.g.dart b/lib/bindings/flutter/scheduler/ticker.g.dart
index 8545de2..d625f2e 100644
--- a/lib/bindings/flutter/scheduler/ticker.g.dart
+++ b/lib/bindings/flutter/scheduler/ticker.g.dart
@@ -8,10 +8,13 @@ class TickerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Ticker':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Ticker(positionalArgs[0], debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Ticker(
+            positionalArgs[0],
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,8 +30,8 @@ class TickerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -37,7 +40,7 @@ extension TickerBinding on Ticker {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Ticker');
+        return const HTType('Ticker');
       case 'debugLabel':
         return debugLabel;
       case 'muted':
@@ -49,19 +52,25 @@ extension TickerBinding on Ticker {
       case 'start':
         return ({positionalArgs, namedArgs, typeArgs}) => start();
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0]);
-      case 'stop':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            stop(canceled: namedArgs.containsKey('canceled') ? namedArgs['canceled'] : false);
+            describeForError(positionalArgs[0]);
+      case 'stop':
+        return ({positionalArgs, namedArgs, typeArgs}) => stop(
+            canceled: namedArgs.containsKey('canceled')
+                ? namedArgs['canceled']
+                : false);
       case 'absorbTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => absorbTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            absorbTicker(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            debugIncludeStack: namedArgs.containsKey('debugIncludeStack') ? namedArgs['debugIncludeStack'] : false);
+            debugIncludeStack: namedArgs.containsKey('debugIncludeStack')
+                ? namedArgs['debugIncludeStack']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,7 +80,7 @@ extension TickerBinding on Ticker {
         muted = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -83,9 +92,10 @@ class TickerFutureAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TickerFuture.complete':
-        return ({positionalArgs, namedArgs, typeArgs}) => TickerFuture.complete();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TickerFuture.complete();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -96,7 +106,8 @@ class TickerFutureAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -105,28 +116,36 @@ extension TickerFutureBinding on TickerFuture {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TickerFuture');
+        return const HTType('TickerFuture');
       case 'orCancel':
         return orCancel;
       case 'whenCompleteOrCancel':
-        return ({positionalArgs, namedArgs, typeArgs}) => whenCompleteOrCancel(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            whenCompleteOrCancel(positionalArgs[0]);
       case 'asStream':
         return ({positionalArgs, namedArgs, typeArgs}) => asStream();
       case 'catchError':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            catchError(positionalArgs[0], test: namedArgs.containsKey('test') ? namedArgs['test'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => catchError(
+            positionalArgs[0],
+            test: namedArgs.containsKey('test') ? namedArgs['test'] : null);
       case 'then':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            then(positionalArgs[0], onError: namedArgs.containsKey('onError') ? namedArgs['onError'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => then(
+            positionalArgs[0],
+            onError:
+                namedArgs.containsKey('onError') ? namedArgs['onError'] : null);
       case 'timeout':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            timeout(positionalArgs[0], onTimeout: namedArgs.containsKey('onTimeout') ? namedArgs['onTimeout'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => timeout(
+            positionalArgs[0],
+            onTimeout: namedArgs.containsKey('onTimeout')
+                ? namedArgs['onTimeout']
+                : null);
       case 'whenComplete':
-        return ({positionalArgs, namedArgs, typeArgs}) => whenComplete(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            whenComplete(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -138,10 +157,10 @@ class TickerCanceledAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TickerCanceled':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TickerCanceled(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => TickerCanceled(
+            positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -155,13 +174,13 @@ extension TickerCanceledBinding on TickerCanceled {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TickerCanceled');
+        return const HTType('TickerCanceled');
       case 'ticker':
         return ticker;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/semantics/semantics.g.dart b/lib/bindings/flutter/semantics/semantics.g.dart
index 2eadc90..0a57740 100644
--- a/lib/bindings/flutter/semantics/semantics.g.dart
+++ b/lib/bindings/flutter/semantics/semantics.g.dart
@@ -15,7 +15,7 @@ class DebugSemanticsDumpOrderAutoBinding extends HTExternalClass {
       case 'DebugSemanticsDumpOrder.traversalOrder':
         return DebugSemanticsDumpOrder.traversalOrder;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,13 +23,14 @@ class DebugSemanticsDumpOrderAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DebugSemanticsDumpOrder');
+        return const HTType('DebugSemanticsDumpOrder');
       case 'index':
         return (instance as DebugSemanticsDumpOrder).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DebugSemanticsDumpOrder).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DebugSemanticsDumpOrder).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -41,9 +42,10 @@ class SemanticsTagAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SemanticsTag':
-        return ({positionalArgs, namedArgs, typeArgs}) => SemanticsTag(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SemanticsTag(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -57,13 +59,13 @@ extension SemanticsTagBinding on SemanticsTag {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsTag');
+        return const HTType('SemanticsTag');
       case 'name':
         return name;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -75,16 +77,20 @@ class CustomSemanticsActionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CustomSemanticsAction':
-        return ({positionalArgs, namedArgs, typeArgs}) => CustomSemanticsAction(label: namedArgs['label']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CustomSemanticsAction(label: namedArgs['label']);
       case 'CustomSemanticsAction.overridingAction':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            CustomSemanticsAction.overridingAction(hint: namedArgs['hint'], action: namedArgs['action']);
+            CustomSemanticsAction.overridingAction(
+                hint: namedArgs['hint'], action: namedArgs['action']);
       case 'CustomSemanticsAction.getIdentifier':
-        return ({positionalArgs, namedArgs, typeArgs}) => CustomSemanticsAction.getIdentifier(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CustomSemanticsAction.getIdentifier(positionalArgs[0]);
       case 'CustomSemanticsAction.getAction':
-        return ({positionalArgs, namedArgs, typeArgs}) => CustomSemanticsAction.getAction(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CustomSemanticsAction.getAction(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -98,7 +104,7 @@ extension CustomSemanticsActionBinding on CustomSemanticsAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CustomSemanticsAction');
+        return const HTType('CustomSemanticsAction');
       case 'label':
         return label;
       case 'hint':
@@ -110,7 +116,7 @@ extension CustomSemanticsActionBinding on CustomSemanticsAction {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -144,12 +150,15 @@ class SemanticsDataAutoBinding extends HTExternalClass {
             maxValueLength: namedArgs['maxValueLength'],
             currentValueLength: namedArgs['currentValueLength'],
             tags: namedArgs.containsKey('tags') ? namedArgs['tags'] : null,
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            customSemanticsActionIds: namedArgs.containsKey('customSemanticsActionIds')
-                ? List<int>.from(namedArgs['customSemanticsActionIds'])
-                : null);
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
+            customSemanticsActionIds:
+                namedArgs.containsKey('customSemanticsActionIds')
+                    ? List<int>.from(namedArgs['customSemanticsActionIds'])
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -163,7 +172,7 @@ extension SemanticsDataBinding on SemanticsData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsData');
+        return const HTType('SemanticsData');
       case 'flags':
         return flags;
       case 'actions':
@@ -213,22 +222,27 @@ extension SemanticsDataBinding on SemanticsData {
       case 'hashCode':
         return hashCode;
       case 'hasFlag':
-        return ({positionalArgs, namedArgs, typeArgs}) => hasFlag(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hasFlag(positionalArgs[0]);
       case 'hasAction':
-        return ({positionalArgs, namedArgs, typeArgs}) => hasAction(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hasAction(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -240,11 +254,16 @@ class SemanticsHintOverridesAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SemanticsHintOverrides':
-        return ({positionalArgs, namedArgs, typeArgs}) => SemanticsHintOverrides(
-            onTapHint: namedArgs.containsKey('onTapHint') ? namedArgs['onTapHint'] : null,
-            onLongPressHint: namedArgs.containsKey('onLongPressHint') ? namedArgs['onLongPressHint'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SemanticsHintOverrides(
+                onTapHint: namedArgs.containsKey('onTapHint')
+                    ? namedArgs['onTapHint']
+                    : null,
+                onLongPressHint: namedArgs.containsKey('onLongPressHint')
+                    ? namedArgs['onLongPressHint']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -258,7 +277,7 @@ extension SemanticsHintOverridesBinding on SemanticsHintOverrides {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsHintOverrides');
+        return const HTType('SemanticsHintOverrides');
       case 'onTapHint':
         return onTapHint;
       case 'onLongPressHint':
@@ -268,16 +287,26 @@ extension SemanticsHintOverridesBinding on SemanticsHintOverrides {
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -285,10 +314,12 @@ extension SemanticsHintOverridesBinding on SemanticsHintOverrides {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -301,41 +332,86 @@ class SemanticsPropertiesAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SemanticsProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => SemanticsProperties(
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
-            checked: namedArgs.containsKey('checked') ? namedArgs['checked'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : null,
-            toggled: namedArgs.containsKey('toggled') ? namedArgs['toggled'] : null,
-            button: namedArgs.containsKey('button') ? namedArgs['button'] : null,
+            enabled:
+                namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
+            checked:
+                namedArgs.containsKey('checked') ? namedArgs['checked'] : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : null,
+            toggled:
+                namedArgs.containsKey('toggled') ? namedArgs['toggled'] : null,
+            button:
+                namedArgs.containsKey('button') ? namedArgs['button'] : null,
             link: namedArgs.containsKey('link') ? namedArgs['link'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            textField: namedArgs.containsKey('textField') ? namedArgs['textField'] : null,
-            slider: namedArgs.containsKey('slider') ? namedArgs['slider'] : null,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : null,
-            focusable: namedArgs.containsKey('focusable') ? namedArgs['focusable'] : null,
-            focused: namedArgs.containsKey('focused') ? namedArgs['focused'] : null,
-            inMutuallyExclusiveGroup:
-                namedArgs.containsKey('inMutuallyExclusiveGroup') ? namedArgs['inMutuallyExclusiveGroup'] : null,
-            hidden: namedArgs.containsKey('hidden') ? namedArgs['hidden'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            multiline: namedArgs.containsKey('multiline') ? namedArgs['multiline'] : null,
-            scopesRoute: namedArgs.containsKey('scopesRoute') ? namedArgs['scopesRoute'] : null,
-            namesRoute: namedArgs.containsKey('namesRoute') ? namedArgs['namesRoute'] : null,
+            header:
+                namedArgs.containsKey('header') ? namedArgs['header'] : null,
+            textField: namedArgs.containsKey('textField')
+                ? namedArgs['textField']
+                : null,
+            slider:
+                namedArgs.containsKey('slider') ? namedArgs['slider'] : null,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : null,
+            focusable: namedArgs.containsKey('focusable')
+                ? namedArgs['focusable']
+                : null,
+            focused:
+                namedArgs.containsKey('focused') ? namedArgs['focused'] : null,
+            inMutuallyExclusiveGroup: namedArgs.containsKey('inMutuallyExclusiveGroup')
+                ? namedArgs['inMutuallyExclusiveGroup']
+                : null,
+            hidden:
+                namedArgs.containsKey('hidden') ? namedArgs['hidden'] : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            multiline: namedArgs.containsKey('multiline')
+                ? namedArgs['multiline']
+                : null,
+            scopesRoute: namedArgs.containsKey('scopesRoute')
+                ? namedArgs['scopesRoute']
+                : null,
+            namesRoute: namedArgs.containsKey('namesRoute')
+                ? namedArgs['namesRoute']
+                : null,
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            liveRegion: namedArgs.containsKey('liveRegion') ? namedArgs['liveRegion'] : null,
-            maxValueLength: namedArgs.containsKey('maxValueLength') ? namedArgs['maxValueLength'] : null,
-            currentValueLength: namedArgs.containsKey('currentValueLength') ? namedArgs['currentValueLength'] : null,
+            liveRegion: namedArgs.containsKey('liveRegion')
+                ? namedArgs['liveRegion']
+                : null,
+            maxValueLength: namedArgs.containsKey('maxValueLength')
+                ? namedArgs['maxValueLength']
+                : null,
+            currentValueLength: namedArgs.containsKey('currentValueLength')
+                ? namedArgs['currentValueLength']
+                : null,
             label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            increasedValue: namedArgs.containsKey('increasedValue') ? namedArgs['increasedValue'] : null,
-            decreasedValue: namedArgs.containsKey('decreasedValue') ? namedArgs['decreasedValue'] : null,
+            increasedValue: namedArgs.containsKey('increasedValue')
+                ? namedArgs['increasedValue']
+                : null,
+            decreasedValue: namedArgs.containsKey('decreasedValue')
+                ? namedArgs['decreasedValue']
+                : null,
             hint: namedArgs.containsKey('hint') ? namedArgs['hint'] : null,
-            hintOverrides: namedArgs.containsKey('hintOverrides') ? namedArgs['hintOverrides'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            sortKey: namedArgs.containsKey('sortKey') ? namedArgs['sortKey'] : null,
-            tagForChildren: namedArgs.containsKey('tagForChildren') ? namedArgs['tagForChildren'] : null,
+            hintOverrides: namedArgs.containsKey('hintOverrides')
+                ? namedArgs['hintOverrides']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            sortKey:
+                namedArgs.containsKey('sortKey') ? namedArgs['sortKey'] : null,
+            tagForChildren: namedArgs.containsKey('tagForChildren')
+                ? namedArgs['tagForChildren']
+                : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onScrollLeft: namedArgs.containsKey('onScrollLeft') ? namedArgs['onScrollLeft'] : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            onScrollLeft:
+                namedArgs.containsKey('onScrollLeft') ? namedArgs['onScrollLeft'] : null,
             onScrollRight: namedArgs.containsKey('onScrollRight') ? namedArgs['onScrollRight'] : null,
             onScrollUp: namedArgs.containsKey('onScrollUp') ? namedArgs['onScrollUp'] : null,
             onScrollDown: namedArgs.containsKey('onScrollDown') ? namedArgs['onScrollDown'] : null,
@@ -344,26 +420,17 @@ class SemanticsPropertiesAutoBinding extends HTExternalClass {
             onCopy: namedArgs.containsKey('onCopy') ? namedArgs['onCopy'] : null,
             onCut: namedArgs.containsKey('onCut') ? namedArgs['onCut'] : null,
             onPaste: namedArgs.containsKey('onPaste') ? namedArgs['onPaste'] : null,
-            onMoveCursorForwardByCharacter: namedArgs.containsKey('onMoveCursorForwardByCharacter')
-                ? namedArgs['onMoveCursorForwardByCharacter']
-                : null,
-            onMoveCursorBackwardByCharacter: namedArgs.containsKey('onMoveCursorBackwardByCharacter')
-                ? namedArgs['onMoveCursorBackwardByCharacter']
-                : null,
-            onMoveCursorForwardByWord:
-                namedArgs.containsKey('onMoveCursorForwardByWord') ? namedArgs['onMoveCursorForwardByWord'] : null,
-            onMoveCursorBackwardByWord:
-                namedArgs.containsKey('onMoveCursorBackwardByWord') ? namedArgs['onMoveCursorBackwardByWord'] : null,
+            onMoveCursorForwardByCharacter: namedArgs.containsKey('onMoveCursorForwardByCharacter') ? namedArgs['onMoveCursorForwardByCharacter'] : null,
+            onMoveCursorBackwardByCharacter: namedArgs.containsKey('onMoveCursorBackwardByCharacter') ? namedArgs['onMoveCursorBackwardByCharacter'] : null,
+            onMoveCursorForwardByWord: namedArgs.containsKey('onMoveCursorForwardByWord') ? namedArgs['onMoveCursorForwardByWord'] : null,
+            onMoveCursorBackwardByWord: namedArgs.containsKey('onMoveCursorBackwardByWord') ? namedArgs['onMoveCursorBackwardByWord'] : null,
             onSetSelection: namedArgs.containsKey('onSetSelection') ? namedArgs['onSetSelection'] : null,
-            onDidGainAccessibilityFocus:
-                namedArgs.containsKey('onDidGainAccessibilityFocus') ? namedArgs['onDidGainAccessibilityFocus'] : null,
-            onDidLoseAccessibilityFocus:
-                namedArgs.containsKey('onDidLoseAccessibilityFocus') ? namedArgs['onDidLoseAccessibilityFocus'] : null,
+            onDidGainAccessibilityFocus: namedArgs.containsKey('onDidGainAccessibilityFocus') ? namedArgs['onDidGainAccessibilityFocus'] : null,
+            onDidLoseAccessibilityFocus: namedArgs.containsKey('onDidLoseAccessibilityFocus') ? namedArgs['onDidLoseAccessibilityFocus'] : null,
             onDismiss: namedArgs.containsKey('onDismiss') ? namedArgs['onDismiss'] : null,
-            customSemanticsActions:
-                namedArgs.containsKey('customSemanticsActions') ? namedArgs['customSemanticsActions'] : null);
+            customSemanticsActions: namedArgs.containsKey('customSemanticsActions') ? namedArgs['customSemanticsActions'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -374,11 +441,12 @@ class SemanticsPropertiesAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'MoveCursorHandler': (HTFunction function) =>
-          (extendSelection) => function.call(positionalArgs: [extendSelection], namedArgs: const {}),
-      'SetSelectionHandler': (HTFunction function) =>
-          (selection) => function.call(positionalArgs: [selection], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'MoveCursorHandler': (HTFunction function) => (extendSelection) =>
+          function.call(positionalArgs: [extendSelection], namedArgs: const {}),
+      'SetSelectionHandler': (HTFunction function) => (selection) =>
+          function.call(positionalArgs: [selection], namedArgs: const {}),
     };
   }
 }
@@ -387,7 +455,7 @@ extension SemanticsPropertiesBinding on SemanticsProperties {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsProperties');
+        return const HTType('SemanticsProperties');
       case 'enabled':
         return enabled;
       case 'checked':
@@ -491,27 +559,39 @@ extension SemanticsPropertiesBinding on SemanticsProperties {
       case 'customSemanticsActions':
         return customSemanticsActions;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -525,14 +605,18 @@ class SemanticsNodeAutoBinding extends HTExternalClass {
       case 'SemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => SemanticsNode(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            showOnScreen: namedArgs.containsKey('showOnScreen') ? namedArgs['showOnScreen'] : null);
+            showOnScreen: namedArgs.containsKey('showOnScreen')
+                ? namedArgs['showOnScreen']
+                : null);
       case 'SemanticsNode.root':
         return ({positionalArgs, namedArgs, typeArgs}) => SemanticsNode.root(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            showOnScreen: namedArgs.containsKey('showOnScreen') ? namedArgs['showOnScreen'] : null,
+            showOnScreen: namedArgs.containsKey('showOnScreen')
+                ? namedArgs['showOnScreen']
+                : null,
             owner: namedArgs['owner']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -548,9 +632,10 @@ class SemanticsNodeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'SemanticsNodeVisitor': (HTFunction function) =>
-          (node) => function.call(positionalArgs: [node], namedArgs: const {}) as bool,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'SemanticsNodeVisitor': (HTFunction function) => (node) =>
+          function.call(positionalArgs: [node], namedArgs: const {}) as bool,
     };
   }
 }
@@ -559,7 +644,7 @@ extension SemanticsNodeBinding on SemanticsNode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsNode');
+        return const HTType('SemanticsNode');
       case 'key':
         return key;
       case 'id':
@@ -639,59 +724,85 @@ extension SemanticsNodeBinding on SemanticsNode {
       case 'attached':
         return attached;
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'isTagged':
-        return ({positionalArgs, namedArgs, typeArgs}) => isTagged(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isTagged(positionalArgs[0]);
       case 'hasFlag':
-        return ({positionalArgs, namedArgs, typeArgs}) => hasFlag(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hasFlag(positionalArgs[0]);
       case 'updateWith':
         return ({positionalArgs, namedArgs, typeArgs}) => updateWith(
-            config: namedArgs.containsKey('config') ? namedArgs['config'] : null,
-            childrenInInversePaintOrder: namedArgs.containsKey('childrenInInversePaintOrder')
-                ? List<SemanticsNode>.from(namedArgs['childrenInInversePaintOrder'])
-                : null);
+            config:
+                namedArgs.containsKey('config') ? namedArgs['config'] : null,
+            childrenInInversePaintOrder:
+                namedArgs.containsKey('childrenInInversePaintOrder')
+                    ? List<SemanticsNode>.from(
+                        namedArgs['childrenInInversePaintOrder'])
+                    : null);
       case 'getSemanticsData':
         return ({positionalArgs, namedArgs, typeArgs}) => getSemanticsData();
       case 'sendEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendEvent(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug,
-            childOrder:
-                namedArgs.containsKey('childOrder') ? namedArgs['childOrder'] : DebugSemanticsDumpOrder.traversalOrder);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug,
+            childOrder: namedArgs.containsKey('childOrder')
+                ? namedArgs['childOrder']
+                : DebugSemanticsDumpOrder.traversalOrder);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.sparse,
-            childOrder:
-                namedArgs.containsKey('childOrder') ? namedArgs['childOrder'] : DebugSemanticsDumpOrder.traversalOrder);
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.sparse,
+            childOrder: namedArgs.containsKey('childOrder')
+                ? namedArgs['childOrder']
+                : DebugSemanticsDumpOrder.traversalOrder);
       case 'debugDescribeChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren(
-            childOrder:
-                namedArgs.containsKey('childOrder') ? namedArgs['childOrder'] : DebugSemanticsDumpOrder.inverseHitTest);
+            childOrder: namedArgs.containsKey('childOrder')
+                ? namedArgs['childOrder']
+                : DebugSemanticsDumpOrder.inverseHitTest);
       case 'debugListChildrenInOrder':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugListChildrenInOrder(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugListChildrenInOrder(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -722,7 +833,7 @@ extension SemanticsNodeBinding on SemanticsNode {
         isMergedIntoParent = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -736,7 +847,7 @@ class SemanticsOwnerAutoBinding extends HTExternalClass {
       case 'SemanticsOwner':
         return ({positionalArgs, namedArgs, typeArgs}) => SemanticsOwner();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -747,7 +858,8 @@ class SemanticsOwnerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -756,7 +868,7 @@ extension SemanticsOwnerBinding on SemanticsOwner {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsOwner');
+        return const HTType('SemanticsOwner');
       case 'rootSemanticsNode':
         return rootSemanticsNode;
       case 'dispose':
@@ -764,19 +876,25 @@ extension SemanticsOwnerBinding on SemanticsOwner {
       case 'sendSemanticsUpdate':
         return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsUpdate();
       case 'performAction':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            performAction(positionalArgs[0], positionalArgs[1], positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => performAction(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'performActionAt':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            performActionAt(positionalArgs[0], positionalArgs[1], positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => performActionAt(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -788,9 +906,10 @@ class SemanticsConfigurationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => SemanticsConfiguration();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SemanticsConfiguration();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -806,11 +925,12 @@ class SemanticsConfigurationAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'MoveCursorHandler': (HTFunction function) =>
-          (extendSelection) => function.call(positionalArgs: [extendSelection], namedArgs: const {}),
-      'SetSelectionHandler': (HTFunction function) =>
-          (selection) => function.call(positionalArgs: [selection], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'MoveCursorHandler': (HTFunction function) => (extendSelection) =>
+          function.call(positionalArgs: [extendSelection], namedArgs: const {}),
+      'SetSelectionHandler': (HTFunction function) => (selection) =>
+          function.call(positionalArgs: [selection], namedArgs: const {}),
     };
   }
 }
@@ -819,7 +939,7 @@ extension SemanticsConfigurationBinding on SemanticsConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsConfiguration');
+        return const HTType('SemanticsConfiguration');
       case 'explicitChildNodes':
         return explicitChildNodes;
       case 'isBlockingSemanticsOfPreviouslyPaintedNodes':
@@ -957,17 +1077,21 @@ extension SemanticsConfigurationBinding on SemanticsConfiguration {
       case 'tagsForChildren':
         return tagsForChildren;
       case 'getActionHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => getActionHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getActionHandler(positionalArgs[0]);
       case 'addTagForChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => addTagForChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addTagForChildren(positionalArgs[0]);
       case 'isCompatibleWith':
-        return ({positionalArgs, namedArgs, typeArgs}) => isCompatibleWith(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isCompatibleWith(positionalArgs[0]);
       case 'absorb':
-        return ({positionalArgs, namedArgs, typeArgs}) => absorb(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            absorb(positionalArgs[0]);
       case 'copy':
         return ({positionalArgs, namedArgs, typeArgs}) => copy();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1172,7 +1296,7 @@ extension SemanticsConfigurationBinding on SemanticsConfiguration {
         scrollExtentMin = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1184,10 +1308,11 @@ class OrdinalSortKeyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'OrdinalSortKey':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            OrdinalSortKey(positionalArgs[0], name: namedArgs.containsKey('name') ? namedArgs['name'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => OrdinalSortKey(
+            positionalArgs[0],
+            name: namedArgs.containsKey('name') ? namedArgs['name'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1201,28 +1326,33 @@ extension OrdinalSortKeyBinding on OrdinalSortKey {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OrdinalSortKey');
+        return const HTType('OrdinalSortKey');
       case 'order':
         return order;
       case 'name':
         return name;
       case 'doCompare':
-        return ({positionalArgs, namedArgs, typeArgs}) => doCompare(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            doCompare(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/semantics/semantics_event.g.dart b/lib/bindings/flutter/semantics/semantics_event.g.dart
index 7c4383e..06e7055 100644
--- a/lib/bindings/flutter/semantics/semantics_event.g.dart
+++ b/lib/bindings/flutter/semantics/semantics_event.g.dart
@@ -8,9 +8,10 @@ class AnnounceSemanticsEventAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AnnounceSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnnounceSemanticsEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnnounceSemanticsEvent(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +25,7 @@ extension AnnounceSemanticsEventBinding on AnnounceSemanticsEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnnounceSemanticsEvent');
+        return const HTType('AnnounceSemanticsEvent');
       case 'message':
         return message;
       case 'textDirection':
@@ -34,12 +35,13 @@ extension AnnounceSemanticsEventBinding on AnnounceSemanticsEvent {
       case 'getDataMap':
         return ({positionalArgs, namedArgs, typeArgs}) => getDataMap();
       case 'toMap':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toMap(nodeId: namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => toMap(
+            nodeId:
+                namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,9 +53,10 @@ class TooltipSemanticsEventAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TooltipSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => TooltipSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TooltipSemanticsEvent(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -67,7 +70,7 @@ extension TooltipSemanticsEventBinding on TooltipSemanticsEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TooltipSemanticsEvent');
+        return const HTType('TooltipSemanticsEvent');
       case 'message':
         return message;
       case 'type':
@@ -75,12 +78,13 @@ extension TooltipSemanticsEventBinding on TooltipSemanticsEvent {
       case 'getDataMap':
         return ({positionalArgs, namedArgs, typeArgs}) => getDataMap();
       case 'toMap':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toMap(nodeId: namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => toMap(
+            nodeId:
+                namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -92,9 +96,10 @@ class LongPressSemanticsEventAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LongPressSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => LongPressSemanticsEvent();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LongPressSemanticsEvent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -108,18 +113,19 @@ extension LongPressSemanticsEventBinding on LongPressSemanticsEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LongPressSemanticsEvent');
+        return const HTType('LongPressSemanticsEvent');
       case 'type':
         return type;
       case 'getDataMap':
         return ({positionalArgs, namedArgs, typeArgs}) => getDataMap();
       case 'toMap':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toMap(nodeId: namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => toMap(
+            nodeId:
+                namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -133,7 +139,7 @@ class TapSemanticEventAutoBinding extends HTExternalClass {
       case 'TapSemanticEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => TapSemanticEvent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -147,18 +153,19 @@ extension TapSemanticEventBinding on TapSemanticEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TapSemanticEvent');
+        return const HTType('TapSemanticEvent');
       case 'type':
         return type;
       case 'getDataMap':
         return ({positionalArgs, namedArgs, typeArgs}) => getDataMap();
       case 'toMap':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toMap(nodeId: namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => toMap(
+            nodeId:
+                namedArgs.containsKey('nodeId') ? namedArgs['nodeId'] : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/semantics/semantics_service.g.dart b/lib/bindings/flutter/semantics/semantics_service.g.dart
index 14b255d..411ba0d 100644
--- a/lib/bindings/flutter/semantics/semantics_service.g.dart
+++ b/lib/bindings/flutter/semantics/semantics_service.g.dart
@@ -11,9 +11,10 @@ class SemanticsServiceAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             SemanticsService.announce(positionalArgs[0], positionalArgs[1]);
       case 'SemanticsService.tooltip':
-        return ({positionalArgs, namedArgs, typeArgs}) => SemanticsService.tooltip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SemanticsService.tooltip(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/asset_bundle.g.dart b/lib/bindings/flutter/services/asset_bundle.g.dart
index 6c206cc..d49bd95 100644
--- a/lib/bindings/flutter/services/asset_bundle.g.dart
+++ b/lib/bindings/flutter/services/asset_bundle.g.dart
@@ -8,9 +8,10 @@ class NetworkAssetBundleAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NetworkAssetBundle':
-        return ({positionalArgs, namedArgs, typeArgs}) => NetworkAssetBundle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NetworkAssetBundle(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,20 +25,24 @@ extension NetworkAssetBundleBinding on NetworkAssetBundle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NetworkAssetBundle');
+        return const HTType('NetworkAssetBundle');
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            load(positionalArgs[0]);
       case 'loadStructuredData':
-        return ({positionalArgs, namedArgs, typeArgs}) => loadStructuredData(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            loadStructuredData(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'loadString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            loadString(positionalArgs[0], cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => loadString(
+            positionalArgs[0],
+            cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : true);
       case 'evict':
-        return ({positionalArgs, namedArgs, typeArgs}) => evict(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evict(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -51,7 +56,7 @@ class PlatformAssetBundleAutoBinding extends HTExternalClass {
       case 'PlatformAssetBundle':
         return ({positionalArgs, namedArgs, typeArgs}) => PlatformAssetBundle();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -65,20 +70,24 @@ extension PlatformAssetBundleBinding on PlatformAssetBundle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformAssetBundle');
+        return const HTType('PlatformAssetBundle');
       case 'load':
-        return ({positionalArgs, namedArgs, typeArgs}) => load(positionalArgs[0]);
-      case 'loadString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            loadString(positionalArgs[0], cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : true);
+            load(positionalArgs[0]);
+      case 'loadString':
+        return ({positionalArgs, namedArgs, typeArgs}) => loadString(
+            positionalArgs[0],
+            cache: namedArgs.containsKey('cache') ? namedArgs['cache'] : true);
       case 'loadStructuredData':
-        return ({positionalArgs, namedArgs, typeArgs}) => loadStructuredData(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            loadStructuredData(positionalArgs[0], positionalArgs[1]);
       case 'evict':
-        return ({positionalArgs, namedArgs, typeArgs}) => evict(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evict(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/autofill.g.dart b/lib/bindings/flutter/services/autofill.g.dart
index d5b058b..19f2976 100644
--- a/lib/bindings/flutter/services/autofill.g.dart
+++ b/lib/bindings/flutter/services/autofill.g.dart
@@ -140,7 +140,7 @@ class AutofillHintsAutoBinding extends HTExternalClass {
       case 'AutofillHints.username':
         return AutofillHints.username;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -157,7 +157,7 @@ class AutofillConfigurationAutoBinding extends HTExternalClass {
             autofillHints: List<String>.from(namedArgs['autofillHints']),
             currentEditingValue: namedArgs['currentEditingValue']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -171,7 +171,7 @@ extension AutofillConfigurationBinding on AutofillConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AutofillConfiguration');
+        return const HTType('AutofillConfiguration');
       case 'uniqueIdentifier':
         return uniqueIdentifier;
       case 'autofillHints':
@@ -181,7 +181,7 @@ extension AutofillConfigurationBinding on AutofillConfiguration {
       case 'toJson':
         return ({positionalArgs, namedArgs, typeArgs}) => toJson();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/clipboard.g.dart b/lib/bindings/flutter/services/clipboard.g.dart
index 7d663de..33c1b24 100644
--- a/lib/bindings/flutter/services/clipboard.g.dart
+++ b/lib/bindings/flutter/services/clipboard.g.dart
@@ -8,10 +8,10 @@ class ClipboardDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ClipboardData':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ClipboardData(text: namedArgs.containsKey('text') ? namedArgs['text'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ClipboardData(
+            text: namedArgs.containsKey('text') ? namedArgs['text'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,11 +25,11 @@ extension ClipboardDataBinding on ClipboardData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipboardData');
+        return const HTType('ClipboardData');
       case 'text':
         return text;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -41,13 +41,15 @@ class ClipboardAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Clipboard.setData':
-        return ({positionalArgs, namedArgs, typeArgs}) => Clipboard.setData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Clipboard.setData(positionalArgs[0]);
       case 'Clipboard.getData':
-        return ({positionalArgs, namedArgs, typeArgs}) => Clipboard.getData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Clipboard.getData(positionalArgs[0]);
       case 'Clipboard.kTextPlain':
         return Clipboard.kTextPlain;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/deferred_component.g.dart b/lib/bindings/flutter/services/deferred_component.g.dart
index 5523478..4e04ad3 100644
--- a/lib/bindings/flutter/services/deferred_component.g.dart
+++ b/lib/bindings/flutter/services/deferred_component.g.dart
@@ -8,13 +8,19 @@ class DeferredComponentAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DeferredComponent.installDeferredComponent':
-        return ({positionalArgs, namedArgs, typeArgs}) => DeferredComponent.installDeferredComponent(
-            moduleName: namedArgs.containsKey('moduleName') ? namedArgs['moduleName'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DeferredComponent.installDeferredComponent(
+                moduleName: namedArgs.containsKey('moduleName')
+                    ? namedArgs['moduleName']
+                    : null);
       case 'DeferredComponent.uninstallDeferredComponent':
-        return ({positionalArgs, namedArgs, typeArgs}) => DeferredComponent.uninstallDeferredComponent(
-            moduleName: namedArgs.containsKey('moduleName') ? namedArgs['moduleName'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DeferredComponent.uninstallDeferredComponent(
+                moduleName: namedArgs.containsKey('moduleName')
+                    ? namedArgs['moduleName']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/font_loader.g.dart b/lib/bindings/flutter/services/font_loader.g.dart
index 0a19d86..4b634bf 100644
--- a/lib/bindings/flutter/services/font_loader.g.dart
+++ b/lib/bindings/flutter/services/font_loader.g.dart
@@ -8,9 +8,10 @@ class FontLoaderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FontLoader':
-        return ({positionalArgs, namedArgs, typeArgs}) => FontLoader(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FontLoader(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,15 +25,16 @@ extension FontLoaderBinding on FontLoader {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FontLoader');
+        return const HTType('FontLoader');
       case 'family':
         return family;
       case 'addFont':
-        return ({positionalArgs, namedArgs, typeArgs}) => addFont(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addFont(positionalArgs[0]);
       case 'load':
         return ({positionalArgs, namedArgs, typeArgs}) => load();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/haptic_feedback.g.dart b/lib/bindings/flutter/services/haptic_feedback.g.dart
index 2dc01e3..69d2d7c 100644
--- a/lib/bindings/flutter/services/haptic_feedback.g.dart
+++ b/lib/bindings/flutter/services/haptic_feedback.g.dart
@@ -1,7 +1,6 @@
 import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/services.dart';
 
-
 class HapticFeedbackAutoBinding extends HTExternalClass {
   HapticFeedbackAutoBinding() : super('HapticFeedback');
 
@@ -9,23 +8,22 @@ class HapticFeedbackAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'HapticFeedback.vibrate':
-        return ({positionalArgs, namedArgs, typeArgs}) => HapticFeedback.vibrate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HapticFeedback.vibrate();
       case 'HapticFeedback.lightImpact':
-        return ({positionalArgs, namedArgs, typeArgs}) => HapticFeedback.lightImpact();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HapticFeedback.lightImpact();
       case 'HapticFeedback.mediumImpact':
-        return ({positionalArgs, namedArgs, typeArgs}) => HapticFeedback.mediumImpact();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HapticFeedback.mediumImpact();
       case 'HapticFeedback.heavyImpact':
-        return ({positionalArgs, namedArgs, typeArgs}) => HapticFeedback.heavyImpact();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HapticFeedback.heavyImpact();
       case 'HapticFeedback.selectionClick':
-        return ({positionalArgs, namedArgs, typeArgs}) => HapticFeedback.selectionClick();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HapticFeedback.selectionClick();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
-
-
-
-
 }
-
-
diff --git a/lib/bindings/flutter/services/keyboard_key.g.dart b/lib/bindings/flutter/services/keyboard_key.g.dart
index 3fdecce..f4c560f 100644
--- a/lib/bindings/flutter/services/keyboard_key.g.dart
+++ b/lib/bindings/flutter/services/keyboard_key.g.dart
@@ -9,15 +9,22 @@ class LogicalKeyboardKeyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LogicalKeyboardKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => LogicalKeyboardKey(positionalArgs[0],
-            debugName: namedArgs.containsKey('debugName') ? namedArgs['debugName'] : null,
-            keyLabel: namedArgs.containsKey('keyLabel') ? namedArgs['keyLabel'] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) => LogicalKeyboardKey(
+            positionalArgs[0],
+            debugName: namedArgs.containsKey('debugName')
+                ? namedArgs['debugName']
+                : null,
+            keyLabel:
+                namedArgs.containsKey('keyLabel') ? namedArgs['keyLabel'] : '');
       case 'LogicalKeyboardKey.findKeyByKeyId':
-        return ({positionalArgs, namedArgs, typeArgs}) => LogicalKeyboardKey.findKeyByKeyId(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LogicalKeyboardKey.findKeyByKeyId(positionalArgs[0]);
       case 'LogicalKeyboardKey.isControlCharacter':
-        return ({positionalArgs, namedArgs, typeArgs}) => LogicalKeyboardKey.isControlCharacter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LogicalKeyboardKey.isControlCharacter(positionalArgs[0]);
       case 'LogicalKeyboardKey.collapseSynonyms':
-        return ({positionalArgs, namedArgs, typeArgs}) => LogicalKeyboardKey.collapseSynonyms(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LogicalKeyboardKey.collapseSynonyms(positionalArgs[0]);
       case 'LogicalKeyboardKey.valueMask':
         return LogicalKeyboardKey.valueMask;
       case 'LogicalKeyboardKey.platformMask':
@@ -577,7 +584,7 @@ class LogicalKeyboardKeyAutoBinding extends HTExternalClass {
       case 'LogicalKeyboardKey.control':
         return LogicalKeyboardKey.control;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -591,7 +598,7 @@ extension LogicalKeyboardKeyBinding on LogicalKeyboardKey {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LogicalKeyboardKey');
+        return const HTType('LogicalKeyboardKey');
       case 'keyId':
         return keyId;
       case 'debugName':
@@ -605,18 +612,21 @@ extension LogicalKeyboardKeyBinding on LogicalKeyboardKey {
       case 'synonyms':
         return synonyms;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -628,10 +638,14 @@ class PhysicalKeyboardKeyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PhysicalKeyboardKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => PhysicalKeyboardKey(positionalArgs[0],
-            debugName: namedArgs.containsKey('debugName') ? namedArgs['debugName'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => PhysicalKeyboardKey(
+            positionalArgs[0],
+            debugName: namedArgs.containsKey('debugName')
+                ? namedArgs['debugName']
+                : null);
       case 'PhysicalKeyboardKey.findKeyByCode':
-        return ({positionalArgs, namedArgs, typeArgs}) => PhysicalKeyboardKey.findKeyByCode(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PhysicalKeyboardKey.findKeyByCode(positionalArgs[0]);
       case 'PhysicalKeyboardKey.none':
         return PhysicalKeyboardKey.none;
       case 'PhysicalKeyboardKey.hyper':
@@ -1171,7 +1185,7 @@ class PhysicalKeyboardKeyAutoBinding extends HTExternalClass {
       case 'PhysicalKeyboardKey.fn':
         return PhysicalKeyboardKey.fn;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1185,7 +1199,7 @@ extension PhysicalKeyboardKeyBinding on PhysicalKeyboardKey {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PhysicalKeyboardKey');
+        return const HTType('PhysicalKeyboardKey');
       case 'usbHidUsage':
         return usbHidUsage;
       case 'debugName':
@@ -1193,18 +1207,21 @@ extension PhysicalKeyboardKeyBinding on PhysicalKeyboardKey {
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/message_codec.g.dart b/lib/bindings/flutter/services/message_codec.g.dart
index 4c6662b..b371762 100644
--- a/lib/bindings/flutter/services/message_codec.g.dart
+++ b/lib/bindings/flutter/services/message_codec.g.dart
@@ -8,10 +8,11 @@ class MethodCallAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MethodCall':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            MethodCall(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => MethodCall(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +26,7 @@ extension MethodCallBinding on MethodCall {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MethodCall');
+        return const HTType('MethodCall');
       case 'method':
         return method;
       case 'arguments':
@@ -33,7 +34,7 @@ extension MethodCallBinding on MethodCall {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -47,11 +48,15 @@ class PlatformExceptionAutoBinding extends HTExternalClass {
       case 'PlatformException':
         return ({positionalArgs, namedArgs, typeArgs}) => PlatformException(
             code: namedArgs['code'],
-            message: namedArgs.containsKey('message') ? namedArgs['message'] : null,
-            details: namedArgs.containsKey('details') ? namedArgs['details'] : null,
-            stacktrace: namedArgs.containsKey('stacktrace') ? namedArgs['stacktrace'] : null);
+            message:
+                namedArgs.containsKey('message') ? namedArgs['message'] : null,
+            details:
+                namedArgs.containsKey('details') ? namedArgs['details'] : null,
+            stacktrace: namedArgs.containsKey('stacktrace')
+                ? namedArgs['stacktrace']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -65,7 +70,7 @@ extension PlatformExceptionBinding on PlatformException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformException');
+        return const HTType('PlatformException');
       case 'code':
         return code;
       case 'message':
@@ -77,7 +82,7 @@ extension PlatformExceptionBinding on PlatformException {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -90,9 +95,10 @@ class MissingPluginExceptionAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'MissingPluginException':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            MissingPluginException(positionalArgs.length > 0 ? positionalArgs[0] : null);
+            MissingPluginException(
+                positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -106,13 +112,13 @@ extension MissingPluginExceptionBinding on MissingPluginException {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MissingPluginException');
+        return const HTType('MissingPluginException');
       case 'message':
         return message;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/message_codecs.g.dart b/lib/bindings/flutter/services/message_codecs.g.dart
index f578141..af3e3c7 100644
--- a/lib/bindings/flutter/services/message_codecs.g.dart
+++ b/lib/bindings/flutter/services/message_codecs.g.dart
@@ -10,7 +10,7 @@ class BinaryCodecAutoBinding extends HTExternalClass {
       case 'BinaryCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => BinaryCodec();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,15 @@ extension BinaryCodecBinding on BinaryCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BinaryCodec');
+        return const HTType('BinaryCodec');
       case 'decodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeMessage(positionalArgs[0]);
       case 'encodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeMessage(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,7 +46,7 @@ class StringCodecAutoBinding extends HTExternalClass {
       case 'StringCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => StringCodec();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -58,13 +60,15 @@ extension StringCodecBinding on StringCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StringCodec');
+        return const HTType('StringCodec');
       case 'decodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeMessage(positionalArgs[0]);
       case 'encodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeMessage(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -78,7 +82,7 @@ class JSONMessageCodecAutoBinding extends HTExternalClass {
       case 'JSONMessageCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => JSONMessageCodec();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -92,13 +96,15 @@ extension JSONMessageCodecBinding on JSONMessageCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JSONMessageCodec');
+        return const HTType('JSONMessageCodec');
       case 'encodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeMessage(positionalArgs[0]);
       case 'decodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeMessage(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -112,7 +118,7 @@ class JSONMethodCodecAutoBinding extends HTExternalClass {
       case 'JSONMethodCodec':
         return ({positionalArgs, namedArgs, typeArgs}) => JSONMethodCodec();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -126,22 +132,28 @@ extension JSONMethodCodecBinding on JSONMethodCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('JSONMethodCodec');
+        return const HTType('JSONMethodCodec');
       case 'encodeMethodCall':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeMethodCall(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeMethodCall(positionalArgs[0]);
       case 'decodeMethodCall':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeMethodCall(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeMethodCall(positionalArgs[0]);
       case 'decodeEnvelope':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeEnvelope(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeEnvelope(positionalArgs[0]);
       case 'encodeSuccessEnvelope':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeSuccessEnvelope(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeSuccessEnvelope(positionalArgs[0]);
       case 'encodeErrorEnvelope':
         return ({positionalArgs, namedArgs, typeArgs}) => encodeErrorEnvelope(
             code: namedArgs.containsKey('code') ? namedArgs['code'] : null,
-            message: namedArgs.containsKey('message') ? namedArgs['message'] : null,
-            details: namedArgs.containsKey('details') ? namedArgs['details'] : null);
+            message:
+                namedArgs.containsKey('message') ? namedArgs['message'] : null,
+            details:
+                namedArgs.containsKey('details') ? namedArgs['details'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -153,9 +165,10 @@ class StandardMessageCodecAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StandardMessageCodec':
-        return ({positionalArgs, namedArgs, typeArgs}) => StandardMessageCodec();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StandardMessageCodec();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -169,23 +182,30 @@ extension StandardMessageCodecBinding on StandardMessageCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StandardMessageCodec');
+        return const HTType('StandardMessageCodec');
       case 'encodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeMessage(positionalArgs[0]);
       case 'decodeMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeMessage(positionalArgs[0]);
       case 'writeValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeValue(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            writeValue(positionalArgs[0], positionalArgs[1]);
       case 'readValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => readValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            readValue(positionalArgs[0]);
       case 'readValueOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => readValueOfType(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            readValueOfType(positionalArgs[0], positionalArgs[1]);
       case 'writeSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            writeSize(positionalArgs[0], positionalArgs[1]);
       case 'readSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => readSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            readSize(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -197,10 +217,12 @@ class StandardMethodCodecAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StandardMethodCodec':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            StandardMethodCodec(positionalArgs.length > 0 ? positionalArgs[0] : const StandardMessageCodec());
+        return ({positionalArgs, namedArgs, typeArgs}) => StandardMethodCodec(
+            positionalArgs.length > 0
+                ? positionalArgs[0]
+                : const StandardMessageCodec());
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -214,24 +236,30 @@ extension StandardMethodCodecBinding on StandardMethodCodec {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StandardMethodCodec');
+        return const HTType('StandardMethodCodec');
       case 'messageCodec':
         return messageCodec;
       case 'encodeMethodCall':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeMethodCall(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeMethodCall(positionalArgs[0]);
       case 'decodeMethodCall':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeMethodCall(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeMethodCall(positionalArgs[0]);
       case 'encodeSuccessEnvelope':
-        return ({positionalArgs, namedArgs, typeArgs}) => encodeSuccessEnvelope(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            encodeSuccessEnvelope(positionalArgs[0]);
       case 'encodeErrorEnvelope':
         return ({positionalArgs, namedArgs, typeArgs}) => encodeErrorEnvelope(
             code: namedArgs.containsKey('code') ? namedArgs['code'] : null,
-            message: namedArgs.containsKey('message') ? namedArgs['message'] : null,
-            details: namedArgs.containsKey('details') ? namedArgs['details'] : null);
+            message:
+                namedArgs.containsKey('message') ? namedArgs['message'] : null,
+            details:
+                namedArgs.containsKey('details') ? namedArgs['details'] : null);
       case 'decodeEnvelope':
-        return ({positionalArgs, namedArgs, typeArgs}) => decodeEnvelope(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            decodeEnvelope(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/platform_channel.g.dart b/lib/bindings/flutter/services/platform_channel.g.dart
index 142769a..4eadb97 100644
--- a/lib/bindings/flutter/services/platform_channel.g.dart
+++ b/lib/bindings/flutter/services/platform_channel.g.dart
@@ -10,10 +10,12 @@ class MethodChannelAutoBinding extends HTExternalClass {
       case 'MethodChannel':
         return ({positionalArgs, namedArgs, typeArgs}) => MethodChannel(
             positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : const StandardMethodCodec(),
+            positionalArgs.length > 1
+                ? positionalArgs[1]
+                : const StandardMethodCodec(),
             positionalArgs.length > 2 ? positionalArgs[2] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +29,7 @@ extension MethodChannelBinding on MethodChannel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MethodChannel');
+        return const HTType('MethodChannel');
       case 'name':
         return name;
       case 'codec':
@@ -35,24 +37,31 @@ extension MethodChannelBinding on MethodChannel {
       case 'binaryMessenger':
         return binaryMessenger;
       case 'invokeMethod':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            invokeMethod(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => invokeMethod(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'invokeListMethod':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            invokeListMethod(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => invokeListMethod(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'invokeMapMethod':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            invokeMapMethod(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => invokeMapMethod(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'setMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => setMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setMethodCallHandler(positionalArgs[0]);
       case 'checkMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => checkMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            checkMethodCallHandler(positionalArgs[0]);
       case 'setMockMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => setMockMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setMockMethodCallHandler(positionalArgs[0]);
       case 'checkMockMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => checkMockMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            checkMockMethodCallHandler(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -65,9 +74,12 @@ class OptionalMethodChannelAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'OptionalMethodChannel':
         return ({positionalArgs, namedArgs, typeArgs}) => OptionalMethodChannel(
-            positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : const StandardMethodCodec());
+            positionalArgs[0],
+            positionalArgs.length > 1
+                ? positionalArgs[1]
+                : const StandardMethodCodec());
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -81,7 +93,7 @@ extension OptionalMethodChannelBinding on OptionalMethodChannel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OptionalMethodChannel');
+        return const HTType('OptionalMethodChannel');
       case 'name':
         return name;
       case 'codec':
@@ -89,24 +101,31 @@ extension OptionalMethodChannelBinding on OptionalMethodChannel {
       case 'binaryMessenger':
         return binaryMessenger;
       case 'invokeMethod':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            invokeMethod(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => invokeMethod(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'invokeListMethod':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            invokeListMethod(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => invokeListMethod(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'invokeMapMethod':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            invokeMapMethod(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => invokeMapMethod(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'setMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => setMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setMethodCallHandler(positionalArgs[0]);
       case 'checkMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => checkMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            checkMethodCallHandler(positionalArgs[0]);
       case 'setMockMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => setMockMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setMockMethodCallHandler(positionalArgs[0]);
       case 'checkMockMethodCallHandler':
-        return ({positionalArgs, namedArgs, typeArgs}) => checkMockMethodCallHandler(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            checkMockMethodCallHandler(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -120,10 +139,12 @@ class EventChannelAutoBinding extends HTExternalClass {
       case 'EventChannel':
         return ({positionalArgs, namedArgs, typeArgs}) => EventChannel(
             positionalArgs[0],
-            positionalArgs.length > 1 ? positionalArgs[1] : const StandardMethodCodec(),
+            positionalArgs.length > 1
+                ? positionalArgs[1]
+                : const StandardMethodCodec(),
             positionalArgs.length > 2 ? positionalArgs[2] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -137,7 +158,7 @@ extension EventChannelBinding on EventChannel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EventChannel');
+        return const HTType('EventChannel');
       case 'name':
         return name;
       case 'codec':
@@ -146,9 +167,10 @@ extension EventChannelBinding on EventChannel {
         return binaryMessenger;
       case 'receiveBroadcastStream':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            receiveBroadcastStream(positionalArgs.length > 0 ? positionalArgs[0] : null);
+            receiveBroadcastStream(
+                positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/platform_views.g.dart b/lib/bindings/flutter/services/platform_views.g.dart
index a296eb2..9f23fdf 100644
--- a/lib/bindings/flutter/services/platform_views.g.dart
+++ b/lib/bindings/flutter/services/platform_views.g.dart
@@ -8,37 +8,71 @@ class PlatformViewsServiceAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PlatformViewsService.initAndroidView':
-        return ({positionalArgs, namedArgs, typeArgs}) => PlatformViewsService.initAndroidView(
-            id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
-            viewType: namedArgs.containsKey('viewType') ? namedArgs['viewType'] : null,
-            layoutDirection: namedArgs.containsKey('layoutDirection') ? namedArgs['layoutDirection'] : null,
-            creationParams: namedArgs.containsKey('creationParams') ? namedArgs['creationParams'] : null,
-            creationParamsCodec: namedArgs.containsKey('creationParamsCodec') ? namedArgs['creationParamsCodec'] : null,
-            onFocus: namedArgs.containsKey('onFocus') ? namedArgs['onFocus'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PlatformViewsService.initAndroidView(
+                id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
+                viewType: namedArgs.containsKey('viewType')
+                    ? namedArgs['viewType']
+                    : null,
+                layoutDirection: namedArgs.containsKey('layoutDirection')
+                    ? namedArgs['layoutDirection']
+                    : null,
+                creationParams: namedArgs.containsKey('creationParams')
+                    ? namedArgs['creationParams']
+                    : null,
+                creationParamsCodec:
+                    namedArgs.containsKey('creationParamsCodec')
+                        ? namedArgs['creationParamsCodec']
+                        : null,
+                onFocus: namedArgs.containsKey('onFocus')
+                    ? namedArgs['onFocus']
+                    : null);
       case 'PlatformViewsService.initSurfaceAndroidView':
-        return ({positionalArgs, namedArgs, typeArgs}) => PlatformViewsService.initSurfaceAndroidView(
-            id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
-            viewType: namedArgs.containsKey('viewType') ? namedArgs['viewType'] : null,
-            layoutDirection: namedArgs.containsKey('layoutDirection') ? namedArgs['layoutDirection'] : null,
-            creationParams: namedArgs.containsKey('creationParams') ? namedArgs['creationParams'] : null,
-            creationParamsCodec: namedArgs.containsKey('creationParamsCodec') ? namedArgs['creationParamsCodec'] : null,
-            onFocus: namedArgs.containsKey('onFocus') ? namedArgs['onFocus'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PlatformViewsService.initSurfaceAndroidView(
+                id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
+                viewType: namedArgs.containsKey('viewType')
+                    ? namedArgs['viewType']
+                    : null,
+                layoutDirection: namedArgs.containsKey('layoutDirection')
+                    ? namedArgs['layoutDirection']
+                    : null,
+                creationParams: namedArgs.containsKey('creationParams')
+                    ? namedArgs['creationParams']
+                    : null,
+                creationParamsCodec:
+                    namedArgs.containsKey('creationParamsCodec')
+                        ? namedArgs['creationParamsCodec']
+                        : null,
+                onFocus: namedArgs.containsKey('onFocus')
+                    ? namedArgs['onFocus']
+                    : null);
       case 'PlatformViewsService.initUiKitView':
-        return ({positionalArgs, namedArgs, typeArgs}) => PlatformViewsService.initUiKitView(
-            id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
-            viewType: namedArgs.containsKey('viewType') ? namedArgs['viewType'] : null,
-            layoutDirection: namedArgs.containsKey('layoutDirection') ? namedArgs['layoutDirection'] : null,
-            creationParams: namedArgs.containsKey('creationParams') ? namedArgs['creationParams'] : null,
-            creationParamsCodec:
-                namedArgs.containsKey('creationParamsCodec') ? namedArgs['creationParamsCodec'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PlatformViewsService.initUiKitView(
+                id: namedArgs.containsKey('id') ? namedArgs['id'] : null,
+                viewType: namedArgs.containsKey('viewType')
+                    ? namedArgs['viewType']
+                    : null,
+                layoutDirection: namedArgs.containsKey('layoutDirection')
+                    ? namedArgs['layoutDirection']
+                    : null,
+                creationParams: namedArgs.containsKey('creationParams')
+                    ? namedArgs['creationParams']
+                    : null,
+                creationParamsCodec:
+                    namedArgs.containsKey('creationParamsCodec')
+                        ? namedArgs['creationParamsCodec']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -51,7 +85,8 @@ class AndroidPointerPropertiesAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'AndroidPointerProperties':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            AndroidPointerProperties(id: namedArgs['id'], toolType: namedArgs['toolType']);
+            AndroidPointerProperties(
+                id: namedArgs['id'], toolType: namedArgs['toolType']);
       case 'AndroidPointerProperties.kToolTypeUnknown':
         return AndroidPointerProperties.kToolTypeUnknown;
       case 'AndroidPointerProperties.kToolTypeFinger':
@@ -63,7 +98,7 @@ class AndroidPointerPropertiesAutoBinding extends HTExternalClass {
       case 'AndroidPointerProperties.kToolTypeEraser':
         return AndroidPointerProperties.kToolTypeEraser;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -77,7 +112,7 @@ extension AndroidPointerPropertiesBinding on AndroidPointerProperties {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AndroidPointerProperties');
+        return const HTType('AndroidPointerProperties');
       case 'id':
         return id;
       case 'toolType':
@@ -85,7 +120,7 @@ extension AndroidPointerPropertiesBinding on AndroidPointerProperties {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -108,7 +143,7 @@ class AndroidPointerCoordsAutoBinding extends HTExternalClass {
             x: namedArgs['x'],
             y: namedArgs['y']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -122,7 +157,7 @@ extension AndroidPointerCoordsBinding on AndroidPointerCoords {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AndroidPointerCoords');
+        return const HTType('AndroidPointerCoords');
       case 'orientation':
         return orientation;
       case 'pressure':
@@ -144,7 +179,7 @@ extension AndroidPointerCoordsBinding on AndroidPointerCoords {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -161,8 +196,10 @@ class AndroidMotionEventAutoBinding extends HTExternalClass {
             eventTime: namedArgs['eventTime'],
             action: namedArgs['action'],
             pointerCount: namedArgs['pointerCount'],
-            pointerProperties: List<AndroidPointerProperties>.from(namedArgs['pointerProperties']),
-            pointerCoords: List<AndroidPointerCoords>.from(namedArgs['pointerCoords']),
+            pointerProperties: List<AndroidPointerProperties>.from(
+                namedArgs['pointerProperties']),
+            pointerCoords:
+                List<AndroidPointerCoords>.from(namedArgs['pointerCoords']),
             metaState: namedArgs['metaState'],
             buttonState: namedArgs['buttonState'],
             xPrecision: namedArgs['xPrecision'],
@@ -173,7 +210,7 @@ class AndroidMotionEventAutoBinding extends HTExternalClass {
             flags: namedArgs['flags'],
             motionEventId: namedArgs['motionEventId']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -187,7 +224,7 @@ extension AndroidMotionEventBinding on AndroidMotionEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AndroidMotionEvent');
+        return const HTType('AndroidMotionEvent');
       case 'downTime':
         return downTime;
       case 'eventTime':
@@ -221,7 +258,7 @@ extension AndroidMotionEventBinding on AndroidMotionEvent {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -234,7 +271,8 @@ class AndroidViewControllerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'AndroidViewController.pointerAction':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            AndroidViewController.pointerAction(positionalArgs[0], positionalArgs[1]);
+            AndroidViewController.pointerAction(
+                positionalArgs[0], positionalArgs[1]);
       case 'AndroidViewController.kActionDown':
         return AndroidViewController.kActionDown;
       case 'AndroidViewController.kActionUp':
@@ -252,7 +290,7 @@ class AndroidViewControllerAutoBinding extends HTExternalClass {
       case 'AndroidViewController.kAndroidLayoutDirectionRtl':
         return AndroidViewController.kAndroidLayoutDirectionRtl;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard.g.dart b/lib/bindings/flutter/services/raw_keyboard.g.dart
index f42ad85..7d8533e 100644
--- a/lib/bindings/flutter/services/raw_keyboard.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard.g.dart
@@ -19,7 +19,7 @@ class KeyboardSideAutoBinding extends HTExternalClass {
       case 'KeyboardSide.all':
         return KeyboardSide.all;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +27,14 @@ class KeyboardSideAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('KeyboardSide');
+        return const HTType('KeyboardSide');
       case 'index':
         return (instance as KeyboardSide).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as KeyboardSide).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as KeyboardSide).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -65,7 +66,7 @@ class ModifierKeyAutoBinding extends HTExternalClass {
       case 'ModifierKey.symbolModifier':
         return ModifierKey.symbolModifier;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -73,13 +74,14 @@ class ModifierKeyAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ModifierKey');
+        return const HTType('ModifierKey');
       case 'index':
         return (instance as ModifierKey).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ModifierKey).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ModifierKey).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -91,9 +93,10 @@ class RawKeyEventAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawKeyEvent.fromMessage':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEvent.fromMessage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawKeyEvent.fromMessage(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -107,7 +110,7 @@ extension RawKeyEventBinding on RawKeyEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEvent');
+        return const HTType('RawKeyEvent');
       case 'character':
         return character;
       case 'data':
@@ -125,20 +128,24 @@ extension RawKeyEventBinding on RawKeyEvent {
       case 'logicalKey':
         return logicalKey;
       case 'isKeyPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isKeyPressed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isKeyPressed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -151,9 +158,12 @@ class RawKeyDownEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RawKeyDownEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => RawKeyDownEvent(
-            data: namedArgs['data'], character: namedArgs.containsKey('character') ? namedArgs['character'] : null);
+            data: namedArgs['data'],
+            character: namedArgs.containsKey('character')
+                ? namedArgs['character']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -167,7 +177,7 @@ extension RawKeyDownEventBinding on RawKeyDownEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyDownEvent');
+        return const HTType('RawKeyDownEvent');
       case 'character':
         return character;
       case 'data':
@@ -185,20 +195,24 @@ extension RawKeyDownEventBinding on RawKeyDownEvent {
       case 'logicalKey':
         return logicalKey;
       case 'isKeyPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isKeyPressed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isKeyPressed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -211,9 +225,12 @@ class RawKeyUpEventAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RawKeyUpEvent':
         return ({positionalArgs, namedArgs, typeArgs}) => RawKeyUpEvent(
-            data: namedArgs['data'], character: namedArgs.containsKey('character') ? namedArgs['character'] : null);
+            data: namedArgs['data'],
+            character: namedArgs.containsKey('character')
+                ? namedArgs['character']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -227,7 +244,7 @@ extension RawKeyUpEventBinding on RawKeyUpEvent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyUpEvent');
+        return const HTType('RawKeyUpEvent');
       case 'character':
         return character;
       case 'data':
@@ -245,20 +262,24 @@ extension RawKeyUpEventBinding on RawKeyUpEvent {
       case 'logicalKey':
         return logicalKey;
       case 'isKeyPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isKeyPressed(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isKeyPressed(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -272,7 +293,7 @@ class RawKeyboardAutoBinding extends HTExternalClass {
       case 'RawKeyboard.instance':
         return RawKeyboard.instance;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard_android.g.dart b/lib/bindings/flutter/services/raw_keyboard_android.g.dart
index fd45c41..23d6422 100644
--- a/lib/bindings/flutter/services/raw_keyboard_android.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard_android.g.dart
@@ -8,18 +8,38 @@ class RawKeyEventDataAndroidAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawKeyEventDataAndroid':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEventDataAndroid(
-            flags: namedArgs.containsKey('flags') ? namedArgs['flags'] : 0,
-            codePoint: namedArgs.containsKey('codePoint') ? namedArgs['codePoint'] : 0,
-            plainCodePoint: namedArgs.containsKey('plainCodePoint') ? namedArgs['plainCodePoint'] : 0,
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
-            scanCode: namedArgs.containsKey('scanCode') ? namedArgs['scanCode'] : 0,
-            metaState: namedArgs.containsKey('metaState') ? namedArgs['metaState'] : 0,
-            eventSource: namedArgs.containsKey('eventSource') ? namedArgs['eventSource'] : 0,
-            vendorId: namedArgs.containsKey('vendorId') ? namedArgs['vendorId'] : 0,
-            productId: namedArgs.containsKey('productId') ? namedArgs['productId'] : 0,
-            deviceId: namedArgs.containsKey('deviceId') ? namedArgs['deviceId'] : 0,
-            repeatCount: namedArgs.containsKey('repeatCount') ? namedArgs['repeatCount'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawKeyEventDataAndroid(
+                flags: namedArgs.containsKey('flags') ? namedArgs['flags'] : 0,
+                codePoint: namedArgs.containsKey('codePoint')
+                    ? namedArgs['codePoint']
+                    : 0,
+                plainCodePoint: namedArgs.containsKey('plainCodePoint')
+                    ? namedArgs['plainCodePoint']
+                    : 0,
+                keyCode:
+                    namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
+                scanCode: namedArgs.containsKey('scanCode')
+                    ? namedArgs['scanCode']
+                    : 0,
+                metaState: namedArgs.containsKey('metaState')
+                    ? namedArgs['metaState']
+                    : 0,
+                eventSource: namedArgs.containsKey('eventSource')
+                    ? namedArgs['eventSource']
+                    : 0,
+                vendorId: namedArgs.containsKey('vendorId')
+                    ? namedArgs['vendorId']
+                    : 0,
+                productId: namedArgs.containsKey('productId')
+                    ? namedArgs['productId']
+                    : 0,
+                deviceId: namedArgs.containsKey('deviceId')
+                    ? namedArgs['deviceId']
+                    : 0,
+                repeatCount: namedArgs.containsKey('repeatCount')
+                    ? namedArgs['repeatCount']
+                    : 0);
       case 'RawKeyEventDataAndroid.modifierNone':
         return RawKeyEventDataAndroid.modifierNone;
       case 'RawKeyEventDataAndroid.modifierAlt':
@@ -57,7 +77,7 @@ class RawKeyEventDataAndroidAutoBinding extends HTExternalClass {
       case 'RawKeyEventDataAndroid.modifierScrollLock':
         return RawKeyEventDataAndroid.modifierScrollLock;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,7 +91,7 @@ extension RawKeyEventDataAndroidBinding on RawKeyEventDataAndroid {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEventDataAndroid');
+        return const HTType('RawKeyEventDataAndroid');
       case 'flags':
         return flags;
       case 'codePoint':
@@ -111,14 +131,18 @@ extension RawKeyEventDataAndroidBinding on RawKeyEventDataAndroid {
       case 'modifiersPressed':
         return modifiersPressed;
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard_fuchsia.g.dart b/lib/bindings/flutter/services/raw_keyboard_fuchsia.g.dart
index 805d5eb..eebfc9d 100644
--- a/lib/bindings/flutter/services/raw_keyboard_fuchsia.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard_fuchsia.g.dart
@@ -8,10 +8,17 @@ class RawKeyEventDataFuchsiaAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawKeyEventDataFuchsia':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEventDataFuchsia(
-            hidUsage: namedArgs.containsKey('hidUsage') ? namedArgs['hidUsage'] : 0,
-            codePoint: namedArgs.containsKey('codePoint') ? namedArgs['codePoint'] : 0,
-            modifiers: namedArgs.containsKey('modifiers') ? namedArgs['modifiers'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawKeyEventDataFuchsia(
+                hidUsage: namedArgs.containsKey('hidUsage')
+                    ? namedArgs['hidUsage']
+                    : 0,
+                codePoint: namedArgs.containsKey('codePoint')
+                    ? namedArgs['codePoint']
+                    : 0,
+                modifiers: namedArgs.containsKey('modifiers')
+                    ? namedArgs['modifiers']
+                    : 0);
       case 'RawKeyEventDataFuchsia.modifierNone':
         return RawKeyEventDataFuchsia.modifierNone;
       case 'RawKeyEventDataFuchsia.modifierCapsLock':
@@ -41,7 +48,7 @@ class RawKeyEventDataFuchsiaAutoBinding extends HTExternalClass {
       case 'RawKeyEventDataFuchsia.modifierMeta':
         return RawKeyEventDataFuchsia.modifierMeta;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -55,7 +62,7 @@ extension RawKeyEventDataFuchsiaBinding on RawKeyEventDataFuchsia {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEventDataFuchsia');
+        return const HTType('RawKeyEventDataFuchsia');
       case 'hidUsage':
         return hidUsage;
       case 'codePoint':
@@ -79,14 +86,18 @@ extension RawKeyEventDataFuchsiaBinding on RawKeyEventDataFuchsia {
       case 'modifiersPressed':
         return modifiersPressed;
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard_ios.g.dart b/lib/bindings/flutter/services/raw_keyboard_ios.g.dart
index ca35477..cfd8e1c 100644
--- a/lib/bindings/flutter/services/raw_keyboard_ios.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard_ios.g.dart
@@ -9,11 +9,18 @@ class RawKeyEventDataIosAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RawKeyEventDataIos':
         return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEventDataIos(
-            characters: namedArgs.containsKey('characters') ? namedArgs['characters'] : '',
+            characters: namedArgs.containsKey('characters')
+                ? namedArgs['characters']
+                : '',
             charactersIgnoringModifiers:
-                namedArgs.containsKey('charactersIgnoringModifiers') ? namedArgs['charactersIgnoringModifiers'] : '',
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
-            modifiers: namedArgs.containsKey('modifiers') ? namedArgs['modifiers'] : 0);
+                namedArgs.containsKey('charactersIgnoringModifiers')
+                    ? namedArgs['charactersIgnoringModifiers']
+                    : '',
+            keyCode:
+                namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
+            modifiers: namedArgs.containsKey('modifiers')
+                ? namedArgs['modifiers']
+                : 0);
       case 'RawKeyEventDataIos.modifierCapsLock':
         return RawKeyEventDataIos.modifierCapsLock;
       case 'RawKeyEventDataIos.modifierShift':
@@ -49,7 +56,7 @@ class RawKeyEventDataIosAutoBinding extends HTExternalClass {
       case 'RawKeyEventDataIos.deviceIndependentMask':
         return RawKeyEventDataIos.deviceIndependentMask;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,7 +70,7 @@ extension RawKeyEventDataIosBinding on RawKeyEventDataIos {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEventDataIos');
+        return const HTType('RawKeyEventDataIos');
       case 'characters':
         return characters;
       case 'charactersIgnoringModifiers':
@@ -89,14 +96,18 @@ extension RawKeyEventDataIosBinding on RawKeyEventDataIos {
       case 'modifiersPressed':
         return modifiersPressed;
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard_linux.g.dart b/lib/bindings/flutter/services/raw_keyboard_linux.g.dart
index b90a221..1b0cc36 100644
--- a/lib/bindings/flutter/services/raw_keyboard_linux.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard_linux.g.dart
@@ -10,13 +10,18 @@ class RawKeyEventDataLinuxAutoBinding extends HTExternalClass {
       case 'RawKeyEventDataLinux':
         return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEventDataLinux(
             keyHelper: namedArgs['keyHelper'],
-            unicodeScalarValues: namedArgs.containsKey('unicodeScalarValues') ? namedArgs['unicodeScalarValues'] : 0,
-            scanCode: namedArgs.containsKey('scanCode') ? namedArgs['scanCode'] : 0,
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
-            modifiers: namedArgs.containsKey('modifiers') ? namedArgs['modifiers'] : 0,
+            unicodeScalarValues: namedArgs.containsKey('unicodeScalarValues')
+                ? namedArgs['unicodeScalarValues']
+                : 0,
+            scanCode:
+                namedArgs.containsKey('scanCode') ? namedArgs['scanCode'] : 0,
+            keyCode:
+                namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
+            modifiers:
+                namedArgs.containsKey('modifiers') ? namedArgs['modifiers'] : 0,
             isDown: namedArgs['isDown']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +35,7 @@ extension RawKeyEventDataLinuxBinding on RawKeyEventDataLinux {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEventDataLinux');
+        return const HTType('RawKeyEventDataLinux');
       case 'keyHelper':
         return keyHelper;
       case 'unicodeScalarValues':
@@ -60,14 +65,18 @@ extension RawKeyEventDataLinuxBinding on RawKeyEventDataLinux {
       case 'modifiersPressed':
         return modifiersPressed;
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,9 +88,10 @@ class KeyHelperAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'KeyHelper':
-        return ({positionalArgs, namedArgs, typeArgs}) => KeyHelper(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            KeyHelper(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -95,20 +105,28 @@ extension KeyHelperBinding on KeyHelper {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('KeyHelper');
+        return const HTType('KeyHelper');
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0], positionalArgs[1],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any,
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : null,
-            isDown: namedArgs.containsKey('isDown') ? namedArgs['isDown'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0], positionalArgs[1],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any,
+            keyCode:
+                namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : null,
+            isDown:
+                namedArgs.containsKey('isDown') ? namedArgs['isDown'] : null);
       case 'numpadKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => numpadKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            numpadKey(positionalArgs[0]);
       case 'logicalKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => logicalKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            logicalKey(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -134,7 +152,7 @@ class GLFWKeyHelperAutoBinding extends HTExternalClass {
       case 'GLFWKeyHelper.modifierNumericPad':
         return GLFWKeyHelper.modifierNumericPad;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -148,20 +166,28 @@ extension GLFWKeyHelperBinding on GLFWKeyHelper {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GLFWKeyHelper');
+        return const HTType('GLFWKeyHelper');
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0], positionalArgs[1],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any,
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : null,
-            isDown: namedArgs.containsKey('isDown') ? namedArgs['isDown'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0], positionalArgs[1],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any,
+            keyCode:
+                namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : null,
+            isDown:
+                namedArgs.containsKey('isDown') ? namedArgs['isDown'] : null);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'numpadKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => numpadKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            numpadKey(positionalArgs[0]);
       case 'logicalKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => logicalKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            logicalKey(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -187,7 +213,7 @@ class GtkKeyHelperAutoBinding extends HTExternalClass {
       case 'GtkKeyHelper.modifierMeta':
         return GtkKeyHelper.modifierMeta;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -201,20 +227,28 @@ extension GtkKeyHelperBinding on GtkKeyHelper {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GtkKeyHelper');
+        return const HTType('GtkKeyHelper');
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0], positionalArgs[1],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any,
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : null,
-            isDown: namedArgs.containsKey('isDown') ? namedArgs['isDown'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0], positionalArgs[1],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any,
+            keyCode:
+                namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : null,
+            isDown:
+                namedArgs.containsKey('isDown') ? namedArgs['isDown'] : null);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'numpadKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => numpadKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            numpadKey(positionalArgs[0]);
       case 'logicalKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => logicalKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            logicalKey(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard_macos.g.dart b/lib/bindings/flutter/services/raw_keyboard_macos.g.dart
index 73f62af..c7d05c7 100644
--- a/lib/bindings/flutter/services/raw_keyboard_macos.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard_macos.g.dart
@@ -9,11 +9,18 @@ class RawKeyEventDataMacOsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RawKeyEventDataMacOs':
         return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEventDataMacOs(
-            characters: namedArgs.containsKey('characters') ? namedArgs['characters'] : '',
+            characters: namedArgs.containsKey('characters')
+                ? namedArgs['characters']
+                : '',
             charactersIgnoringModifiers:
-                namedArgs.containsKey('charactersIgnoringModifiers') ? namedArgs['charactersIgnoringModifiers'] : '',
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
-            modifiers: namedArgs.containsKey('modifiers') ? namedArgs['modifiers'] : 0);
+                namedArgs.containsKey('charactersIgnoringModifiers')
+                    ? namedArgs['charactersIgnoringModifiers']
+                    : '',
+            keyCode:
+                namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
+            modifiers: namedArgs.containsKey('modifiers')
+                ? namedArgs['modifiers']
+                : 0);
       case 'RawKeyEventDataMacOs.modifierCapsLock':
         return RawKeyEventDataMacOs.modifierCapsLock;
       case 'RawKeyEventDataMacOs.modifierShift':
@@ -49,7 +56,7 @@ class RawKeyEventDataMacOsAutoBinding extends HTExternalClass {
       case 'RawKeyEventDataMacOs.deviceIndependentMask':
         return RawKeyEventDataMacOs.deviceIndependentMask;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,7 +70,7 @@ extension RawKeyEventDataMacOsBinding on RawKeyEventDataMacOs {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEventDataMacOs');
+        return const HTType('RawKeyEventDataMacOs');
       case 'characters':
         return characters;
       case 'charactersIgnoringModifiers':
@@ -89,14 +96,18 @@ extension RawKeyEventDataMacOsBinding on RawKeyEventDataMacOs {
       case 'modifiersPressed':
         return modifiersPressed;
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard_web.g.dart b/lib/bindings/flutter/services/raw_keyboard_web.g.dart
index 794e562..aa67e13 100644
--- a/lib/bindings/flutter/services/raw_keyboard_web.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard_web.g.dart
@@ -11,7 +11,9 @@ class RawKeyEventDataWebAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEventDataWeb(
             code: namedArgs['code'],
             key: namedArgs['key'],
-            metaState: namedArgs.containsKey('metaState') ? namedArgs['metaState'] : modifierNone);
+            metaState: namedArgs.containsKey('metaState')
+                ? namedArgs['metaState']
+                : modifierNone);
       case 'RawKeyEventDataWeb.modifierNone':
         return RawKeyEventDataWeb.modifierNone;
       case 'RawKeyEventDataWeb.modifierShift':
@@ -29,7 +31,7 @@ class RawKeyEventDataWebAutoBinding extends HTExternalClass {
       case 'RawKeyEventDataWeb.modifierScrollLock':
         return RawKeyEventDataWeb.modifierScrollLock;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -45,7 +47,7 @@ extension RawKeyEventDataWebBinding on RawKeyEventDataWeb {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEventDataWeb');
+        return const HTType('RawKeyEventDataWeb');
       case 'code':
         return code;
       case 'key':
@@ -69,14 +71,18 @@ extension RawKeyEventDataWebBinding on RawKeyEventDataWeb {
       case 'modifiersPressed':
         return modifiersPressed;
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/raw_keyboard_windows.g.dart b/lib/bindings/flutter/services/raw_keyboard_windows.g.dart
index 8035026..ce864de 100644
--- a/lib/bindings/flutter/services/raw_keyboard_windows.g.dart
+++ b/lib/bindings/flutter/services/raw_keyboard_windows.g.dart
@@ -8,11 +8,19 @@ class RawKeyEventDataWindowsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawKeyEventDataWindows':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawKeyEventDataWindows(
-            keyCode: namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
-            scanCode: namedArgs.containsKey('scanCode') ? namedArgs['scanCode'] : 0,
-            characterCodePoint: namedArgs.containsKey('characterCodePoint') ? namedArgs['characterCodePoint'] : 0,
-            modifiers: namedArgs.containsKey('modifiers') ? namedArgs['modifiers'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawKeyEventDataWindows(
+                keyCode:
+                    namedArgs.containsKey('keyCode') ? namedArgs['keyCode'] : 0,
+                scanCode: namedArgs.containsKey('scanCode')
+                    ? namedArgs['scanCode']
+                    : 0,
+                characterCodePoint: namedArgs.containsKey('characterCodePoint')
+                    ? namedArgs['characterCodePoint']
+                    : 0,
+                modifiers: namedArgs.containsKey('modifiers')
+                    ? namedArgs['modifiers']
+                    : 0);
       case 'RawKeyEventDataWindows.modifierShift':
         return RawKeyEventDataWindows.modifierShift;
       case 'RawKeyEventDataWindows.modifierLeftShift':
@@ -42,7 +50,7 @@ class RawKeyEventDataWindowsAutoBinding extends HTExternalClass {
       case 'RawKeyEventDataWindows.modifierScrollLock':
         return RawKeyEventDataWindows.modifierScrollLock;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -56,7 +64,7 @@ extension RawKeyEventDataWindowsBinding on RawKeyEventDataWindows {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyEventDataWindows');
+        return const HTType('RawKeyEventDataWindows');
       case 'keyCode':
         return keyCode;
       case 'scanCode':
@@ -82,12 +90,16 @@ extension RawKeyEventDataWindowsBinding on RawKeyEventDataWindows {
       case 'modifiersPressed':
         return modifiersPressed;
       case 'isModifierPressed':
-        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(positionalArgs[0],
-            side: namedArgs.containsKey('side') ? namedArgs['side'] : KeyboardSide.any);
+        return ({positionalArgs, namedArgs, typeArgs}) => isModifierPressed(
+            positionalArgs[0],
+            side: namedArgs.containsKey('side')
+                ? namedArgs['side']
+                : KeyboardSide.any);
       case 'getModifierSide':
-        return ({positionalArgs, namedArgs, typeArgs}) => getModifierSide(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getModifierSide(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/restoration.g.dart b/lib/bindings/flutter/services/restoration.g.dart
index 67f95b6..d8f94dc 100644
--- a/lib/bindings/flutter/services/restoration.g.dart
+++ b/lib/bindings/flutter/services/restoration.g.dart
@@ -10,7 +10,7 @@ class RestorationManagerAutoBinding extends HTExternalClass {
       case 'RestorationManager':
         return ({positionalArgs, namedArgs, typeArgs}) => RestorationManager();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,7 +21,8 @@ class RestorationManagerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -30,7 +31,7 @@ extension RestorationManagerBinding on RestorationManager {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorationManager');
+        return const HTType('RestorationManager');
       case 'rootBucket':
         return rootBucket;
       case 'isReplacing':
@@ -38,13 +39,15 @@ extension RestorationManagerBinding on RestorationManager {
       case 'flushData':
         return ({positionalArgs, namedArgs, typeArgs}) => flushData();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -57,17 +60,21 @@ class RestorationBucketAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RestorationBucket.empty':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RestorationBucket.empty(restorationId: namedArgs['restorationId'], debugOwner: namedArgs['debugOwner']);
+            RestorationBucket.empty(
+                restorationId: namedArgs['restorationId'],
+                debugOwner: namedArgs['debugOwner']);
       case 'RestorationBucket.root':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RestorationBucket.root(manager: namedArgs['manager'], rawData: namedArgs['rawData']);
+            RestorationBucket.root(
+                manager: namedArgs['manager'], rawData: namedArgs['rawData']);
       case 'RestorationBucket.child':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorationBucket.child(
-            restorationId: namedArgs['restorationId'],
-            parent: namedArgs['parent'],
-            debugOwner: namedArgs['debugOwner']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorationBucket.child(
+                restorationId: namedArgs['restorationId'],
+                parent: namedArgs['parent'],
+                debugOwner: namedArgs['debugOwner']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -81,7 +88,7 @@ extension RestorationBucketBinding on RestorationBucket {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorationBucket');
+        return const HTType('RestorationBucket');
       case 'debugOwner':
         return debugOwner;
       case 'isReplacing':
@@ -89,26 +96,35 @@ extension RestorationBucketBinding on RestorationBucket {
       case 'restorationId':
         return restorationId;
       case 'read':
-        return ({positionalArgs, namedArgs, typeArgs}) => read(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            read(positionalArgs[0]);
       case 'write':
-        return ({positionalArgs, namedArgs, typeArgs}) => write(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            write(positionalArgs[0], positionalArgs[1]);
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'contains':
-        return ({positionalArgs, namedArgs, typeArgs}) => contains(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            contains(positionalArgs[0]);
       case 'claimChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => claimChild(positionalArgs[0],
-            debugOwner: namedArgs.containsKey('debugOwner') ? namedArgs['debugOwner'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => claimChild(
+            positionalArgs[0],
+            debugOwner: namedArgs.containsKey('debugOwner')
+                ? namedArgs['debugOwner']
+                : null);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'rename':
-        return ({positionalArgs, namedArgs, typeArgs}) => rename(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            rename(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/system_channels.g.dart b/lib/bindings/flutter/services/system_channels.g.dart
index 4beb860..572ed55 100644
--- a/lib/bindings/flutter/services/system_channels.g.dart
+++ b/lib/bindings/flutter/services/system_channels.g.dart
@@ -32,7 +32,7 @@ class SystemChannelsAutoBinding extends HTExternalClass {
       case 'SystemChannels.deferredComponent':
         return SystemChannels.deferredComponent;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/system_chrome.g.dart b/lib/bindings/flutter/services/system_chrome.g.dart
index e3430a1..faa1cc6 100644
--- a/lib/bindings/flutter/services/system_chrome.g.dart
+++ b/lib/bindings/flutter/services/system_chrome.g.dart
@@ -18,7 +18,7 @@ class DeviceOrientationAutoBinding extends HTExternalClass {
       case 'DeviceOrientation.landscapeRight':
         return DeviceOrientation.landscapeRight;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class DeviceOrientationAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DeviceOrientation');
+        return const HTType('DeviceOrientation');
       case 'index':
         return (instance as DeviceOrientation).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DeviceOrientation).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DeviceOrientation).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,7 +51,7 @@ class SystemUiOverlayAutoBinding extends HTExternalClass {
       case 'SystemUiOverlay.bottom':
         return SystemUiOverlay.bottom;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -58,29 +59,35 @@ class SystemUiOverlayAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SystemUiOverlay');
+        return const HTType('SystemUiOverlay');
       case 'index':
         return (instance as SystemUiOverlay).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SystemUiOverlay).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SystemUiOverlay).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class ApplicationSwitcherDescriptionAutoBinding extends HTExternalClass {
-  ApplicationSwitcherDescriptionAutoBinding() : super('ApplicationSwitcherDescription');
+  ApplicationSwitcherDescriptionAutoBinding()
+      : super('ApplicationSwitcherDescription');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ApplicationSwitcherDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => ApplicationSwitcherDescription(
-            label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
-            primaryColor: namedArgs.containsKey('primaryColor') ? namedArgs['primaryColor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ApplicationSwitcherDescription(
+                label:
+                    namedArgs.containsKey('label') ? namedArgs['label'] : null,
+                primaryColor: namedArgs.containsKey('primaryColor')
+                    ? namedArgs['primaryColor']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -90,17 +97,18 @@ class ApplicationSwitcherDescriptionAutoBinding extends HTExternalClass {
   }
 }
 
-extension ApplicationSwitcherDescriptionBinding on ApplicationSwitcherDescription {
+extension ApplicationSwitcherDescriptionBinding
+    on ApplicationSwitcherDescription {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ApplicationSwitcherDescription');
+        return const HTType('ApplicationSwitcherDescription');
       case 'label':
         return label;
       case 'primaryColor':
         return primaryColor;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -114,23 +122,33 @@ class SystemUiOverlayStyleAutoBinding extends HTExternalClass {
       case 'SystemUiOverlayStyle':
         return ({positionalArgs, namedArgs, typeArgs}) => SystemUiOverlayStyle(
             systemNavigationBarColor:
-                namedArgs.containsKey('systemNavigationBarColor') ? namedArgs['systemNavigationBarColor'] : null,
-            systemNavigationBarDividerColor: namedArgs.containsKey('systemNavigationBarDividerColor')
-                ? namedArgs['systemNavigationBarDividerColor']
+                namedArgs.containsKey('systemNavigationBarColor')
+                    ? namedArgs['systemNavigationBarColor']
+                    : null,
+            systemNavigationBarDividerColor:
+                namedArgs.containsKey('systemNavigationBarDividerColor')
+                    ? namedArgs['systemNavigationBarDividerColor']
+                    : null,
+            systemNavigationBarIconBrightness:
+                namedArgs.containsKey('systemNavigationBarIconBrightness')
+                    ? namedArgs['systemNavigationBarIconBrightness']
+                    : null,
+            statusBarColor: namedArgs.containsKey('statusBarColor')
+                ? namedArgs['statusBarColor']
                 : null,
-            systemNavigationBarIconBrightness: namedArgs.containsKey('systemNavigationBarIconBrightness')
-                ? namedArgs['systemNavigationBarIconBrightness']
+            statusBarBrightness: namedArgs.containsKey('statusBarBrightness')
+                ? namedArgs['statusBarBrightness']
                 : null,
-            statusBarColor: namedArgs.containsKey('statusBarColor') ? namedArgs['statusBarColor'] : null,
-            statusBarBrightness: namedArgs.containsKey('statusBarBrightness') ? namedArgs['statusBarBrightness'] : null,
             statusBarIconBrightness:
-                namedArgs.containsKey('statusBarIconBrightness') ? namedArgs['statusBarIconBrightness'] : null);
+                namedArgs.containsKey('statusBarIconBrightness')
+                    ? namedArgs['statusBarIconBrightness']
+                    : null);
       case 'SystemUiOverlayStyle.light':
         return SystemUiOverlayStyle.light;
       case 'SystemUiOverlayStyle.dark':
         return SystemUiOverlayStyle.dark;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -144,7 +162,7 @@ extension SystemUiOverlayStyleBinding on SystemUiOverlayStyle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SystemUiOverlayStyle');
+        return const HTType('SystemUiOverlayStyle');
       case 'systemNavigationBarColor':
         return systemNavigationBarColor;
       case 'systemNavigationBarDividerColor':
@@ -164,19 +182,29 @@ extension SystemUiOverlayStyleBinding on SystemUiOverlayStyle {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             systemNavigationBarColor:
-                namedArgs.containsKey('systemNavigationBarColor') ? namedArgs['systemNavigationBarColor'] : null,
-            systemNavigationBarDividerColor: namedArgs.containsKey('systemNavigationBarDividerColor')
-                ? namedArgs['systemNavigationBarDividerColor']
+                namedArgs.containsKey('systemNavigationBarColor')
+                    ? namedArgs['systemNavigationBarColor']
+                    : null,
+            systemNavigationBarDividerColor:
+                namedArgs.containsKey('systemNavigationBarDividerColor')
+                    ? namedArgs['systemNavigationBarDividerColor']
+                    : null,
+            statusBarColor: namedArgs.containsKey('statusBarColor')
+                ? namedArgs['statusBarColor']
+                : null,
+            statusBarBrightness: namedArgs.containsKey('statusBarBrightness')
+                ? namedArgs['statusBarBrightness']
                 : null,
-            statusBarColor: namedArgs.containsKey('statusBarColor') ? namedArgs['statusBarColor'] : null,
-            statusBarBrightness: namedArgs.containsKey('statusBarBrightness') ? namedArgs['statusBarBrightness'] : null,
             statusBarIconBrightness:
-                namedArgs.containsKey('statusBarIconBrightness') ? namedArgs['statusBarIconBrightness'] : null,
-            systemNavigationBarIconBrightness: namedArgs.containsKey('systemNavigationBarIconBrightness')
-                ? namedArgs['systemNavigationBarIconBrightness']
-                : null);
+                namedArgs.containsKey('statusBarIconBrightness')
+                    ? namedArgs['statusBarIconBrightness']
+                    : null,
+            systemNavigationBarIconBrightness:
+                namedArgs.containsKey('systemNavigationBarIconBrightness')
+                    ? namedArgs['systemNavigationBarIconBrightness']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -189,19 +217,23 @@ class SystemChromeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SystemChrome.setPreferredOrientations':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            SystemChrome.setPreferredOrientations(List<DeviceOrientation>.from(positionalArgs[0]));
+            SystemChrome.setPreferredOrientations(
+                List<DeviceOrientation>.from(positionalArgs[0]));
       case 'SystemChrome.setApplicationSwitcherDescription':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             SystemChrome.setApplicationSwitcherDescription(positionalArgs[0]);
       case 'SystemChrome.setEnabledSystemUIOverlays':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            SystemChrome.setEnabledSystemUIOverlays(List<SystemUiOverlay>.from(positionalArgs[0]));
+            SystemChrome.setEnabledSystemUIOverlays(
+                List<SystemUiOverlay>.from(positionalArgs[0]));
       case 'SystemChrome.restoreSystemUIOverlays':
-        return ({positionalArgs, namedArgs, typeArgs}) => SystemChrome.restoreSystemUIOverlays();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SystemChrome.restoreSystemUIOverlays();
       case 'SystemChrome.setSystemUIOverlayStyle':
-        return ({positionalArgs, namedArgs, typeArgs}) => SystemChrome.setSystemUIOverlayStyle(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SystemChrome.setSystemUIOverlayStyle(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/system_navigator.g.dart b/lib/bindings/flutter/services/system_navigator.g.dart
index 8feea83..9772223 100644
--- a/lib/bindings/flutter/services/system_navigator.g.dart
+++ b/lib/bindings/flutter/services/system_navigator.g.dart
@@ -1,7 +1,6 @@
 import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/services.dart';
 
-
 class SystemNavigatorAutoBinding extends HTExternalClass {
   SystemNavigatorAutoBinding() : super('SystemNavigator');
 
@@ -9,19 +8,29 @@ class SystemNavigatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SystemNavigator.pop':
-        return ({positionalArgs, namedArgs, typeArgs}) => SystemNavigator.pop(animated : namedArgs.containsKey('animated') ? namedArgs['animated'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => SystemNavigator.pop(
+            animated: namedArgs.containsKey('animated')
+                ? namedArgs['animated']
+                : null);
       case 'SystemNavigator.routeInformationUpdated':
-        return ({positionalArgs, namedArgs, typeArgs}) => SystemNavigator.routeInformationUpdated(location : namedArgs.containsKey('location') ? namedArgs['location'] : null, state : namedArgs.containsKey('state') ? namedArgs['state'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SystemNavigator.routeInformationUpdated(
+                location: namedArgs.containsKey('location')
+                    ? namedArgs['location']
+                    : null,
+                state:
+                    namedArgs.containsKey('state') ? namedArgs['state'] : null);
       case 'SystemNavigator.routeUpdated':
-        return ({positionalArgs, namedArgs, typeArgs}) => SystemNavigator.routeUpdated(routeName : namedArgs.containsKey('routeName') ? namedArgs['routeName'] : null, previousRouteName : namedArgs.containsKey('previousRouteName') ? namedArgs['previousRouteName'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SystemNavigator.routeUpdated(
+                routeName: namedArgs.containsKey('routeName')
+                    ? namedArgs['routeName']
+                    : null,
+                previousRouteName: namedArgs.containsKey('previousRouteName')
+                    ? namedArgs['previousRouteName']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
-
-
-
-
 }
-
-
diff --git a/lib/bindings/flutter/services/system_sound.g.dart b/lib/bindings/flutter/services/system_sound.g.dart
index 5255e9a..73d5fcc 100644
--- a/lib/bindings/flutter/services/system_sound.g.dart
+++ b/lib/bindings/flutter/services/system_sound.g.dart
@@ -14,7 +14,7 @@ class SystemSoundTypeAutoBinding extends HTExternalClass {
       case 'SystemSoundType.alert':
         return SystemSoundType.alert;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class SystemSoundTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SystemSoundType');
+        return const HTType('SystemSoundType');
       case 'index':
         return (instance as SystemSoundType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SystemSoundType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SystemSoundType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -40,9 +41,10 @@ class SystemSoundAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SystemSound.play':
-        return ({positionalArgs, namedArgs, typeArgs}) => SystemSound.play(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SystemSound.play(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/text_editing.g.dart b/lib/bindings/flutter/services/text_editing.g.dart
index c5911e0..e4ef120 100644
--- a/lib/bindings/flutter/services/text_editing.g.dart
+++ b/lib/bindings/flutter/services/text_editing.g.dart
@@ -12,16 +12,24 @@ class TextSelectionAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => TextSelection(
             baseOffset: namedArgs['baseOffset'],
             extentOffset: namedArgs['extentOffset'],
-            affinity: namedArgs.containsKey('affinity') ? namedArgs['affinity'] : TextAffinity.downstream,
-            isDirectional: namedArgs.containsKey('isDirectional') ? namedArgs['isDirectional'] : false);
+            affinity: namedArgs.containsKey('affinity')
+                ? namedArgs['affinity']
+                : TextAffinity.downstream,
+            isDirectional: namedArgs.containsKey('isDirectional')
+                ? namedArgs['isDirectional']
+                : false);
       case 'TextSelection.collapsed':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelection.collapsed(
-            offset: namedArgs['offset'],
-            affinity: namedArgs.containsKey('affinity') ? namedArgs['affinity'] : TextAffinity.downstream);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelection.collapsed(
+                offset: namedArgs['offset'],
+                affinity: namedArgs.containsKey('affinity')
+                    ? namedArgs['affinity']
+                    : TextAffinity.downstream);
       case 'TextSelection.fromPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelection.fromPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelection.fromPosition(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +43,7 @@ extension TextSelectionBinding on TextSelection {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelection');
+        return const HTType('TextSelection');
       case 'baseOffset':
         return baseOffset;
       case 'extentOffset':
@@ -64,18 +72,29 @@ extension TextSelectionBinding on TextSelection {
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            baseOffset: namedArgs.containsKey('baseOffset') ? namedArgs['baseOffset'] : null,
-            extentOffset: namedArgs.containsKey('extentOffset') ? namedArgs['extentOffset'] : null,
-            affinity: namedArgs.containsKey('affinity') ? namedArgs['affinity'] : null,
-            isDirectional: namedArgs.containsKey('isDirectional') ? namedArgs['isDirectional'] : null);
+            baseOffset: namedArgs.containsKey('baseOffset')
+                ? namedArgs['baseOffset']
+                : null,
+            extentOffset: namedArgs.containsKey('extentOffset')
+                ? namedArgs['extentOffset']
+                : null,
+            affinity: namedArgs.containsKey('affinity')
+                ? namedArgs['affinity']
+                : null,
+            isDirectional: namedArgs.containsKey('isDirectional')
+                ? namedArgs['isDirectional']
+                : null);
       case 'textBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => textBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            textBefore(positionalArgs[0]);
       case 'textAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => textAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            textAfter(positionalArgs[0]);
       case 'textInside':
-        return ({positionalArgs, namedArgs, typeArgs}) => textInside(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            textInside(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/text_formatter.g.dart b/lib/bindings/flutter/services/text_formatter.g.dart
index b0ec090..e496555 100644
--- a/lib/bindings/flutter/services/text_formatter.g.dart
+++ b/lib/bindings/flutter/services/text_formatter.g.dart
@@ -16,7 +16,7 @@ class MaxLengthEnforcementAutoBinding extends HTExternalClass {
       case 'MaxLengthEnforcement.truncateAfterCompositionEnds':
         return MaxLengthEnforcement.truncateAfterCompositionEnds;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class MaxLengthEnforcementAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MaxLengthEnforcement');
+        return const HTType('MaxLengthEnforcement');
       case 'index':
         return (instance as MaxLengthEnforcement).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as MaxLengthEnforcement).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as MaxLengthEnforcement).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,42 +43,55 @@ class TextInputFormatterAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextInputFormatter.withFunction':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextInputFormatter.withFunction(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextInputFormatter.withFunction(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TextInputFormatFunction': (HTFunction function) => (oldValue, newValue) =>
-          function.call(positionalArgs: [oldValue, newValue], namedArgs: const {}) as TextEditingValue,
+      'TextInputFormatFunction': (HTFunction function) =>
+          (oldValue, newValue) => function.call(
+              positionalArgs: [oldValue, newValue],
+              namedArgs: const {}) as TextEditingValue,
     };
   }
 }
 
 class FilteringTextInputFormatterAutoBinding extends HTExternalClass {
-  FilteringTextInputFormatterAutoBinding() : super('FilteringTextInputFormatter');
+  FilteringTextInputFormatterAutoBinding()
+      : super('FilteringTextInputFormatter');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FilteringTextInputFormatter':
-        return ({positionalArgs, namedArgs, typeArgs}) => FilteringTextInputFormatter(positionalArgs[0],
-            allow: namedArgs['allow'],
-            replacementString: namedArgs.containsKey('replacementString') ? namedArgs['replacementString'] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FilteringTextInputFormatter(positionalArgs[0],
+                allow: namedArgs['allow'],
+                replacementString: namedArgs.containsKey('replacementString')
+                    ? namedArgs['replacementString']
+                    : '');
       case 'FilteringTextInputFormatter.allow':
-        return ({positionalArgs, namedArgs, typeArgs}) => FilteringTextInputFormatter.allow(positionalArgs[0],
-            replacementString: namedArgs.containsKey('replacementString') ? namedArgs['replacementString'] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FilteringTextInputFormatter.allow(positionalArgs[0],
+                replacementString: namedArgs.containsKey('replacementString')
+                    ? namedArgs['replacementString']
+                    : '');
       case 'FilteringTextInputFormatter.deny':
-        return ({positionalArgs, namedArgs, typeArgs}) => FilteringTextInputFormatter.deny(positionalArgs[0],
-            replacementString: namedArgs.containsKey('replacementString') ? namedArgs['replacementString'] : '');
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FilteringTextInputFormatter.deny(positionalArgs[0],
+                replacementString: namedArgs.containsKey('replacementString')
+                    ? namedArgs['replacementString']
+                    : '');
       case 'FilteringTextInputFormatter.singleLineFormatter':
         return FilteringTextInputFormatter.singleLineFormatter;
       case 'FilteringTextInputFormatter.digitsOnly':
         return FilteringTextInputFormatter.digitsOnly;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -91,7 +105,7 @@ extension FilteringTextInputFormatterBinding on FilteringTextInputFormatter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FilteringTextInputFormatter');
+        return const HTType('FilteringTextInputFormatter');
       case 'filterPattern':
         return filterPattern;
       case 'allow':
@@ -99,29 +113,34 @@ extension FilteringTextInputFormatterBinding on FilteringTextInputFormatter {
       case 'replacementString':
         return replacementString;
       case 'formatEditUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatEditUpdate(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatEditUpdate(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class LengthLimitingTextInputFormatterAutoBinding extends HTExternalClass {
-  LengthLimitingTextInputFormatterAutoBinding() : super('LengthLimitingTextInputFormatter');
+  LengthLimitingTextInputFormatterAutoBinding()
+      : super('LengthLimitingTextInputFormatter');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LengthLimitingTextInputFormatter':
-        return ({positionalArgs, namedArgs, typeArgs}) => LengthLimitingTextInputFormatter(positionalArgs[0],
-            maxLengthEnforcement:
-                namedArgs.containsKey('maxLengthEnforcement') ? namedArgs['maxLengthEnforcement'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LengthLimitingTextInputFormatter(positionalArgs[0],
+                maxLengthEnforcement:
+                    namedArgs.containsKey('maxLengthEnforcement')
+                        ? namedArgs['maxLengthEnforcement']
+                        : null);
       case 'LengthLimitingTextInputFormatter.getDefaultMaxLengthEnforcement':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             LengthLimitingTextInputFormatter.getDefaultMaxLengthEnforcement(
                 positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -131,19 +150,21 @@ class LengthLimitingTextInputFormatterAutoBinding extends HTExternalClass {
   }
 }
 
-extension LengthLimitingTextInputFormatterBinding on LengthLimitingTextInputFormatter {
+extension LengthLimitingTextInputFormatterBinding
+    on LengthLimitingTextInputFormatter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LengthLimitingTextInputFormatter');
+        return const HTType('LengthLimitingTextInputFormatter');
       case 'maxLength':
         return maxLength;
       case 'maxLengthEnforcement':
         return maxLengthEnforcement;
       case 'formatEditUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => formatEditUpdate(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            formatEditUpdate(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/services/text_input.g.dart b/lib/bindings/flutter/services/text_input.g.dart
index f44f05a..a85d39f 100644
--- a/lib/bindings/flutter/services/text_input.g.dart
+++ b/lib/bindings/flutter/services/text_input.g.dart
@@ -15,7 +15,7 @@ class SmartDashesTypeAutoBinding extends HTExternalClass {
       case 'SmartDashesType.enabled':
         return SmartDashesType.enabled;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,13 +23,14 @@ class SmartDashesTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SmartDashesType');
+        return const HTType('SmartDashesType');
       case 'index':
         return (instance as SmartDashesType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SmartDashesType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SmartDashesType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -47,7 +48,7 @@ class SmartQuotesTypeAutoBinding extends HTExternalClass {
       case 'SmartQuotesType.enabled':
         return SmartQuotesType.enabled;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -55,13 +56,14 @@ class SmartQuotesTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SmartQuotesType');
+        return const HTType('SmartQuotesType');
       case 'index':
         return (instance as SmartQuotesType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as SmartQuotesType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as SmartQuotesType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -101,7 +103,7 @@ class TextInputActionAutoBinding extends HTExternalClass {
       case 'TextInputAction.newline':
         return TextInputAction.newline;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -109,13 +111,14 @@ class TextInputActionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextInputAction');
+        return const HTType('TextInputAction');
       case 'index':
         return (instance as TextInputAction).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextInputAction).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextInputAction).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -137,7 +140,7 @@ class TextCapitalizationAutoBinding extends HTExternalClass {
       case 'TextCapitalization.none':
         return TextCapitalization.none;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -145,13 +148,14 @@ class TextCapitalizationAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextCapitalization');
+        return const HTType('TextCapitalization');
       case 'index':
         return (instance as TextCapitalization).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextCapitalization).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextCapitalization).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -171,7 +175,7 @@ class FloatingCursorDragStateAutoBinding extends HTExternalClass {
       case 'FloatingCursorDragState.End':
         return FloatingCursorDragState.End;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -179,13 +183,14 @@ class FloatingCursorDragStateAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FloatingCursorDragState');
+        return const HTType('FloatingCursorDragState');
       case 'index':
         return (instance as FloatingCursorDragState).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FloatingCursorDragState).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FloatingCursorDragState).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -197,9 +202,14 @@ class TextInputTypeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextInputType.numberWithOptions':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextInputType.numberWithOptions(
-            signed: namedArgs.containsKey('signed') ? namedArgs['signed'] : false,
-            decimal: namedArgs.containsKey('decimal') ? namedArgs['decimal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextInputType.numberWithOptions(
+                signed: namedArgs.containsKey('signed')
+                    ? namedArgs['signed']
+                    : false,
+                decimal: namedArgs.containsKey('decimal')
+                    ? namedArgs['decimal']
+                    : false);
       case 'TextInputType.text':
         return TextInputType.text;
       case 'TextInputType.multiline':
@@ -223,7 +233,7 @@ class TextInputTypeAutoBinding extends HTExternalClass {
       case 'TextInputType.values':
         return TextInputType.values;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -237,7 +247,7 @@ extension TextInputTypeBinding on TextInputType {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextInputType');
+        return const HTType('TextInputType');
       case 'index':
         return index;
       case 'signed':
@@ -251,7 +261,7 @@ extension TextInputTypeBinding on TextInputType {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -263,24 +273,47 @@ class TextInputConfigurationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextInputConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextInputConfiguration(
-            inputType: namedArgs.containsKey('inputType') ? namedArgs['inputType'] : TextInputType.text,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            autocorrect: namedArgs.containsKey('autocorrect') ? namedArgs['autocorrect'] : true,
-            smartDashesType: namedArgs.containsKey('smartDashesType') ? namedArgs['smartDashesType'] : null,
-            smartQuotesType: namedArgs.containsKey('smartQuotesType') ? namedArgs['smartQuotesType'] : null,
-            enableSuggestions: namedArgs.containsKey('enableSuggestions') ? namedArgs['enableSuggestions'] : true,
-            actionLabel: namedArgs.containsKey('actionLabel') ? namedArgs['actionLabel'] : null,
-            inputAction: namedArgs.containsKey('inputAction') ? namedArgs['inputAction'] : TextInputAction.done,
-            keyboardAppearance:
-                namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : Brightness.light,
-            textCapitalization:
-                namedArgs.containsKey('textCapitalization') ? namedArgs['textCapitalization'] : TextCapitalization.none,
-            autofillConfiguration:
-                namedArgs.containsKey('autofillConfiguration') ? namedArgs['autofillConfiguration'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextInputConfiguration(
+                inputType: namedArgs.containsKey('inputType')
+                    ? namedArgs['inputType']
+                    : TextInputType.text,
+                readOnly: namedArgs.containsKey('readOnly')
+                    ? namedArgs['readOnly']
+                    : false,
+                obscureText: namedArgs.containsKey('obscureText')
+                    ? namedArgs['obscureText']
+                    : false,
+                autocorrect: namedArgs.containsKey('autocorrect')
+                    ? namedArgs['autocorrect']
+                    : true,
+                smartDashesType: namedArgs.containsKey('smartDashesType')
+                    ? namedArgs['smartDashesType']
+                    : null,
+                smartQuotesType: namedArgs.containsKey('smartQuotesType')
+                    ? namedArgs['smartQuotesType']
+                    : null,
+                enableSuggestions: namedArgs.containsKey('enableSuggestions')
+                    ? namedArgs['enableSuggestions']
+                    : true,
+                actionLabel: namedArgs.containsKey('actionLabel')
+                    ? namedArgs['actionLabel']
+                    : null,
+                inputAction: namedArgs.containsKey('inputAction')
+                    ? namedArgs['inputAction']
+                    : TextInputAction.done,
+                keyboardAppearance: namedArgs.containsKey('keyboardAppearance')
+                    ? namedArgs['keyboardAppearance']
+                    : Brightness.light,
+                textCapitalization: namedArgs.containsKey('textCapitalization')
+                    ? namedArgs['textCapitalization']
+                    : TextCapitalization.none,
+                autofillConfiguration:
+                    namedArgs.containsKey('autofillConfiguration')
+                        ? namedArgs['autofillConfiguration']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -294,7 +327,7 @@ extension TextInputConfigurationBinding on TextInputConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextInputConfiguration');
+        return const HTType('TextInputConfiguration');
       case 'inputType':
         return inputType;
       case 'readOnly':
@@ -322,7 +355,7 @@ extension TextInputConfigurationBinding on TextInputConfiguration {
       case 'toJson':
         return ({positionalArgs, namedArgs, typeArgs}) => toJson();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -334,10 +367,14 @@ class RawFloatingCursorPointAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawFloatingCursorPoint':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawFloatingCursorPoint(
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : null, state: namedArgs['state']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawFloatingCursorPoint(
+                offset: namedArgs.containsKey('offset')
+                    ? namedArgs['offset']
+                    : null,
+                state: namedArgs['state']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -351,13 +388,13 @@ extension RawFloatingCursorPointBinding on RawFloatingCursorPoint {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawFloatingCursorPoint');
+        return const HTType('RawFloatingCursorPoint');
       case 'offset':
         return offset;
       case 'state':
         return state;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -371,15 +408,19 @@ class TextEditingValueAutoBinding extends HTExternalClass {
       case 'TextEditingValue':
         return ({positionalArgs, namedArgs, typeArgs}) => TextEditingValue(
             text: namedArgs.containsKey('text') ? namedArgs['text'] : '',
-            selection:
-                namedArgs.containsKey('selection') ? namedArgs['selection'] : const TextSelection.collapsed(offset: -1),
-            composing: namedArgs.containsKey('composing') ? namedArgs['composing'] : TextRange.empty);
+            selection: namedArgs.containsKey('selection')
+                ? namedArgs['selection']
+                : const TextSelection.collapsed(offset: -1),
+            composing: namedArgs.containsKey('composing')
+                ? namedArgs['composing']
+                : TextRange.empty);
       case 'TextEditingValue.fromJSON':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextEditingValue.fromJSON(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextEditingValue.fromJSON(positionalArgs[0]);
       case 'TextEditingValue.empty':
         return TextEditingValue.empty;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -393,7 +434,7 @@ extension TextEditingValueBinding on TextEditingValue {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextEditingValue');
+        return const HTType('TextEditingValue');
       case 'text':
         return text;
       case 'selection':
@@ -409,12 +450,16 @@ extension TextEditingValueBinding on TextEditingValue {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             text: namedArgs.containsKey('text') ? namedArgs['text'] : null,
-            selection: namedArgs.containsKey('selection') ? namedArgs['selection'] : null,
-            composing: namedArgs.containsKey('composing') ? namedArgs['composing'] : null);
+            selection: namedArgs.containsKey('selection')
+                ? namedArgs['selection']
+                : null,
+            composing: namedArgs.containsKey('composing')
+                ? namedArgs['composing']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -426,12 +471,16 @@ class TextInputAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextInput.attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextInput.attach(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextInput.attach(positionalArgs[0], positionalArgs[1]);
       case 'TextInput.finishAutofillContext':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextInput.finishAutofillContext(
-            shouldSave: namedArgs.containsKey('shouldSave') ? namedArgs['shouldSave'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextInput.finishAutofillContext(
+                shouldSave: namedArgs.containsKey('shouldSave')
+                    ? namedArgs['shouldSave']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/actions.g.dart b/lib/bindings/flutter/widgets/actions.g.dart
index 120ef9e..c439b05 100644
--- a/lib/bindings/flutter/widgets/actions.g.dart
+++ b/lib/bindings/flutter/widgets/actions.g.dart
@@ -16,7 +16,7 @@ class ActionListenerAutoBinding extends HTExternalClass {
             action: namedArgs['action'],
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,8 +27,8 @@ class ActionListenerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -37,7 +37,7 @@ extension ActionListenerBinding on ActionListener {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ActionListener');
+        return const HTType('ActionListener');
       case 'listener':
         return listener;
       case 'action':
@@ -55,25 +55,37 @@ extension ActionListenerBinding on ActionListener {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -87,7 +99,7 @@ class ActionDispatcherAutoBinding extends HTExternalClass {
       case 'ActionDispatcher':
         return ({positionalArgs, namedArgs, typeArgs}) => ActionDispatcher();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -101,21 +113,25 @@ extension ActionDispatcherBinding on ActionDispatcher {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ActionDispatcher');
+        return const HTType('ActionDispatcher');
       case 'invokeAction':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            invokeAction(positionalArgs[0], positionalArgs[1], positionalArgs.length > 2 ? positionalArgs[2] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => invokeAction(
+            positionalArgs[0],
+            positionalArgs[1],
+            positionalArgs.length > 2 ? positionalArgs[2] : null);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -129,13 +145,16 @@ class ActionsAutoBinding extends HTExternalClass {
       case 'Actions':
         return ({positionalArgs, namedArgs, typeArgs}) => Actions(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            dispatcher: namedArgs.containsKey('dispatcher') ? namedArgs['dispatcher'] : null,
+            dispatcher: namedArgs.containsKey('dispatcher')
+                ? namedArgs['dispatcher']
+                : null,
             actions: namedArgs['actions'],
             child: namedArgs['child']);
       case 'Actions.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Actions.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Actions.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -149,7 +168,7 @@ extension ActionsBinding on Actions {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Actions');
+        return const HTType('Actions');
       case 'dispatcher':
         return dispatcher;
       case 'actions':
@@ -163,29 +182,41 @@ extension ActionsBinding on Actions {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -197,22 +228,41 @@ class FocusableActionDetectorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FocusableActionDetector':
-        return ({positionalArgs, namedArgs, typeArgs}) => FocusableActionDetector(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : true,
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : null,
-            actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
-            onShowFocusHighlight:
-                namedArgs.containsKey('onShowFocusHighlight') ? namedArgs['onShowFocusHighlight'] : null,
-            onShowHoverHighlight:
-                namedArgs.containsKey('onShowHoverHighlight') ? namedArgs['onShowHoverHighlight'] : null,
-            onFocusChange: namedArgs.containsKey('onFocusChange') ? namedArgs['onFocusChange'] : null,
-            mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : MouseCursor.defer,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FocusableActionDetector(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                enabled: namedArgs.containsKey('enabled')
+                    ? namedArgs['enabled']
+                    : true,
+                focusNode: namedArgs.containsKey('focusNode')
+                    ? namedArgs['focusNode']
+                    : null,
+                autofocus: namedArgs.containsKey('autofocus')
+                    ? namedArgs['autofocus']
+                    : false,
+                shortcuts: namedArgs.containsKey('shortcuts')
+                    ? namedArgs['shortcuts']
+                    : null,
+                actions: namedArgs.containsKey('actions')
+                    ? namedArgs['actions']
+                    : null,
+                onShowFocusHighlight:
+                    namedArgs.containsKey('onShowFocusHighlight')
+                        ? namedArgs['onShowFocusHighlight']
+                        : null,
+                onShowHoverHighlight:
+                    namedArgs.containsKey('onShowHoverHighlight')
+                        ? namedArgs['onShowHoverHighlight']
+                        : null,
+                onFocusChange: namedArgs.containsKey('onFocusChange')
+                    ? namedArgs['onFocusChange']
+                    : null,
+                mouseCursor: namedArgs.containsKey('mouseCursor')
+                    ? namedArgs['mouseCursor']
+                    : MouseCursor.defer,
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -226,7 +276,7 @@ extension FocusableActionDetectorBinding on FocusableActionDetector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusableActionDetector');
+        return const HTType('FocusableActionDetector');
       case 'enabled':
         return enabled;
       case 'focusNode':
@@ -258,25 +308,37 @@ extension FocusableActionDetectorBinding on FocusableActionDetector {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -290,7 +352,7 @@ class DoNothingIntentAutoBinding extends HTExternalClass {
       case 'DoNothingIntent':
         return ({positionalArgs, namedArgs, typeArgs}) => DoNothingIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -304,32 +366,36 @@ extension DoNothingIntentBinding on DoNothingIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DoNothingIntent');
+        return const HTType('DoNothingIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DoNothingAndStopPropagationIntentAutoBinding extends HTExternalClass {
-  DoNothingAndStopPropagationIntentAutoBinding() : super('DoNothingAndStopPropagationIntent');
+  DoNothingAndStopPropagationIntentAutoBinding()
+      : super('DoNothingAndStopPropagationIntent');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DoNothingAndStopPropagationIntent':
-        return ({positionalArgs, namedArgs, typeArgs}) => DoNothingAndStopPropagationIntent();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DoNothingAndStopPropagationIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -339,22 +405,25 @@ class DoNothingAndStopPropagationIntentAutoBinding extends HTExternalClass {
   }
 }
 
-extension DoNothingAndStopPropagationIntentBinding on DoNothingAndStopPropagationIntent {
+extension DoNothingAndStopPropagationIntentBinding
+    on DoNothingAndStopPropagationIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DoNothingAndStopPropagationIntent');
+        return const HTType('DoNothingAndStopPropagationIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -366,10 +435,12 @@ class DoNothingActionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DoNothingAction':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            DoNothingAction(consumesKey: namedArgs.containsKey('consumesKey') ? namedArgs['consumesKey'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) => DoNothingAction(
+            consumesKey: namedArgs.containsKey('consumesKey')
+                ? namedArgs['consumesKey']
+                : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -380,8 +451,8 @@ class DoNothingActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -390,30 +461,37 @@ extension DoNothingActionBinding on DoNothingAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DoNothingAction');
+        return const HTType('DoNothingAction');
       case 'intentType':
         return intentType;
       case 'consumesKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumesKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            consumesKey(positionalArgs[0]);
       case 'invoke':
-        return ({positionalArgs, namedArgs, typeArgs}) => invoke(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invoke(positionalArgs[0]);
       case 'isEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => isEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isEnabled(positionalArgs[0]);
       case 'addActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addActionListener(positionalArgs[0]);
       case 'removeActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeActionListener(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -427,7 +505,7 @@ class ActivateIntentAutoBinding extends HTExternalClass {
       case 'ActivateIntent':
         return ({positionalArgs, namedArgs, typeArgs}) => ActivateIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -441,18 +519,20 @@ extension ActivateIntentBinding on ActivateIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ActivateIntent');
+        return const HTType('ActivateIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -464,9 +544,10 @@ class ButtonActivateIntentAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ButtonActivateIntent':
-        return ({positionalArgs, namedArgs, typeArgs}) => ButtonActivateIntent();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ButtonActivateIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -480,18 +561,20 @@ extension ButtonActivateIntentBinding on ButtonActivateIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ButtonActivateIntent');
+        return const HTType('ButtonActivateIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -505,7 +588,7 @@ class SelectIntentAutoBinding extends HTExternalClass {
       case 'SelectIntent':
         return ({positionalArgs, namedArgs, typeArgs}) => SelectIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -519,18 +602,20 @@ extension SelectIntentBinding on SelectIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SelectIntent');
+        return const HTType('SelectIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -544,7 +629,7 @@ class DismissIntentAutoBinding extends HTExternalClass {
       case 'DismissIntent':
         return ({positionalArgs, namedArgs, typeArgs}) => DismissIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -558,18 +643,20 @@ extension DismissIntentBinding on DismissIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DismissIntent');
+        return const HTType('DismissIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -581,10 +668,10 @@ class PrioritizedIntentsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PrioritizedIntents':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            PrioritizedIntents(orderedIntents: List<Intent>.from(namedArgs['orderedIntents']));
+        return ({positionalArgs, namedArgs, typeArgs}) => PrioritizedIntents(
+            orderedIntents: List<Intent>.from(namedArgs['orderedIntents']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -598,20 +685,22 @@ extension PrioritizedIntentsBinding on PrioritizedIntents {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PrioritizedIntents');
+        return const HTType('PrioritizedIntents');
       case 'orderedIntents':
         return orderedIntents;
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -625,7 +714,7 @@ class PrioritizedActionAutoBinding extends HTExternalClass {
       case 'PrioritizedAction':
         return ({positionalArgs, namedArgs, typeArgs}) => PrioritizedAction();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -636,8 +725,8 @@ class PrioritizedActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -646,30 +735,37 @@ extension PrioritizedActionBinding on PrioritizedAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PrioritizedAction');
+        return const HTType('PrioritizedAction');
       case 'intentType':
         return intentType;
       case 'isEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => isEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isEnabled(positionalArgs[0]);
       case 'invoke':
-        return ({positionalArgs, namedArgs, typeArgs}) => invoke(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invoke(positionalArgs[0]);
       case 'consumesKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumesKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            consumesKey(positionalArgs[0]);
       case 'addActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addActionListener(positionalArgs[0]);
       case 'removeActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeActionListener(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/animated_cross_fade.g.dart b/lib/bindings/flutter/widgets/animated_cross_fade.g.dart
index 9deedfa..f730686 100644
--- a/lib/bindings/flutter/widgets/animated_cross_fade.g.dart
+++ b/lib/bindings/flutter/widgets/animated_cross_fade.g.dart
@@ -15,7 +15,7 @@ class CrossFadeStateAutoBinding extends HTExternalClass {
       case 'CrossFadeState.showSecond':
         return CrossFadeState.showSecond;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,13 +23,14 @@ class CrossFadeStateAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CrossFadeState');
+        return const HTType('CrossFadeState');
       case 'index':
         return (instance as CrossFadeState).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as CrossFadeState).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as CrossFadeState).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,19 +47,32 @@ class AnimatedCrossFadeAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             firstChild: namedArgs['firstChild'],
             secondChild: namedArgs['secondChild'],
-            firstCurve: namedArgs.containsKey('firstCurve') ? namedArgs['firstCurve'] : Curves.linear,
-            secondCurve: namedArgs.containsKey('secondCurve') ? namedArgs['secondCurve'] : Curves.linear,
-            sizeCurve: namedArgs.containsKey('sizeCurve') ? namedArgs['sizeCurve'] : Curves.linear,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.topCenter,
+            firstCurve: namedArgs.containsKey('firstCurve')
+                ? namedArgs['firstCurve']
+                : Curves.linear,
+            secondCurve: namedArgs.containsKey('secondCurve')
+                ? namedArgs['secondCurve']
+                : Curves.linear,
+            sizeCurve: namedArgs.containsKey('sizeCurve')
+                ? namedArgs['sizeCurve']
+                : Curves.linear,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.topCenter,
             crossFadeState: namedArgs['crossFadeState'],
             duration: namedArgs['duration'],
-            reverseDuration: namedArgs.containsKey('reverseDuration') ? namedArgs['reverseDuration'] : null,
-            layoutBuilder: namedArgs.containsKey('layoutBuilder') ? namedArgs['layoutBuilder'] : defaultLayoutBuilder);
+            reverseDuration: namedArgs.containsKey('reverseDuration')
+                ? namedArgs['reverseDuration']
+                : null,
+            layoutBuilder: namedArgs.containsKey('layoutBuilder')
+                ? namedArgs['layoutBuilder']
+                : defaultLayoutBuilder);
       case 'AnimatedCrossFade.defaultLayoutBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnimatedCrossFade.defaultLayoutBuilder(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnimatedCrossFade.defaultLayoutBuilder(positionalArgs[0],
+                positionalArgs[1], positionalArgs[2], positionalArgs[3]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -69,9 +83,15 @@ class AnimatedCrossFadeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'AnimatedCrossFadeBuilder': (HTFunction function) => (topChild, topChildKey, bottomChild, bottomChildKey) =>
-          function.call(positionalArgs: [topChild, topChildKey, bottomChild, bottomChildKey], namedArgs: const {})
-              as Widget,
+      'AnimatedCrossFadeBuilder': (HTFunction function) =>
+          (topChild, topChildKey, bottomChild, bottomChildKey) => function.call(
+                  positionalArgs: [
+                    topChild,
+                    topChildKey,
+                    bottomChild,
+                    bottomChildKey
+                  ],
+                  namedArgs: const {}) as Widget,
     };
   }
 }
@@ -80,7 +100,7 @@ extension AnimatedCrossFadeBinding on AnimatedCrossFade {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedCrossFade');
+        return const HTType('AnimatedCrossFade');
       case 'firstChild':
         return firstChild;
       case 'secondChild':
@@ -108,29 +128,41 @@ extension AnimatedCrossFadeBinding on AnimatedCrossFade {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/animated_list.g.dart b/lib/bindings/flutter/widgets/animated_list.g.dart
index 0275d81..fe515ad 100644
--- a/lib/bindings/flutter/widgets/animated_list.g.dart
+++ b/lib/bindings/flutter/widgets/animated_list.g.dart
@@ -14,20 +14,34 @@ class AnimatedListAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => AnimatedList(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             itemBuilder: namedArgs['itemBuilder'],
-            initialItemCount: namedArgs.containsKey('initialItemCount') ? namedArgs['initialItemCount'] : 0,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null);
+            initialItemCount: namedArgs.containsKey('initialItemCount')
+                ? namedArgs['initialItemCount']
+                : 0,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null);
       case 'AnimatedList.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnimatedList.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnimatedList.of(positionalArgs[0]);
       case 'AnimatedList.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnimatedList.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnimatedList.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -38,8 +52,10 @@ class AnimatedListAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'AnimatedListItemBuilder': (HTFunction function) => (context, index, animation) =>
-          function.call(positionalArgs: [context, index, animation], namedArgs: const {}) as Widget,
+      'AnimatedListItemBuilder': (HTFunction function) =>
+          (context, index, animation) => function.call(
+              positionalArgs: [context, index, animation],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -48,7 +64,7 @@ extension AnimatedListBinding on AnimatedList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedList');
+        return const HTType('AnimatedList');
       case 'itemBuilder':
         return itemBuilder;
       case 'initialItemCount':
@@ -78,25 +94,37 @@ extension AnimatedListBinding on AnimatedList {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -110,7 +138,7 @@ class AnimatedListStateAutoBinding extends HTExternalClass {
       case 'AnimatedListState':
         return ({positionalArgs, namedArgs, typeArgs}) => AnimatedListState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -122,9 +150,11 @@ class AnimatedListStateAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'AnimatedListRemovedItemBuilder': (HTFunction function) =>
-          (context, animation) => function.call(positionalArgs: [context, animation], namedArgs: const {}) as Widget,
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+          (context, animation) => function.call(
+              positionalArgs: [context, animation],
+              namedArgs: const {}) as Widget,
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -133,7 +163,7 @@ extension AnimatedListStateBinding on AnimatedListState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedListState');
+        return const HTType('AnimatedListState');
       case 'widget':
         return widget;
       case 'context':
@@ -141,32 +171,44 @@ extension AnimatedListStateBinding on AnimatedListState {
       case 'mounted':
         return mounted;
       case 'insertItem':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertItem(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : _kDuration);
+        return ({positionalArgs, namedArgs, typeArgs}) => insertItem(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : _kDuration);
       case 'removeItem':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeItem(positionalArgs[0], positionalArgs[1],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : _kDuration);
+        return ({positionalArgs, namedArgs, typeArgs}) => removeItem(
+            positionalArgs[0], positionalArgs[1],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : _kDuration);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -181,13 +223,17 @@ class SliverAnimatedListAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SliverAnimatedList(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             itemBuilder: namedArgs['itemBuilder'],
-            initialItemCount: namedArgs.containsKey('initialItemCount') ? namedArgs['initialItemCount'] : 0);
+            initialItemCount: namedArgs.containsKey('initialItemCount')
+                ? namedArgs['initialItemCount']
+                : 0);
       case 'SliverAnimatedList.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverAnimatedList.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverAnimatedList.of(positionalArgs[0]);
       case 'SliverAnimatedList.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverAnimatedList.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverAnimatedList.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -198,8 +244,10 @@ class SliverAnimatedListAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'AnimatedListItemBuilder': (HTFunction function) => (context, index, animation) =>
-          function.call(positionalArgs: [context, index, animation], namedArgs: const {}) as Widget,
+      'AnimatedListItemBuilder': (HTFunction function) =>
+          (context, index, animation) => function.call(
+              positionalArgs: [context, index, animation],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -208,7 +256,7 @@ extension SliverAnimatedListBinding on SliverAnimatedList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverAnimatedList');
+        return const HTType('SliverAnimatedList');
       case 'itemBuilder':
         return itemBuilder;
       case 'initialItemCount':
@@ -224,25 +272,37 @@ extension SliverAnimatedListBinding on SliverAnimatedList {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -254,9 +314,10 @@ class SliverAnimatedListStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverAnimatedListState':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverAnimatedListState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverAnimatedListState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -268,9 +329,11 @@ class SliverAnimatedListStateAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'AnimatedListRemovedItemBuilder': (HTFunction function) =>
-          (context, animation) => function.call(positionalArgs: [context, animation], namedArgs: const {}) as Widget,
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+          (context, animation) => function.call(
+              positionalArgs: [context, animation],
+              namedArgs: const {}) as Widget,
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -279,7 +342,7 @@ extension SliverAnimatedListStateBinding on SliverAnimatedListState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverAnimatedListState');
+        return const HTType('SliverAnimatedListState');
       case 'widget':
         return widget;
       case 'context':
@@ -291,30 +354,42 @@ extension SliverAnimatedListStateBinding on SliverAnimatedListState {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'insertItem':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertItem(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : _kDuration);
+        return ({positionalArgs, namedArgs, typeArgs}) => insertItem(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : _kDuration);
       case 'removeItem':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeItem(positionalArgs[0], positionalArgs[1],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : _kDuration);
+        return ({positionalArgs, namedArgs, typeArgs}) => removeItem(
+            positionalArgs[0], positionalArgs[1],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : _kDuration);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/animated_size.g.dart b/lib/bindings/flutter/widgets/animated_size.g.dart
index b7e6a87..d532355 100644
--- a/lib/bindings/flutter/widgets/animated_size.g.dart
+++ b/lib/bindings/flutter/widgets/animated_size.g.dart
@@ -12,14 +12,22 @@ class AnimatedSizeAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => AnimatedSize(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
-            reverseDuration: namedArgs.containsKey('reverseDuration') ? namedArgs['reverseDuration'] : null,
+            reverseDuration: namedArgs.containsKey('reverseDuration')
+                ? namedArgs['reverseDuration']
+                : null,
             vsync: namedArgs['vsync'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +41,7 @@ extension AnimatedSizeBinding on AnimatedSize {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedSize');
+        return const HTType('AnimatedSize');
       case 'alignment':
         return alignment;
       case 'curve':
@@ -53,33 +61,47 @@ extension AnimatedSizeBinding on AnimatedSize {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/animated_switcher.g.dart b/lib/bindings/flutter/widgets/animated_switcher.g.dart
index a181ace..e8433cc 100644
--- a/lib/bindings/flutter/widgets/animated_switcher.g.dart
+++ b/lib/bindings/flutter/widgets/animated_switcher.g.dart
@@ -13,9 +13,15 @@ class AnimatedSwitcherAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             duration: namedArgs['duration'],
-            reverseDuration: namedArgs.containsKey('reverseDuration') ? namedArgs['reverseDuration'] : null,
-            switchInCurve: namedArgs.containsKey('switchInCurve') ? namedArgs['switchInCurve'] : Curves.linear,
-            switchOutCurve: namedArgs.containsKey('switchOutCurve') ? namedArgs['switchOutCurve'] : Curves.linear,
+            reverseDuration: namedArgs.containsKey('reverseDuration')
+                ? namedArgs['reverseDuration']
+                : null,
+            switchInCurve: namedArgs.containsKey('switchInCurve')
+                ? namedArgs['switchInCurve']
+                : Curves.linear,
+            switchOutCurve: namedArgs.containsKey('switchOutCurve')
+                ? namedArgs['switchOutCurve']
+                : Curves.linear,
             transitionBuilder: namedArgs.containsKey('transitionBuilder')
                 ? namedArgs['transitionBuilder']
                 : AnimatedSwitcher.defaultTransitionBuilder,
@@ -24,12 +30,14 @@ class AnimatedSwitcherAutoBinding extends HTExternalClass {
                 : AnimatedSwitcher.defaultLayoutBuilder);
       case 'AnimatedSwitcher.defaultTransitionBuilder':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            AnimatedSwitcher.defaultTransitionBuilder(positionalArgs[0], positionalArgs[1]);
+            AnimatedSwitcher.defaultTransitionBuilder(
+                positionalArgs[0], positionalArgs[1]);
       case 'AnimatedSwitcher.defaultLayoutBuilder':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            AnimatedSwitcher.defaultLayoutBuilder(positionalArgs[0], List<Widget>.from(positionalArgs[1]));
+            AnimatedSwitcher.defaultLayoutBuilder(
+                positionalArgs[0], List<Widget>.from(positionalArgs[1]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -40,10 +48,14 @@ class AnimatedSwitcherAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'AnimatedSwitcherTransitionBuilder': (HTFunction function) =>
-          (child, animation) => function.call(positionalArgs: [child, animation], namedArgs: const {}) as Widget,
-      'AnimatedSwitcherLayoutBuilder': (HTFunction function) => (currentChild, previousChildren) =>
-          function.call(positionalArgs: [currentChild, previousChildren], namedArgs: const {}) as Widget,
+      'AnimatedSwitcherTransitionBuilder': (HTFunction function) => (child,
+              animation) =>
+          function.call(positionalArgs: [child, animation], namedArgs: const {})
+              as Widget,
+      'AnimatedSwitcherLayoutBuilder': (HTFunction function) =>
+          (currentChild, previousChildren) => function.call(
+              positionalArgs: [currentChild, previousChildren],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -52,7 +64,7 @@ extension AnimatedSwitcherBinding on AnimatedSwitcher {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedSwitcher');
+        return const HTType('AnimatedSwitcher');
       case 'child':
         return child;
       case 'duration':
@@ -74,29 +86,41 @@ extension AnimatedSwitcherBinding on AnimatedSwitcher {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/app.g.dart b/lib/bindings/flutter/widgets/app.g.dart
index 695bd1f..b95355a 100644
--- a/lib/bindings/flutter/widgets/app.g.dart
+++ b/lib/bindings/flutter/widgets/app.g.dart
@@ -12,94 +12,120 @@ class WidgetsAppAutoBinding extends HTExternalClass {
       case 'WidgetsApp':
         return ({positionalArgs, namedArgs, typeArgs}) => WidgetsApp(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            navigatorKey: namedArgs.containsKey('navigatorKey') ? namedArgs['navigatorKey'] : null,
-            onGenerateRoute: namedArgs.containsKey('onGenerateRoute') ? namedArgs['onGenerateRoute'] : null,
-            onGenerateInitialRoutes:
-                namedArgs.containsKey('onGenerateInitialRoutes') ? namedArgs['onGenerateInitialRoutes'] : null,
-            onUnknownRoute: namedArgs.containsKey('onUnknownRoute') ? namedArgs['onUnknownRoute'] : null,
+            navigatorKey: namedArgs.containsKey('navigatorKey')
+                ? namedArgs['navigatorKey']
+                : null,
+            onGenerateRoute: namedArgs.containsKey('onGenerateRoute')
+                ? namedArgs['onGenerateRoute']
+                : null,
+            onGenerateInitialRoutes: namedArgs.containsKey('onGenerateInitialRoutes')
+                ? namedArgs['onGenerateInitialRoutes']
+                : null,
+            onUnknownRoute: namedArgs.containsKey('onUnknownRoute')
+                ? namedArgs['onUnknownRoute']
+                : null,
             navigatorObservers: namedArgs.containsKey('navigatorObservers')
                 ? List<NavigatorObserver>.from(namedArgs['navigatorObservers'])
                 : const <NavigatorObserver>[],
-            initialRoute: namedArgs.containsKey('initialRoute') ? namedArgs['initialRoute'] : null,
-            pageRouteBuilder: namedArgs.containsKey('pageRouteBuilder') ? namedArgs['pageRouteBuilder'] : null,
+            initialRoute: namedArgs.containsKey('initialRoute')
+                ? namedArgs['initialRoute']
+                : null,
+            pageRouteBuilder: namedArgs.containsKey('pageRouteBuilder')
+                ? namedArgs['pageRouteBuilder']
+                : null,
             home: namedArgs.containsKey('home') ? namedArgs['home'] : null,
-            routes: namedArgs.containsKey('routes') ? namedArgs['routes'] : const <String, WidgetBuilder>{},
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            routes: namedArgs.containsKey('routes')
+                ? namedArgs['routes']
+                : const <String, WidgetBuilder>{},
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : '',
-            onGenerateTitle: namedArgs.containsKey('onGenerateTitle') ? namedArgs['onGenerateTitle'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
+            onGenerateTitle: namedArgs.containsKey('onGenerateTitle')
+                ? namedArgs['onGenerateTitle']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
             color: namedArgs['color'],
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            localizationsDelegates:
-                namedArgs.containsKey('localizationsDelegates') ? namedArgs['localizationsDelegates'] : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            localizationsDelegates: namedArgs.containsKey('localizationsDelegates')
+                ? namedArgs['localizationsDelegates']
+                : null,
             localeListResolutionCallback: namedArgs.containsKey('localeListResolutionCallback')
                 ? namedArgs['localeListResolutionCallback']
                 : null,
-            localeResolutionCallback:
-                namedArgs.containsKey('localeResolutionCallback') ? namedArgs['localeResolutionCallback'] : null,
+            localeResolutionCallback: namedArgs.containsKey('localeResolutionCallback')
+                ? namedArgs['localeResolutionCallback']
+                : null,
             supportedLocales: namedArgs.containsKey('supportedLocales')
                 ? namedArgs['supportedLocales']
                 : const <Locale>[Locale('en', 'US')],
-            showPerformanceOverlay:
-                namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
+            showPerformanceOverlay: namedArgs.containsKey('showPerformanceOverlay')
+                ? namedArgs['showPerformanceOverlay']
+                : false,
             checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
                 ? namedArgs['checkerboardRasterCacheImages']
                 : false,
-            checkerboardOffscreenLayers:
-                namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
-            showSemanticsDebugger:
-                namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
-            debugShowWidgetInspector:
-                namedArgs.containsKey('debugShowWidgetInspector') ? namedArgs['debugShowWidgetInspector'] : false,
-            debugShowCheckedModeBanner:
-                namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
-            inspectorSelectButtonBuilder: namedArgs.containsKey('inspectorSelectButtonBuilder')
-                ? namedArgs['inspectorSelectButtonBuilder']
-                : null,
+            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers')
+                ? namedArgs['checkerboardOffscreenLayers']
+                : false,
+            showSemanticsDebugger: namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
+            debugShowWidgetInspector: namedArgs.containsKey('debugShowWidgetInspector') ? namedArgs['debugShowWidgetInspector'] : false,
+            debugShowCheckedModeBanner: namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
+            inspectorSelectButtonBuilder: namedArgs.containsKey('inspectorSelectButtonBuilder') ? namedArgs['inspectorSelectButtonBuilder'] : null,
             shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : null,
             actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
             restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
       case 'WidgetsApp.router':
         return ({positionalArgs, namedArgs, typeArgs}) => WidgetsApp.router(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            routeInformationProvider:
-                namedArgs.containsKey('routeInformationProvider') ? namedArgs['routeInformationProvider'] : null,
+            routeInformationProvider: namedArgs.containsKey('routeInformationProvider')
+                ? namedArgs['routeInformationProvider']
+                : null,
             routeInformationParser: namedArgs['routeInformationParser'],
             routerDelegate: namedArgs['routerDelegate'],
-            backButtonDispatcher:
-                namedArgs.containsKey('backButtonDispatcher') ? namedArgs['backButtonDispatcher'] : null,
-            builder: namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
+            backButtonDispatcher: namedArgs.containsKey('backButtonDispatcher')
+                ? namedArgs['backButtonDispatcher']
+                : null,
+            builder:
+                namedArgs.containsKey('builder') ? namedArgs['builder'] : null,
             title: namedArgs.containsKey('title') ? namedArgs['title'] : '',
-            onGenerateTitle: namedArgs.containsKey('onGenerateTitle') ? namedArgs['onGenerateTitle'] : null,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : null,
+            onGenerateTitle: namedArgs.containsKey('onGenerateTitle')
+                ? namedArgs['onGenerateTitle']
+                : null,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : null,
             color: namedArgs['color'],
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            localizationsDelegates:
-                namedArgs.containsKey('localizationsDelegates') ? namedArgs['localizationsDelegates'] : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            localizationsDelegates: namedArgs.containsKey('localizationsDelegates')
+                ? namedArgs['localizationsDelegates']
+                : null,
             localeListResolutionCallback: namedArgs.containsKey('localeListResolutionCallback')
                 ? namedArgs['localeListResolutionCallback']
                 : null,
-            localeResolutionCallback:
-                namedArgs.containsKey('localeResolutionCallback') ? namedArgs['localeResolutionCallback'] : null,
+            localeResolutionCallback: namedArgs.containsKey('localeResolutionCallback')
+                ? namedArgs['localeResolutionCallback']
+                : null,
             supportedLocales: namedArgs.containsKey('supportedLocales')
                 ? namedArgs['supportedLocales']
                 : const <Locale>[Locale('en', 'US')],
-            showPerformanceOverlay:
-                namedArgs.containsKey('showPerformanceOverlay') ? namedArgs['showPerformanceOverlay'] : false,
-            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
-                ? namedArgs['checkerboardRasterCacheImages']
+            showPerformanceOverlay: namedArgs.containsKey('showPerformanceOverlay')
+                ? namedArgs['showPerformanceOverlay']
                 : false,
-            checkerboardOffscreenLayers:
-                namedArgs.containsKey('checkerboardOffscreenLayers') ? namedArgs['checkerboardOffscreenLayers'] : false,
-            showSemanticsDebugger:
-                namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
-            debugShowWidgetInspector:
-                namedArgs.containsKey('debugShowWidgetInspector') ? namedArgs['debugShowWidgetInspector'] : false,
-            debugShowCheckedModeBanner:
-                namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
-            inspectorSelectButtonBuilder: namedArgs.containsKey('inspectorSelectButtonBuilder')
-                ? namedArgs['inspectorSelectButtonBuilder']
-                : null,
+            checkerboardRasterCacheImages:
+                namedArgs.containsKey('checkerboardRasterCacheImages')
+                    ? namedArgs['checkerboardRasterCacheImages']
+                    : false,
+            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers')
+                ? namedArgs['checkerboardOffscreenLayers']
+                : false,
+            showSemanticsDebugger: namedArgs.containsKey('showSemanticsDebugger') ? namedArgs['showSemanticsDebugger'] : false,
+            debugShowWidgetInspector: namedArgs.containsKey('debugShowWidgetInspector') ? namedArgs['debugShowWidgetInspector'] : false,
+            debugShowCheckedModeBanner: namedArgs.containsKey('debugShowCheckedModeBanner') ? namedArgs['debugShowCheckedModeBanner'] : true,
+            inspectorSelectButtonBuilder: namedArgs.containsKey('inspectorSelectButtonBuilder') ? namedArgs['inspectorSelectButtonBuilder'] : null,
             shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : null,
             actions: namedArgs.containsKey('actions') ? namedArgs['actions'] : null,
             restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
@@ -114,12 +140,13 @@ class WidgetsAppAutoBinding extends HTExternalClass {
       case 'WidgetsApp.defaultActions':
         return WidgetsApp.defaultActions;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'WidgetsApp.showPerformanceOverlayOverride':
         return WidgetsApp.showPerformanceOverlayOverride = value;
@@ -130,7 +157,7 @@ class WidgetsAppAutoBinding extends HTExternalClass {
       case 'WidgetsApp.defaultActions':
         return WidgetsApp.defaultActions = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -141,20 +168,29 @@ class WidgetsAppAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RouteFactory': (HTFunction function) =>
-          (settings) => function.call(positionalArgs: [settings], namedArgs: const {}) as Route<dynamic>?,
-      'InitialRouteListFactory': (HTFunction function) =>
-          (initialRoute) => function.call(positionalArgs: [initialRoute], namedArgs: const {}) as List<Route<dynamic>>,
-      'TransitionBuilder': (HTFunction function) =>
-          (context, child) => function.call(positionalArgs: [context, child], namedArgs: const {}) as Widget,
-      'GenerateAppTitle': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as String,
-      'LocaleListResolutionCallback': (HTFunction function) => (locales, supportedLocales) =>
-          function.call(positionalArgs: [locales, supportedLocales], namedArgs: const {}) as Locale?,
-      'LocaleResolutionCallback': (HTFunction function) => (locale, supportedLocales) =>
-          function.call(positionalArgs: [locale, supportedLocales], namedArgs: const {}) as Locale?,
+      'RouteFactory': (HTFunction function) => (settings) =>
+          function.call(positionalArgs: [settings], namedArgs: const {})
+              as Route<dynamic>?,
+      'InitialRouteListFactory': (HTFunction function) => (initialRoute) =>
+          function.call(positionalArgs: [initialRoute], namedArgs: const {})
+              as List<Route<dynamic>>,
+      'TransitionBuilder': (HTFunction function) => (context, child) =>
+          function.call(positionalArgs: [context, child], namedArgs: const {})
+              as Widget,
+      'GenerateAppTitle': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as String,
+      'LocaleListResolutionCallback': (HTFunction function) =>
+          (locales, supportedLocales) => function.call(
+              positionalArgs: [locales, supportedLocales],
+              namedArgs: const {}) as Locale?,
+      'LocaleResolutionCallback': (HTFunction function) =>
+          (locale, supportedLocales) => function.call(
+              positionalArgs: [locale, supportedLocales],
+              namedArgs: const {}) as Locale?,
       'InspectorSelectButtonBuilder': (HTFunction function) =>
-          (context, onPressed) => function.call(positionalArgs: [context, onPressed], namedArgs: const {}) as Widget,
+          (context, onPressed) => function.call(
+              positionalArgs: [context, onPressed],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -163,7 +199,7 @@ extension WidgetsAppBinding on WidgetsApp {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WidgetsApp');
+        return const HTType('WidgetsApp');
       case 'navigatorKey':
         return navigatorKey;
       case 'onGenerateRoute':
@@ -241,25 +277,37 @@ extension WidgetsAppBinding on WidgetsApp {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/async.g.dart b/lib/bindings/flutter/widgets/async.g.dart
index 623c08d..9f73efb 100644
--- a/lib/bindings/flutter/widgets/async.g.dart
+++ b/lib/bindings/flutter/widgets/async.g.dart
@@ -18,7 +18,7 @@ class ConnectionStateAutoBinding extends HTExternalClass {
       case 'ConnectionState.done':
         return ConnectionState.done;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class ConnectionStateAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ConnectionState');
+        return const HTType('ConnectionState');
       case 'index':
         return (instance as ConnectionState).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ConnectionState).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ConnectionState).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/autofill.g.dart b/lib/bindings/flutter/widgets/autofill.g.dart
index 8b4596e..5f6a114 100644
--- a/lib/bindings/flutter/widgets/autofill.g.dart
+++ b/lib/bindings/flutter/widgets/autofill.g.dart
@@ -14,7 +14,7 @@ class AutofillContextActionAutoBinding extends HTExternalClass {
       case 'AutofillContextAction.cancel':
         return AutofillContextAction.cancel;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class AutofillContextActionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AutofillContextAction');
+        return const HTType('AutofillContextAction');
       case 'index':
         return (instance as AutofillContextAction).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as AutofillContextAction).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as AutofillContextAction).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -43,12 +44,14 @@ class AutofillGroupAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => AutofillGroup(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            onDisposeAction:
-                namedArgs.containsKey('onDisposeAction') ? namedArgs['onDisposeAction'] : AutofillContextAction.commit);
+            onDisposeAction: namedArgs.containsKey('onDisposeAction')
+                ? namedArgs['onDisposeAction']
+                : AutofillContextAction.commit);
       case 'AutofillGroup.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => AutofillGroup.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AutofillGroup.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,7 +65,7 @@ extension AutofillGroupBinding on AutofillGroup {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AutofillGroup');
+        return const HTType('AutofillGroup');
       case 'child':
         return child;
       case 'onDisposeAction':
@@ -78,25 +81,37 @@ extension AutofillGroupBinding on AutofillGroup {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -110,7 +125,7 @@ class AutofillGroupStateAutoBinding extends HTExternalClass {
       case 'AutofillGroupState':
         return ({positionalArgs, namedArgs, typeArgs}) => AutofillGroupState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -124,7 +139,7 @@ extension AutofillGroupStateBinding on AutofillGroupState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AutofillGroupState');
+        return const HTType('AutofillGroupState');
       case 'autofillClients':
         return autofillClients;
       case 'widget':
@@ -134,32 +149,41 @@ extension AutofillGroupStateBinding on AutofillGroupState {
       case 'mounted':
         return mounted;
       case 'getAutofillClient':
-        return ({positionalArgs, namedArgs, typeArgs}) => getAutofillClient(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getAutofillClient(positionalArgs[0]);
       case 'register':
-        return ({positionalArgs, namedArgs, typeArgs}) => register(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            register(positionalArgs[0]);
       case 'unregister':
-        return ({positionalArgs, namedArgs, typeArgs}) => unregister(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            unregister(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/automatic_keep_alive.g.dart b/lib/bindings/flutter/widgets/automatic_keep_alive.g.dart
index 54a1184..c9104cf 100644
--- a/lib/bindings/flutter/widgets/automatic_keep_alive.g.dart
+++ b/lib/bindings/flutter/widgets/automatic_keep_alive.g.dart
@@ -14,7 +14,7 @@ class AutomaticKeepAliveAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +28,7 @@ extension AutomaticKeepAliveBinding on AutomaticKeepAlive {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AutomaticKeepAlive');
+        return const HTType('AutomaticKeepAlive');
       case 'child':
         return child;
       case 'key':
@@ -42,25 +42,37 @@ extension AutomaticKeepAliveBinding on AutomaticKeepAlive {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -72,9 +84,10 @@ class KeepAliveNotificationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'KeepAliveNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => KeepAliveNotification(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            KeepAliveNotification(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -88,15 +101,16 @@ extension KeepAliveNotificationBinding on KeepAliveNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('KeepAliveNotification');
+        return const HTType('KeepAliveNotification');
       case 'handle':
         return handle;
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -110,7 +124,7 @@ class KeepAliveHandleAutoBinding extends HTExternalClass {
       case 'KeepAliveHandle':
         return ({positionalArgs, namedArgs, typeArgs}) => KeepAliveHandle();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -121,7 +135,8 @@ class KeepAliveHandleAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -130,17 +145,19 @@ extension KeepAliveHandleBinding on KeepAliveHandle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('KeepAliveHandle');
+        return const HTType('KeepAliveHandle');
       case 'release':
         return ({positionalArgs, namedArgs, typeArgs}) => release();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/banner.g.dart b/lib/bindings/flutter/widgets/banner.g.dart
index f6a9e36..3219273 100644
--- a/lib/bindings/flutter/widgets/banner.g.dart
+++ b/lib/bindings/flutter/widgets/banner.g.dart
@@ -4,8 +4,11 @@ import 'package:flutter/foundation.dart';
 
 const _kColor = Color(0xA0B71C1C);
 const _kHeight = 12.0;
-const _kTextStyle =
-    TextStyle(color: Color(0xFFFFFFFF), fontSize: _kHeight * 0.85, fontWeight: FontWeight.w900, height: 1.0);
+const _kTextStyle = TextStyle(
+    color: Color(0xFFFFFFFF),
+    fontSize: _kHeight * 0.85,
+    fontWeight: FontWeight.w900,
+    height: 1.0);
 
 class BannerLocationAutoBinding extends HTExternalClass {
   BannerLocationAutoBinding() : super('BannerLocation');
@@ -24,7 +27,7 @@ class BannerLocationAutoBinding extends HTExternalClass {
       case 'BannerLocation.bottomEnd':
         return BannerLocation.bottomEnd;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,13 +35,14 @@ class BannerLocationAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BannerLocation');
+        return const HTType('BannerLocation');
       case 'index':
         return (instance as BannerLocation).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as BannerLocation).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as BannerLocation).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -55,10 +59,13 @@ class BannerPainterAutoBinding extends HTExternalClass {
             textDirection: namedArgs['textDirection'],
             location: namedArgs['location'],
             layoutDirection: namedArgs['layoutDirection'],
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : _kColor,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : _kTextStyle);
+            color:
+                namedArgs.containsKey('color') ? namedArgs['color'] : _kColor,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : _kTextStyle);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -69,7 +76,8 @@ class BannerPainterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -78,7 +86,7 @@ extension BannerPainterBinding on BannerPainter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BannerPainter');
+        return const HTType('BannerPainter');
       case 'message':
         return message;
       case 'textDirection':
@@ -94,21 +102,27 @@ extension BannerPainterBinding on BannerPainter {
       case 'semanticsBuilder':
         return semanticsBuilder;
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'shouldRepaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRepaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRepaint(positionalArgs[0]);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTest(positionalArgs[0]);
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'shouldRebuildSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRebuildSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRebuildSemantics(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -124,13 +138,20 @@ class BannerAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             message: namedArgs['message'],
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             location: namedArgs['location'],
-            layoutDirection: namedArgs.containsKey('layoutDirection') ? namedArgs['layoutDirection'] : null,
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : _kColor,
-            textStyle: namedArgs.containsKey('textStyle') ? namedArgs['textStyle'] : _kTextStyle);
+            layoutDirection: namedArgs.containsKey('layoutDirection')
+                ? namedArgs['layoutDirection']
+                : null,
+            color:
+                namedArgs.containsKey('color') ? namedArgs['color'] : _kColor,
+            textStyle: namedArgs.containsKey('textStyle')
+                ? namedArgs['textStyle']
+                : _kTextStyle);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -144,7 +165,7 @@ extension BannerBinding on Banner {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Banner');
+        return const HTType('Banner');
       case 'child':
         return child;
       case 'message':
@@ -164,31 +185,44 @@ extension BannerBinding on Banner {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -200,10 +234,11 @@ class CheckedModeBannerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CheckedModeBanner':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            CheckedModeBanner(key: namedArgs.containsKey('key') ? namedArgs['key'] : null, child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) => CheckedModeBanner(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -217,7 +252,7 @@ extension CheckedModeBannerBinding on CheckedModeBanner {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CheckedModeBanner');
+        return const HTType('CheckedModeBanner');
       case 'child':
         return child;
       case 'key':
@@ -225,31 +260,44 @@ extension CheckedModeBannerBinding on CheckedModeBanner {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/basic.g.dart b/lib/bindings/flutter/widgets/basic.g.dart
index ed47563..cd43f53 100644
--- a/lib/bindings/flutter/widgets/basic.g.dart
+++ b/lib/bindings/flutter/widgets/basic.g.dart
@@ -16,11 +16,13 @@ class DirectionalityAutoBinding extends HTExternalClass {
             textDirection: namedArgs['textDirection'],
             child: namedArgs['child']);
       case 'Directionality.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Directionality.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Directionality.of(positionalArgs[0]);
       case 'Directionality.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => Directionality.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Directionality.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +36,7 @@ extension DirectionalityBinding on Directionality {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Directionality');
+        return const HTType('Directionality');
       case 'textDirection':
         return textDirection;
       case 'child':
@@ -44,31 +46,44 @@ extension DirectionalityBinding on Directionality {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -84,10 +99,12 @@ class OpacityAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             opacity: namedArgs['opacity'],
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -101,7 +118,7 @@ extension OpacityBinding on Opacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Opacity');
+        return const HTType('Opacity');
       case 'opacity':
         return opacity;
       case 'alwaysIncludeSemantics':
@@ -113,33 +130,47 @@ extension OpacityBinding on Opacity {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -154,10 +185,12 @@ class ShaderMaskAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ShaderMask(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             shaderCallback: namedArgs['shaderCallback'],
-            blendMode: namedArgs.containsKey('blendMode') ? namedArgs['blendMode'] : BlendMode.modulate,
+            blendMode: namedArgs.containsKey('blendMode')
+                ? namedArgs['blendMode']
+                : BlendMode.modulate,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -168,8 +201,8 @@ class ShaderMaskAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ShaderCallback': (HTFunction function) =>
-          (bounds) => function.call(positionalArgs: [bounds], namedArgs: const {}) as Shader,
+      'ShaderCallback': (HTFunction function) => (bounds) => function
+          .call(positionalArgs: [bounds], namedArgs: const {}) as Shader,
     };
   }
 }
@@ -178,7 +211,7 @@ extension ShaderMaskBinding on ShaderMask {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShaderMask');
+        return const HTType('ShaderMask');
       case 'shaderCallback':
         return shaderCallback;
       case 'blendMode':
@@ -190,33 +223,47 @@ extension ShaderMaskBinding on ShaderMask {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -233,7 +280,7 @@ class BackdropFilterAutoBinding extends HTExternalClass {
             filter: namedArgs['filter'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -247,7 +294,7 @@ extension BackdropFilterBinding on BackdropFilter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BackdropFilter');
+        return const HTType('BackdropFilter');
       case 'filter':
         return filter;
       case 'child':
@@ -257,33 +304,47 @@ extension BackdropFilterBinding on BackdropFilter {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -297,14 +358,21 @@ class CustomPaintAutoBinding extends HTExternalClass {
       case 'CustomPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => CustomPaint(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            painter: namedArgs.containsKey('painter') ? namedArgs['painter'] : null,
-            foregroundPainter: namedArgs.containsKey('foregroundPainter') ? namedArgs['foregroundPainter'] : null,
+            painter:
+                namedArgs.containsKey('painter') ? namedArgs['painter'] : null,
+            foregroundPainter: namedArgs.containsKey('foregroundPainter')
+                ? namedArgs['foregroundPainter']
+                : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : Size.zero,
-            isComplex: namedArgs.containsKey('isComplex') ? namedArgs['isComplex'] : false,
-            willChange: namedArgs.containsKey('willChange') ? namedArgs['willChange'] : false,
+            isComplex: namedArgs.containsKey('isComplex')
+                ? namedArgs['isComplex']
+                : false,
+            willChange: namedArgs.containsKey('willChange')
+                ? namedArgs['willChange']
+                : false,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -318,7 +386,7 @@ extension CustomPaintBinding on CustomPaint {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CustomPaint');
+        return const HTType('CustomPaint');
       case 'painter':
         return painter;
       case 'foregroundPainter':
@@ -336,35 +404,50 @@ extension CustomPaintBinding on CustomPaint {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'didUnmountRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnmountRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnmountRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -378,11 +461,14 @@ class ClipRectAutoBinding extends HTExternalClass {
       case 'ClipRect':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipRect(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -396,7 +482,7 @@ extension ClipRectBinding on ClipRect {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipRect');
+        return const HTType('ClipRect');
       case 'clipper':
         return clipper;
       case 'clipBehavior':
@@ -408,35 +494,50 @@ extension ClipRectBinding on ClipRect {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'didUnmountRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnmountRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnmountRenderObject(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -450,12 +551,17 @@ class ClipRRectAutoBinding extends HTExternalClass {
       case 'ClipRRect':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipRRect(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : BorderRadius.zero,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : BorderRadius.zero,
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -469,7 +575,7 @@ extension ClipRRectBinding on ClipRRect {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipRRect');
+        return const HTType('ClipRRect');
       case 'borderRadius':
         return borderRadius;
       case 'clipper':
@@ -483,33 +589,47 @@ extension ClipRRectBinding on ClipRRect {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -523,11 +643,14 @@ class ClipOvalAutoBinding extends HTExternalClass {
       case 'ClipOval':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipOval(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -541,7 +664,7 @@ extension ClipOvalBinding on ClipOval {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipOval');
+        return const HTType('ClipOval');
       case 'clipper':
         return clipper;
       case 'clipBehavior':
@@ -553,35 +676,50 @@ extension ClipOvalBinding on ClipOval {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'didUnmountRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnmountRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnmountRenderObject(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -595,17 +733,22 @@ class ClipPathAutoBinding extends HTExternalClass {
       case 'ClipPath':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipPath(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            clipper: namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
+            clipper:
+                namedArgs.containsKey('clipper') ? namedArgs['clipper'] : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'ClipPath.shape':
         return ({positionalArgs, namedArgs, typeArgs}) => ClipPath.shape(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.antiAlias,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.antiAlias,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -619,7 +762,7 @@ extension ClipPathBinding on ClipPath {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipPath');
+        return const HTType('ClipPath');
       case 'clipper':
         return clipper;
       case 'clipBehavior':
@@ -631,35 +774,50 @@ extension ClipPathBinding on ClipPath {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'didUnmountRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnmountRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnmountRenderObject(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -673,15 +831,25 @@ class PhysicalModelAutoBinding extends HTExternalClass {
       case 'PhysicalModel':
         return ({positionalArgs, namedArgs, typeArgs}) => PhysicalModel(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            shape: namedArgs.containsKey('shape') ? namedArgs['shape'] : BoxShape.rectangle,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : null,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 0.0,
+            shape: namedArgs.containsKey('shape')
+                ? namedArgs['shape']
+                : BoxShape.rectangle,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : null,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 0.0,
             color: namedArgs['color'],
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : const Color(0xFF000000),
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : const Color(0xFF000000),
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -695,7 +863,7 @@ extension PhysicalModelBinding on PhysicalModel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PhysicalModel');
+        return const HTType('PhysicalModel');
       case 'shape':
         return shape;
       case 'clipBehavior':
@@ -715,33 +883,47 @@ extension PhysicalModelBinding on PhysicalModel {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -756,13 +938,19 @@ class PhysicalShapeAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => PhysicalShape(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             clipper: namedArgs['clipper'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            elevation: namedArgs.containsKey('elevation') ? namedArgs['elevation'] : 0.0,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            elevation: namedArgs.containsKey('elevation')
+                ? namedArgs['elevation']
+                : 0.0,
             color: namedArgs['color'],
-            shadowColor: namedArgs.containsKey('shadowColor') ? namedArgs['shadowColor'] : const Color(0xFF000000),
+            shadowColor: namedArgs.containsKey('shadowColor')
+                ? namedArgs['shadowColor']
+                : const Color(0xFF000000),
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -776,7 +964,7 @@ extension PhysicalShapeBinding on PhysicalShape {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PhysicalShape');
+        return const HTType('PhysicalShape');
       case 'clipper':
         return clipper;
       case 'clipBehavior':
@@ -794,33 +982,47 @@ extension PhysicalShapeBinding on PhysicalShape {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -835,34 +1037,51 @@ class TransformAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Transform(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             transform: namedArgs['transform'],
-            origin: namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null,
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
+            origin:
+                namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null,
+            transformHitTests: namedArgs.containsKey('transformHitTests')
+                ? namedArgs['transformHitTests']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'Transform.rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => Transform.rotate(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             angle: namedArgs['angle'],
-            origin: namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
+            origin:
+                namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            transformHitTests: namedArgs.containsKey('transformHitTests')
+                ? namedArgs['transformHitTests']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'Transform.translate':
         return ({positionalArgs, namedArgs, typeArgs}) => Transform.translate(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             offset: namedArgs['offset'],
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
+            transformHitTests: namedArgs.containsKey('transformHitTests')
+                ? namedArgs['transformHitTests']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'Transform.scale':
         return ({positionalArgs, namedArgs, typeArgs}) => Transform.scale(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             scale: namedArgs['scale'],
-            origin: namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
+            origin:
+                namedArgs.containsKey('origin') ? namedArgs['origin'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            transformHitTests: namedArgs.containsKey('transformHitTests')
+                ? namedArgs['transformHitTests']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -876,7 +1095,7 @@ extension TransformBinding on Transform {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Transform');
+        return const HTType('Transform');
       case 'transform':
         return transform;
       case 'origin':
@@ -892,33 +1111,47 @@ extension TransformBinding on Transform {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -930,12 +1163,14 @@ class CompositedTransformTargetAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CompositedTransformTarget':
-        return ({positionalArgs, namedArgs, typeArgs}) => CompositedTransformTarget(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            link: namedArgs['link'],
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CompositedTransformTarget(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                link: namedArgs['link'],
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -949,7 +1184,7 @@ extension CompositedTransformTargetBinding on CompositedTransformTarget {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CompositedTransformTarget');
+        return const HTType('CompositedTransformTarget');
       case 'link':
         return link;
       case 'child':
@@ -959,54 +1194,79 @@ extension CompositedTransformTargetBinding on CompositedTransformTarget {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class CompositedTransformFollowerAutoBinding extends HTExternalClass {
-  CompositedTransformFollowerAutoBinding() : super('CompositedTransformFollower');
+  CompositedTransformFollowerAutoBinding()
+      : super('CompositedTransformFollower');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CompositedTransformFollower':
-        return ({positionalArgs, namedArgs, typeArgs}) => CompositedTransformFollower(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            link: namedArgs['link'],
-            showWhenUnlinked: namedArgs.containsKey('showWhenUnlinked') ? namedArgs['showWhenUnlinked'] : true,
-            offset: namedArgs.containsKey('offset') ? namedArgs['offset'] : Offset.zero,
-            targetAnchor: namedArgs.containsKey('targetAnchor') ? namedArgs['targetAnchor'] : Alignment.topLeft,
-            followerAnchor: namedArgs.containsKey('followerAnchor') ? namedArgs['followerAnchor'] : Alignment.topLeft,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CompositedTransformFollower(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                link: namedArgs['link'],
+                showWhenUnlinked: namedArgs.containsKey('showWhenUnlinked')
+                    ? namedArgs['showWhenUnlinked']
+                    : true,
+                offset: namedArgs.containsKey('offset')
+                    ? namedArgs['offset']
+                    : Offset.zero,
+                targetAnchor: namedArgs.containsKey('targetAnchor')
+                    ? namedArgs['targetAnchor']
+                    : Alignment.topLeft,
+                followerAnchor: namedArgs.containsKey('followerAnchor')
+                    ? namedArgs['followerAnchor']
+                    : Alignment.topLeft,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1020,7 +1280,7 @@ extension CompositedTransformFollowerBinding on CompositedTransformFollower {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CompositedTransformFollower');
+        return const HTType('CompositedTransformFollower');
       case 'link':
         return link;
       case 'showWhenUnlinked':
@@ -1038,33 +1298,47 @@ extension CompositedTransformFollowerBinding on CompositedTransformFollower {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1078,12 +1352,18 @@ class FittedBoxAutoBinding extends HTExternalClass {
       case 'FittedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => FittedBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : BoxFit.contain,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
+            fit: namedArgs.containsKey('fit')
+                ? namedArgs['fit']
+                : BoxFit.contain,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1097,7 +1377,7 @@ extension FittedBoxBinding on FittedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FittedBox');
+        return const HTType('FittedBox');
       case 'fit':
         return fit;
       case 'alignment':
@@ -1111,33 +1391,47 @@ extension FittedBoxBinding on FittedBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1152,10 +1446,12 @@ class FractionalTranslationAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => FractionalTranslation(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             translation: namedArgs['translation'],
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
+            transformHitTests: namedArgs.containsKey('transformHitTests')
+                ? namedArgs['transformHitTests']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1169,7 +1465,7 @@ extension FractionalTranslationBinding on FractionalTranslation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FractionalTranslation');
+        return const HTType('FractionalTranslation');
       case 'translation':
         return translation;
       case 'transformHitTests':
@@ -1181,33 +1477,47 @@ extension FractionalTranslationBinding on FractionalTranslation {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1224,7 +1534,7 @@ class RotatedBoxAutoBinding extends HTExternalClass {
             quarterTurns: namedArgs['quarterTurns'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1238,7 +1548,7 @@ extension RotatedBoxBinding on RotatedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RotatedBox');
+        return const HTType('RotatedBox');
       case 'quarterTurns':
         return quarterTurns;
       case 'child':
@@ -1248,33 +1558,47 @@ extension RotatedBoxBinding on RotatedBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1291,7 +1615,7 @@ class PaddingAutoBinding extends HTExternalClass {
             padding: namedArgs['padding'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1305,7 +1629,7 @@ extension PaddingBinding on Padding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Padding');
+        return const HTType('Padding');
       case 'padding':
         return padding;
       case 'child':
@@ -1315,33 +1639,47 @@ extension PaddingBinding on Padding {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1355,12 +1693,18 @@ class AlignAutoBinding extends HTExternalClass {
       case 'Align':
         return ({positionalArgs, namedArgs, typeArgs}) => Align(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            widthFactor: namedArgs.containsKey('widthFactor') ? namedArgs['widthFactor'] : null,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            widthFactor: namedArgs.containsKey('widthFactor')
+                ? namedArgs['widthFactor']
+                : null,
+            heightFactor: namedArgs.containsKey('heightFactor')
+                ? namedArgs['heightFactor']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1374,7 +1718,7 @@ extension AlignBinding on Align {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Align');
+        return const HTType('Align');
       case 'alignment':
         return alignment;
       case 'widthFactor':
@@ -1388,33 +1732,47 @@ extension AlignBinding on Align {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1428,11 +1786,15 @@ class CenterAutoBinding extends HTExternalClass {
       case 'Center':
         return ({positionalArgs, namedArgs, typeArgs}) => Center(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            widthFactor: namedArgs.containsKey('widthFactor') ? namedArgs['widthFactor'] : null,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : null,
+            widthFactor: namedArgs.containsKey('widthFactor')
+                ? namedArgs['widthFactor']
+                : null,
+            heightFactor: namedArgs.containsKey('heightFactor')
+                ? namedArgs['heightFactor']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1446,7 +1808,7 @@ extension CenterBinding on Center {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Center');
+        return const HTType('Center');
       case 'alignment':
         return alignment;
       case 'widthFactor':
@@ -1460,33 +1822,47 @@ extension CenterBinding on Center {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1498,12 +1874,14 @@ class CustomSingleChildLayoutAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CustomSingleChildLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => CustomSingleChildLayout(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            delegate: namedArgs['delegate'],
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CustomSingleChildLayout(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                delegate: namedArgs['delegate'],
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1517,7 +1895,7 @@ extension CustomSingleChildLayoutBinding on CustomSingleChildLayout {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CustomSingleChildLayout');
+        return const HTType('CustomSingleChildLayout');
       case 'delegate':
         return delegate;
       case 'child':
@@ -1527,33 +1905,47 @@ extension CustomSingleChildLayoutBinding on CustomSingleChildLayout {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1570,7 +1962,7 @@ class LayoutIdAutoBinding extends HTExternalClass {
             id: namedArgs['id'],
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1584,7 +1976,7 @@ extension LayoutIdBinding on LayoutId {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LayoutId');
+        return const HTType('LayoutId');
       case 'id':
         return id;
       case 'child':
@@ -1596,33 +1988,47 @@ extension LayoutIdBinding on LayoutId {
       case 'hashCode':
         return hashCode;
       case 'applyParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyParentData(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugIsValidRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugIsValidRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugIsValidRenderObject(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1634,12 +2040,15 @@ class CustomMultiChildLayoutAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'CustomMultiChildLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => CustomMultiChildLayout(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            delegate: namedArgs['delegate'],
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            CustomMultiChildLayout(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                delegate: namedArgs['delegate'],
+                children: namedArgs.containsKey('children')
+                    ? List<Widget>.from(namedArgs['children'])
+                    : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1653,7 +2062,7 @@ extension CustomMultiChildLayoutBinding on CustomMultiChildLayout {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CustomMultiChildLayout');
+        return const HTType('CustomMultiChildLayout');
       case 'delegate':
         return delegate;
       case 'children':
@@ -1663,33 +2072,47 @@ extension CustomMultiChildLayoutBinding on CustomMultiChildLayout {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1704,7 +2127,8 @@ class SizedBoxAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SizedBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'SizedBox.expand':
         return ({positionalArgs, namedArgs, typeArgs}) => SizedBox.expand(
@@ -1720,7 +2144,7 @@ class SizedBoxAutoBinding extends HTExternalClass {
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1734,7 +2158,7 @@ extension SizedBoxBinding on SizedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SizedBox');
+        return const HTType('SizedBox');
       case 'width':
         return width;
       case 'height':
@@ -1746,33 +2170,47 @@ extension SizedBoxBinding on SizedBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1789,7 +2227,7 @@ class ConstrainedBoxAutoBinding extends HTExternalClass {
             constraints: namedArgs['constraints'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1803,7 +2241,7 @@ extension ConstrainedBoxBinding on ConstrainedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ConstrainedBox');
+        return const HTType('ConstrainedBox');
       case 'constraints':
         return constraints;
       case 'child':
@@ -1813,33 +2251,47 @@ extension ConstrainedBoxBinding on ConstrainedBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1854,12 +2306,20 @@ class UnconstrainedBoxAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => UnconstrainedBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            constrainedAxis: namedArgs.containsKey('constrainedAxis') ? namedArgs['constrainedAxis'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            constrainedAxis: namedArgs.containsKey('constrainedAxis')
+                ? namedArgs['constrainedAxis']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1873,7 +2333,7 @@ extension UnconstrainedBoxBinding on UnconstrainedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UnconstrainedBox');
+        return const HTType('UnconstrainedBox');
       case 'textDirection':
         return textDirection;
       case 'alignment':
@@ -1889,33 +2349,47 @@ extension UnconstrainedBoxBinding on UnconstrainedBox {
       case 'hashCode':
         return hashCode;
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1929,12 +2403,18 @@ class FractionallySizedBoxAutoBinding extends HTExternalClass {
       case 'FractionallySizedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => FractionallySizedBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            widthFactor: namedArgs.containsKey('widthFactor') ? namedArgs['widthFactor'] : null,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            widthFactor: namedArgs.containsKey('widthFactor')
+                ? namedArgs['widthFactor']
+                : null,
+            heightFactor: namedArgs.containsKey('heightFactor')
+                ? namedArgs['heightFactor']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1948,7 +2428,7 @@ extension FractionallySizedBoxBinding on FractionallySizedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FractionallySizedBox');
+        return const HTType('FractionallySizedBox');
       case 'widthFactor':
         return widthFactor;
       case 'heightFactor':
@@ -1962,33 +2442,47 @@ extension FractionallySizedBoxBinding on FractionallySizedBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2002,11 +2496,15 @@ class LimitedBoxAutoBinding extends HTExternalClass {
       case 'LimitedBox':
         return ({positionalArgs, namedArgs, typeArgs}) => LimitedBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            maxWidth: namedArgs.containsKey('maxWidth') ? namedArgs['maxWidth'] : double.infinity,
-            maxHeight: namedArgs.containsKey('maxHeight') ? namedArgs['maxHeight'] : double.infinity,
+            maxWidth: namedArgs.containsKey('maxWidth')
+                ? namedArgs['maxWidth']
+                : double.infinity,
+            maxHeight: namedArgs.containsKey('maxHeight')
+                ? namedArgs['maxHeight']
+                : double.infinity,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2020,7 +2518,7 @@ extension LimitedBoxBinding on LimitedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LimitedBox');
+        return const HTType('LimitedBox');
       case 'maxWidth':
         return maxWidth;
       case 'maxHeight':
@@ -2032,33 +2530,47 @@ extension LimitedBoxBinding on LimitedBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2072,14 +2584,24 @@ class OverflowBoxAutoBinding extends HTExternalClass {
       case 'OverflowBox':
         return ({positionalArgs, namedArgs, typeArgs}) => OverflowBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            minWidth: namedArgs.containsKey('minWidth') ? namedArgs['minWidth'] : null,
-            maxWidth: namedArgs.containsKey('maxWidth') ? namedArgs['maxWidth'] : null,
-            minHeight: namedArgs.containsKey('minHeight') ? namedArgs['minHeight'] : null,
-            maxHeight: namedArgs.containsKey('maxHeight') ? namedArgs['maxHeight'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            minWidth: namedArgs.containsKey('minWidth')
+                ? namedArgs['minWidth']
+                : null,
+            maxWidth: namedArgs.containsKey('maxWidth')
+                ? namedArgs['maxWidth']
+                : null,
+            minHeight: namedArgs.containsKey('minHeight')
+                ? namedArgs['minHeight']
+                : null,
+            maxHeight: namedArgs.containsKey('maxHeight')
+                ? namedArgs['maxHeight']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2093,7 +2615,7 @@ extension OverflowBoxBinding on OverflowBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverflowBox');
+        return const HTType('OverflowBox');
       case 'alignment':
         return alignment;
       case 'minWidth':
@@ -2111,33 +2633,47 @@ extension OverflowBoxBinding on OverflowBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2152,10 +2688,12 @@ class SizedOverflowBoxAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SizedOverflowBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             size: namedArgs['size'],
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2169,7 +2707,7 @@ extension SizedOverflowBoxBinding on SizedOverflowBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SizedOverflowBox');
+        return const HTType('SizedOverflowBox');
       case 'alignment':
         return alignment;
       case 'size':
@@ -2181,33 +2719,47 @@ extension SizedOverflowBoxBinding on SizedOverflowBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2221,10 +2773,12 @@ class OffstageAutoBinding extends HTExternalClass {
       case 'Offstage':
         return ({positionalArgs, namedArgs, typeArgs}) => Offstage(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            offstage: namedArgs.containsKey('offstage') ? namedArgs['offstage'] : true,
+            offstage: namedArgs.containsKey('offstage')
+                ? namedArgs['offstage']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2238,7 +2792,7 @@ extension OffstageBinding on Offstage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Offstage');
+        return const HTType('Offstage');
       case 'offstage':
         return offstage;
       case 'child':
@@ -2248,33 +2802,47 @@ extension OffstageBinding on Offstage {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2291,7 +2859,7 @@ class AspectRatioAutoBinding extends HTExternalClass {
             aspectRatio: namedArgs['aspectRatio'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2305,7 +2873,7 @@ extension AspectRatioBinding on AspectRatio {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AspectRatio');
+        return const HTType('AspectRatio');
       case 'aspectRatio':
         return aspectRatio;
       case 'child':
@@ -2315,33 +2883,47 @@ extension AspectRatioBinding on AspectRatio {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2355,11 +2937,15 @@ class IntrinsicWidthAutoBinding extends HTExternalClass {
       case 'IntrinsicWidth':
         return ({positionalArgs, namedArgs, typeArgs}) => IntrinsicWidth(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            stepWidth: namedArgs.containsKey('stepWidth') ? namedArgs['stepWidth'] : null,
-            stepHeight: namedArgs.containsKey('stepHeight') ? namedArgs['stepHeight'] : null,
+            stepWidth: namedArgs.containsKey('stepWidth')
+                ? namedArgs['stepWidth']
+                : null,
+            stepHeight: namedArgs.containsKey('stepHeight')
+                ? namedArgs['stepHeight']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2373,7 +2959,7 @@ extension IntrinsicWidthBinding on IntrinsicWidth {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IntrinsicWidth');
+        return const HTType('IntrinsicWidth');
       case 'stepWidth':
         return stepWidth;
       case 'stepHeight':
@@ -2385,33 +2971,47 @@ extension IntrinsicWidthBinding on IntrinsicWidth {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2427,7 +3027,7 @@ class IntrinsicHeightAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2441,7 +3041,7 @@ extension IntrinsicHeightBinding on IntrinsicHeight {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IntrinsicHeight');
+        return const HTType('IntrinsicHeight');
       case 'child':
         return child;
       case 'key':
@@ -2449,31 +3049,44 @@ extension IntrinsicHeightBinding on IntrinsicHeight {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2491,7 +3104,7 @@ class BaselineAutoBinding extends HTExternalClass {
             baselineType: namedArgs['baselineType'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2505,7 +3118,7 @@ extension BaselineBinding on Baseline {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Baseline');
+        return const HTType('Baseline');
       case 'baseline':
         return baseline;
       case 'baselineType':
@@ -2517,33 +3130,47 @@ extension BaselineBinding on Baseline {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2559,7 +3186,7 @@ class SliverToBoxAdapterAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2573,7 +3200,7 @@ extension SliverToBoxAdapterBinding on SliverToBoxAdapter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverToBoxAdapter');
+        return const HTType('SliverToBoxAdapter');
       case 'child':
         return child;
       case 'key':
@@ -2581,31 +3208,44 @@ extension SliverToBoxAdapterBinding on SliverToBoxAdapter {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2620,9 +3260,10 @@ class SliverPaddingAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SliverPadding(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             padding: namedArgs['padding'],
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2636,7 +3277,7 @@ extension SliverPaddingBinding on SliverPadding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverPadding');
+        return const HTType('SliverPadding');
       case 'padding':
         return padding;
       case 'child':
@@ -2646,33 +3287,47 @@ extension SliverPaddingBinding on SliverPadding {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2686,11 +3341,16 @@ class ListBodyAutoBinding extends HTExternalClass {
       case 'ListBody':
         return ({positionalArgs, namedArgs, typeArgs}) => ListBody(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            mainAxis: namedArgs.containsKey('mainAxis') ? namedArgs['mainAxis'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            mainAxis: namedArgs.containsKey('mainAxis')
+                ? namedArgs['mainAxis']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2704,7 +3364,7 @@ extension ListBodyBinding on ListBody {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListBody');
+        return const HTType('ListBody');
       case 'mainAxis':
         return mainAxis;
       case 'reverse':
@@ -2716,33 +3376,47 @@ extension ListBodyBinding on ListBody {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2756,13 +3430,23 @@ class StackAutoBinding extends HTExternalClass {
       case 'Stack':
         return ({positionalArgs, namedArgs, typeArgs}) => Stack(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : AlignmentDirectional.topStart,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : StackFit.loose,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : AlignmentDirectional.topStart,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            fit: namedArgs.containsKey('fit')
+                ? namedArgs['fit']
+                : StackFit.loose,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2776,7 +3460,7 @@ extension StackBinding on Stack {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Stack');
+        return const HTType('Stack');
       case 'alignment':
         return alignment;
       case 'textDirection':
@@ -2792,33 +3476,47 @@ extension StackBinding on Stack {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2832,13 +3530,21 @@ class IndexedStackAutoBinding extends HTExternalClass {
       case 'IndexedStack':
         return ({positionalArgs, namedArgs, typeArgs}) => IndexedStack(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : AlignmentDirectional.topStart,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            sizing: namedArgs.containsKey('sizing') ? namedArgs['sizing'] : StackFit.loose,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : AlignmentDirectional.topStart,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            sizing: namedArgs.containsKey('sizing')
+                ? namedArgs['sizing']
+                : StackFit.loose,
             index: namedArgs.containsKey('index') ? namedArgs['index'] : 0,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2852,7 +3558,7 @@ extension IndexedStackBinding on IndexedStack {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IndexedStack');
+        return const HTType('IndexedStack');
       case 'index':
         return index;
       case 'alignment':
@@ -2870,33 +3576,47 @@ extension IndexedStackBinding on IndexedStack {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -2913,9 +3633,11 @@ class PositionedAutoBinding extends HTExternalClass {
             left: namedArgs.containsKey('left') ? namedArgs['left'] : null,
             top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
             right: namedArgs.containsKey('right') ? namedArgs['right'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             child: namedArgs['child']);
       case 'Positioned.fromRect':
         return ({positionalArgs, namedArgs, typeArgs}) => Positioned.fromRect(
@@ -2923,10 +3645,11 @@ class PositionedAutoBinding extends HTExternalClass {
             rect: namedArgs['rect'],
             child: namedArgs['child']);
       case 'Positioned.fromRelativeRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => Positioned.fromRelativeRect(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            rect: namedArgs['rect'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Positioned.fromRelativeRect(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                rect: namedArgs['rect'],
+                child: namedArgs['child']);
       case 'Positioned.fill':
         return ({positionalArgs, namedArgs, typeArgs}) => Positioned.fill(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
@@ -2936,18 +3659,25 @@ class PositionedAutoBinding extends HTExternalClass {
             bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : 0.0,
             child: namedArgs['child']);
       case 'Positioned.directional':
-        return ({positionalArgs, namedArgs, typeArgs}) => Positioned.directional(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            textDirection: namedArgs['textDirection'],
-            start: namedArgs.containsKey('start') ? namedArgs['start'] : null,
-            top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
-            width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Positioned.directional(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                textDirection: namedArgs['textDirection'],
+                start:
+                    namedArgs.containsKey('start') ? namedArgs['start'] : null,
+                top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
+                end: namedArgs.containsKey('end') ? namedArgs['end'] : null,
+                bottom: namedArgs.containsKey('bottom')
+                    ? namedArgs['bottom']
+                    : null,
+                width:
+                    namedArgs.containsKey('width') ? namedArgs['width'] : null,
+                height: namedArgs.containsKey('height')
+                    ? namedArgs['height']
+                    : null,
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -2961,7 +3691,7 @@ extension PositionedBinding on Positioned {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Positioned');
+        return const HTType('Positioned');
       case 'left':
         return left;
       case 'top':
@@ -2983,33 +3713,47 @@ extension PositionedBinding on Positioned {
       case 'hashCode':
         return hashCode;
       case 'applyParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyParentData(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugIsValidRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugIsValidRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugIsValidRenderObject(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3026,12 +3770,14 @@ class PositionedDirectionalAutoBinding extends HTExternalClass {
             start: namedArgs.containsKey('start') ? namedArgs['start'] : null,
             top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3045,7 +3791,7 @@ extension PositionedDirectionalBinding on PositionedDirectional {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PositionedDirectional');
+        return const HTType('PositionedDirectional');
       case 'start':
         return start;
       case 'top':
@@ -3065,31 +3811,44 @@ extension PositionedDirectionalBinding on PositionedDirectional {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3104,20 +3863,32 @@ class FlexAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Flex(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             direction: namedArgs['direction'],
-            mainAxisAlignment:
-                namedArgs.containsKey('mainAxisAlignment') ? namedArgs['mainAxisAlignment'] : MainAxisAlignment.start,
-            mainAxisSize: namedArgs.containsKey('mainAxisSize') ? namedArgs['mainAxisSize'] : MainAxisSize.max,
+            mainAxisAlignment: namedArgs.containsKey('mainAxisAlignment')
+                ? namedArgs['mainAxisAlignment']
+                : MainAxisAlignment.start,
+            mainAxisSize: namedArgs.containsKey('mainAxisSize')
+                ? namedArgs['mainAxisSize']
+                : MainAxisSize.max,
             crossAxisAlignment: namedArgs.containsKey('crossAxisAlignment')
                 ? namedArgs['crossAxisAlignment']
                 : CrossAxisAlignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            verticalDirection:
-                namedArgs.containsKey('verticalDirection') ? namedArgs['verticalDirection'] : VerticalDirection.down,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            verticalDirection: namedArgs.containsKey('verticalDirection')
+                ? namedArgs['verticalDirection']
+                : VerticalDirection.down,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3131,7 +3902,7 @@ extension FlexBinding on Flex {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Flex');
+        return const HTType('Flex');
       case 'direction':
         return direction;
       case 'mainAxisAlignment':
@@ -3155,33 +3926,47 @@ extension FlexBinding on Flex {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3195,19 +3980,29 @@ class RowAutoBinding extends HTExternalClass {
       case 'Row':
         return ({positionalArgs, namedArgs, typeArgs}) => Row(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            mainAxisAlignment:
-                namedArgs.containsKey('mainAxisAlignment') ? namedArgs['mainAxisAlignment'] : MainAxisAlignment.start,
-            mainAxisSize: namedArgs.containsKey('mainAxisSize') ? namedArgs['mainAxisSize'] : MainAxisSize.max,
+            mainAxisAlignment: namedArgs.containsKey('mainAxisAlignment')
+                ? namedArgs['mainAxisAlignment']
+                : MainAxisAlignment.start,
+            mainAxisSize: namedArgs.containsKey('mainAxisSize')
+                ? namedArgs['mainAxisSize']
+                : MainAxisSize.max,
             crossAxisAlignment: namedArgs.containsKey('crossAxisAlignment')
                 ? namedArgs['crossAxisAlignment']
                 : CrossAxisAlignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            verticalDirection:
-                namedArgs.containsKey('verticalDirection') ? namedArgs['verticalDirection'] : VerticalDirection.down,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            verticalDirection: namedArgs.containsKey('verticalDirection')
+                ? namedArgs['verticalDirection']
+                : VerticalDirection.down,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3221,7 +4016,7 @@ extension RowBinding on Row {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Row');
+        return const HTType('Row');
       case 'direction':
         return direction;
       case 'mainAxisAlignment':
@@ -3245,33 +4040,47 @@ extension RowBinding on Row {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3285,19 +4094,29 @@ class ColumnAutoBinding extends HTExternalClass {
       case 'Column':
         return ({positionalArgs, namedArgs, typeArgs}) => Column(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            mainAxisAlignment:
-                namedArgs.containsKey('mainAxisAlignment') ? namedArgs['mainAxisAlignment'] : MainAxisAlignment.start,
-            mainAxisSize: namedArgs.containsKey('mainAxisSize') ? namedArgs['mainAxisSize'] : MainAxisSize.max,
+            mainAxisAlignment: namedArgs.containsKey('mainAxisAlignment')
+                ? namedArgs['mainAxisAlignment']
+                : MainAxisAlignment.start,
+            mainAxisSize: namedArgs.containsKey('mainAxisSize')
+                ? namedArgs['mainAxisSize']
+                : MainAxisSize.max,
             crossAxisAlignment: namedArgs.containsKey('crossAxisAlignment')
                 ? namedArgs['crossAxisAlignment']
                 : CrossAxisAlignment.center,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            verticalDirection:
-                namedArgs.containsKey('verticalDirection') ? namedArgs['verticalDirection'] : VerticalDirection.down,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            verticalDirection: namedArgs.containsKey('verticalDirection')
+                ? namedArgs['verticalDirection']
+                : VerticalDirection.down,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3311,7 +4130,7 @@ extension ColumnBinding on Column {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Column');
+        return const HTType('Column');
       case 'direction':
         return direction;
       case 'mainAxisAlignment':
@@ -3335,33 +4154,47 @@ extension ColumnBinding on Column {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3376,10 +4209,11 @@ class FlexibleAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Flexible(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             flex: namedArgs.containsKey('flex') ? namedArgs['flex'] : 1,
-            fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : FlexFit.loose,
+            fit:
+                namedArgs.containsKey('fit') ? namedArgs['fit'] : FlexFit.loose,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3393,7 +4227,7 @@ extension FlexibleBinding on Flexible {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Flexible');
+        return const HTType('Flexible');
       case 'flex':
         return flex;
       case 'fit':
@@ -3407,33 +4241,47 @@ extension FlexibleBinding on Flexible {
       case 'hashCode':
         return hashCode;
       case 'applyParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyParentData(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugIsValidRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugIsValidRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugIsValidRenderObject(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3450,7 +4298,7 @@ class ExpandedAutoBinding extends HTExternalClass {
             flex: namedArgs.containsKey('flex') ? namedArgs['flex'] : 1,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3464,7 +4312,7 @@ extension ExpandedBinding on Expanded {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Expanded');
+        return const HTType('Expanded');
       case 'flex':
         return flex;
       case 'fit':
@@ -3478,33 +4326,47 @@ extension ExpandedBinding on Expanded {
       case 'hashCode':
         return hashCode;
       case 'applyParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyParentData(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugIsValidRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugIsValidRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugIsValidRenderObject(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3518,21 +4380,37 @@ class WrapAutoBinding extends HTExternalClass {
       case 'Wrap':
         return ({positionalArgs, namedArgs, typeArgs}) => Wrap(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            direction: namedArgs.containsKey('direction') ? namedArgs['direction'] : Axis.horizontal,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : WrapAlignment.start,
-            spacing: namedArgs.containsKey('spacing') ? namedArgs['spacing'] : 0.0,
-            runAlignment: namedArgs.containsKey('runAlignment') ? namedArgs['runAlignment'] : WrapAlignment.start,
-            runSpacing: namedArgs.containsKey('runSpacing') ? namedArgs['runSpacing'] : 0.0,
+            direction: namedArgs.containsKey('direction')
+                ? namedArgs['direction']
+                : Axis.horizontal,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : WrapAlignment.start,
+            spacing:
+                namedArgs.containsKey('spacing') ? namedArgs['spacing'] : 0.0,
+            runAlignment: namedArgs.containsKey('runAlignment')
+                ? namedArgs['runAlignment']
+                : WrapAlignment.start,
+            runSpacing: namedArgs.containsKey('runSpacing')
+                ? namedArgs['runSpacing']
+                : 0.0,
             crossAxisAlignment: namedArgs.containsKey('crossAxisAlignment')
                 ? namedArgs['crossAxisAlignment']
                 : WrapCrossAlignment.start,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            verticalDirection:
-                namedArgs.containsKey('verticalDirection') ? namedArgs['verticalDirection'] : VerticalDirection.down,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            verticalDirection: namedArgs.containsKey('verticalDirection')
+                ? namedArgs['verticalDirection']
+                : VerticalDirection.down,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3546,7 +4424,7 @@ extension WrapBinding on Wrap {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Wrap');
+        return const HTType('Wrap');
       case 'direction':
         return direction;
       case 'alignment':
@@ -3572,33 +4450,47 @@ extension WrapBinding on Wrap {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3613,16 +4505,24 @@ class FlowAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Flow(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             delegate: namedArgs['delegate'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       case 'Flow.unwrapped':
         return ({positionalArgs, namedArgs, typeArgs}) => Flow.unwrapped(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             delegate: namedArgs['delegate'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3636,7 +4536,7 @@ extension FlowBinding on Flow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Flow');
+        return const HTType('Flow');
       case 'delegate':
         return delegate;
       case 'clipBehavior':
@@ -3648,33 +4548,47 @@ extension FlowBinding on Flow {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3689,19 +4603,37 @@ class RichTextAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RichText(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             text: namedArgs['text'],
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : true,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : TextOverflow.clip,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textWidthBasis:
-                namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : TextWidthBasis.parent,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null);
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            softWrap: namedArgs.containsKey('softWrap')
+                ? namedArgs['softWrap']
+                : true,
+            overflow: namedArgs.containsKey('overflow')
+                ? namedArgs['overflow']
+                : TextOverflow.clip,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : TextWidthBasis.parent,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3715,7 +4647,7 @@ extension RichTextBinding on RichText {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RichText');
+        return const HTType('RichText');
       case 'text':
         return text;
       case 'textAlign':
@@ -3745,33 +4677,47 @@ extension RichTextBinding on RichText {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3786,22 +4732,41 @@ class RawImageAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RawImage(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            debugImageLabel: namedArgs.containsKey('debugImageLabel') ? namedArgs['debugImageLabel'] : null,
+            debugImageLabel: namedArgs.containsKey('debugImageLabel')
+                ? namedArgs['debugImageLabel']
+                : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            colorBlendMode: namedArgs.containsKey('colorBlendMode') ? namedArgs['colorBlendMode'] : null,
+            colorBlendMode: namedArgs.containsKey('colorBlendMode')
+                ? namedArgs['colorBlendMode']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            invertColors: namedArgs.containsKey('invertColors') ? namedArgs['invertColors'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low,
-            isAntiAlias: namedArgs.containsKey('isAntiAlias') ? namedArgs['isAntiAlias'] : false);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            invertColors: namedArgs.containsKey('invertColors')
+                ? namedArgs['invertColors']
+                : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low,
+            isAntiAlias: namedArgs.containsKey('isAntiAlias')
+                ? namedArgs['isAntiAlias']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3815,7 +4780,7 @@ extension RawImageBinding on RawImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawImage');
+        return const HTType('RawImage');
       case 'image':
         return image;
       case 'debugImageLabel':
@@ -3851,35 +4816,50 @@ extension RawImageBinding on RawImage {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'didUnmountRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUnmountRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUnmountRenderObject(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3896,9 +4876,10 @@ class DefaultAssetBundleAutoBinding extends HTExternalClass {
             bundle: namedArgs['bundle'],
             child: namedArgs['child']);
       case 'DefaultAssetBundle.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultAssetBundle.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultAssetBundle.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3912,7 +4893,7 @@ extension DefaultAssetBundleBinding on DefaultAssetBundle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultAssetBundle');
+        return const HTType('DefaultAssetBundle');
       case 'bundle':
         return bundle;
       case 'child':
@@ -3922,31 +4903,44 @@ extension DefaultAssetBundleBinding on DefaultAssetBundle {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -3958,10 +4952,14 @@ class WidgetToRenderBoxAdapterAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'WidgetToRenderBoxAdapter':
-        return ({positionalArgs, namedArgs, typeArgs}) => WidgetToRenderBoxAdapter(
-            renderBox: namedArgs['renderBox'], onBuild: namedArgs.containsKey('onBuild') ? namedArgs['onBuild'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            WidgetToRenderBoxAdapter(
+                renderBox: namedArgs['renderBox'],
+                onBuild: namedArgs.containsKey('onBuild')
+                    ? namedArgs['onBuild']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -3972,7 +4970,8 @@ class WidgetToRenderBoxAdapterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -3981,7 +4980,7 @@ extension WidgetToRenderBoxAdapterBinding on WidgetToRenderBoxAdapter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WidgetToRenderBoxAdapter');
+        return const HTType('WidgetToRenderBoxAdapter');
       case 'renderBox':
         return renderBox;
       case 'onBuild':
@@ -3991,33 +4990,47 @@ extension WidgetToRenderBoxAdapterBinding on WidgetToRenderBoxAdapter {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4031,16 +5044,30 @@ class ListenerAutoBinding extends HTExternalClass {
       case 'Listener':
         return ({positionalArgs, namedArgs, typeArgs}) => Listener(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onPointerDown: namedArgs.containsKey('onPointerDown') ? namedArgs['onPointerDown'] : null,
-            onPointerMove: namedArgs.containsKey('onPointerMove') ? namedArgs['onPointerMove'] : null,
-            onPointerUp: namedArgs.containsKey('onPointerUp') ? namedArgs['onPointerUp'] : null,
-            onPointerHover: namedArgs.containsKey('onPointerHover') ? namedArgs['onPointerHover'] : null,
-            onPointerCancel: namedArgs.containsKey('onPointerCancel') ? namedArgs['onPointerCancel'] : null,
-            onPointerSignal: namedArgs.containsKey('onPointerSignal') ? namedArgs['onPointerSignal'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : HitTestBehavior.deferToChild,
+            onPointerDown: namedArgs.containsKey('onPointerDown')
+                ? namedArgs['onPointerDown']
+                : null,
+            onPointerMove: namedArgs.containsKey('onPointerMove')
+                ? namedArgs['onPointerMove']
+                : null,
+            onPointerUp: namedArgs.containsKey('onPointerUp')
+                ? namedArgs['onPointerUp']
+                : null,
+            onPointerHover: namedArgs.containsKey('onPointerHover')
+                ? namedArgs['onPointerHover']
+                : null,
+            onPointerCancel: namedArgs.containsKey('onPointerCancel')
+                ? namedArgs['onPointerCancel']
+                : null,
+            onPointerSignal: namedArgs.containsKey('onPointerSignal')
+                ? namedArgs['onPointerSignal']
+                : null,
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : HitTestBehavior.deferToChild,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4051,18 +5078,18 @@ class ListenerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PointerDownEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerMoveEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerUpEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerHoverEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerCancelEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerSignalEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerDownEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerMoveEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerUpEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerHoverEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerCancelEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerSignalEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
     };
   }
 }
@@ -4071,7 +5098,7 @@ extension ListenerBinding on Listener {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Listener');
+        return const HTType('Listener');
       case 'onPointerDown':
         return onPointerDown;
       case 'onPointerMove':
@@ -4093,33 +5120,47 @@ extension ListenerBinding on Listener {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4133,14 +5174,20 @@ class MouseRegionAutoBinding extends HTExternalClass {
       case 'MouseRegion':
         return ({positionalArgs, namedArgs, typeArgs}) => MouseRegion(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onEnter: namedArgs.containsKey('onEnter') ? namedArgs['onEnter'] : null,
-            onExit: namedArgs.containsKey('onExit') ? namedArgs['onExit'] : null,
-            onHover: namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
-            cursor: namedArgs.containsKey('cursor') ? namedArgs['cursor'] : MouseCursor.defer,
-            opaque: namedArgs.containsKey('opaque') ? namedArgs['opaque'] : true,
+            onEnter:
+                namedArgs.containsKey('onEnter') ? namedArgs['onEnter'] : null,
+            onExit:
+                namedArgs.containsKey('onExit') ? namedArgs['onExit'] : null,
+            onHover:
+                namedArgs.containsKey('onHover') ? namedArgs['onHover'] : null,
+            cursor: namedArgs.containsKey('cursor')
+                ? namedArgs['cursor']
+                : MouseCursor.defer,
+            opaque:
+                namedArgs.containsKey('opaque') ? namedArgs['opaque'] : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4151,12 +5198,12 @@ class MouseRegionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PointerEnterEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerExitEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
-      'PointerHoverEventListener': (HTFunction function) =>
-          (event) => function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerEnterEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerExitEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
+      'PointerHoverEventListener': (HTFunction function) => (event) =>
+          function.call(positionalArgs: [event], namedArgs: const {}),
     };
   }
 }
@@ -4165,7 +5212,7 @@ extension MouseRegionBinding on MouseRegion {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MouseRegion');
+        return const HTType('MouseRegion');
       case 'onEnter':
         return onEnter;
       case 'onHover':
@@ -4185,29 +5232,41 @@ extension MouseRegionBinding on MouseRegion {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4223,11 +5282,13 @@ class RepaintBoundaryAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'RepaintBoundary.wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => RepaintBoundary.wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RepaintBoundary.wrap(positionalArgs[0], positionalArgs[1]);
       case 'RepaintBoundary.wrapAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => RepaintBoundary.wrapAll(List<Widget>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RepaintBoundary.wrapAll(List<Widget>.from(positionalArgs[0]));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4241,7 +5302,7 @@ extension RepaintBoundaryBinding on RepaintBoundary {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RepaintBoundary');
+        return const HTType('RepaintBoundary');
       case 'child':
         return child;
       case 'key':
@@ -4249,31 +5310,44 @@ extension RepaintBoundaryBinding on RepaintBoundary {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4287,11 +5361,15 @@ class IgnorePointerAutoBinding extends HTExternalClass {
       case 'IgnorePointer':
         return ({positionalArgs, namedArgs, typeArgs}) => IgnorePointer(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            ignoring: namedArgs.containsKey('ignoring') ? namedArgs['ignoring'] : true,
-            ignoringSemantics: namedArgs.containsKey('ignoringSemantics') ? namedArgs['ignoringSemantics'] : null,
+            ignoring: namedArgs.containsKey('ignoring')
+                ? namedArgs['ignoring']
+                : true,
+            ignoringSemantics: namedArgs.containsKey('ignoringSemantics')
+                ? namedArgs['ignoringSemantics']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4305,7 +5383,7 @@ extension IgnorePointerBinding on IgnorePointer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IgnorePointer');
+        return const HTType('IgnorePointer');
       case 'ignoring':
         return ignoring;
       case 'ignoringSemantics':
@@ -4317,33 +5395,47 @@ extension IgnorePointerBinding on IgnorePointer {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4357,11 +5449,15 @@ class AbsorbPointerAutoBinding extends HTExternalClass {
       case 'AbsorbPointer':
         return ({positionalArgs, namedArgs, typeArgs}) => AbsorbPointer(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            absorbing: namedArgs.containsKey('absorbing') ? namedArgs['absorbing'] : true,
+            absorbing: namedArgs.containsKey('absorbing')
+                ? namedArgs['absorbing']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            ignoringSemantics: namedArgs.containsKey('ignoringSemantics') ? namedArgs['ignoringSemantics'] : null);
+            ignoringSemantics: namedArgs.containsKey('ignoringSemantics')
+                ? namedArgs['ignoringSemantics']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4375,7 +5471,7 @@ extension AbsorbPointerBinding on AbsorbPointer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AbsorbPointer');
+        return const HTType('AbsorbPointer');
       case 'absorbing':
         return absorbing;
       case 'ignoringSemantics':
@@ -4387,33 +5483,47 @@ extension AbsorbPointerBinding on AbsorbPointer {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4427,11 +5537,15 @@ class MetaDataAutoBinding extends HTExternalClass {
       case 'MetaData':
         return ({positionalArgs, namedArgs, typeArgs}) => MetaData(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            metaData: namedArgs.containsKey('metaData') ? namedArgs['metaData'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : HitTestBehavior.deferToChild,
+            metaData: namedArgs.containsKey('metaData')
+                ? namedArgs['metaData']
+                : null,
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : HitTestBehavior.deferToChild,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4445,7 +5559,7 @@ extension MetaDataBinding on MetaData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MetaData');
+        return const HTType('MetaData');
       case 'metaData':
         return metaData;
       case 'behavior':
@@ -4457,33 +5571,47 @@ extension MetaDataBinding on MetaData {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4498,40 +5626,88 @@ class SemanticsAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Semantics(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            container: namedArgs.containsKey('container') ? namedArgs['container'] : false,
-            explicitChildNodes: namedArgs.containsKey('explicitChildNodes') ? namedArgs['explicitChildNodes'] : false,
-            excludeSemantics: namedArgs.containsKey('excludeSemantics') ? namedArgs['excludeSemantics'] : false,
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
-            checked: namedArgs.containsKey('checked') ? namedArgs['checked'] : null,
-            selected: namedArgs.containsKey('selected') ? namedArgs['selected'] : null,
-            toggled: namedArgs.containsKey('toggled') ? namedArgs['toggled'] : null,
-            button: namedArgs.containsKey('button') ? namedArgs['button'] : null,
-            slider: namedArgs.containsKey('slider') ? namedArgs['slider'] : null,
+            container: namedArgs.containsKey('container')
+                ? namedArgs['container']
+                : false,
+            explicitChildNodes: namedArgs.containsKey('explicitChildNodes')
+                ? namedArgs['explicitChildNodes']
+                : false,
+            excludeSemantics: namedArgs.containsKey('excludeSemantics')
+                ? namedArgs['excludeSemantics']
+                : false,
+            enabled:
+                namedArgs.containsKey('enabled') ? namedArgs['enabled'] : null,
+            checked:
+                namedArgs.containsKey('checked') ? namedArgs['checked'] : null,
+            selected: namedArgs.containsKey('selected')
+                ? namedArgs['selected']
+                : null,
+            toggled:
+                namedArgs.containsKey('toggled') ? namedArgs['toggled'] : null,
+            button:
+                namedArgs.containsKey('button') ? namedArgs['button'] : null,
+            slider:
+                namedArgs.containsKey('slider') ? namedArgs['slider'] : null,
             link: namedArgs.containsKey('link') ? namedArgs['link'] : null,
-            header: namedArgs.containsKey('header') ? namedArgs['header'] : null,
-            textField: namedArgs.containsKey('textField') ? namedArgs['textField'] : null,
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : null,
-            focusable: namedArgs.containsKey('focusable') ? namedArgs['focusable'] : null,
-            focused: namedArgs.containsKey('focused') ? namedArgs['focused'] : null,
+            header:
+                namedArgs.containsKey('header') ? namedArgs['header'] : null,
+            textField: namedArgs.containsKey('textField')
+                ? namedArgs['textField']
+                : null,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : null,
+            focusable: namedArgs.containsKey('focusable')
+                ? namedArgs['focusable']
+                : null,
+            focused:
+                namedArgs.containsKey('focused') ? namedArgs['focused'] : null,
             inMutuallyExclusiveGroup:
-                namedArgs.containsKey('inMutuallyExclusiveGroup') ? namedArgs['inMutuallyExclusiveGroup'] : null,
-            obscured: namedArgs.containsKey('obscured') ? namedArgs['obscured'] : null,
-            multiline: namedArgs.containsKey('multiline') ? namedArgs['multiline'] : null,
-            scopesRoute: namedArgs.containsKey('scopesRoute') ? namedArgs['scopesRoute'] : null,
-            namesRoute: namedArgs.containsKey('namesRoute') ? namedArgs['namesRoute'] : null,
-            hidden: namedArgs.containsKey('hidden') ? namedArgs['hidden'] : null,
+                namedArgs.containsKey('inMutuallyExclusiveGroup')
+                    ? namedArgs['inMutuallyExclusiveGroup']
+                    : null,
+            obscured: namedArgs.containsKey('obscured')
+                ? namedArgs['obscured']
+                : null,
+            multiline: namedArgs.containsKey('multiline')
+                ? namedArgs['multiline']
+                : null,
+            scopesRoute: namedArgs.containsKey('scopesRoute')
+                ? namedArgs['scopesRoute']
+                : null,
+            namesRoute: namedArgs.containsKey('namesRoute')
+                ? namedArgs['namesRoute']
+                : null,
+            hidden:
+                namedArgs.containsKey('hidden') ? namedArgs['hidden'] : null,
             image: namedArgs.containsKey('image') ? namedArgs['image'] : null,
-            liveRegion: namedArgs.containsKey('liveRegion') ? namedArgs['liveRegion'] : null,
-            maxValueLength: namedArgs.containsKey('maxValueLength') ? namedArgs['maxValueLength'] : null,
-            currentValueLength: namedArgs.containsKey('currentValueLength') ? namedArgs['currentValueLength'] : null,
+            liveRegion: namedArgs.containsKey('liveRegion')
+                ? namedArgs['liveRegion']
+                : null,
+            maxValueLength: namedArgs.containsKey('maxValueLength')
+                ? namedArgs['maxValueLength']
+                : null,
+            currentValueLength: namedArgs.containsKey('currentValueLength')
+                ? namedArgs['currentValueLength']
+                : null,
             label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
             value: namedArgs.containsKey('value') ? namedArgs['value'] : null,
-            increasedValue: namedArgs.containsKey('increasedValue') ? namedArgs['increasedValue'] : null,
-            decreasedValue: namedArgs.containsKey('decreasedValue') ? namedArgs['decreasedValue'] : null,
+            increasedValue: namedArgs.containsKey('increasedValue')
+                ? namedArgs['increasedValue']
+                : null,
+            decreasedValue: namedArgs.containsKey('decreasedValue')
+                ? namedArgs['decreasedValue']
+                : null,
             hint: namedArgs.containsKey('hint') ? namedArgs['hint'] : null,
-            onTapHint: namedArgs.containsKey('onTapHint') ? namedArgs['onTapHint'] : null,
-            onLongPressHint: namedArgs.containsKey('onLongPressHint') ? namedArgs['onLongPressHint'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            onTapHint: namedArgs.containsKey('onTapHint')
+                ? namedArgs['onTapHint']
+                : null,
+            onLongPressHint: namedArgs.containsKey('onLongPressHint')
+                ? namedArgs['onLongPressHint']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             sortKey: namedArgs.containsKey('sortKey') ? namedArgs['sortKey'] : null,
             tagForChildren: namedArgs.containsKey('tagForChildren') ? namedArgs['tagForChildren'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
@@ -4546,29 +5722,30 @@ class SemanticsAutoBinding extends HTExternalClass {
             onCut: namedArgs.containsKey('onCut') ? namedArgs['onCut'] : null,
             onPaste: namedArgs.containsKey('onPaste') ? namedArgs['onPaste'] : null,
             onDismiss: namedArgs.containsKey('onDismiss') ? namedArgs['onDismiss'] : null,
-            onMoveCursorForwardByCharacter: namedArgs.containsKey('onMoveCursorForwardByCharacter')
-                ? namedArgs['onMoveCursorForwardByCharacter']
-                : null,
-            onMoveCursorBackwardByCharacter: namedArgs.containsKey('onMoveCursorBackwardByCharacter')
-                ? namedArgs['onMoveCursorBackwardByCharacter']
-                : null,
+            onMoveCursorForwardByCharacter: namedArgs.containsKey('onMoveCursorForwardByCharacter') ? namedArgs['onMoveCursorForwardByCharacter'] : null,
+            onMoveCursorBackwardByCharacter: namedArgs.containsKey('onMoveCursorBackwardByCharacter') ? namedArgs['onMoveCursorBackwardByCharacter'] : null,
             onSetSelection: namedArgs.containsKey('onSetSelection') ? namedArgs['onSetSelection'] : null,
-            onDidGainAccessibilityFocus:
-                namedArgs.containsKey('onDidGainAccessibilityFocus') ? namedArgs['onDidGainAccessibilityFocus'] : null,
-            onDidLoseAccessibilityFocus:
-                namedArgs.containsKey('onDidLoseAccessibilityFocus') ? namedArgs['onDidLoseAccessibilityFocus'] : null,
-            customSemanticsActions:
-                namedArgs.containsKey('customSemanticsActions') ? namedArgs['customSemanticsActions'] : null);
+            onDidGainAccessibilityFocus: namedArgs.containsKey('onDidGainAccessibilityFocus') ? namedArgs['onDidGainAccessibilityFocus'] : null,
+            onDidLoseAccessibilityFocus: namedArgs.containsKey('onDidLoseAccessibilityFocus') ? namedArgs['onDidLoseAccessibilityFocus'] : null,
+            customSemanticsActions: namedArgs.containsKey('customSemanticsActions') ? namedArgs['customSemanticsActions'] : null);
       case 'Semantics.fromProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => Semantics.fromProperties(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            container: namedArgs.containsKey('container') ? namedArgs['container'] : false,
-            explicitChildNodes: namedArgs.containsKey('explicitChildNodes') ? namedArgs['explicitChildNodes'] : false,
-            excludeSemantics: namedArgs.containsKey('excludeSemantics') ? namedArgs['excludeSemantics'] : false,
-            properties: namedArgs['properties']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Semantics.fromProperties(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null,
+                container: namedArgs.containsKey('container')
+                    ? namedArgs['container']
+                    : false,
+                explicitChildNodes: namedArgs.containsKey('explicitChildNodes')
+                    ? namedArgs['explicitChildNodes']
+                    : false,
+                excludeSemantics: namedArgs.containsKey('excludeSemantics')
+                    ? namedArgs['excludeSemantics']
+                    : false,
+                properties: namedArgs['properties']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4579,11 +5756,12 @@ class SemanticsAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'MoveCursorHandler': (HTFunction function) =>
-          (extendSelection) => function.call(positionalArgs: [extendSelection], namedArgs: const {}),
-      'SetSelectionHandler': (HTFunction function) =>
-          (selection) => function.call(positionalArgs: [selection], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'MoveCursorHandler': (HTFunction function) => (extendSelection) =>
+          function.call(positionalArgs: [extendSelection], namedArgs: const {}),
+      'SetSelectionHandler': (HTFunction function) => (selection) =>
+          function.call(positionalArgs: [selection], namedArgs: const {}),
     };
   }
 }
@@ -4592,7 +5770,7 @@ extension SemanticsBinding on Semantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Semantics');
+        return const HTType('Semantics');
       case 'properties':
         return properties;
       case 'container':
@@ -4608,33 +5786,47 @@ extension SemanticsBinding on Semantics {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4650,7 +5842,7 @@ class MergeSemanticsAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4664,7 +5856,7 @@ extension MergeSemanticsBinding on MergeSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MergeSemantics');
+        return const HTType('MergeSemantics');
       case 'child':
         return child;
       case 'key':
@@ -4672,31 +5864,44 @@ extension MergeSemanticsBinding on MergeSemantics {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4710,10 +5915,12 @@ class BlockSemanticsAutoBinding extends HTExternalClass {
       case 'BlockSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => BlockSemantics(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            blocking: namedArgs.containsKey('blocking') ? namedArgs['blocking'] : true,
+            blocking: namedArgs.containsKey('blocking')
+                ? namedArgs['blocking']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4727,7 +5934,7 @@ extension BlockSemanticsBinding on BlockSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BlockSemantics');
+        return const HTType('BlockSemantics');
       case 'blocking':
         return blocking;
       case 'child':
@@ -4737,33 +5944,47 @@ extension BlockSemanticsBinding on BlockSemantics {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4777,10 +5998,12 @@ class ExcludeSemanticsAutoBinding extends HTExternalClass {
       case 'ExcludeSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => ExcludeSemantics(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            excluding: namedArgs.containsKey('excluding') ? namedArgs['excluding'] : true,
+            excluding: namedArgs.containsKey('excluding')
+                ? namedArgs['excluding']
+                : true,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4794,7 +6017,7 @@ extension ExcludeSemanticsBinding on ExcludeSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExcludeSemantics');
+        return const HTType('ExcludeSemantics');
       case 'excluding':
         return excluding;
       case 'child':
@@ -4804,33 +6027,47 @@ extension ExcludeSemanticsBinding on ExcludeSemantics {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4847,7 +6084,7 @@ class IndexedSemanticsAutoBinding extends HTExternalClass {
             index: namedArgs['index'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4861,7 +6098,7 @@ extension IndexedSemanticsBinding on IndexedSemantics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IndexedSemantics');
+        return const HTType('IndexedSemantics');
       case 'index':
         return index;
       case 'child':
@@ -4871,33 +6108,47 @@ extension IndexedSemanticsBinding on IndexedSemantics {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4909,16 +6160,21 @@ class KeyedSubtreeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'KeyedSubtree':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            KeyedSubtree(key: namedArgs.containsKey('key') ? namedArgs['key'] : null, child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) => KeyedSubtree(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            child: namedArgs['child']);
       case 'KeyedSubtree.wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => KeyedSubtree.wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            KeyedSubtree.wrap(positionalArgs[0], positionalArgs[1]);
       case 'KeyedSubtree.ensureUniqueKeysForList':
-        return ({positionalArgs, namedArgs, typeArgs}) => KeyedSubtree.ensureUniqueKeysForList(
-            List<Widget>.from(positionalArgs[0]),
-            baseIndex: namedArgs.containsKey('baseIndex') ? namedArgs['baseIndex'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            KeyedSubtree.ensureUniqueKeysForList(
+                List<Widget>.from(positionalArgs[0]),
+                baseIndex: namedArgs.containsKey('baseIndex')
+                    ? namedArgs['baseIndex']
+                    : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4932,7 +6188,7 @@ extension KeyedSubtreeBinding on KeyedSubtree {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('KeyedSubtree');
+        return const HTType('KeyedSubtree');
       case 'child':
         return child;
       case 'key':
@@ -4940,31 +6196,44 @@ extension KeyedSubtreeBinding on KeyedSubtree {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -4976,10 +6245,11 @@ class BuilderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Builder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Builder(key: namedArgs.containsKey('key') ? namedArgs['key'] : null, builder: namedArgs['builder']);
+        return ({positionalArgs, namedArgs, typeArgs}) => Builder(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            builder: namedArgs['builder']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -4990,8 +6260,8 @@ class BuilderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'WidgetBuilder': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as Widget,
+      'WidgetBuilder': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as Widget,
     };
   }
 }
@@ -5000,7 +6270,7 @@ extension BuilderBinding on Builder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Builder');
+        return const HTType('Builder');
       case 'builder':
         return builder;
       case 'key':
@@ -5008,31 +6278,44 @@ extension BuilderBinding on Builder {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -5044,10 +6327,11 @@ class StatefulBuilderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StatefulBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            StatefulBuilder(key: namedArgs.containsKey('key') ? namedArgs['key'] : null, builder: namedArgs['builder']);
+        return ({positionalArgs, namedArgs, typeArgs}) => StatefulBuilder(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            builder: namedArgs['builder']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5058,8 +6342,10 @@ class StatefulBuilderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'StatefulWidgetBuilder': (HTFunction function) =>
-          (context, setState) => function.call(positionalArgs: [context, setState], namedArgs: const {}) as Widget,
+      'StatefulWidgetBuilder': (HTFunction function) => (context, setState) =>
+          function.call(
+              positionalArgs: [context, setState],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -5068,7 +6354,7 @@ extension StatefulBuilderBinding on StatefulBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StatefulBuilder');
+        return const HTType('StatefulBuilder');
       case 'builder':
         return builder;
       case 'key':
@@ -5082,25 +6368,37 @@ extension StatefulBuilderBinding on StatefulBuilder {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -5117,7 +6415,7 @@ class ColoredBoxAutoBinding extends HTExternalClass {
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -5131,7 +6429,7 @@ extension ColoredBoxBinding on ColoredBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ColoredBox');
+        return const HTType('ColoredBox');
       case 'color':
         return color;
       case 'child':
@@ -5141,33 +6439,47 @@ extension ColoredBoxBinding on ColoredBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/binding.g.dart b/lib/bindings/flutter/widgets/binding.g.dart
index 82302e9..04d2ae6 100644
--- a/lib/bindings/flutter/widgets/binding.g.dart
+++ b/lib/bindings/flutter/widgets/binding.g.dart
@@ -10,11 +10,13 @@ class WidgetsFlutterBindingAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'WidgetsFlutterBinding':
-        return ({positionalArgs, namedArgs, typeArgs}) => WidgetsFlutterBinding();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            WidgetsFlutterBinding();
       case 'WidgetsFlutterBinding.ensureInitialized':
-        return ({positionalArgs, namedArgs, typeArgs}) => WidgetsFlutterBinding.ensureInitialized();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            WidgetsFlutterBinding.ensureInitialized();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,10 +27,10 @@ class WidgetsFlutterBindingAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TimingsCallback': (HTFunction function) =>
-          (timings) => function.call(positionalArgs: [timings], namedArgs: const {}),
-      'FrameCallback': (HTFunction function) =>
-          (timeStamp) => function.call(positionalArgs: [timeStamp], namedArgs: const {}),
+      'TimingsCallback': (HTFunction function) => (timings) =>
+          function.call(positionalArgs: [timings], namedArgs: const {}),
+      'FrameCallback': (HTFunction function) => (timeStamp) =>
+          function.call(positionalArgs: [timeStamp], namedArgs: const {}),
     };
   }
 }
@@ -37,7 +39,7 @@ extension WidgetsFlutterBindingBinding on WidgetsFlutterBinding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WidgetsFlutterBinding');
+        return const HTType('WidgetsFlutterBinding');
       case 'lifecycleState':
         return lifecycleState;
       case 'transientCallbackCount':
@@ -95,36 +97,54 @@ extension WidgetsFlutterBindingBinding on WidgetsFlutterBinding {
       case 'unlocked':
         return ({positionalArgs, namedArgs, typeArgs}) => unlocked();
       case 'cancelPointer':
-        return ({positionalArgs, namedArgs, typeArgs}) => cancelPointer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            cancelPointer(positionalArgs[0]);
       case 'handlePointerEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handlePointerEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handlePointerEvent(positionalArgs[0]);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTest(positionalArgs[0], positionalArgs[1]);
       case 'dispatchEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatchEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatchEvent(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'addTimingsCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addTimingsCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addTimingsCallback(positionalArgs[0]);
       case 'removeTimingsCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeTimingsCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeTimingsCallback(positionalArgs[0]);
       case 'initServiceExtensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => initServiceExtensions();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initServiceExtensions();
       case 'scheduleTask':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleTask(positionalArgs[0], positionalArgs[1],
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => scheduleTask(
+            positionalArgs[0], positionalArgs[1],
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
             flow: namedArgs.containsKey('flow') ? namedArgs['flow'] : null);
       case 'scheduleFrameCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleFrameCallback(positionalArgs[0],
-            rescheduling: namedArgs.containsKey('rescheduling') ? namedArgs['rescheduling'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => scheduleFrameCallback(
+            positionalArgs[0],
+            rescheduling: namedArgs.containsKey('rescheduling')
+                ? namedArgs['rescheduling']
+                : false);
       case 'cancelFrameCallbackWithId':
-        return ({positionalArgs, namedArgs, typeArgs}) => cancelFrameCallbackWithId(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            cancelFrameCallbackWithId(positionalArgs[0]);
       case 'debugAssertNoTransientCallbacks':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertNoTransientCallbacks(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertNoTransientCallbacks(positionalArgs[0]);
       case 'addPersistentFrameCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPersistentFrameCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPersistentFrameCallback(positionalArgs[0]);
       case 'addPostFrameCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addPostFrameCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addPostFrameCallback(positionalArgs[0]);
       case 'ensureVisualUpdate':
         return ({positionalArgs, namedArgs, typeArgs}) => ensureVisualUpdate();
       case 'scheduleFrame':
@@ -136,22 +156,33 @@ extension WidgetsFlutterBindingBinding on WidgetsFlutterBinding {
       case 'resetEpoch':
         return ({positionalArgs, namedArgs, typeArgs}) => resetEpoch();
       case 'handleBeginFrame':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleBeginFrame(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleBeginFrame(positionalArgs[0]);
       case 'handleDrawFrame':
         return ({positionalArgs, namedArgs, typeArgs}) => handleDrawFrame();
       case 'instantiateImageCodec':
-        return ({positionalArgs, namedArgs, typeArgs}) => instantiateImageCodec(positionalArgs[0],
-            targetWidth: namedArgs.containsKey('cacheWidth') ? namedArgs['cacheWidth'] : null,
-            targetHeight: namedArgs.containsKey('cacheHeight') ? namedArgs['cacheHeight'] : null,
-            allowUpscaling: namedArgs.containsKey('allowUpscaling') ? namedArgs['allowUpscaling'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => instantiateImageCodec(
+            positionalArgs[0],
+            targetWidth: namedArgs.containsKey('cacheWidth')
+                ? namedArgs['cacheWidth']
+                : null,
+            targetHeight: namedArgs.containsKey('cacheHeight')
+                ? namedArgs['cacheHeight']
+                : null,
+            allowUpscaling: namedArgs.containsKey('allowUpscaling')
+                ? namedArgs['allowUpscaling']
+                : false);
       case 'createSemanticsUpdateBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => createSemanticsUpdateBuilder();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createSemanticsUpdateBuilder();
       case 'initRenderView':
         return ({positionalArgs, namedArgs, typeArgs}) => initRenderView();
       case 'createViewConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => createViewConfiguration();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createViewConfiguration();
       case 'setSemanticsEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => setSemanticsEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setSemanticsEnabled(positionalArgs[0]);
       case 'deferFirstFrame':
         return ({positionalArgs, namedArgs, typeArgs}) => deferFirstFrame();
       case 'allowFirstFrame':
@@ -161,20 +192,24 @@ extension WidgetsFlutterBindingBinding on WidgetsFlutterBinding {
       case 'performReassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => performReassemble();
       case 'addObserver':
-        return ({positionalArgs, namedArgs, typeArgs}) => addObserver(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addObserver(positionalArgs[0]);
       case 'removeObserver':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeObserver(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeObserver(positionalArgs[0]);
       case 'attachRootWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRootWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRootWidget(positionalArgs[0]);
       case 'computePlatformResolvedLocale':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             computePlatformResolvedLocale(List<Locale>.from(positionalArgs[0]));
       case 'reassembleApplication':
-        return ({positionalArgs, namedArgs, typeArgs}) => reassembleApplication();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            reassembleApplication();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/bottom_navigation_bar_item.g.dart b/lib/bindings/flutter/widgets/bottom_navigation_bar_item.g.dart
index e6be606..7cb1789 100644
--- a/lib/bindings/flutter/widgets/bottom_navigation_bar_item.g.dart
+++ b/lib/bindings/flutter/widgets/bottom_navigation_bar_item.g.dart
@@ -8,14 +8,22 @@ class BottomNavigationBarItemAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BottomNavigationBarItem':
-        return ({positionalArgs, namedArgs, typeArgs}) => BottomNavigationBarItem(
-            icon: namedArgs['icon'],
-            label: namedArgs.containsKey('label') ? namedArgs['label'] : null,
-            activeIcon: namedArgs.containsKey('activeIcon') ? namedArgs['activeIcon'] : null,
-            backgroundColor: namedArgs.containsKey('backgroundColor') ? namedArgs['backgroundColor'] : null,
-            tooltip: namedArgs.containsKey('tooltip') ? namedArgs['tooltip'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BottomNavigationBarItem(
+                icon: namedArgs['icon'],
+                label:
+                    namedArgs.containsKey('label') ? namedArgs['label'] : null,
+                activeIcon: namedArgs.containsKey('activeIcon')
+                    ? namedArgs['activeIcon']
+                    : null,
+                backgroundColor: namedArgs.containsKey('backgroundColor')
+                    ? namedArgs['backgroundColor']
+                    : null,
+                tooltip: namedArgs.containsKey('tooltip')
+                    ? namedArgs['tooltip']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +37,7 @@ extension BottomNavigationBarItemBinding on BottomNavigationBarItem {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BottomNavigationBarItem');
+        return const HTType('BottomNavigationBarItem');
       case 'icon':
         return icon;
       case 'activeIcon':
@@ -41,7 +49,7 @@ extension BottomNavigationBarItemBinding on BottomNavigationBarItem {
       case 'tooltip':
         return tooltip;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/color_filter.g.dart b/lib/bindings/flutter/widgets/color_filter.g.dart
index eb5c3c3..f8ebf1c 100644
--- a/lib/bindings/flutter/widgets/color_filter.g.dart
+++ b/lib/bindings/flutter/widgets/color_filter.g.dart
@@ -15,7 +15,7 @@ class ColorFilteredAutoBinding extends HTExternalClass {
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +29,7 @@ extension ColorFilteredBinding on ColorFiltered {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ColorFiltered');
+        return const HTType('ColorFiltered');
       case 'colorFilter':
         return colorFilter;
       case 'child':
@@ -39,33 +39,47 @@ extension ColorFilteredBinding on ColorFiltered {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/container.g.dart b/lib/bindings/flutter/widgets/container.g.dart
index 09aed22..1b3a450 100644
--- a/lib/bindings/flutter/widgets/container.g.dart
+++ b/lib/bindings/flutter/widgets/container.g.dart
@@ -13,10 +13,12 @@ class DecoratedBoxAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => DecoratedBox(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             decoration: namedArgs['decoration'],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : DecorationPosition.background,
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : DecorationPosition.background,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +32,7 @@ extension DecoratedBoxBinding on DecoratedBox {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DecoratedBox');
+        return const HTType('DecoratedBox');
       case 'decoration':
         return decoration;
       case 'position':
@@ -42,33 +44,47 @@ extension DecoratedBoxBinding on DecoratedBox {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -82,22 +98,38 @@ class ContainerAutoBinding extends HTExternalClass {
       case 'Container':
         return ({positionalArgs, namedArgs, typeArgs}) => Container(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            foregroundDecoration:
-                namedArgs.containsKey('foregroundDecoration') ? namedArgs['foregroundDecoration'] : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            foregroundDecoration: namedArgs.containsKey('foregroundDecoration')
+                ? namedArgs['foregroundDecoration']
+                : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            constraints: namedArgs.containsKey('constraints') ? namedArgs['constraints'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            transformAlignment: namedArgs.containsKey('transformAlignment') ? namedArgs['transformAlignment'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            constraints: namedArgs.containsKey('constraints')
+                ? namedArgs['constraints']
+                : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
+            transformAlignment: namedArgs.containsKey('transformAlignment')
+                ? namedArgs['transformAlignment']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -111,7 +143,7 @@ extension ContainerBinding on Container {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Container');
+        return const HTType('Container');
       case 'child':
         return child;
       case 'alignment':
@@ -139,31 +171,44 @@ extension ContainerBinding on Container {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/desktop_text_selection_toolbar_layout_delegate.g.dart b/lib/bindings/flutter/widgets/desktop_text_selection_toolbar_layout_delegate.g.dart
index 26a0a22..c921663 100644
--- a/lib/bindings/flutter/widgets/desktop_text_selection_toolbar_layout_delegate.g.dart
+++ b/lib/bindings/flutter/widgets/desktop_text_selection_toolbar_layout_delegate.g.dart
@@ -1,17 +1,20 @@
 import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/widgets.dart';
 
-class DesktopTextSelectionToolbarLayoutDelegateAutoBinding extends HTExternalClass {
-  DesktopTextSelectionToolbarLayoutDelegateAutoBinding() : super('DesktopTextSelectionToolbarLayoutDelegate');
+class DesktopTextSelectionToolbarLayoutDelegateAutoBinding
+    extends HTExternalClass {
+  DesktopTextSelectionToolbarLayoutDelegateAutoBinding()
+      : super('DesktopTextSelectionToolbarLayoutDelegate');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DesktopTextSelectionToolbarLayoutDelegate':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            DesktopTextSelectionToolbarLayoutDelegate(anchor: namedArgs['anchor']);
+            DesktopTextSelectionToolbarLayoutDelegate(
+                anchor: namedArgs['anchor']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,23 +24,28 @@ class DesktopTextSelectionToolbarLayoutDelegateAutoBinding extends HTExternalCla
   }
 }
 
-extension DesktopTextSelectionToolbarLayoutDelegateBinding on DesktopTextSelectionToolbarLayoutDelegate {
+extension DesktopTextSelectionToolbarLayoutDelegateBinding
+    on DesktopTextSelectionToolbarLayoutDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DesktopTextSelectionToolbarLayoutDelegate');
+        return const HTType('DesktopTextSelectionToolbarLayoutDelegate');
       case 'anchor':
         return anchor;
       case 'getConstraintsForChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => getConstraintsForChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getConstraintsForChild(positionalArgs[0]);
       case 'getPositionForChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPositionForChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPositionForChild(positionalArgs[0], positionalArgs[1]);
       case 'shouldRelayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRelayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRelayout(positionalArgs[0]);
       case 'getSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getSize(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/dismissible.g.dart b/lib/bindings/flutter/widgets/dismissible.g.dart
index 785a94a..d566942 100644
--- a/lib/bindings/flutter/widgets/dismissible.g.dart
+++ b/lib/bindings/flutter/widgets/dismissible.g.dart
@@ -25,7 +25,7 @@ class DismissDirectionAutoBinding extends HTExternalClass {
       case 'DismissDirection.none':
         return DismissDirection.none;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,13 +33,14 @@ class DismissDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DismissDirection');
+        return const HTType('DismissDirection');
       case 'index':
         return (instance as DismissDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DismissDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DismissDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,12 +55,24 @@ class DismissibleAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Dismissible(
             key: namedArgs['key'],
             child: namedArgs['child'],
-            background: namedArgs.containsKey('background') ? namedArgs['background'] : null,
-            secondaryBackground: namedArgs.containsKey('secondaryBackground') ? namedArgs['secondaryBackground'] : null,
-            confirmDismiss: namedArgs.containsKey('confirmDismiss') ? namedArgs['confirmDismiss'] : null,
-            onResize: namedArgs.containsKey('onResize') ? namedArgs['onResize'] : null,
-            onDismissed: namedArgs.containsKey('onDismissed') ? namedArgs['onDismissed'] : null,
-            direction: namedArgs.containsKey('direction') ? namedArgs['direction'] : DismissDirection.horizontal,
+            background: namedArgs.containsKey('background')
+                ? namedArgs['background']
+                : null,
+            secondaryBackground: namedArgs.containsKey('secondaryBackground')
+                ? namedArgs['secondaryBackground']
+                : null,
+            confirmDismiss: namedArgs.containsKey('confirmDismiss')
+                ? namedArgs['confirmDismiss']
+                : null,
+            onResize: namedArgs.containsKey('onResize')
+                ? namedArgs['onResize']
+                : null,
+            onDismissed: namedArgs.containsKey('onDismissed')
+                ? namedArgs['onDismissed']
+                : null,
+            direction: namedArgs.containsKey('direction')
+                ? namedArgs['direction']
+                : DismissDirection.horizontal,
             resizeDuration: namedArgs.containsKey('resizeDuration')
                 ? namedArgs['resizeDuration']
                 : const Duration(milliseconds: 300),
@@ -69,12 +82,17 @@ class DismissibleAutoBinding extends HTExternalClass {
             movementDuration: namedArgs.containsKey('movementDuration')
                 ? namedArgs['movementDuration']
                 : const Duration(milliseconds: 200),
-            crossAxisEndOffset: namedArgs.containsKey('crossAxisEndOffset') ? namedArgs['crossAxisEndOffset'] : 0.0,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : HitTestBehavior.opaque);
+            crossAxisEndOffset: namedArgs.containsKey('crossAxisEndOffset')
+                ? namedArgs['crossAxisEndOffset']
+                : 0.0,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : HitTestBehavior.opaque);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -85,11 +103,13 @@ class DismissibleAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ConfirmDismissCallback': (HTFunction function) =>
-          (direction) => function.call(positionalArgs: [direction], namedArgs: const {}) as Future<bool?>,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'DismissDirectionCallback': (HTFunction function) =>
-          (direction) => function.call(positionalArgs: [direction], namedArgs: const {}),
+      'ConfirmDismissCallback': (HTFunction function) => (direction) =>
+          function.call(positionalArgs: [direction], namedArgs: const {})
+              as Future<bool?>,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'DismissDirectionCallback': (HTFunction function) => (direction) =>
+          function.call(positionalArgs: [direction], namedArgs: const {}),
     };
   }
 }
@@ -98,7 +118,7 @@ extension DismissibleBinding on Dismissible {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Dismissible');
+        return const HTType('Dismissible');
       case 'child':
         return child;
       case 'background':
@@ -136,25 +156,37 @@ extension DismissibleBinding on Dismissible {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/drag_target.g.dart b/lib/bindings/flutter/widgets/drag_target.g.dart
index 478493b..b8a2fce 100644
--- a/lib/bindings/flutter/widgets/drag_target.g.dart
+++ b/lib/bindings/flutter/widgets/drag_target.g.dart
@@ -14,7 +14,7 @@ class DragAnchorAutoBinding extends HTExternalClass {
       case 'DragAnchor.pointer':
         return DragAnchor.pointer;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,13 +22,14 @@ class DragAnchorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DragAnchor');
+        return const HTType('DragAnchor');
       case 'index':
         return (instance as DragAnchor).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as DragAnchor).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as DragAnchor).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -41,11 +42,13 @@ class DraggableDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'DraggableDetails':
         return ({positionalArgs, namedArgs, typeArgs}) => DraggableDetails(
-            wasAccepted: namedArgs.containsKey('wasAccepted') ? namedArgs['wasAccepted'] : false,
+            wasAccepted: namedArgs.containsKey('wasAccepted')
+                ? namedArgs['wasAccepted']
+                : false,
             velocity: namedArgs['velocity'],
             offset: namedArgs['offset']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -59,7 +62,7 @@ extension DraggableDetailsBinding on DraggableDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DraggableDetails');
+        return const HTType('DraggableDetails');
       case 'wasAccepted':
         return wasAccepted;
       case 'velocity':
@@ -67,7 +70,7 @@ extension DraggableDetailsBinding on DraggableDetails {
       case 'offset':
         return offset;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/draggable_scrollable_sheet.g.dart b/lib/bindings/flutter/widgets/draggable_scrollable_sheet.g.dart
index ad25fb0..7fcc544 100644
--- a/lib/bindings/flutter/widgets/draggable_scrollable_sheet.g.dart
+++ b/lib/bindings/flutter/widgets/draggable_scrollable_sheet.g.dart
@@ -9,15 +9,24 @@ class DraggableScrollableSheetAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DraggableScrollableSheet':
-        return ({positionalArgs, namedArgs, typeArgs}) => DraggableScrollableSheet(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            initialChildSize: namedArgs.containsKey('initialChildSize') ? namedArgs['initialChildSize'] : 0.5,
-            minChildSize: namedArgs.containsKey('minChildSize') ? namedArgs['minChildSize'] : 0.25,
-            maxChildSize: namedArgs.containsKey('maxChildSize') ? namedArgs['maxChildSize'] : 1.0,
-            expand: namedArgs.containsKey('expand') ? namedArgs['expand'] : true,
-            builder: namedArgs['builder']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DraggableScrollableSheet(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                initialChildSize: namedArgs.containsKey('initialChildSize')
+                    ? namedArgs['initialChildSize']
+                    : 0.5,
+                minChildSize: namedArgs.containsKey('minChildSize')
+                    ? namedArgs['minChildSize']
+                    : 0.25,
+                maxChildSize: namedArgs.containsKey('maxChildSize')
+                    ? namedArgs['maxChildSize']
+                    : 1.0,
+                expand: namedArgs.containsKey('expand')
+                    ? namedArgs['expand']
+                    : true,
+                builder: namedArgs['builder']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,8 +37,10 @@ class DraggableScrollableSheetAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ScrollableWidgetBuilder': (HTFunction function) => (context, scrollController) =>
-          function.call(positionalArgs: [context, scrollController], namedArgs: const {}) as Widget,
+      'ScrollableWidgetBuilder': (HTFunction function) =>
+          (context, scrollController) => function.call(
+              positionalArgs: [context, scrollController],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -38,7 +49,7 @@ extension DraggableScrollableSheetBinding on DraggableScrollableSheet {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DraggableScrollableSheet');
+        return const HTType('DraggableScrollableSheet');
       case 'initialChildSize':
         return initialChildSize;
       case 'minChildSize':
@@ -60,44 +71,58 @@ extension DraggableScrollableSheetBinding on DraggableScrollableSheet {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DraggableScrollableNotificationAutoBinding extends HTExternalClass {
-  DraggableScrollableNotificationAutoBinding() : super('DraggableScrollableNotification');
+  DraggableScrollableNotificationAutoBinding()
+      : super('DraggableScrollableNotification');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DraggableScrollableNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => DraggableScrollableNotification(
-            extent: namedArgs['extent'],
-            minExtent: namedArgs['minExtent'],
-            maxExtent: namedArgs['maxExtent'],
-            initialExtent: namedArgs['initialExtent'],
-            context: namedArgs['context']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DraggableScrollableNotification(
+                extent: namedArgs['extent'],
+                minExtent: namedArgs['minExtent'],
+                maxExtent: namedArgs['maxExtent'],
+                initialExtent: namedArgs['initialExtent'],
+                context: namedArgs['context']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -107,11 +132,12 @@ class DraggableScrollableNotificationAutoBinding extends HTExternalClass {
   }
 }
 
-extension DraggableScrollableNotificationBinding on DraggableScrollableNotification {
+extension DraggableScrollableNotificationBinding
+    on DraggableScrollableNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DraggableScrollableNotification');
+        return const HTType('DraggableScrollableNotification');
       case 'extent':
         return extent;
       case 'minExtent':
@@ -125,32 +151,39 @@ extension DraggableScrollableNotificationBinding on DraggableScrollableNotificat
       case 'depth':
         return depth;
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'visitAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestor(positionalArgs[0]);
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DraggableScrollableActuatorAutoBinding extends HTExternalClass {
-  DraggableScrollableActuatorAutoBinding() : super('DraggableScrollableActuator');
+  DraggableScrollableActuatorAutoBinding()
+      : super('DraggableScrollableActuator');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DraggableScrollableActuator':
-        return ({positionalArgs, namedArgs, typeArgs}) => DraggableScrollableActuator(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null, child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DraggableScrollableActuator(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child']);
       case 'DraggableScrollableActuator.reset':
-        return ({positionalArgs, namedArgs, typeArgs}) => DraggableScrollableActuator.reset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DraggableScrollableActuator.reset(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -164,7 +197,7 @@ extension DraggableScrollableActuatorBinding on DraggableScrollableActuator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DraggableScrollableActuator');
+        return const HTType('DraggableScrollableActuator');
       case 'child':
         return child;
       case 'key':
@@ -172,31 +205,44 @@ extension DraggableScrollableActuatorBinding on DraggableScrollableActuator {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/dual_transition_builder.g.dart b/lib/bindings/flutter/widgets/dual_transition_builder.g.dart
index fce2c28..b710e17 100644
--- a/lib/bindings/flutter/widgets/dual_transition_builder.g.dart
+++ b/lib/bindings/flutter/widgets/dual_transition_builder.g.dart
@@ -15,7 +15,7 @@ class DualTransitionBuilderAutoBinding extends HTExternalClass {
             reverseBuilder: namedArgs['reverseBuilder'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,8 +26,10 @@ class DualTransitionBuilderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'AnimatedTransitionBuilder': (HTFunction function) => (context, animation, child) =>
-          function.call(positionalArgs: [context, animation, child], namedArgs: const {}) as Widget,
+      'AnimatedTransitionBuilder': (HTFunction function) =>
+          (context, animation, child) => function.call(
+              positionalArgs: [context, animation, child],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -36,7 +38,7 @@ extension DualTransitionBuilderBinding on DualTransitionBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DualTransitionBuilder');
+        return const HTType('DualTransitionBuilder');
       case 'animation':
         return animation;
       case 'forwardBuilder':
@@ -56,25 +58,37 @@ extension DualTransitionBuilderBinding on DualTransitionBuilder {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/editable_text.g.dart b/lib/bindings/flutter/widgets/editable_text.g.dart
index 5004277..eb4fc63 100644
--- a/lib/bindings/flutter/widgets/editable_text.g.dart
+++ b/lib/bindings/flutter/widgets/editable_text.g.dart
@@ -13,12 +13,13 @@ class TextEditingControllerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextEditingController':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextEditingController(text: namedArgs.containsKey('text') ? namedArgs['text'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => TextEditingController(
+            text: namedArgs.containsKey('text') ? namedArgs['text'] : null);
       case 'TextEditingController.fromValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextEditingController.fromValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextEditingController.fromValue(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +35,8 @@ class TextEditingControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -43,7 +45,7 @@ extension TextEditingControllerBinding on TextEditingController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextEditingController');
+        return const HTType('TextEditingController');
       case 'text':
         return text;
       case 'selection':
@@ -51,23 +53,28 @@ extension TextEditingControllerBinding on TextEditingController {
       case 'buildTextSpan':
         return ({positionalArgs, namedArgs, typeArgs}) => buildTextSpan(
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            withComposing: namedArgs.containsKey('withComposing') ? namedArgs['withComposing'] : null);
+            withComposing: namedArgs.containsKey('withComposing')
+                ? namedArgs['withComposing']
+                : null);
       case 'clear':
         return ({positionalArgs, namedArgs, typeArgs}) => clear();
       case 'clearComposing':
         return ({positionalArgs, namedArgs, typeArgs}) => clearComposing();
       case 'isSelectionWithinTextBounds':
-        return ({positionalArgs, namedArgs, typeArgs}) => isSelectionWithinTextBounds(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isSelectionWithinTextBounds(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -83,7 +90,7 @@ extension TextEditingControllerBinding on TextEditingController {
         selection = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -99,9 +106,11 @@ class ToolbarOptionsAutoBinding extends HTExternalClass {
             copy: namedArgs.containsKey('copy') ? namedArgs['copy'] : false,
             cut: namedArgs.containsKey('cut') ? namedArgs['cut'] : false,
             paste: namedArgs.containsKey('paste') ? namedArgs['paste'] : false,
-            selectAll: namedArgs.containsKey('selectAll') ? namedArgs['selectAll'] : false);
+            selectAll: namedArgs.containsKey('selectAll')
+                ? namedArgs['selectAll']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -115,7 +124,7 @@ extension ToolbarOptionsBinding on ToolbarOptions {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ToolbarOptions');
+        return const HTType('ToolbarOptions');
       case 'copy':
         return copy;
       case 'cut':
@@ -125,7 +134,7 @@ extension ToolbarOptionsBinding on ToolbarOptions {
       case 'selectAll':
         return selectAll;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -141,97 +150,137 @@ class EditableTextAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             controller: namedArgs['controller'],
             focusNode: namedArgs['focusNode'],
-            readOnly: namedArgs.containsKey('readOnly') ? namedArgs['readOnly'] : false,
-            obscuringCharacter: namedArgs.containsKey('obscuringCharacter') ? namedArgs['obscuringCharacter'] : '•',
-            obscureText: namedArgs.containsKey('obscureText') ? namedArgs['obscureText'] : false,
-            autocorrect: namedArgs.containsKey('autocorrect') ? namedArgs['autocorrect'] : true,
-            smartDashesType: namedArgs.containsKey('smartDashesType') ? namedArgs['smartDashesType'] : null,
-            smartQuotesType: namedArgs.containsKey('smartQuotesType') ? namedArgs['smartQuotesType'] : null,
-            enableSuggestions: namedArgs.containsKey('enableSuggestions') ? namedArgs['enableSuggestions'] : true,
+            readOnly: namedArgs.containsKey('readOnly')
+                ? namedArgs['readOnly']
+                : false,
+            obscuringCharacter: namedArgs.containsKey('obscuringCharacter')
+                ? namedArgs['obscuringCharacter']
+                : '•',
+            obscureText: namedArgs.containsKey('obscureText')
+                ? namedArgs['obscureText']
+                : false,
+            autocorrect: namedArgs.containsKey('autocorrect')
+                ? namedArgs['autocorrect']
+                : true,
+            smartDashesType: namedArgs.containsKey('smartDashesType')
+                ? namedArgs['smartDashesType']
+                : null,
+            smartQuotesType: namedArgs.containsKey('smartQuotesType')
+                ? namedArgs['smartQuotesType']
+                : null,
+            enableSuggestions: namedArgs.containsKey('enableSuggestions')
+                ? namedArgs['enableSuggestions']
+                : true,
             style: namedArgs['style'],
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
             cursorColor: namedArgs['cursorColor'],
             backgroundCursorColor: namedArgs['backgroundCursorColor'],
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : TextAlign.start,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
-            minLines: namedArgs.containsKey('minLines') ? namedArgs['minLines'] : null,
-            expands: namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
-            forceLine: namedArgs.containsKey('forceLine') ? namedArgs['forceLine'] : true,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            textWidthBasis:
-                namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : TextWidthBasis.parent,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            showCursor: namedArgs.containsKey('showCursor') ? namedArgs['showCursor'] : null,
-            showSelectionHandles:
-                namedArgs.containsKey('showSelectionHandles') ? namedArgs['showSelectionHandles'] : false,
-            selectionColor: namedArgs.containsKey('selectionColor') ? namedArgs['selectionColor'] : null,
-            selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
-            keyboardType: namedArgs.containsKey('keyboardType') ? namedArgs['keyboardType'] : null,
-            textInputAction: namedArgs.containsKey('textInputAction') ? namedArgs['textInputAction'] : null,
-            textCapitalization:
-                namedArgs.containsKey('textCapitalization') ? namedArgs['textCapitalization'] : TextCapitalization.none,
-            onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
-            onEditingComplete: namedArgs.containsKey('onEditingComplete') ? namedArgs['onEditingComplete'] : null,
-            onSubmitted: namedArgs.containsKey('onSubmitted') ? namedArgs['onSubmitted'] : null,
-            onAppPrivateCommand: namedArgs.containsKey('onAppPrivateCommand') ? namedArgs['onAppPrivateCommand'] : null,
-            onSelectionChanged: namedArgs.containsKey('onSelectionChanged') ? namedArgs['onSelectionChanged'] : null,
-            onSelectionHandleTapped:
-                namedArgs.containsKey('onSelectionHandleTapped') ? namedArgs['onSelectionHandleTapped'] : null,
-            inputFormatters: namedArgs.containsKey('inputFormatters')
-                ? List<TextInputFormatter>.from(namedArgs['inputFormatters'])
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : TextAlign.start,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            maxLines:
+                namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : 1,
+            minLines: namedArgs.containsKey('minLines')
+                ? namedArgs['minLines']
+                : null,
+            expands:
+                namedArgs.containsKey('expands') ? namedArgs['expands'] : false,
+            forceLine: namedArgs.containsKey('forceLine')
+                ? namedArgs['forceLine']
+                : true,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : TextWidthBasis.parent,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            showCursor: namedArgs.containsKey('showCursor')
+                ? namedArgs['showCursor']
+                : null,
+            showSelectionHandles: namedArgs.containsKey('showSelectionHandles')
+                ? namedArgs['showSelectionHandles']
+                : false,
+            selectionColor: namedArgs.containsKey('selectionColor')
+                ? namedArgs['selectionColor']
+                : null,
+            selectionControls: namedArgs.containsKey('selectionControls')
+                ? namedArgs['selectionControls']
+                : null,
+            keyboardType: namedArgs.containsKey('keyboardType')
+                ? namedArgs['keyboardType']
+                : null,
+            textInputAction: namedArgs.containsKey('textInputAction')
+                ? namedArgs['textInputAction']
+                : null,
+            textCapitalization: namedArgs.containsKey('textCapitalization')
+                ? namedArgs['textCapitalization']
+                : TextCapitalization.none,
+            onChanged: namedArgs.containsKey('onChanged')
+                ? namedArgs['onChanged']
+                : null,
+            onEditingComplete: namedArgs.containsKey('onEditingComplete')
+                ? namedArgs['onEditingComplete']
                 : null,
+            onSubmitted: namedArgs.containsKey('onSubmitted')
+                ? namedArgs['onSubmitted']
+                : null,
+            onAppPrivateCommand: namedArgs.containsKey('onAppPrivateCommand')
+                ? namedArgs['onAppPrivateCommand']
+                : null,
+            onSelectionChanged: namedArgs.containsKey('onSelectionChanged')
+                ? namedArgs['onSelectionChanged']
+                : null,
+            onSelectionHandleTapped: namedArgs.containsKey('onSelectionHandleTapped') ? namedArgs['onSelectionHandleTapped'] : null,
+            inputFormatters: namedArgs.containsKey('inputFormatters') ? List<TextInputFormatter>.from(namedArgs['inputFormatters']) : null,
             mouseCursor: namedArgs.containsKey('mouseCursor') ? namedArgs['mouseCursor'] : null,
-            rendererIgnoresPointer:
-                namedArgs.containsKey('rendererIgnoresPointer') ? namedArgs['rendererIgnoresPointer'] : false,
+            rendererIgnoresPointer: namedArgs.containsKey('rendererIgnoresPointer') ? namedArgs['rendererIgnoresPointer'] : false,
             cursorWidth: namedArgs.containsKey('cursorWidth') ? namedArgs['cursorWidth'] : 2.0,
             cursorHeight: namedArgs.containsKey('cursorHeight') ? namedArgs['cursorHeight'] : null,
             cursorRadius: namedArgs.containsKey('cursorRadius') ? namedArgs['cursorRadius'] : null,
-            cursorOpacityAnimates:
-                namedArgs.containsKey('cursorOpacityAnimates') ? namedArgs['cursorOpacityAnimates'] : false,
+            cursorOpacityAnimates: namedArgs.containsKey('cursorOpacityAnimates') ? namedArgs['cursorOpacityAnimates'] : false,
             cursorOffset: namedArgs.containsKey('cursorOffset') ? namedArgs['cursorOffset'] : null,
-            paintCursorAboveText:
-                namedArgs.containsKey('paintCursorAboveText') ? namedArgs['paintCursorAboveText'] : false,
-            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle')
-                ? namedArgs['selectionHeightStyle']
-                : ui.BoxHeightStyle.tight,
-            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle')
-                ? namedArgs['selectionWidthStyle']
-                : ui.BoxWidthStyle.tight,
-            scrollPadding:
-                namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
-            keyboardAppearance:
-                namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : Brightness.light,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            enableInteractiveSelection:
-                namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
+            paintCursorAboveText: namedArgs.containsKey('paintCursorAboveText') ? namedArgs['paintCursorAboveText'] : false,
+            selectionHeightStyle: namedArgs.containsKey('selectionHeightStyle') ? namedArgs['selectionHeightStyle'] : ui.BoxHeightStyle.tight,
+            selectionWidthStyle: namedArgs.containsKey('selectionWidthStyle') ? namedArgs['selectionWidthStyle'] : ui.BoxWidthStyle.tight,
+            scrollPadding: namedArgs.containsKey('scrollPadding') ? namedArgs['scrollPadding'] : const EdgeInsets.all(20.0),
+            keyboardAppearance: namedArgs.containsKey('keyboardAppearance') ? namedArgs['keyboardAppearance'] : Brightness.light,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            enableInteractiveSelection: namedArgs.containsKey('enableInteractiveSelection') ? namedArgs['enableInteractiveSelection'] : true,
             scrollController: namedArgs.containsKey('scrollController') ? namedArgs['scrollController'] : null,
             scrollPhysics: namedArgs.containsKey('scrollPhysics') ? namedArgs['scrollPhysics'] : null,
-            autocorrectionTextRectColor:
-                namedArgs.containsKey('autocorrectionTextRectColor') ? namedArgs['autocorrectionTextRectColor'] : null,
-            toolbarOptions: namedArgs.containsKey('toolbarOptions')
-                ? namedArgs['toolbarOptions']
-                : const ToolbarOptions(copy: true, cut: true, paste: true, selectAll: true),
+            autocorrectionTextRectColor: namedArgs.containsKey('autocorrectionTextRectColor') ? namedArgs['autocorrectionTextRectColor'] : null,
+            toolbarOptions: namedArgs.containsKey('toolbarOptions') ? namedArgs['toolbarOptions'] : const ToolbarOptions(copy: true, cut: true, paste: true, selectAll: true),
             autofillHints: namedArgs.containsKey('autofillHints') ? namedArgs['autofillHints'] : null,
             clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
             restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null);
       case 'EditableText.debugDeterministicCursor':
         return EditableText.debugDeterministicCursor;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'EditableText.debugDeterministicCursor':
         return EditableText.debugDeterministicCursor = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -242,11 +291,13 @@ class EditableTextAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'AppPrivateCommandCallback': (HTFunction function) =>
-          (arg1, arg2) => function.call(positionalArgs: [arg1, arg2], namedArgs: const {}),
-      'SelectionChangedCallback': (HTFunction function) =>
-          (selection, cause) => function.call(positionalArgs: [selection, cause], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'AppPrivateCommandCallback': (HTFunction function) => (arg1, arg2) =>
+          function.call(positionalArgs: [arg1, arg2], namedArgs: const {}),
+      'SelectionChangedCallback': (HTFunction function) => (selection, cause) =>
+          function
+              .call(positionalArgs: [selection, cause], namedArgs: const {}),
     };
   }
 }
@@ -255,7 +306,7 @@ extension EditableTextBinding on EditableText {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EditableText');
+        return const HTType('EditableText');
       case 'controller':
         return controller;
       case 'focusNode':
@@ -383,29 +434,41 @@ extension EditableTextBinding on EditableText {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -419,7 +482,7 @@ class EditableTextStateAutoBinding extends HTExternalClass {
       case 'EditableTextState':
         return ({positionalArgs, namedArgs, typeArgs}) => EditableTextState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -435,8 +498,8 @@ class EditableTextStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -445,7 +508,7 @@ extension EditableTextStateBinding on EditableTextState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EditableTextState');
+        return const HTType('EditableTextState');
       case 'currentAutofillScope':
         return currentAutofillScope;
       case 'wantKeepAlive':
@@ -477,19 +540,25 @@ extension EditableTextStateBinding on EditableTextState {
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'updateEditingValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateEditingValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateEditingValue(positionalArgs[0]);
       case 'performAction':
-        return ({positionalArgs, namedArgs, typeArgs}) => performAction(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            performAction(positionalArgs[0]);
       case 'performPrivateCommand':
-        return ({positionalArgs, namedArgs, typeArgs}) => performPrivateCommand(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            performPrivateCommand(positionalArgs[0], positionalArgs[1]);
       case 'updateFloatingCursor':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateFloatingCursor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateFloatingCursor(positionalArgs[0]);
       case 'beginBatchEdit':
         return ({positionalArgs, namedArgs, typeArgs}) => beginBatchEdit();
       case 'endBatchEdit':
@@ -501,7 +570,8 @@ extension EditableTextStateBinding on EditableTextState {
       case 'didChangeMetrics':
         return ({positionalArgs, namedArgs, typeArgs}) => didChangeMetrics();
       case 'bringIntoView':
-        return ({positionalArgs, namedArgs, typeArgs}) => bringIntoView(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            bringIntoView(positionalArgs[0]);
       case 'showToolbar':
         return ({positionalArgs, namedArgs, typeArgs}) => showToolbar();
       case 'hideToolbar':
@@ -512,26 +582,31 @@ extension EditableTextStateBinding on EditableTextState {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             showAutocorrectionPromptRect(positionalArgs[0], positionalArgs[1]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'buildTextSpan':
         return ({positionalArgs, namedArgs, typeArgs}) => buildTextSpan();
       case 'deactivate':
         return ({positionalArgs, namedArgs, typeArgs}) => deactivate();
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -541,7 +616,7 @@ extension EditableTextStateBinding on EditableTextState {
         textEditingValue = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/fade_in_image.g.dart b/lib/bindings/flutter/widgets/fade_in_image.g.dart
index 2f2026e..55b1850 100644
--- a/lib/bindings/flutter/widgets/fade_in_image.g.dart
+++ b/lib/bindings/flutter/widgets/fade_in_image.g.dart
@@ -13,95 +13,153 @@ class FadeInImageAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             placeholder: namedArgs['placeholder'],
             placeholderErrorBuilder:
-                namedArgs.containsKey('placeholderErrorBuilder') ? namedArgs['placeholderErrorBuilder'] : null,
+                namedArgs.containsKey('placeholderErrorBuilder')
+                    ? namedArgs['placeholderErrorBuilder']
+                    : null,
             image: namedArgs['image'],
-            imageErrorBuilder: namedArgs.containsKey('imageErrorBuilder') ? namedArgs['imageErrorBuilder'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            imageSemanticLabel: namedArgs.containsKey('imageSemanticLabel') ? namedArgs['imageSemanticLabel'] : null,
+            imageErrorBuilder: namedArgs.containsKey('imageErrorBuilder')
+                ? namedArgs['imageErrorBuilder']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
+            imageSemanticLabel: namedArgs.containsKey('imageSemanticLabel')
+                ? namedArgs['imageSemanticLabel']
+                : null,
             fadeOutDuration: namedArgs.containsKey('fadeOutDuration')
                 ? namedArgs['fadeOutDuration']
                 : const Duration(milliseconds: 300),
-            fadeOutCurve: namedArgs.containsKey('fadeOutCurve') ? namedArgs['fadeOutCurve'] : Curves.easeOut,
+            fadeOutCurve: namedArgs.containsKey('fadeOutCurve')
+                ? namedArgs['fadeOutCurve']
+                : Curves.easeOut,
             fadeInDuration: namedArgs.containsKey('fadeInDuration')
                 ? namedArgs['fadeInDuration']
                 : const Duration(milliseconds: 700),
-            fadeInCurve: namedArgs.containsKey('fadeInCurve') ? namedArgs['fadeInCurve'] : Curves.easeIn,
+            fadeInCurve: namedArgs.containsKey('fadeInCurve')
+                ? namedArgs['fadeInCurve']
+                : Curves.easeIn,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false);
       case 'FadeInImage.memoryNetwork':
         return ({positionalArgs, namedArgs, typeArgs}) => FadeInImage.memoryNetwork(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             placeholder: namedArgs['placeholder'],
             placeholderErrorBuilder:
-                namedArgs.containsKey('placeholderErrorBuilder') ? namedArgs['placeholderErrorBuilder'] : null,
+                namedArgs.containsKey('placeholderErrorBuilder')
+                    ? namedArgs['placeholderErrorBuilder']
+                    : null,
             image: namedArgs['image'],
-            imageErrorBuilder: namedArgs.containsKey('imageErrorBuilder') ? namedArgs['imageErrorBuilder'] : null,
-            placeholderScale: namedArgs.containsKey('placeholderScale') ? namedArgs['placeholderScale'] : 1.0,
-            imageScale: namedArgs.containsKey('imageScale') ? namedArgs['imageScale'] : 1.0,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            imageSemanticLabel: namedArgs.containsKey('imageSemanticLabel') ? namedArgs['imageSemanticLabel'] : null,
+            imageErrorBuilder: namedArgs.containsKey('imageErrorBuilder')
+                ? namedArgs['imageErrorBuilder']
+                : null,
+            placeholderScale: namedArgs.containsKey('placeholderScale')
+                ? namedArgs['placeholderScale']
+                : 1.0,
+            imageScale: namedArgs.containsKey('imageScale')
+                ? namedArgs['imageScale']
+                : 1.0,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
+            imageSemanticLabel: namedArgs.containsKey('imageSemanticLabel')
+                ? namedArgs['imageSemanticLabel']
+                : null,
             fadeOutDuration: namedArgs.containsKey('fadeOutDuration')
                 ? namedArgs['fadeOutDuration']
                 : const Duration(milliseconds: 300),
-            fadeOutCurve: namedArgs.containsKey('fadeOutCurve') ? namedArgs['fadeOutCurve'] : Curves.easeOut,
+            fadeOutCurve: namedArgs.containsKey('fadeOutCurve')
+                ? namedArgs['fadeOutCurve']
+                : Curves.easeOut,
             fadeInDuration: namedArgs.containsKey('fadeInDuration')
                 ? namedArgs['fadeInDuration']
                 : const Duration(milliseconds: 700),
-            fadeInCurve: namedArgs.containsKey('fadeInCurve') ? namedArgs['fadeInCurve'] : Curves.easeIn,
+            fadeInCurve: namedArgs.containsKey('fadeInCurve')
+                ? namedArgs['fadeInCurve']
+                : Curves.easeIn,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            placeholderCacheWidth:
-                namedArgs.containsKey('placeholderCacheWidth') ? namedArgs['placeholderCacheWidth'] : null,
-            placeholderCacheHeight:
-                namedArgs.containsKey('placeholderCacheHeight') ? namedArgs['placeholderCacheHeight'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            placeholderCacheWidth: namedArgs.containsKey('placeholderCacheWidth') ? namedArgs['placeholderCacheWidth'] : null,
+            placeholderCacheHeight: namedArgs.containsKey('placeholderCacheHeight') ? namedArgs['placeholderCacheHeight'] : null,
             imageCacheWidth: namedArgs.containsKey('imageCacheWidth') ? namedArgs['imageCacheWidth'] : null,
             imageCacheHeight: namedArgs.containsKey('imageCacheHeight') ? namedArgs['imageCacheHeight'] : null);
       case 'FadeInImage.assetNetwork':
         return ({positionalArgs, namedArgs, typeArgs}) => FadeInImage.assetNetwork(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             placeholder: namedArgs['placeholder'],
-            placeholderErrorBuilder:
-                namedArgs.containsKey('placeholderErrorBuilder') ? namedArgs['placeholderErrorBuilder'] : null,
+            placeholderErrorBuilder: namedArgs.containsKey('placeholderErrorBuilder')
+                ? namedArgs['placeholderErrorBuilder']
+                : null,
             image: namedArgs['image'],
-            imageErrorBuilder: namedArgs.containsKey('imageErrorBuilder') ? namedArgs['imageErrorBuilder'] : null,
-            bundle: namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
-            placeholderScale: namedArgs.containsKey('placeholderScale') ? namedArgs['placeholderScale'] : null,
-            imageScale: namedArgs.containsKey('imageScale') ? namedArgs['imageScale'] : 1.0,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            imageSemanticLabel: namedArgs.containsKey('imageSemanticLabel') ? namedArgs['imageSemanticLabel'] : null,
+            imageErrorBuilder: namedArgs.containsKey('imageErrorBuilder')
+                ? namedArgs['imageErrorBuilder']
+                : null,
+            bundle:
+                namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
+            placeholderScale: namedArgs.containsKey('placeholderScale')
+                ? namedArgs['placeholderScale']
+                : null,
+            imageScale: namedArgs.containsKey('imageScale')
+                ? namedArgs['imageScale']
+                : 1.0,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
+            imageSemanticLabel: namedArgs.containsKey('imageSemanticLabel')
+                ? namedArgs['imageSemanticLabel']
+                : null,
             fadeOutDuration: namedArgs.containsKey('fadeOutDuration')
                 ? namedArgs['fadeOutDuration']
                 : const Duration(milliseconds: 300),
-            fadeOutCurve: namedArgs.containsKey('fadeOutCurve') ? namedArgs['fadeOutCurve'] : Curves.easeOut,
+            fadeOutCurve: namedArgs.containsKey('fadeOutCurve')
+                ? namedArgs['fadeOutCurve']
+                : Curves.easeOut,
             fadeInDuration: namedArgs.containsKey('fadeInDuration')
                 ? namedArgs['fadeInDuration']
                 : const Duration(milliseconds: 700),
-            fadeInCurve: namedArgs.containsKey('fadeInCurve') ? namedArgs['fadeInCurve'] : Curves.easeIn,
+            fadeInCurve: namedArgs.containsKey('fadeInCurve')
+                ? namedArgs['fadeInCurve']
+                : Curves.easeIn,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            placeholderCacheWidth:
-                namedArgs.containsKey('placeholderCacheWidth') ? namedArgs['placeholderCacheWidth'] : null,
-            placeholderCacheHeight:
-                namedArgs.containsKey('placeholderCacheHeight') ? namedArgs['placeholderCacheHeight'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            placeholderCacheWidth: namedArgs.containsKey('placeholderCacheWidth') ? namedArgs['placeholderCacheWidth'] : null,
+            placeholderCacheHeight: namedArgs.containsKey('placeholderCacheHeight') ? namedArgs['placeholderCacheHeight'] : null,
             imageCacheWidth: namedArgs.containsKey('imageCacheWidth') ? namedArgs['imageCacheWidth'] : null,
             imageCacheHeight: namedArgs.containsKey('imageCacheHeight') ? namedArgs['imageCacheHeight'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -112,8 +170,10 @@ class FadeInImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageErrorWidgetBuilder': (HTFunction function) => (context, error, stackTrace) =>
-          function.call(positionalArgs: [context, error, stackTrace], namedArgs: const {}) as Widget,
+      'ImageErrorWidgetBuilder': (HTFunction function) =>
+          (context, error, stackTrace) => function.call(
+              positionalArgs: [context, error, stackTrace],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -122,7 +182,7 @@ extension FadeInImageBinding on FadeInImage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FadeInImage');
+        return const HTType('FadeInImage');
       case 'placeholder':
         return placeholder;
       case 'placeholderErrorBuilder':
@@ -160,31 +220,44 @@ extension FadeInImageBinding on FadeInImage {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/focus_manager.g.dart b/lib/bindings/flutter/widgets/focus_manager.g.dart
index 16d1bf3..ed9a2e1 100644
--- a/lib/bindings/flutter/widgets/focus_manager.g.dart
+++ b/lib/bindings/flutter/widgets/focus_manager.g.dart
@@ -17,7 +17,7 @@ class KeyEventResultAutoBinding extends HTExternalClass {
       case 'KeyEventResult.skipRemainingHandlers':
         return KeyEventResult.skipRemainingHandlers;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,13 +25,14 @@ class KeyEventResultAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('KeyEventResult');
+        return const HTType('KeyEventResult');
       case 'index':
         return (instance as KeyEventResult).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as KeyEventResult).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as KeyEventResult).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -49,7 +50,7 @@ class UnfocusDispositionAutoBinding extends HTExternalClass {
       case 'UnfocusDisposition.previouslyFocusedChild':
         return UnfocusDisposition.previouslyFocusedChild;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -57,13 +58,14 @@ class UnfocusDispositionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UnfocusDisposition');
+        return const HTType('UnfocusDisposition');
       case 'index':
         return (instance as UnfocusDisposition).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as UnfocusDisposition).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as UnfocusDisposition).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -81,7 +83,7 @@ class FocusHighlightModeAutoBinding extends HTExternalClass {
       case 'FocusHighlightMode.traditional':
         return FocusHighlightMode.traditional;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -89,13 +91,14 @@ class FocusHighlightModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusHighlightMode');
+        return const HTType('FocusHighlightMode');
       case 'index':
         return (instance as FocusHighlightMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FocusHighlightMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FocusHighlightMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -115,7 +118,7 @@ class FocusHighlightStrategyAutoBinding extends HTExternalClass {
       case 'FocusHighlightStrategy.alwaysTraditional':
         return FocusHighlightStrategy.alwaysTraditional;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -123,13 +126,14 @@ class FocusHighlightStrategyAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusHighlightStrategy');
+        return const HTType('FocusHighlightStrategy');
       case 'index':
         return (instance as FocusHighlightStrategy).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as FocusHighlightStrategy).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as FocusHighlightStrategy).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -142,14 +146,22 @@ class FocusNodeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'FocusNode':
         return ({positionalArgs, namedArgs, typeArgs}) => FocusNode(
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
             onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null,
-            skipTraversal: namedArgs.containsKey('skipTraversal') ? namedArgs['skipTraversal'] : false,
-            canRequestFocus: namedArgs.containsKey('canRequestFocus') ? namedArgs['canRequestFocus'] : true,
+            skipTraversal: namedArgs.containsKey('skipTraversal')
+                ? namedArgs['skipTraversal']
+                : false,
+            canRequestFocus: namedArgs.containsKey('canRequestFocus')
+                ? namedArgs['canRequestFocus']
+                : true,
             descendantsAreFocusable:
-                namedArgs.containsKey('descendantsAreFocusable') ? namedArgs['descendantsAreFocusable'] : true);
+                namedArgs.containsKey('descendantsAreFocusable')
+                    ? namedArgs['descendantsAreFocusable']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -165,8 +177,8 @@ class FocusNodeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'FocusOnKeyCallback': (HTFunction function) =>
-          (node, event) => function.call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
+      'FocusOnKeyCallback': (HTFunction function) => (node, event) => function
+          .call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
     };
   }
 }
@@ -175,7 +187,7 @@ extension FocusNodeBinding on FocusNode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusNode');
+        return const HTType('FocusNode');
       case 'skipTraversal':
         return skipTraversal;
       case 'canRequestFocus':
@@ -218,12 +230,16 @@ extension FocusNodeBinding on FocusNode {
         return rect;
       case 'unfocus':
         return ({positionalArgs, namedArgs, typeArgs}) => unfocus(
-            disposition: namedArgs.containsKey('disposition') ? namedArgs['disposition'] : UnfocusDisposition.scope);
+            disposition: namedArgs.containsKey('disposition')
+                ? namedArgs['disposition']
+                : UnfocusDisposition.scope);
       case 'consumeKeyboardToken':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumeKeyboardToken();
-      case 'attach':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            attach(positionalArgs[0], onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null);
+            consumeKeyboardToken();
+      case 'attach':
+        return ({positionalArgs, namedArgs, typeArgs}) => attach(
+            positionalArgs[0],
+            onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'requestFocus':
@@ -234,31 +250,45 @@ extension FocusNodeBinding on FocusNode {
       case 'previousFocus':
         return ({positionalArgs, namedArgs, typeArgs}) => previousFocus();
       case 'focusInDirection':
-        return ({positionalArgs, namedArgs, typeArgs}) => focusInDirection(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            focusInDirection(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -277,7 +307,7 @@ extension FocusNodeBinding on FocusNode {
         debugLabel = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -290,12 +320,18 @@ class FocusScopeNodeAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'FocusScopeNode':
         return ({positionalArgs, namedArgs, typeArgs}) => FocusScopeNode(
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
             onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null,
-            skipTraversal: namedArgs.containsKey('skipTraversal') ? namedArgs['skipTraversal'] : false,
-            canRequestFocus: namedArgs.containsKey('canRequestFocus') ? namedArgs['canRequestFocus'] : true);
+            skipTraversal: namedArgs.containsKey('skipTraversal')
+                ? namedArgs['skipTraversal']
+                : false,
+            canRequestFocus: namedArgs.containsKey('canRequestFocus')
+                ? namedArgs['canRequestFocus']
+                : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -306,8 +342,8 @@ class FocusScopeNodeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'FocusOnKeyCallback': (HTFunction function) =>
-          (node, event) => function.call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
+      'FocusOnKeyCallback': (HTFunction function) => (node, event) => function
+          .call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
     };
   }
 }
@@ -316,7 +352,7 @@ extension FocusScopeNodeBinding on FocusScopeNode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusScopeNode');
+        return const HTType('FocusScopeNode');
       case 'nearestScope':
         return nearestScope;
       case 'isFirstFocus':
@@ -362,19 +398,26 @@ extension FocusScopeNodeBinding on FocusScopeNode {
       case 'rect':
         return rect;
       case 'setFirstFocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => setFirstFocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setFirstFocus(positionalArgs[0]);
       case 'autofocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => autofocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            autofocus(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'unfocus':
         return ({positionalArgs, namedArgs, typeArgs}) => unfocus(
-            disposition: namedArgs.containsKey('disposition') ? namedArgs['disposition'] : UnfocusDisposition.scope);
+            disposition: namedArgs.containsKey('disposition')
+                ? namedArgs['disposition']
+                : UnfocusDisposition.scope);
       case 'consumeKeyboardToken':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumeKeyboardToken();
-      case 'attach':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            attach(positionalArgs[0], onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null);
+            consumeKeyboardToken();
+      case 'attach':
+        return ({positionalArgs, namedArgs, typeArgs}) => attach(
+            positionalArgs[0],
+            onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'requestFocus':
@@ -385,29 +428,42 @@ extension FocusScopeNodeBinding on FocusScopeNode {
       case 'previousFocus':
         return ({positionalArgs, namedArgs, typeArgs}) => previousFocus();
       case 'focusInDirection':
-        return ({positionalArgs, namedArgs, typeArgs}) => focusInDirection(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            focusInDirection(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -423,7 +479,7 @@ class FocusManagerAutoBinding extends HTExternalClass {
       case 'FocusManager.instance':
         return FocusManager.instance;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -442,7 +498,7 @@ extension FocusManagerBinding on FocusManager {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusManager');
+        return const HTType('FocusManager');
       case 'rootScope':
         return rootScope;
       case 'highlightStrategy':
@@ -452,25 +508,40 @@ extension FocusManagerBinding on FocusManager {
       case 'primaryFocus':
         return primaryFocus;
       case 'addHighlightModeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addHighlightModeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addHighlightModeListener(positionalArgs[0]);
       case 'removeHighlightModeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeHighlightModeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeHighlightModeListener(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
-      case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            debugFillProperties(positionalArgs[0]);
+      case 'toString':
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -478,7 +549,7 @@ extension FocusManagerBinding on FocusManager {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -488,7 +559,7 @@ extension FocusManagerBinding on FocusManager {
         highlightStrategy = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/focus_scope.g.dart b/lib/bindings/flutter/widgets/focus_scope.g.dart
index 710d2ef..0218a1a 100644
--- a/lib/bindings/flutter/widgets/focus_scope.g.dart
+++ b/lib/bindings/flutter/widgets/focus_scope.g.dart
@@ -12,26 +12,49 @@ class FocusAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Focus(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            focusNode: namedArgs.containsKey('focusNode') ? namedArgs['focusNode'] : null,
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            onFocusChange: namedArgs.containsKey('onFocusChange') ? namedArgs['onFocusChange'] : null,
+            focusNode: namedArgs.containsKey('focusNode')
+                ? namedArgs['focusNode']
+                : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            onFocusChange: namedArgs.containsKey('onFocusChange')
+                ? namedArgs['onFocusChange']
+                : null,
             onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null,
-            canRequestFocus: namedArgs.containsKey('canRequestFocus') ? namedArgs['canRequestFocus'] : null,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null,
+            canRequestFocus: namedArgs.containsKey('canRequestFocus')
+                ? namedArgs['canRequestFocus']
+                : null,
             descendantsAreFocusable:
-                namedArgs.containsKey('descendantsAreFocusable') ? namedArgs['descendantsAreFocusable'] : true,
-            skipTraversal: namedArgs.containsKey('skipTraversal') ? namedArgs['skipTraversal'] : null,
-            includeSemantics: namedArgs.containsKey('includeSemantics') ? namedArgs['includeSemantics'] : true);
+                namedArgs.containsKey('descendantsAreFocusable')
+                    ? namedArgs['descendantsAreFocusable']
+                    : true,
+            skipTraversal: namedArgs.containsKey('skipTraversal')
+                ? namedArgs['skipTraversal']
+                : null,
+            includeSemantics: namedArgs.containsKey('includeSemantics')
+                ? namedArgs['includeSemantics']
+                : true);
       case 'Focus.of':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Focus.of(positionalArgs[0], scopeOk: namedArgs.containsKey('scopeOk') ? namedArgs['scopeOk'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Focus.of(
+            positionalArgs[0],
+            scopeOk: namedArgs.containsKey('scopeOk')
+                ? namedArgs['scopeOk']
+                : false);
       case 'Focus.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            Focus.maybeOf(positionalArgs[0], scopeOk: namedArgs.containsKey('scopeOk') ? namedArgs['scopeOk'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Focus.maybeOf(
+            positionalArgs[0],
+            scopeOk: namedArgs.containsKey('scopeOk')
+                ? namedArgs['scopeOk']
+                : false);
       case 'Focus.isAt':
-        return ({positionalArgs, namedArgs, typeArgs}) => Focus.isAt(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Focus.isAt(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -42,8 +65,8 @@ class FocusAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'FocusOnKeyCallback': (HTFunction function) =>
-          (node, event) => function.call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
+      'FocusOnKeyCallback': (HTFunction function) => (node, event) => function
+          .call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
     };
   }
 }
@@ -52,7 +75,7 @@ extension FocusBinding on Focus {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Focus');
+        return const HTType('Focus');
       case 'debugLabel':
         return debugLabel;
       case 'child':
@@ -78,7 +101,8 @@ extension FocusBinding on Focus {
       case 'hashCode':
         return hashCode;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'createElement':
@@ -87,22 +111,33 @@ extension FocusBinding on Focus {
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -118,16 +153,27 @@ class FocusScopeAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             node: namedArgs.containsKey('node') ? namedArgs['node'] : null,
             child: namedArgs['child'],
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            onFocusChange: namedArgs.containsKey('onFocusChange') ? namedArgs['onFocusChange'] : null,
-            canRequestFocus: namedArgs.containsKey('canRequestFocus') ? namedArgs['canRequestFocus'] : null,
-            skipTraversal: namedArgs.containsKey('skipTraversal') ? namedArgs['skipTraversal'] : null,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            onFocusChange: namedArgs.containsKey('onFocusChange')
+                ? namedArgs['onFocusChange']
+                : null,
+            canRequestFocus: namedArgs.containsKey('canRequestFocus')
+                ? namedArgs['canRequestFocus']
+                : null,
+            skipTraversal: namedArgs.containsKey('skipTraversal')
+                ? namedArgs['skipTraversal']
+                : null,
             onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null);
       case 'FocusScope.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => FocusScope.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FocusScope.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -138,8 +184,8 @@ class FocusScopeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'FocusOnKeyCallback': (HTFunction function) =>
-          (node, event) => function.call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
+      'FocusOnKeyCallback': (HTFunction function) => (node, event) => function
+          .call(positionalArgs: [node, event], namedArgs: const {}) as dynamic,
     };
   }
 }
@@ -148,7 +194,7 @@ extension FocusScopeBinding on FocusScope {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusScope');
+        return const HTType('FocusScope');
       case 'debugLabel':
         return debugLabel;
       case 'child':
@@ -176,29 +222,41 @@ extension FocusScopeBinding on FocusScope {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -212,10 +270,12 @@ class ExcludeFocusAutoBinding extends HTExternalClass {
       case 'ExcludeFocus':
         return ({positionalArgs, namedArgs, typeArgs}) => ExcludeFocus(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            excluding: namedArgs.containsKey('excluding') ? namedArgs['excluding'] : true,
+            excluding: namedArgs.containsKey('excluding')
+                ? namedArgs['excluding']
+                : true,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -229,7 +289,7 @@ extension ExcludeFocusBinding on ExcludeFocus {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ExcludeFocus');
+        return const HTType('ExcludeFocus');
       case 'excluding':
         return excluding;
       case 'child':
@@ -239,31 +299,44 @@ extension ExcludeFocusBinding on ExcludeFocus {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/focus_traversal.g.dart b/lib/bindings/flutter/widgets/focus_traversal.g.dart
index 5c7c062..eb1d874 100644
--- a/lib/bindings/flutter/widgets/focus_traversal.g.dart
+++ b/lib/bindings/flutter/widgets/focus_traversal.g.dart
@@ -19,7 +19,7 @@ class TraversalDirectionAutoBinding extends HTExternalClass {
       case 'TraversalDirection.left':
         return TraversalDirection.left;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +27,14 @@ class TraversalDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TraversalDirection');
+        return const HTType('TraversalDirection');
       case 'index':
         return (instance as TraversalDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TraversalDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TraversalDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,9 +46,10 @@ class WidgetOrderTraversalPolicyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'WidgetOrderTraversalPolicy':
-        return ({positionalArgs, namedArgs, typeArgs}) => WidgetOrderTraversalPolicy();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            WidgetOrderTraversalPolicy();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -61,53 +63,66 @@ extension WidgetOrderTraversalPolicyBinding on WidgetOrderTraversalPolicy {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WidgetOrderTraversalPolicy');
+        return const HTType('WidgetOrderTraversalPolicy');
       case 'sortDescendants':
-        return ({positionalArgs, namedArgs, typeArgs}) => sortDescendants(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sortDescendants(positionalArgs[0], positionalArgs[1]);
       case 'invalidateScopeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => invalidateScopeData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invalidateScopeData(positionalArgs[0]);
       case 'changedScope':
         return ({positionalArgs, namedArgs, typeArgs}) => changedScope(
             node: namedArgs.containsKey('node') ? namedArgs['node'] : null,
-            oldScope: namedArgs.containsKey('oldScope') ? namedArgs['oldScope'] : null);
+            oldScope: namedArgs.containsKey('oldScope')
+                ? namedArgs['oldScope']
+                : null);
       case 'findFirstFocusInDirection':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             findFirstFocusInDirection(positionalArgs[0], positionalArgs[1]);
       case 'inDirection':
-        return ({positionalArgs, namedArgs, typeArgs}) => inDirection(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inDirection(positionalArgs[0], positionalArgs[1]);
       case 'findFirstFocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => findFirstFocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findFirstFocus(positionalArgs[0]);
       case 'findLastFocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => findLastFocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findLastFocus(positionalArgs[0]);
       case 'next':
-        return ({positionalArgs, namedArgs, typeArgs}) => next(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            next(positionalArgs[0]);
       case 'previous':
-        return ({positionalArgs, namedArgs, typeArgs}) => previous(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            previous(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class ReadingOrderTraversalPolicyAutoBinding extends HTExternalClass {
-  ReadingOrderTraversalPolicyAutoBinding() : super('ReadingOrderTraversalPolicy');
+  ReadingOrderTraversalPolicyAutoBinding()
+      : super('ReadingOrderTraversalPolicy');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ReadingOrderTraversalPolicy':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReadingOrderTraversalPolicy();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReadingOrderTraversalPolicy();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -121,39 +136,50 @@ extension ReadingOrderTraversalPolicyBinding on ReadingOrderTraversalPolicy {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReadingOrderTraversalPolicy');
+        return const HTType('ReadingOrderTraversalPolicy');
       case 'sortDescendants':
-        return ({positionalArgs, namedArgs, typeArgs}) => sortDescendants(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sortDescendants(positionalArgs[0], positionalArgs[1]);
       case 'invalidateScopeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => invalidateScopeData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invalidateScopeData(positionalArgs[0]);
       case 'changedScope':
         return ({positionalArgs, namedArgs, typeArgs}) => changedScope(
             node: namedArgs.containsKey('node') ? namedArgs['node'] : null,
-            oldScope: namedArgs.containsKey('oldScope') ? namedArgs['oldScope'] : null);
+            oldScope: namedArgs.containsKey('oldScope')
+                ? namedArgs['oldScope']
+                : null);
       case 'findFirstFocusInDirection':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             findFirstFocusInDirection(positionalArgs[0], positionalArgs[1]);
       case 'inDirection':
-        return ({positionalArgs, namedArgs, typeArgs}) => inDirection(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inDirection(positionalArgs[0], positionalArgs[1]);
       case 'findFirstFocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => findFirstFocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findFirstFocus(positionalArgs[0]);
       case 'findLastFocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => findLastFocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findLastFocus(positionalArgs[0]);
       case 'next':
-        return ({positionalArgs, namedArgs, typeArgs}) => next(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            next(positionalArgs[0]);
       case 'previous':
-        return ({positionalArgs, namedArgs, typeArgs}) => previous(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            previous(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -165,9 +191,10 @@ class NumericFocusOrderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NumericFocusOrder':
-        return ({positionalArgs, namedArgs, typeArgs}) => NumericFocusOrder(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NumericFocusOrder(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -181,26 +208,31 @@ extension NumericFocusOrderBinding on NumericFocusOrder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NumericFocusOrder');
+        return const HTType('NumericFocusOrder');
       case 'order':
         return order;
       case 'doCompare':
-        return ({positionalArgs, namedArgs, typeArgs}) => doCompare(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            doCompare(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -212,9 +244,10 @@ class LexicalFocusOrderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LexicalFocusOrder':
-        return ({positionalArgs, namedArgs, typeArgs}) => LexicalFocusOrder(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LexicalFocusOrder(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -228,26 +261,31 @@ extension LexicalFocusOrderBinding on LexicalFocusOrder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LexicalFocusOrder');
+        return const HTType('LexicalFocusOrder');
       case 'order':
         return order;
       case 'doCompare':
-        return ({positionalArgs, namedArgs, typeArgs}) => doCompare(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            doCompare(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -260,9 +298,12 @@ class OrderedTraversalPolicyAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'OrderedTraversalPolicy':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            OrderedTraversalPolicy(secondary: namedArgs.containsKey('secondary') ? namedArgs['secondary'] : null);
+            OrderedTraversalPolicy(
+                secondary: namedArgs.containsKey('secondary')
+                    ? namedArgs['secondary']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -276,41 +317,52 @@ extension OrderedTraversalPolicyBinding on OrderedTraversalPolicy {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OrderedTraversalPolicy');
+        return const HTType('OrderedTraversalPolicy');
       case 'secondary':
         return secondary;
       case 'sortDescendants':
-        return ({positionalArgs, namedArgs, typeArgs}) => sortDescendants(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sortDescendants(positionalArgs[0], positionalArgs[1]);
       case 'invalidateScopeData':
-        return ({positionalArgs, namedArgs, typeArgs}) => invalidateScopeData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invalidateScopeData(positionalArgs[0]);
       case 'changedScope':
         return ({positionalArgs, namedArgs, typeArgs}) => changedScope(
             node: namedArgs.containsKey('node') ? namedArgs['node'] : null,
-            oldScope: namedArgs.containsKey('oldScope') ? namedArgs['oldScope'] : null);
+            oldScope: namedArgs.containsKey('oldScope')
+                ? namedArgs['oldScope']
+                : null);
       case 'findFirstFocusInDirection':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             findFirstFocusInDirection(positionalArgs[0], positionalArgs[1]);
       case 'inDirection':
-        return ({positionalArgs, namedArgs, typeArgs}) => inDirection(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            inDirection(positionalArgs[0], positionalArgs[1]);
       case 'findFirstFocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => findFirstFocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findFirstFocus(positionalArgs[0]);
       case 'findLastFocus':
-        return ({positionalArgs, namedArgs, typeArgs}) => findLastFocus(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findLastFocus(positionalArgs[0]);
       case 'next':
-        return ({positionalArgs, namedArgs, typeArgs}) => next(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            next(positionalArgs[0]);
       case 'previous':
-        return ({positionalArgs, namedArgs, typeArgs}) => previous(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            previous(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -327,11 +379,13 @@ class FocusTraversalOrderAutoBinding extends HTExternalClass {
             order: namedArgs['order'],
             child: namedArgs['child']);
       case 'FocusTraversalOrder.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => FocusTraversalOrder.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FocusTraversalOrder.of(positionalArgs[0]);
       case 'FocusTraversalOrder.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => FocusTraversalOrder.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FocusTraversalOrder.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -345,7 +399,7 @@ extension FocusTraversalOrderBinding on FocusTraversalOrder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusTraversalOrder');
+        return const HTType('FocusTraversalOrder');
       case 'order':
         return order;
       case 'child':
@@ -355,31 +409,44 @@ extension FocusTraversalOrderBinding on FocusTraversalOrder {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -393,16 +460,21 @@ class FocusTraversalGroupAutoBinding extends HTExternalClass {
       case 'FocusTraversalGroup':
         return ({positionalArgs, namedArgs, typeArgs}) => FocusTraversalGroup(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            policy: namedArgs.containsKey('policy') ? namedArgs['policy'] : null,
+            policy:
+                namedArgs.containsKey('policy') ? namedArgs['policy'] : null,
             descendantsAreFocusable:
-                namedArgs.containsKey('descendantsAreFocusable') ? namedArgs['descendantsAreFocusable'] : true,
+                namedArgs.containsKey('descendantsAreFocusable')
+                    ? namedArgs['descendantsAreFocusable']
+                    : true,
             child: namedArgs['child']);
       case 'FocusTraversalGroup.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => FocusTraversalGroup.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FocusTraversalGroup.of(positionalArgs[0]);
       case 'FocusTraversalGroup.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => FocusTraversalGroup.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FocusTraversalGroup.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -416,7 +488,7 @@ extension FocusTraversalGroupBinding on FocusTraversalGroup {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FocusTraversalGroup');
+        return const HTType('FocusTraversalGroup');
       case 'policy':
         return policy;
       case 'descendantsAreFocusable':
@@ -430,29 +502,41 @@ extension FocusTraversalGroupBinding on FocusTraversalGroup {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -464,9 +548,10 @@ class RequestFocusIntentAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RequestFocusIntent':
-        return ({positionalArgs, namedArgs, typeArgs}) => RequestFocusIntent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RequestFocusIntent(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -480,20 +565,22 @@ extension RequestFocusIntentBinding on RequestFocusIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RequestFocusIntent');
+        return const HTType('RequestFocusIntent');
       case 'focusNode':
         return focusNode;
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -507,7 +594,7 @@ class RequestFocusActionAutoBinding extends HTExternalClass {
       case 'RequestFocusAction':
         return ({positionalArgs, namedArgs, typeArgs}) => RequestFocusAction();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -518,8 +605,8 @@ class RequestFocusActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -528,30 +615,37 @@ extension RequestFocusActionBinding on RequestFocusAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RequestFocusAction');
+        return const HTType('RequestFocusAction');
       case 'intentType':
         return intentType;
       case 'invoke':
-        return ({positionalArgs, namedArgs, typeArgs}) => invoke(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invoke(positionalArgs[0]);
       case 'isEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => isEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isEnabled(positionalArgs[0]);
       case 'consumesKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumesKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            consumesKey(positionalArgs[0]);
       case 'addActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addActionListener(positionalArgs[0]);
       case 'removeActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeActionListener(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -565,7 +659,7 @@ class NextFocusIntentAutoBinding extends HTExternalClass {
       case 'NextFocusIntent':
         return ({positionalArgs, namedArgs, typeArgs}) => NextFocusIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -579,18 +673,20 @@ extension NextFocusIntentBinding on NextFocusIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NextFocusIntent');
+        return const HTType('NextFocusIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -604,7 +700,7 @@ class NextFocusActionAutoBinding extends HTExternalClass {
       case 'NextFocusAction':
         return ({positionalArgs, namedArgs, typeArgs}) => NextFocusAction();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -615,8 +711,8 @@ class NextFocusActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -625,30 +721,37 @@ extension NextFocusActionBinding on NextFocusAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NextFocusAction');
+        return const HTType('NextFocusAction');
       case 'intentType':
         return intentType;
       case 'invoke':
-        return ({positionalArgs, namedArgs, typeArgs}) => invoke(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invoke(positionalArgs[0]);
       case 'isEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => isEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isEnabled(positionalArgs[0]);
       case 'consumesKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumesKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            consumesKey(positionalArgs[0]);
       case 'addActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addActionListener(positionalArgs[0]);
       case 'removeActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeActionListener(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -662,7 +765,7 @@ class PreviousFocusIntentAutoBinding extends HTExternalClass {
       case 'PreviousFocusIntent':
         return ({positionalArgs, namedArgs, typeArgs}) => PreviousFocusIntent();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -676,18 +779,20 @@ extension PreviousFocusIntentBinding on PreviousFocusIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PreviousFocusIntent');
+        return const HTType('PreviousFocusIntent');
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -701,7 +806,7 @@ class PreviousFocusActionAutoBinding extends HTExternalClass {
       case 'PreviousFocusAction':
         return ({positionalArgs, namedArgs, typeArgs}) => PreviousFocusAction();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -712,8 +817,8 @@ class PreviousFocusActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -722,30 +827,37 @@ extension PreviousFocusActionBinding on PreviousFocusAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PreviousFocusAction');
+        return const HTType('PreviousFocusAction');
       case 'intentType':
         return intentType;
       case 'invoke':
-        return ({positionalArgs, namedArgs, typeArgs}) => invoke(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invoke(positionalArgs[0]);
       case 'isEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => isEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isEnabled(positionalArgs[0]);
       case 'consumesKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumesKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            consumesKey(positionalArgs[0]);
       case 'addActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addActionListener(positionalArgs[0]);
       case 'removeActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeActionListener(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -757,10 +869,13 @@ class DirectionalFocusIntentAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DirectionalFocusIntent':
-        return ({positionalArgs, namedArgs, typeArgs}) => DirectionalFocusIntent(positionalArgs[0],
-            ignoreTextFields: namedArgs.containsKey('ignoreTextFields') ? namedArgs['ignoreTextFields'] : true);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DirectionalFocusIntent(positionalArgs[0],
+                ignoreTextFields: namedArgs.containsKey('ignoreTextFields')
+                    ? namedArgs['ignoreTextFields']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -774,7 +889,7 @@ extension DirectionalFocusIntentBinding on DirectionalFocusIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DirectionalFocusIntent');
+        return const HTType('DirectionalFocusIntent');
       case 'direction':
         return direction;
       case 'ignoreTextFields':
@@ -782,14 +897,16 @@ extension DirectionalFocusIntentBinding on DirectionalFocusIntent {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -801,9 +918,10 @@ class DirectionalFocusActionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DirectionalFocusAction':
-        return ({positionalArgs, namedArgs, typeArgs}) => DirectionalFocusAction();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DirectionalFocusAction();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -814,8 +932,8 @@ class DirectionalFocusActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -824,30 +942,37 @@ extension DirectionalFocusActionBinding on DirectionalFocusAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DirectionalFocusAction');
+        return const HTType('DirectionalFocusAction');
       case 'intentType':
         return intentType;
       case 'invoke':
-        return ({positionalArgs, namedArgs, typeArgs}) => invoke(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invoke(positionalArgs[0]);
       case 'isEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => isEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isEnabled(positionalArgs[0]);
       case 'consumesKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumesKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            consumesKey(positionalArgs[0]);
       case 'addActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addActionListener(positionalArgs[0]);
       case 'removeActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeActionListener(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/form.g.dart b/lib/bindings/flutter/widgets/form.g.dart
index 2f8fccb..0b9309d 100644
--- a/lib/bindings/flutter/widgets/form.g.dart
+++ b/lib/bindings/flutter/widgets/form.g.dart
@@ -16,7 +16,7 @@ class AutovalidateModeAutoBinding extends HTExternalClass {
       case 'AutovalidateMode.onUserInteraction':
         return AutovalidateMode.onUserInteraction;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class AutovalidateModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AutovalidateMode');
+        return const HTType('AutovalidateMode');
       case 'index':
         return (instance as AutovalidateMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as AutovalidateMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as AutovalidateMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -45,13 +46,20 @@ class FormAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Form(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            onWillPop: namedArgs.containsKey('onWillPop') ? namedArgs['onWillPop'] : null,
-            onChanged: namedArgs.containsKey('onChanged') ? namedArgs['onChanged'] : null,
-            autovalidateMode: namedArgs.containsKey('autovalidateMode') ? namedArgs['autovalidateMode'] : null);
+            onWillPop: namedArgs.containsKey('onWillPop')
+                ? namedArgs['onWillPop']
+                : null,
+            onChanged: namedArgs.containsKey('onChanged')
+                ? namedArgs['onChanged']
+                : null,
+            autovalidateMode: namedArgs.containsKey('autovalidateMode')
+                ? namedArgs['autovalidateMode']
+                : null);
       case 'Form.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Form.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Form.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,9 +70,10 @@ class FormAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'WillPopCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Future<bool>,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'WillPopCallback': (HTFunction function) => () => function
+          .call(positionalArgs: const [], namedArgs: const {}) as Future<bool>,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -73,7 +82,7 @@ extension FormBinding on Form {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Form');
+        return const HTType('Form');
       case 'child':
         return child;
       case 'onWillPop':
@@ -93,25 +102,37 @@ extension FormBinding on Form {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -125,7 +146,7 @@ class FormStateAutoBinding extends HTExternalClass {
       case 'FormState':
         return ({positionalArgs, namedArgs, typeArgs}) => FormState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -139,7 +160,7 @@ extension FormStateBinding on FormState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FormState');
+        return const HTType('FormState');
       case 'widget':
         return widget;
       case 'context':
@@ -147,7 +168,8 @@ extension FormStateBinding on FormState {
       case 'mounted':
         return mounted;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'save':
         return ({positionalArgs, namedArgs, typeArgs}) => save();
       case 'reset':
@@ -155,18 +177,21 @@ extension FormStateBinding on FormState {
       case 'validate':
         return ({positionalArgs, namedArgs, typeArgs}) => validate();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/framework.g.dart b/lib/bindings/flutter/widgets/framework.g.dart
index 9ffe337..8fdffa6 100644
--- a/lib/bindings/flutter/widgets/framework.g.dart
+++ b/lib/bindings/flutter/widgets/framework.g.dart
@@ -12,7 +12,7 @@ class UniqueKeyAutoBinding extends HTExternalClass {
       case 'UniqueKey':
         return ({positionalArgs, namedArgs, typeArgs}) => UniqueKey();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,11 +26,11 @@ extension UniqueKeyBinding on UniqueKey {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UniqueKey');
+        return const HTType('UniqueKey');
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -42,9 +42,10 @@ class ObjectKeyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ObjectKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => ObjectKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ObjectKey(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -58,7 +59,7 @@ extension ObjectKeyBinding on ObjectKey {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ObjectKey');
+        return const HTType('ObjectKey');
       case 'value':
         return value;
       case 'hashCode':
@@ -66,7 +67,7 @@ extension ObjectKeyBinding on ObjectKey {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,10 +80,14 @@ class BuildOwnerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'BuildOwner':
         return ({positionalArgs, namedArgs, typeArgs}) => BuildOwner(
-            onBuildScheduled: namedArgs.containsKey('onBuildScheduled') ? namedArgs['onBuildScheduled'] : null,
-            focusManager: namedArgs.containsKey('focusManager') ? namedArgs['focusManager'] : null);
+            onBuildScheduled: namedArgs.containsKey('onBuildScheduled')
+                ? namedArgs['onBuildScheduled']
+                : null,
+            focusManager: namedArgs.containsKey('focusManager')
+                ? namedArgs['focusManager']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -98,7 +103,8 @@ class BuildOwnerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -107,7 +113,7 @@ extension BuildOwnerBinding on BuildOwner {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BuildOwner');
+        return const HTType('BuildOwner');
       case 'onBuildScheduled':
         return onBuildScheduled;
       case 'focusManager':
@@ -115,18 +121,22 @@ extension BuildOwnerBinding on BuildOwner {
       case 'debugBuilding':
         return debugBuilding;
       case 'scheduleBuildFor':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleBuildFor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleBuildFor(positionalArgs[0]);
       case 'lockState':
-        return ({positionalArgs, namedArgs, typeArgs}) => lockState(positionalArgs[0]);
-      case 'buildScope':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            buildScope(positionalArgs[0], positionalArgs.length > 1 ? positionalArgs[1] : null);
+            lockState(positionalArgs[0]);
+      case 'buildScope':
+        return ({positionalArgs, namedArgs, typeArgs}) => buildScope(
+            positionalArgs[0],
+            positionalArgs.length > 1 ? positionalArgs[1] : null);
       case 'finalizeTree':
         return ({positionalArgs, namedArgs, typeArgs}) => finalizeTree();
       case 'reassemble':
-        return ({positionalArgs, namedArgs, typeArgs}) => reassemble(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            reassemble(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -139,7 +149,7 @@ extension BuildOwnerBinding on BuildOwner {
         focusManager = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -151,25 +161,31 @@ class ErrorWidgetAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ErrorWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => ErrorWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ErrorWidget(positionalArgs[0]);
       case 'ErrorWidget.withDetails':
-        return ({positionalArgs, namedArgs, typeArgs}) => ErrorWidget.withDetails(
-            message: namedArgs.containsKey('message') ? namedArgs['message'] : '',
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ErrorWidget.withDetails(
+                message: namedArgs.containsKey('message')
+                    ? namedArgs['message']
+                    : '',
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'ErrorWidget.builder':
         return ErrorWidget.builder;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
   @override
-  void memberSet(String varName, dynamic value, {String from = HTLexicon.global}) {
+  void memberSet(String varName, dynamic value,
+      {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ErrorWidget.builder':
         return ErrorWidget.builder = value;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -183,7 +199,7 @@ extension ErrorWidgetBinding on ErrorWidget {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ErrorWidget');
+        return const HTType('ErrorWidget');
       case 'message':
         return message;
       case 'key':
@@ -191,31 +207,44 @@ extension ErrorWidgetBinding on ErrorWidget {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -227,9 +256,10 @@ class StatelessElementAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StatelessElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => StatelessElement(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StatelessElement(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -240,8 +270,8 @@ class StatelessElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
@@ -250,7 +280,7 @@ extension StatelessElementBinding on StatelessElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StatelessElement');
+        return const HTType('StatelessElement');
       case 'widget':
         return widget;
       case 'debugDoingBuild':
@@ -272,35 +302,52 @@ extension StatelessElementBinding on StatelessElement {
       case 'build':
         return ({positionalArgs, namedArgs, typeArgs}) => build();
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'deactivate':
@@ -312,29 +359,44 @@ extension StatelessElementBinding on StatelessElement {
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -342,27 +404,40 @@ extension StatelessElementBinding on StatelessElement {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'markNeedsBuild':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsBuild();
       case 'rebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -374,9 +449,10 @@ class StatefulElementAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'StatefulElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => StatefulElement(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            StatefulElement(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -387,8 +463,8 @@ class StatefulElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
@@ -397,7 +473,7 @@ extension StatefulElementBinding on StatefulElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('StatefulElement');
+        return const HTType('StatefulElement');
       case 'state':
         return state;
       case 'debugDoingBuild':
@@ -425,7 +501,8 @@ extension StatefulElementBinding on StatefulElement {
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'deactivate':
@@ -433,87 +510,131 @@ extension StatefulElementBinding on StatefulElement {
       case 'unmount':
         return ({positionalArgs, namedArgs, typeArgs}) => unmount();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'debugDeactivated':
         return ({positionalArgs, namedArgs, typeArgs}) => debugDeactivated();
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'markNeedsBuild':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsBuild();
       case 'rebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -525,9 +646,10 @@ class InheritedElementAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'InheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => InheritedElement(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            InheritedElement(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -538,8 +660,8 @@ class InheritedElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
@@ -548,7 +670,7 @@ extension InheritedElementBinding on InheritedElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InheritedElement');
+        return const HTType('InheritedElement');
       case 'widget':
         return widget;
       case 'debugDoingBuild':
@@ -570,41 +692,60 @@ extension InheritedElementBinding on InheritedElement {
       case 'debugDeactivated':
         return ({positionalArgs, namedArgs, typeArgs}) => debugDeactivated();
       case 'updated':
-        return ({positionalArgs, namedArgs, typeArgs}) => updated(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updated(positionalArgs[0]);
       case 'notifyClients':
-        return ({positionalArgs, namedArgs, typeArgs}) => notifyClients(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            notifyClients(positionalArgs[0]);
       case 'build':
         return ({positionalArgs, namedArgs, typeArgs}) => build();
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'deactivate':
@@ -614,29 +755,44 @@ extension InheritedElementBinding on InheritedElement {
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -644,27 +800,40 @@ extension InheritedElementBinding on InheritedElement {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'markNeedsBuild':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsBuild();
       case 'rebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -676,9 +845,10 @@ class LeafRenderObjectElementAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LeafRenderObjectElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => LeafRenderObjectElement(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LeafRenderObjectElement(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -689,8 +859,8 @@ class LeafRenderObjectElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
@@ -699,7 +869,7 @@ extension LeafRenderObjectElementBinding on LeafRenderObjectElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LeafRenderObjectElement');
+        return const HTType('LeafRenderObjectElement');
       case 'widget':
         return widget;
       case 'renderObject':
@@ -719,20 +889,26 @@ extension LeafRenderObjectElementBinding on LeafRenderObjectElement {
       case 'dirty':
         return dirty;
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'insertRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
-      case 'moveRenderObjectChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            moveRenderObjectChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+      case 'moveRenderObjectChild':
+        return ({positionalArgs, namedArgs, typeArgs}) => moveRenderObjectChild(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'removeRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'deactivate':
@@ -740,29 +916,44 @@ extension LeafRenderObjectElementBinding on LeafRenderObjectElement {
       case 'unmount':
         return ({positionalArgs, namedArgs, typeArgs}) => unmount();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'debugDeactivated':
@@ -770,29 +961,44 @@ extension LeafRenderObjectElementBinding on LeafRenderObjectElement {
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -805,32 +1011,45 @@ extension LeafRenderObjectElementBinding on LeafRenderObjectElement {
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class SingleChildRenderObjectElementAutoBinding extends HTExternalClass {
-  SingleChildRenderObjectElementAutoBinding() : super('SingleChildRenderObjectElement');
+  SingleChildRenderObjectElementAutoBinding()
+      : super('SingleChildRenderObjectElement');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SingleChildRenderObjectElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => SingleChildRenderObjectElement(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SingleChildRenderObjectElement(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -841,17 +1060,18 @@ class SingleChildRenderObjectElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
 
-extension SingleChildRenderObjectElementBinding on SingleChildRenderObjectElement {
+extension SingleChildRenderObjectElementBinding
+    on SingleChildRenderObjectElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SingleChildRenderObjectElement');
+        return const HTType('SingleChildRenderObjectElement');
       case 'widget':
         return widget;
       case 'renderObject':
@@ -871,20 +1091,26 @@ extension SingleChildRenderObjectElementBinding on SingleChildRenderObjectElemen
       case 'dirty':
         return dirty;
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'insertRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
-      case 'moveRenderObjectChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            moveRenderObjectChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+      case 'moveRenderObjectChild':
+        return ({positionalArgs, namedArgs, typeArgs}) => moveRenderObjectChild(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'removeRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'deactivate':
@@ -892,27 +1118,41 @@ extension SingleChildRenderObjectElementBinding on SingleChildRenderObjectElemen
       case 'unmount':
         return ({positionalArgs, namedArgs, typeArgs}) => unmount();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'debugDeactivated':
@@ -920,29 +1160,44 @@ extension SingleChildRenderObjectElementBinding on SingleChildRenderObjectElemen
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -950,39 +1205,53 @@ extension SingleChildRenderObjectElementBinding on SingleChildRenderObjectElemen
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'markNeedsBuild':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsBuild();
       case 'rebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class MultiChildRenderObjectElementAutoBinding extends HTExternalClass {
-  MultiChildRenderObjectElementAutoBinding() : super('MultiChildRenderObjectElement');
+  MultiChildRenderObjectElementAutoBinding()
+      : super('MultiChildRenderObjectElement');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'MultiChildRenderObjectElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => MultiChildRenderObjectElement(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MultiChildRenderObjectElement(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -993,17 +1262,18 @@ class MultiChildRenderObjectElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
 
-extension MultiChildRenderObjectElementBinding on MultiChildRenderObjectElement {
+extension MultiChildRenderObjectElementBinding
+    on MultiChildRenderObjectElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MultiChildRenderObjectElement');
+        return const HTType('MultiChildRenderObjectElement');
       case 'widget':
         return widget;
       case 'renderObject':
@@ -1023,20 +1293,26 @@ extension MultiChildRenderObjectElementBinding on MultiChildRenderObjectElement
       case 'dirty':
         return dirty;
       case 'insertRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
-      case 'moveRenderObjectChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            moveRenderObjectChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+      case 'moveRenderObjectChild':
+        return ({positionalArgs, namedArgs, typeArgs}) => moveRenderObjectChild(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'removeRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'deactivate':
@@ -1044,27 +1320,41 @@ extension MultiChildRenderObjectElementBinding on MultiChildRenderObjectElement
       case 'unmount':
         return ({positionalArgs, namedArgs, typeArgs}) => unmount();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'debugDeactivated':
@@ -1072,29 +1362,44 @@ extension MultiChildRenderObjectElementBinding on MultiChildRenderObjectElement
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -1102,25 +1407,37 @@ extension MultiChildRenderObjectElementBinding on MultiChildRenderObjectElement
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'markNeedsBuild':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsBuild();
       case 'rebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1132,9 +1449,10 @@ class DebugCreatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DebugCreator':
-        return ({positionalArgs, namedArgs, typeArgs}) => DebugCreator(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DebugCreator(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1148,13 +1466,13 @@ extension DebugCreatorBinding on DebugCreator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DebugCreator');
+        return const HTType('DebugCreator');
       case 'element':
         return element;
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/gesture_detector.g.dart b/lib/bindings/flutter/widgets/gesture_detector.g.dart
index 5707100..dcd1d6f 100644
--- a/lib/bindings/flutter/widgets/gesture_detector.g.dart
+++ b/lib/bindings/flutter/widgets/gesture_detector.g.dart
@@ -14,54 +14,85 @@ class GestureDetectorAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => GestureDetector(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            onTapDown: namedArgs.containsKey('onTapDown') ? namedArgs['onTapDown'] : null,
-            onTapUp: namedArgs.containsKey('onTapUp') ? namedArgs['onTapUp'] : null,
+            onTapDown: namedArgs.containsKey('onTapDown')
+                ? namedArgs['onTapDown']
+                : null,
+            onTapUp:
+                namedArgs.containsKey('onTapUp') ? namedArgs['onTapUp'] : null,
             onTap: namedArgs.containsKey('onTap') ? namedArgs['onTap'] : null,
-            onTapCancel: namedArgs.containsKey('onTapCancel') ? namedArgs['onTapCancel'] : null,
-            onSecondaryTap: namedArgs.containsKey('onSecondaryTap') ? namedArgs['onSecondaryTap'] : null,
-            onSecondaryTapDown: namedArgs.containsKey('onSecondaryTapDown') ? namedArgs['onSecondaryTapDown'] : null,
-            onSecondaryTapUp: namedArgs.containsKey('onSecondaryTapUp') ? namedArgs['onSecondaryTapUp'] : null,
-            onSecondaryTapCancel:
-                namedArgs.containsKey('onSecondaryTapCancel') ? namedArgs['onSecondaryTapCancel'] : null,
-            onTertiaryTapDown: namedArgs.containsKey('onTertiaryTapDown') ? namedArgs['onTertiaryTapDown'] : null,
-            onTertiaryTapUp: namedArgs.containsKey('onTertiaryTapUp') ? namedArgs['onTertiaryTapUp'] : null,
-            onTertiaryTapCancel: namedArgs.containsKey('onTertiaryTapCancel') ? namedArgs['onTertiaryTapCancel'] : null,
-            onDoubleTapDown: namedArgs.containsKey('onDoubleTapDown') ? namedArgs['onDoubleTapDown'] : null,
-            onDoubleTap: namedArgs.containsKey('onDoubleTap') ? namedArgs['onDoubleTap'] : null,
-            onDoubleTapCancel: namedArgs.containsKey('onDoubleTapCancel') ? namedArgs['onDoubleTapCancel'] : null,
-            onLongPress: namedArgs.containsKey('onLongPress') ? namedArgs['onLongPress'] : null,
-            onLongPressStart: namedArgs.containsKey('onLongPressStart') ? namedArgs['onLongPressStart'] : null,
-            onLongPressMoveUpdate:
-                namedArgs.containsKey('onLongPressMoveUpdate') ? namedArgs['onLongPressMoveUpdate'] : null,
-            onLongPressUp: namedArgs.containsKey('onLongPressUp') ? namedArgs['onLongPressUp'] : null,
-            onLongPressEnd: namedArgs.containsKey('onLongPressEnd') ? namedArgs['onLongPressEnd'] : null,
-            onSecondaryLongPress:
-                namedArgs.containsKey('onSecondaryLongPress') ? namedArgs['onSecondaryLongPress'] : null,
-            onSecondaryLongPressStart:
-                namedArgs.containsKey('onSecondaryLongPressStart') ? namedArgs['onSecondaryLongPressStart'] : null,
+            onTapCancel: namedArgs.containsKey('onTapCancel')
+                ? namedArgs['onTapCancel']
+                : null,
+            onSecondaryTap: namedArgs.containsKey('onSecondaryTap')
+                ? namedArgs['onSecondaryTap']
+                : null,
+            onSecondaryTapDown: namedArgs.containsKey('onSecondaryTapDown')
+                ? namedArgs['onSecondaryTapDown']
+                : null,
+            onSecondaryTapUp: namedArgs.containsKey('onSecondaryTapUp')
+                ? namedArgs['onSecondaryTapUp']
+                : null,
+            onSecondaryTapCancel: namedArgs.containsKey('onSecondaryTapCancel')
+                ? namedArgs['onSecondaryTapCancel']
+                : null,
+            onTertiaryTapDown: namedArgs.containsKey('onTertiaryTapDown')
+                ? namedArgs['onTertiaryTapDown']
+                : null,
+            onTertiaryTapUp: namedArgs.containsKey('onTertiaryTapUp')
+                ? namedArgs['onTertiaryTapUp']
+                : null,
+            onTertiaryTapCancel: namedArgs.containsKey('onTertiaryTapCancel')
+                ? namedArgs['onTertiaryTapCancel']
+                : null,
+            onDoubleTapDown: namedArgs.containsKey('onDoubleTapDown')
+                ? namedArgs['onDoubleTapDown']
+                : null,
+            onDoubleTap: namedArgs.containsKey('onDoubleTap')
+                ? namedArgs['onDoubleTap']
+                : null,
+            onDoubleTapCancel: namedArgs.containsKey('onDoubleTapCancel')
+                ? namedArgs['onDoubleTapCancel']
+                : null,
+            onLongPress: namedArgs.containsKey('onLongPress')
+                ? namedArgs['onLongPress']
+                : null,
+            onLongPressStart: namedArgs.containsKey('onLongPressStart')
+                ? namedArgs['onLongPressStart']
+                : null,
+            onLongPressMoveUpdate: namedArgs.containsKey('onLongPressMoveUpdate')
+                ? namedArgs['onLongPressMoveUpdate']
+                : null,
+            onLongPressUp: namedArgs.containsKey('onLongPressUp')
+                ? namedArgs['onLongPressUp']
+                : null,
+            onLongPressEnd: namedArgs.containsKey('onLongPressEnd')
+                ? namedArgs['onLongPressEnd']
+                : null,
+            onSecondaryLongPress: namedArgs.containsKey('onSecondaryLongPress')
+                ? namedArgs['onSecondaryLongPress']
+                : null,
+            onSecondaryLongPressStart: namedArgs.containsKey('onSecondaryLongPressStart')
+                ? namedArgs['onSecondaryLongPressStart']
+                : null,
             onSecondaryLongPressMoveUpdate: namedArgs.containsKey('onSecondaryLongPressMoveUpdate')
                 ? namedArgs['onSecondaryLongPressMoveUpdate']
                 : null,
-            onSecondaryLongPressUp:
-                namedArgs.containsKey('onSecondaryLongPressUp') ? namedArgs['onSecondaryLongPressUp'] : null,
-            onSecondaryLongPressEnd:
-                namedArgs.containsKey('onSecondaryLongPressEnd') ? namedArgs['onSecondaryLongPressEnd'] : null,
+            onSecondaryLongPressUp: namedArgs.containsKey('onSecondaryLongPressUp')
+                ? namedArgs['onSecondaryLongPressUp']
+                : null,
+            onSecondaryLongPressEnd: namedArgs.containsKey('onSecondaryLongPressEnd')
+                ? namedArgs['onSecondaryLongPressEnd']
+                : null,
             onVerticalDragDown: namedArgs.containsKey('onVerticalDragDown') ? namedArgs['onVerticalDragDown'] : null,
             onVerticalDragStart: namedArgs.containsKey('onVerticalDragStart') ? namedArgs['onVerticalDragStart'] : null,
-            onVerticalDragUpdate:
-                namedArgs.containsKey('onVerticalDragUpdate') ? namedArgs['onVerticalDragUpdate'] : null,
+            onVerticalDragUpdate: namedArgs.containsKey('onVerticalDragUpdate') ? namedArgs['onVerticalDragUpdate'] : null,
             onVerticalDragEnd: namedArgs.containsKey('onVerticalDragEnd') ? namedArgs['onVerticalDragEnd'] : null,
-            onVerticalDragCancel:
-                namedArgs.containsKey('onVerticalDragCancel') ? namedArgs['onVerticalDragCancel'] : null,
-            onHorizontalDragDown:
-                namedArgs.containsKey('onHorizontalDragDown') ? namedArgs['onHorizontalDragDown'] : null,
-            onHorizontalDragStart:
-                namedArgs.containsKey('onHorizontalDragStart') ? namedArgs['onHorizontalDragStart'] : null,
-            onHorizontalDragUpdate:
-                namedArgs.containsKey('onHorizontalDragUpdate') ? namedArgs['onHorizontalDragUpdate'] : null,
+            onVerticalDragCancel: namedArgs.containsKey('onVerticalDragCancel') ? namedArgs['onVerticalDragCancel'] : null,
+            onHorizontalDragDown: namedArgs.containsKey('onHorizontalDragDown') ? namedArgs['onHorizontalDragDown'] : null,
+            onHorizontalDragStart: namedArgs.containsKey('onHorizontalDragStart') ? namedArgs['onHorizontalDragStart'] : null,
+            onHorizontalDragUpdate: namedArgs.containsKey('onHorizontalDragUpdate') ? namedArgs['onHorizontalDragUpdate'] : null,
             onHorizontalDragEnd: namedArgs.containsKey('onHorizontalDragEnd') ? namedArgs['onHorizontalDragEnd'] : null,
-            onHorizontalDragCancel:
-                namedArgs.containsKey('onHorizontalDragCancel') ? namedArgs['onHorizontalDragCancel'] : null,
+            onHorizontalDragCancel: namedArgs.containsKey('onHorizontalDragCancel') ? namedArgs['onHorizontalDragCancel'] : null,
             onForcePressStart: namedArgs.containsKey('onForcePressStart') ? namedArgs['onForcePressStart'] : null,
             onForcePressPeak: namedArgs.containsKey('onForcePressPeak') ? namedArgs['onForcePressPeak'] : null,
             onForcePressUpdate: namedArgs.containsKey('onForcePressUpdate') ? namedArgs['onForcePressUpdate'] : null,
@@ -75,12 +106,10 @@ class GestureDetectorAutoBinding extends HTExternalClass {
             onScaleUpdate: namedArgs.containsKey('onScaleUpdate') ? namedArgs['onScaleUpdate'] : null,
             onScaleEnd: namedArgs.containsKey('onScaleEnd') ? namedArgs['onScaleEnd'] : null,
             behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start);
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -91,47 +120,49 @@ class GestureDetectorAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapDownCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureTapUpCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapDownCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureTapUpCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
       'GestureTapCancelCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
       'GestureLongPressCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureLongPressStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureLongPressStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
       'GestureLongPressMoveUpdateCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+          (details) =>
+              function.call(positionalArgs: [details], namedArgs: const {}),
       'GestureLongPressUpCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureLongPressEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureDragDownCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureDragStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureDragUpdateCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureDragEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureLongPressEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureDragDownCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureDragStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureDragUpdateCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureDragEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
       'GestureDragCancelCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureForcePressStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureForcePressPeakCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureForcePressUpdateCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureForcePressEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureScaleStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureScaleUpdateCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureScaleEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureForcePressStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureForcePressPeakCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureForcePressUpdateCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureForcePressEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureScaleStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureScaleUpdateCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureScaleEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
     };
   }
 }
@@ -140,7 +171,7 @@ extension GestureDetectorBinding on GestureDetector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GestureDetector');
+        return const HTType('GestureDetector');
       case 'child':
         return child;
       case 'onTapDown':
@@ -246,31 +277,44 @@ extension GestureDetectorBinding on GestureDetector {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -285,14 +329,20 @@ class RawGestureDetectorAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RawGestureDetector(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            gestures:
-                namedArgs.containsKey('gestures') ? namedArgs['gestures'] : const <Type, GestureRecognizerFactory>{},
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            semantics: namedArgs.containsKey('semantics') ? namedArgs['semantics'] : null);
+            gestures: namedArgs.containsKey('gestures')
+                ? namedArgs['gestures']
+                : const <Type, GestureRecognizerFactory>{},
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
+            semantics: namedArgs.containsKey('semantics')
+                ? namedArgs['semantics']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -306,7 +356,7 @@ extension RawGestureDetectorBinding on RawGestureDetector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawGestureDetector');
+        return const HTType('RawGestureDetector');
       case 'child':
         return child;
       case 'gestures':
@@ -328,25 +378,37 @@ extension RawGestureDetectorBinding on RawGestureDetector {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -358,9 +420,10 @@ class RawGestureDetectorStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RawGestureDetectorState':
-        return ({positionalArgs, namedArgs, typeArgs}) => RawGestureDetectorState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RawGestureDetectorState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -374,7 +437,7 @@ extension RawGestureDetectorStateBinding on RawGestureDetectorState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawGestureDetectorState');
+        return const HTType('RawGestureDetectorState');
       case 'widget':
         return widget;
       case 'context':
@@ -384,28 +447,35 @@ extension RawGestureDetectorStateBinding on RawGestureDetectorState {
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'replaceGestureRecognizers':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceGestureRecognizers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceGestureRecognizers(positionalArgs[0]);
       case 'replaceSemanticsActions':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceSemanticsActions(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceSemanticsActions(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/grid_paper.g.dart b/lib/bindings/flutter/widgets/grid_paper.g.dart
index 6d004cd..4da5b41 100644
--- a/lib/bindings/flutter/widgets/grid_paper.g.dart
+++ b/lib/bindings/flutter/widgets/grid_paper.g.dart
@@ -10,13 +10,20 @@ class GridPaperAutoBinding extends HTExternalClass {
       case 'GridPaper':
         return ({positionalArgs, namedArgs, typeArgs}) => GridPaper(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : const Color(0x7FC3E8F3),
-            interval: namedArgs.containsKey('interval') ? namedArgs['interval'] : 100.0,
-            divisions: namedArgs.containsKey('divisions') ? namedArgs['divisions'] : 2,
-            subdivisions: namedArgs.containsKey('subdivisions') ? namedArgs['subdivisions'] : 5,
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : const Color(0x7FC3E8F3),
+            interval: namedArgs.containsKey('interval')
+                ? namedArgs['interval']
+                : 100.0,
+            divisions:
+                namedArgs.containsKey('divisions') ? namedArgs['divisions'] : 2,
+            subdivisions: namedArgs.containsKey('subdivisions')
+                ? namedArgs['subdivisions']
+                : 5,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +37,7 @@ extension GridPaperBinding on GridPaper {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GridPaper');
+        return const HTType('GridPaper');
       case 'color':
         return color;
       case 'interval':
@@ -46,31 +53,44 @@ extension GridPaperBinding on GridPaper {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/heroes.g.dart b/lib/bindings/flutter/widgets/heroes.g.dart
index b8a2ef0..5e50213 100644
--- a/lib/bindings/flutter/widgets/heroes.g.dart
+++ b/lib/bindings/flutter/widgets/heroes.g.dart
@@ -15,7 +15,7 @@ class HeroFlightDirectionAutoBinding extends HTExternalClass {
       case 'HeroFlightDirection.pop':
         return HeroFlightDirection.pop;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,13 +23,14 @@ class HeroFlightDirectionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HeroFlightDirection');
+        return const HTType('HeroFlightDirection');
       case 'index':
         return (instance as HeroFlightDirection).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as HeroFlightDirection).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as HeroFlightDirection).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,15 +45,22 @@ class HeroAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Hero(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             tag: namedArgs['tag'],
-            createRectTween: namedArgs.containsKey('createRectTween') ? namedArgs['createRectTween'] : null,
-            flightShuttleBuilder:
-                namedArgs.containsKey('flightShuttleBuilder') ? namedArgs['flightShuttleBuilder'] : null,
-            placeholderBuilder: namedArgs.containsKey('placeholderBuilder') ? namedArgs['placeholderBuilder'] : null,
+            createRectTween: namedArgs.containsKey('createRectTween')
+                ? namedArgs['createRectTween']
+                : null,
+            flightShuttleBuilder: namedArgs.containsKey('flightShuttleBuilder')
+                ? namedArgs['flightShuttleBuilder']
+                : null,
+            placeholderBuilder: namedArgs.containsKey('placeholderBuilder')
+                ? namedArgs['placeholderBuilder']
+                : null,
             transitionOnUserGestures:
-                namedArgs.containsKey('transitionOnUserGestures') ? namedArgs['transitionOnUserGestures'] : false,
+                namedArgs.containsKey('transitionOnUserGestures')
+                    ? namedArgs['transitionOnUserGestures']
+                    : false,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -63,14 +71,22 @@ class HeroAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'CreateRectTween': (HTFunction function) =>
-          (begin, end) => function.call(positionalArgs: [begin, end], namedArgs: const {}) as Tween<Rect?>,
-      'HeroFlightShuttleBuilder': (HTFunction function) =>
-          (flightContext, animation, flightDirection, fromHeroContext, toHeroContext) => function.call(
-              positionalArgs: [flightContext, animation, flightDirection, fromHeroContext, toHeroContext],
+      'CreateRectTween': (HTFunction function) => (begin, end) =>
+          function.call(positionalArgs: [begin, end], namedArgs: const {})
+              as Tween<Rect?>,
+      'HeroFlightShuttleBuilder': (HTFunction function) => (flightContext,
+              animation, flightDirection, fromHeroContext, toHeroContext) =>
+          function.call(positionalArgs: [
+            flightContext,
+            animation,
+            flightDirection,
+            fromHeroContext,
+            toHeroContext
+          ], namedArgs: const {}) as Widget,
+      'HeroPlaceholderBuilder': (HTFunction function) =>
+          (context, heroSize, child) => function.call(
+              positionalArgs: [context, heroSize, child],
               namedArgs: const {}) as Widget,
-      'HeroPlaceholderBuilder': (HTFunction function) => (context, heroSize, child) =>
-          function.call(positionalArgs: [context, heroSize, child], namedArgs: const {}) as Widget,
     };
   }
 }
@@ -79,7 +95,7 @@ extension HeroBinding on Hero {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Hero');
+        return const HTType('Hero');
       case 'tag':
         return tag;
       case 'createRectTween':
@@ -99,29 +115,41 @@ extension HeroBinding on Hero {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -134,9 +162,11 @@ class HeroControllerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'HeroController':
         return ({positionalArgs, namedArgs, typeArgs}) => HeroController(
-            createRectTween: namedArgs.containsKey('createRectTween') ? namedArgs['createRectTween'] : null);
+            createRectTween: namedArgs.containsKey('createRectTween')
+                ? namedArgs['createRectTween']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -147,8 +177,9 @@ class HeroControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'CreateRectTween': (HTFunction function) =>
-          (begin, end) => function.call(positionalArgs: [begin, end], namedArgs: const {}) as Tween<Rect?>,
+      'CreateRectTween': (HTFunction function) => (begin, end) =>
+          function.call(positionalArgs: [begin, end], namedArgs: const {})
+              as Tween<Rect?>,
     };
   }
 }
@@ -157,27 +188,35 @@ extension HeroControllerBinding on HeroController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HeroController');
+        return const HTType('HeroController');
       case 'createRectTween':
         return createRectTween;
       case 'navigator':
         return navigator;
       case 'didPush':
-        return ({positionalArgs, namedArgs, typeArgs}) => didPush(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didPush(positionalArgs[0], positionalArgs[1]);
       case 'didPop':
-        return ({positionalArgs, namedArgs, typeArgs}) => didPop(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didPop(positionalArgs[0], positionalArgs[1]);
       case 'didReplace':
         return ({positionalArgs, namedArgs, typeArgs}) => didReplace(
-            newRoute: namedArgs.containsKey('newRoute') ? namedArgs['newRoute'] : null,
-            oldRoute: namedArgs.containsKey('oldRoute') ? namedArgs['oldRoute'] : null);
+            newRoute: namedArgs.containsKey('newRoute')
+                ? namedArgs['newRoute']
+                : null,
+            oldRoute: namedArgs.containsKey('oldRoute')
+                ? namedArgs['oldRoute']
+                : null);
       case 'didStartUserGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStartUserGesture(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStartUserGesture(positionalArgs[0], positionalArgs[1]);
       case 'didStopUserGesture':
         return ({positionalArgs, namedArgs, typeArgs}) => didStopUserGesture();
       case 'didRemove':
-        return ({positionalArgs, namedArgs, typeArgs}) => didRemove(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didRemove(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -192,9 +231,10 @@ class HeroModeAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => HeroMode(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            enabled: namedArgs.containsKey('enabled') ? namedArgs['enabled'] : true);
+            enabled:
+                namedArgs.containsKey('enabled') ? namedArgs['enabled'] : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -208,7 +248,7 @@ extension HeroModeBinding on HeroMode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HeroMode');
+        return const HTType('HeroMode');
       case 'child':
         return child;
       case 'enabled':
@@ -218,31 +258,44 @@ extension HeroModeBinding on HeroMode {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/icon.g.dart b/lib/bindings/flutter/widgets/icon.g.dart
index 0c55bbb..6177db0 100644
--- a/lib/bindings/flutter/widgets/icon.g.dart
+++ b/lib/bindings/flutter/widgets/icon.g.dart
@@ -9,14 +9,19 @@ class IconAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Icon':
-        return ({positionalArgs, namedArgs, typeArgs}) => Icon(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => Icon(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null);
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +35,7 @@ extension IconBinding on Icon {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Icon');
+        return const HTType('Icon');
       case 'icon':
         return icon;
       case 'size':
@@ -46,31 +51,44 @@ extension IconBinding on Icon {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/icon_data.g.dart b/lib/bindings/flutter/widgets/icon_data.g.dart
index 9fe6db5..659e4dc 100644
--- a/lib/bindings/flutter/widgets/icon_data.g.dart
+++ b/lib/bindings/flutter/widgets/icon_data.g.dart
@@ -9,12 +9,19 @@ class IconDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IconData':
-        return ({positionalArgs, namedArgs, typeArgs}) => IconData(positionalArgs[0],
-            fontFamily: namedArgs.containsKey('fontFamily') ? namedArgs['fontFamily'] : null,
-            fontPackage: namedArgs.containsKey('fontPackage') ? namedArgs['fontPackage'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => IconData(
+            positionalArgs[0],
+            fontFamily: namedArgs.containsKey('fontFamily')
+                ? namedArgs['fontFamily']
+                : null,
+            fontPackage: namedArgs.containsKey('fontPackage')
+                ? namedArgs['fontPackage']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +35,7 @@ extension IconDataBinding on IconData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IconData');
+        return const HTType('IconData');
       case 'codePoint':
         return codePoint;
       case 'fontFamily':
@@ -42,7 +49,7 @@ extension IconDataBinding on IconData {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -54,13 +61,21 @@ class IconDataPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IconDataProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => IconDataProperty(positionalArgs[0], positionalArgs[1],
-            ifNull: namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.singleLine,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => IconDataProperty(
+            positionalArgs[0], positionalArgs[1],
+            ifNull:
+                namedArgs.containsKey('ifNull') ? namedArgs['ifNull'] : null,
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.singleLine,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -74,7 +89,7 @@ extension IconDataPropertyBinding on IconDataProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IconDataProperty');
+        return const HTType('IconDataProperty');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -114,33 +129,49 @@ extension IconDataPropertyBinding on IconDataProperty {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/icon_theme.g.dart b/lib/bindings/flutter/widgets/icon_theme.g.dart
index bab8226..9374f94 100644
--- a/lib/bindings/flutter/widgets/icon_theme.g.dart
+++ b/lib/bindings/flutter/widgets/icon_theme.g.dart
@@ -19,9 +19,10 @@ class IconThemeAutoBinding extends HTExternalClass {
             data: namedArgs.containsKey('data') ? namedArgs['data'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'IconTheme.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => IconTheme.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            IconTheme.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +36,7 @@ extension IconThemeBinding on IconTheme {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IconTheme');
+        return const HTType('IconTheme');
       case 'data':
         return data;
       case 'child':
@@ -45,33 +46,47 @@ extension IconThemeBinding on IconTheme {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/icon_theme_data.g.dart b/lib/bindings/flutter/widgets/icon_theme_data.g.dart
index 1614e43..d4e10f8 100644
--- a/lib/bindings/flutter/widgets/icon_theme_data.g.dart
+++ b/lib/bindings/flutter/widgets/icon_theme_data.g.dart
@@ -11,15 +11,17 @@ class IconThemeDataAutoBinding extends HTExternalClass {
       case 'IconThemeData':
         return ({positionalArgs, namedArgs, typeArgs}) => IconThemeData(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            opacity: namedArgs.containsKey('opacity') ? namedArgs['opacity'] : null,
+            opacity:
+                namedArgs.containsKey('opacity') ? namedArgs['opacity'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null);
       case 'IconThemeData.fallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => IconThemeData.fallback();
-      case 'IconThemeData.lerp':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            IconThemeData.lerp(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            IconThemeData.fallback();
+      case 'IconThemeData.lerp':
+        return ({positionalArgs, namedArgs, typeArgs}) => IconThemeData.lerp(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +35,7 @@ extension IconThemeDataBinding on IconThemeData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IconThemeData');
+        return const HTType('IconThemeData');
       case 'color':
         return color;
       case 'size':
@@ -47,25 +49,31 @@ extension IconThemeDataBinding on IconThemeData {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            opacity: namedArgs.containsKey('opacity') ? namedArgs['opacity'] : null,
+            opacity:
+                namedArgs.containsKey('opacity') ? namedArgs['opacity'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null);
       case 'merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => merge(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            merge(positionalArgs[0]);
       case 'resolve':
-        return ({positionalArgs, namedArgs, typeArgs}) => resolve(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            resolve(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/image.g.dart b/lib/bindings/flutter/widgets/image.g.dart
index 3a523cb..e22564f 100644
--- a/lib/bindings/flutter/widgets/image.g.dart
+++ b/lib/bindings/flutter/widgets/image.g.dart
@@ -12,122 +12,269 @@ class ImageAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Image(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             image: namedArgs['image'],
-            frameBuilder: namedArgs.containsKey('frameBuilder') ? namedArgs['frameBuilder'] : null,
-            loadingBuilder: namedArgs.containsKey('loadingBuilder') ? namedArgs['loadingBuilder'] : null,
-            errorBuilder: namedArgs.containsKey('errorBuilder') ? namedArgs['errorBuilder'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
+            frameBuilder: namedArgs.containsKey('frameBuilder')
+                ? namedArgs['frameBuilder']
+                : null,
+            loadingBuilder: namedArgs.containsKey('loadingBuilder')
+                ? namedArgs['loadingBuilder']
+                : null,
+            errorBuilder: namedArgs.containsKey('errorBuilder')
+                ? namedArgs['errorBuilder']
+                : null,
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            colorBlendMode: namedArgs.containsKey('colorBlendMode') ? namedArgs['colorBlendMode'] : null,
+            colorBlendMode: namedArgs.containsKey('colorBlendMode')
+                ? namedArgs['colorBlendMode']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            gaplessPlayback: namedArgs.containsKey('gaplessPlayback') ? namedArgs['gaplessPlayback'] : false,
-            isAntiAlias: namedArgs.containsKey('isAntiAlias') ? namedArgs['isAntiAlias'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            gaplessPlayback: namedArgs.containsKey('gaplessPlayback')
+                ? namedArgs['gaplessPlayback']
+                : false,
+            isAntiAlias: namedArgs.containsKey('isAntiAlias')
+                ? namedArgs['isAntiAlias']
+                : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low);
       case 'Image.network':
-        return ({positionalArgs, namedArgs, typeArgs}) => Image.network(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => Image.network(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
-            frameBuilder: namedArgs.containsKey('frameBuilder') ? namedArgs['frameBuilder'] : null,
-            loadingBuilder: namedArgs.containsKey('loadingBuilder') ? namedArgs['loadingBuilder'] : null,
-            errorBuilder: namedArgs.containsKey('errorBuilder') ? namedArgs['errorBuilder'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
+            frameBuilder: namedArgs.containsKey('frameBuilder')
+                ? namedArgs['frameBuilder']
+                : null,
+            loadingBuilder: namedArgs.containsKey('loadingBuilder')
+                ? namedArgs['loadingBuilder']
+                : null,
+            errorBuilder: namedArgs.containsKey('errorBuilder')
+                ? namedArgs['errorBuilder']
+                : null,
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            colorBlendMode: namedArgs.containsKey('colorBlendMode') ? namedArgs['colorBlendMode'] : null,
+            colorBlendMode: namedArgs.containsKey('colorBlendMode')
+                ? namedArgs['colorBlendMode']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            gaplessPlayback: namedArgs.containsKey('gaplessPlayback') ? namedArgs['gaplessPlayback'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low,
-            isAntiAlias: namedArgs.containsKey('isAntiAlias') ? namedArgs['isAntiAlias'] : false,
-            headers: namedArgs.containsKey('headers') ? namedArgs['headers'] : null,
-            cacheWidth: namedArgs.containsKey('cacheWidth') ? namedArgs['cacheWidth'] : null,
-            cacheHeight: namedArgs.containsKey('cacheHeight') ? namedArgs['cacheHeight'] : null);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            gaplessPlayback: namedArgs.containsKey('gaplessPlayback')
+                ? namedArgs['gaplessPlayback']
+                : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low,
+            isAntiAlias: namedArgs.containsKey('isAntiAlias')
+                ? namedArgs['isAntiAlias']
+                : false,
+            headers:
+                namedArgs.containsKey('headers') ? namedArgs['headers'] : null,
+            cacheWidth: namedArgs.containsKey('cacheWidth')
+                ? namedArgs['cacheWidth']
+                : null,
+            cacheHeight: namedArgs.containsKey('cacheHeight')
+                ? namedArgs['cacheHeight']
+                : null);
       case 'Image.file':
-        return ({positionalArgs, namedArgs, typeArgs}) => Image.file(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => Image.file(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
-            frameBuilder: namedArgs.containsKey('frameBuilder') ? namedArgs['frameBuilder'] : null,
-            errorBuilder: namedArgs.containsKey('errorBuilder') ? namedArgs['errorBuilder'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
+            frameBuilder: namedArgs.containsKey('frameBuilder')
+                ? namedArgs['frameBuilder']
+                : null,
+            errorBuilder: namedArgs.containsKey('errorBuilder')
+                ? namedArgs['errorBuilder']
+                : null,
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            colorBlendMode: namedArgs.containsKey('colorBlendMode') ? namedArgs['colorBlendMode'] : null,
+            colorBlendMode: namedArgs.containsKey('colorBlendMode')
+                ? namedArgs['colorBlendMode']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            gaplessPlayback: namedArgs.containsKey('gaplessPlayback') ? namedArgs['gaplessPlayback'] : false,
-            isAntiAlias: namedArgs.containsKey('isAntiAlias') ? namedArgs['isAntiAlias'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low,
-            cacheWidth: namedArgs.containsKey('cacheWidth') ? namedArgs['cacheWidth'] : null,
-            cacheHeight: namedArgs.containsKey('cacheHeight') ? namedArgs['cacheHeight'] : null);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            gaplessPlayback: namedArgs.containsKey('gaplessPlayback')
+                ? namedArgs['gaplessPlayback']
+                : false,
+            isAntiAlias: namedArgs.containsKey('isAntiAlias')
+                ? namedArgs['isAntiAlias']
+                : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low,
+            cacheWidth: namedArgs.containsKey('cacheWidth')
+                ? namedArgs['cacheWidth']
+                : null,
+            cacheHeight: namedArgs.containsKey('cacheHeight')
+                ? namedArgs['cacheHeight']
+                : null);
       case 'Image.asset':
-        return ({positionalArgs, namedArgs, typeArgs}) => Image.asset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => Image.asset(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            bundle: namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
-            frameBuilder: namedArgs.containsKey('frameBuilder') ? namedArgs['frameBuilder'] : null,
-            errorBuilder: namedArgs.containsKey('errorBuilder') ? namedArgs['errorBuilder'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
+            bundle:
+                namedArgs.containsKey('bundle') ? namedArgs['bundle'] : null,
+            frameBuilder: namedArgs.containsKey('frameBuilder')
+                ? namedArgs['frameBuilder']
+                : null,
+            errorBuilder: namedArgs.containsKey('errorBuilder')
+                ? namedArgs['errorBuilder']
+                : null,
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            colorBlendMode: namedArgs.containsKey('colorBlendMode') ? namedArgs['colorBlendMode'] : null,
+            colorBlendMode: namedArgs.containsKey('colorBlendMode')
+                ? namedArgs['colorBlendMode']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            gaplessPlayback: namedArgs.containsKey('gaplessPlayback') ? namedArgs['gaplessPlayback'] : false,
-            isAntiAlias: namedArgs.containsKey('isAntiAlias') ? namedArgs['isAntiAlias'] : false,
-            package: namedArgs.containsKey('package') ? namedArgs['package'] : null,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low,
-            cacheWidth: namedArgs.containsKey('cacheWidth') ? namedArgs['cacheWidth'] : null,
-            cacheHeight: namedArgs.containsKey('cacheHeight') ? namedArgs['cacheHeight'] : null);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            gaplessPlayback: namedArgs.containsKey('gaplessPlayback')
+                ? namedArgs['gaplessPlayback']
+                : false,
+            isAntiAlias: namedArgs.containsKey('isAntiAlias')
+                ? namedArgs['isAntiAlias']
+                : false,
+            package:
+                namedArgs.containsKey('package') ? namedArgs['package'] : null,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low,
+            cacheWidth: namedArgs.containsKey('cacheWidth')
+                ? namedArgs['cacheWidth']
+                : null,
+            cacheHeight: namedArgs.containsKey('cacheHeight')
+                ? namedArgs['cacheHeight']
+                : null);
       case 'Image.memory':
-        return ({positionalArgs, namedArgs, typeArgs}) => Image.memory(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => Image.memory(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             scale: namedArgs.containsKey('scale') ? namedArgs['scale'] : 1.0,
-            frameBuilder: namedArgs.containsKey('frameBuilder') ? namedArgs['frameBuilder'] : null,
-            errorBuilder: namedArgs.containsKey('errorBuilder') ? namedArgs['errorBuilder'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
+            frameBuilder: namedArgs.containsKey('frameBuilder')
+                ? namedArgs['frameBuilder']
+                : null,
+            errorBuilder: namedArgs.containsKey('errorBuilder')
+                ? namedArgs['errorBuilder']
+                : null,
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            colorBlendMode: namedArgs.containsKey('colorBlendMode') ? namedArgs['colorBlendMode'] : null,
+            colorBlendMode: namedArgs.containsKey('colorBlendMode')
+                ? namedArgs['colorBlendMode']
+                : null,
             fit: namedArgs.containsKey('fit') ? namedArgs['fit'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
-            repeat: namedArgs.containsKey('repeat') ? namedArgs['repeat'] : ImageRepeat.noRepeat,
-            centerSlice: namedArgs.containsKey('centerSlice') ? namedArgs['centerSlice'] : null,
-            matchTextDirection: namedArgs.containsKey('matchTextDirection') ? namedArgs['matchTextDirection'] : false,
-            gaplessPlayback: namedArgs.containsKey('gaplessPlayback') ? namedArgs['gaplessPlayback'] : false,
-            isAntiAlias: namedArgs.containsKey('isAntiAlias') ? namedArgs['isAntiAlias'] : false,
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low,
-            cacheWidth: namedArgs.containsKey('cacheWidth') ? namedArgs['cacheWidth'] : null,
-            cacheHeight: namedArgs.containsKey('cacheHeight') ? namedArgs['cacheHeight'] : null);
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
+            repeat: namedArgs.containsKey('repeat')
+                ? namedArgs['repeat']
+                : ImageRepeat.noRepeat,
+            centerSlice: namedArgs.containsKey('centerSlice')
+                ? namedArgs['centerSlice']
+                : null,
+            matchTextDirection: namedArgs.containsKey('matchTextDirection')
+                ? namedArgs['matchTextDirection']
+                : false,
+            gaplessPlayback: namedArgs.containsKey('gaplessPlayback')
+                ? namedArgs['gaplessPlayback']
+                : false,
+            isAntiAlias: namedArgs.containsKey('isAntiAlias')
+                ? namedArgs['isAntiAlias']
+                : false,
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low,
+            cacheWidth: namedArgs.containsKey('cacheWidth')
+                ? namedArgs['cacheWidth']
+                : null,
+            cacheHeight: namedArgs.containsKey('cacheHeight')
+                ? namedArgs['cacheHeight']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -138,12 +285,18 @@ class ImageAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ImageFrameBuilder': (HTFunction function) => (context, child, frame, wasSynchronouslyLoaded) =>
-          function.call(positionalArgs: [context, child, frame, wasSynchronouslyLoaded], namedArgs: const {}) as Widget,
-      'ImageLoadingBuilder': (HTFunction function) => (context, child, loadingProgress) =>
-          function.call(positionalArgs: [context, child, loadingProgress], namedArgs: const {}) as Widget,
-      'ImageErrorWidgetBuilder': (HTFunction function) => (context, error, stackTrace) =>
-          function.call(positionalArgs: [context, error, stackTrace], namedArgs: const {}) as Widget,
+      'ImageFrameBuilder': (HTFunction function) =>
+          (context, child, frame, wasSynchronouslyLoaded) => function.call(
+              positionalArgs: [context, child, frame, wasSynchronouslyLoaded],
+              namedArgs: const {}) as Widget,
+      'ImageLoadingBuilder': (HTFunction function) =>
+          (context, child, loadingProgress) => function.call(
+              positionalArgs: [context, child, loadingProgress],
+              namedArgs: const {}) as Widget,
+      'ImageErrorWidgetBuilder': (HTFunction function) =>
+          (context, error, stackTrace) => function.call(
+              positionalArgs: [context, error, stackTrace],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -152,7 +305,7 @@ extension ImageBinding on Image {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Image');
+        return const HTType('Image');
       case 'image':
         return image;
       case 'frameBuilder':
@@ -196,29 +349,41 @@ extension ImageBinding on Image {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/image_filter.g.dart b/lib/bindings/flutter/widgets/image_filter.g.dart
index ec320c5..c28748f 100644
--- a/lib/bindings/flutter/widgets/image_filter.g.dart
+++ b/lib/bindings/flutter/widgets/image_filter.g.dart
@@ -15,7 +15,7 @@ class ImageFilteredAutoBinding extends HTExternalClass {
             imageFilter: namedArgs['imageFilter'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +29,7 @@ extension ImageFilteredBinding on ImageFiltered {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageFiltered');
+        return const HTType('ImageFiltered');
       case 'imageFilter':
         return imageFilter;
       case 'child':
@@ -39,33 +39,47 @@ extension ImageFilteredBinding on ImageFiltered {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/image_icon.g.dart b/lib/bindings/flutter/widgets/image_icon.g.dart
index 4b59b69..ee3d878 100644
--- a/lib/bindings/flutter/widgets/image_icon.g.dart
+++ b/lib/bindings/flutter/widgets/image_icon.g.dart
@@ -9,13 +9,16 @@ class ImageIconAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ImageIcon':
-        return ({positionalArgs, namedArgs, typeArgs}) => ImageIcon(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => ImageIcon(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            semanticLabel: namedArgs.containsKey('semanticLabel') ? namedArgs['semanticLabel'] : null);
+            semanticLabel: namedArgs.containsKey('semanticLabel')
+                ? namedArgs['semanticLabel']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +32,7 @@ extension ImageIconBinding on ImageIcon {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ImageIcon');
+        return const HTType('ImageIcon');
       case 'image':
         return image;
       case 'size':
@@ -43,31 +46,44 @@ extension ImageIconBinding on ImageIcon {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/implicit_animations.g.dart b/lib/bindings/flutter/widgets/implicit_animations.g.dart
index f582633..e7da074 100644
--- a/lib/bindings/flutter/widgets/implicit_animations.g.dart
+++ b/lib/bindings/flutter/widgets/implicit_animations.g.dart
@@ -14,7 +14,7 @@ class BoxConstraintsTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,25 +33,30 @@ extension BoxConstraintsTweenBinding on BoxConstraintsTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BoxConstraintsTween');
+        return const HTType('BoxConstraintsTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -64,7 +69,7 @@ extension BoxConstraintsTweenBinding on BoxConstraintsTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -80,7 +85,7 @@ class DecorationTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -99,25 +104,30 @@ extension DecorationTweenBinding on DecorationTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DecorationTween');
+        return const HTType('DecorationTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -130,7 +140,7 @@ extension DecorationTweenBinding on DecorationTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -146,7 +156,7 @@ class EdgeInsetsTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -165,25 +175,30 @@ extension EdgeInsetsTweenBinding on EdgeInsetsTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EdgeInsetsTween');
+        return const HTType('EdgeInsetsTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -196,7 +211,7 @@ extension EdgeInsetsTweenBinding on EdgeInsetsTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -208,11 +223,13 @@ class EdgeInsetsGeometryTweenAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'EdgeInsetsGeometryTween':
-        return ({positionalArgs, namedArgs, typeArgs}) => EdgeInsetsGeometryTween(
-            begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            EdgeInsetsGeometryTween(
+                begin:
+                    namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
+                end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -231,25 +248,30 @@ extension EdgeInsetsGeometryTweenBinding on EdgeInsetsGeometryTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('EdgeInsetsGeometryTween');
+        return const HTType('EdgeInsetsGeometryTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -262,7 +284,7 @@ extension EdgeInsetsGeometryTweenBinding on EdgeInsetsGeometryTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -278,7 +300,7 @@ class BorderRadiusTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -297,25 +319,30 @@ extension BorderRadiusTweenBinding on BorderRadiusTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BorderRadiusTween');
+        return const HTType('BorderRadiusTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -328,7 +355,7 @@ extension BorderRadiusTweenBinding on BorderRadiusTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -344,7 +371,7 @@ class BorderTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -363,25 +390,30 @@ extension BorderTweenBinding on BorderTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BorderTween');
+        return const HTType('BorderTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -394,7 +426,7 @@ extension BorderTweenBinding on BorderTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -410,7 +442,7 @@ class Matrix4TweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -429,25 +461,30 @@ extension Matrix4TweenBinding on Matrix4Tween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Matrix4Tween');
+        return const HTType('Matrix4Tween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -460,7 +497,7 @@ extension Matrix4TweenBinding on Matrix4Tween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -476,7 +513,7 @@ class TextStyleTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -495,25 +532,30 @@ extension TextStyleTweenBinding on TextStyleTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextStyleTween');
+        return const HTType('TextStyleTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -526,7 +568,7 @@ extension TextStyleTweenBinding on TextStyleTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -540,25 +582,43 @@ class AnimatedContainerAutoBinding extends HTExternalClass {
       case 'AnimatedContainer':
         return ({positionalArgs, namedArgs, typeArgs}) => AnimatedContainer(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            foregroundDecoration:
-                namedArgs.containsKey('foregroundDecoration') ? namedArgs['foregroundDecoration'] : null,
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            foregroundDecoration: namedArgs.containsKey('foregroundDecoration')
+                ? namedArgs['foregroundDecoration']
+                : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            constraints: namedArgs.containsKey('constraints') ? namedArgs['constraints'] : null,
-            margin: namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
-            transform: namedArgs.containsKey('transform') ? namedArgs['transform'] : null,
-            transformAlignment: namedArgs.containsKey('transformAlignment') ? namedArgs['transformAlignment'] : null,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            constraints: namedArgs.containsKey('constraints')
+                ? namedArgs['constraints']
+                : null,
+            margin:
+                namedArgs.containsKey('margin') ? namedArgs['margin'] : null,
+            transform: namedArgs.containsKey('transform')
+                ? namedArgs['transform']
+                : null,
+            transformAlignment: namedArgs.containsKey('transformAlignment')
+                ? namedArgs['transformAlignment']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -569,7 +629,8 @@ class AnimatedContainerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -578,7 +639,7 @@ extension AnimatedContainerBinding on AnimatedContainer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedContainer');
+        return const HTType('AnimatedContainer');
       case 'child':
         return child;
       case 'alignment':
@@ -612,29 +673,41 @@ extension AnimatedContainerBinding on AnimatedContainer {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -650,11 +723,13 @@ class AnimatedPaddingAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             padding: namedArgs['padding'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -665,7 +740,8 @@ class AnimatedPaddingAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -674,7 +750,7 @@ extension AnimatedPaddingBinding on AnimatedPadding {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedPadding');
+        return const HTType('AnimatedPadding');
       case 'padding':
         return padding;
       case 'child':
@@ -692,29 +768,41 @@ extension AnimatedPaddingBinding on AnimatedPadding {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -730,13 +818,19 @@ class AnimatedAlignAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             alignment: namedArgs['alignment'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : null,
-            widthFactor: namedArgs.containsKey('widthFactor') ? namedArgs['widthFactor'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            heightFactor: namedArgs.containsKey('heightFactor')
+                ? namedArgs['heightFactor']
+                : null,
+            widthFactor: namedArgs.containsKey('widthFactor')
+                ? namedArgs['widthFactor']
+                : null,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -747,7 +841,8 @@ class AnimatedAlignAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -756,7 +851,7 @@ extension AnimatedAlignBinding on AnimatedAlign {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedAlign');
+        return const HTType('AnimatedAlign');
       case 'alignment':
         return alignment;
       case 'child':
@@ -778,29 +873,41 @@ extension AnimatedAlignBinding on AnimatedAlign {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -818,22 +925,30 @@ class AnimatedPositionedAutoBinding extends HTExternalClass {
             left: namedArgs.containsKey('left') ? namedArgs['left'] : null,
             top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
             right: namedArgs.containsKey('right') ? namedArgs['right'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
             width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            height:
+                namedArgs.containsKey('height') ? namedArgs['height'] : null,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       case 'AnimatedPositioned.fromRect':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnimatedPositioned.fromRect(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            rect: namedArgs['rect'],
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
-            duration: namedArgs['duration'],
-            onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnimatedPositioned.fromRect(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                rect: namedArgs['rect'],
+                curve: namedArgs.containsKey('curve')
+                    ? namedArgs['curve']
+                    : Curves.linear,
+                duration: namedArgs['duration'],
+                onEnd:
+                    namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -844,7 +959,8 @@ class AnimatedPositionedAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -853,7 +969,7 @@ extension AnimatedPositionedBinding on AnimatedPositioned {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedPositioned');
+        return const HTType('AnimatedPositioned');
       case 'child':
         return child;
       case 'left':
@@ -881,54 +997,77 @@ extension AnimatedPositionedBinding on AnimatedPositioned {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class AnimatedPositionedDirectionalAutoBinding extends HTExternalClass {
-  AnimatedPositionedDirectionalAutoBinding() : super('AnimatedPositionedDirectional');
+  AnimatedPositionedDirectionalAutoBinding()
+      : super('AnimatedPositionedDirectional');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AnimatedPositionedDirectional':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnimatedPositionedDirectional(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            start: namedArgs.containsKey('start') ? namedArgs['start'] : null,
-            top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
-            end: namedArgs.containsKey('end') ? namedArgs['end'] : null,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : null,
-            width: namedArgs.containsKey('width') ? namedArgs['width'] : null,
-            height: namedArgs.containsKey('height') ? namedArgs['height'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
-            duration: namedArgs['duration'],
-            onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnimatedPositionedDirectional(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                start:
+                    namedArgs.containsKey('start') ? namedArgs['start'] : null,
+                top: namedArgs.containsKey('top') ? namedArgs['top'] : null,
+                end: namedArgs.containsKey('end') ? namedArgs['end'] : null,
+                bottom: namedArgs.containsKey('bottom')
+                    ? namedArgs['bottom']
+                    : null,
+                width:
+                    namedArgs.containsKey('width') ? namedArgs['width'] : null,
+                height: namedArgs.containsKey('height')
+                    ? namedArgs['height']
+                    : null,
+                curve: namedArgs.containsKey('curve')
+                    ? namedArgs['curve']
+                    : Curves.linear,
+                duration: namedArgs['duration'],
+                onEnd:
+                    namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -939,16 +1078,18 @@ class AnimatedPositionedDirectionalAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension AnimatedPositionedDirectionalBinding on AnimatedPositionedDirectional {
+extension AnimatedPositionedDirectionalBinding
+    on AnimatedPositionedDirectional {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedPositionedDirectional');
+        return const HTType('AnimatedPositionedDirectional');
       case 'child':
         return child;
       case 'start':
@@ -976,29 +1117,41 @@ extension AnimatedPositionedDirectionalBinding on AnimatedPositionedDirectional
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1014,13 +1167,17 @@ class AnimatedOpacityAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
             opacity: namedArgs['opacity'],
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null,
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false);
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1031,7 +1188,8 @@ class AnimatedOpacityAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -1040,7 +1198,7 @@ extension AnimatedOpacityBinding on AnimatedOpacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedOpacity');
+        return const HTType('AnimatedOpacity');
       case 'child':
         return child;
       case 'opacity':
@@ -1060,29 +1218,41 @@ extension AnimatedOpacityBinding on AnimatedOpacity {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1096,15 +1266,20 @@ class SliverAnimatedOpacityAutoBinding extends HTExternalClass {
       case 'SliverAnimatedOpacity':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverAnimatedOpacity(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null,
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null,
             opacity: namedArgs['opacity'],
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null,
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false);
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1115,7 +1290,8 @@ class SliverAnimatedOpacityAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -1124,7 +1300,7 @@ extension SliverAnimatedOpacityBinding on SliverAnimatedOpacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverAnimatedOpacity');
+        return const HTType('SliverAnimatedOpacity');
       case 'sliver':
         return sliver;
       case 'opacity':
@@ -1144,29 +1320,41 @@ extension SliverAnimatedOpacityBinding on SliverAnimatedOpacity {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1178,22 +1366,51 @@ class AnimatedDefaultTextStyleAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AnimatedDefaultTextStyle':
-        return ({positionalArgs, namedArgs, typeArgs}) => AnimatedDefaultTextStyle(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            style: namedArgs['style'],
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : true,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : TextOverflow.clip,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            textWidthBasis:
-                namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : TextWidthBasis.parent,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
-            duration: namedArgs['duration'],
-            onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            AnimatedDefaultTextStyle(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                style: namedArgs['style'],
+                textAlign:
+                    namedArgs.containsKey(
+                            'textAlign')
+                        ? namedArgs['textAlign']
+                        : null,
+                softWrap:
+                    namedArgs.containsKey(
+                            'softWrap')
+                        ? namedArgs['softWrap']
+                        : true,
+                overflow:
+                    namedArgs.containsKey(
+                            'overflow')
+                        ? namedArgs['overflow']
+                        : TextOverflow.clip,
+                maxLines:
+                    namedArgs.containsKey(
+                            'maxLines')
+                        ? namedArgs['maxLines']
+                        : null,
+                textWidthBasis:
+                    namedArgs.containsKey(
+                            'textWidthBasis')
+                        ? namedArgs['textWidthBasis']
+                        : TextWidthBasis.parent,
+                textHeightBehavior:
+                    namedArgs.containsKey(
+                            'textHeightBehavior')
+                        ? namedArgs['textHeightBehavior']
+                        : null,
+                curve:
+                    namedArgs
+                            .containsKey('curve')
+                        ? namedArgs['curve']
+                        : Curves.linear,
+                duration: namedArgs['duration'],
+                onEnd:
+                    namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1204,7 +1421,8 @@ class AnimatedDefaultTextStyleAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -1213,7 +1431,7 @@ extension AnimatedDefaultTextStyleBinding on AnimatedDefaultTextStyle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedDefaultTextStyle');
+        return const HTType('AnimatedDefaultTextStyle');
       case 'child':
         return child;
       case 'style':
@@ -1243,29 +1461,41 @@ extension AnimatedDefaultTextStyleBinding on AnimatedDefaultTextStyle {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -1281,18 +1511,28 @@ class AnimatedPhysicalModelAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
             shape: namedArgs['shape'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            borderRadius: namedArgs.containsKey('borderRadius') ? namedArgs['borderRadius'] : BorderRadius.zero,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            borderRadius: namedArgs.containsKey('borderRadius')
+                ? namedArgs['borderRadius']
+                : BorderRadius.zero,
             elevation: namedArgs['elevation'],
             color: namedArgs['color'],
-            animateColor: namedArgs.containsKey('animateColor') ? namedArgs['animateColor'] : true,
+            animateColor: namedArgs.containsKey('animateColor')
+                ? namedArgs['animateColor']
+                : true,
             shadowColor: namedArgs['shadowColor'],
-            animateShadowColor: namedArgs.containsKey('animateShadowColor') ? namedArgs['animateShadowColor'] : true,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.linear,
+            animateShadowColor: namedArgs.containsKey('animateShadowColor')
+                ? namedArgs['animateShadowColor']
+                : true,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.linear,
             duration: namedArgs['duration'],
             onEnd: namedArgs.containsKey('onEnd') ? namedArgs['onEnd'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1303,7 +1543,8 @@ class AnimatedPhysicalModelAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -1312,7 +1553,7 @@ extension AnimatedPhysicalModelBinding on AnimatedPhysicalModel {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedPhysicalModel');
+        return const HTType('AnimatedPhysicalModel');
       case 'child':
         return child;
       case 'shape':
@@ -1344,29 +1585,41 @@ extension AnimatedPhysicalModelBinding on AnimatedPhysicalModel {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/interactive_viewer.g.dart b/lib/bindings/flutter/widgets/interactive_viewer.g.dart
index 1171c61..d870c9a 100644
--- a/lib/bindings/flutter/widgets/interactive_viewer.g.dart
+++ b/lib/bindings/flutter/widgets/interactive_viewer.g.dart
@@ -10,22 +10,44 @@ class InteractiveViewerAutoBinding extends HTExternalClass {
       case 'InteractiveViewer':
         return ({positionalArgs, namedArgs, typeArgs}) => InteractiveViewer(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            alignPanAxis: namedArgs.containsKey('alignPanAxis') ? namedArgs['alignPanAxis'] : false,
-            boundaryMargin: namedArgs.containsKey('boundaryMargin') ? namedArgs['boundaryMargin'] : EdgeInsets.zero,
-            constrained: namedArgs.containsKey('constrained') ? namedArgs['constrained'] : true,
-            maxScale: namedArgs.containsKey('maxScale') ? namedArgs['maxScale'] : 2.5,
-            minScale: namedArgs.containsKey('minScale') ? namedArgs['minScale'] : 0.8,
-            onInteractionEnd: namedArgs.containsKey('onInteractionEnd') ? namedArgs['onInteractionEnd'] : null,
-            onInteractionStart: namedArgs.containsKey('onInteractionStart') ? namedArgs['onInteractionStart'] : null,
-            onInteractionUpdate: namedArgs.containsKey('onInteractionUpdate') ? namedArgs['onInteractionUpdate'] : null,
-            panEnabled: namedArgs.containsKey('panEnabled') ? namedArgs['panEnabled'] : true,
-            scaleEnabled: namedArgs.containsKey('scaleEnabled') ? namedArgs['scaleEnabled'] : true,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            alignPanAxis: namedArgs.containsKey('alignPanAxis')
+                ? namedArgs['alignPanAxis']
+                : false,
+            boundaryMargin: namedArgs.containsKey('boundaryMargin')
+                ? namedArgs['boundaryMargin']
+                : EdgeInsets.zero,
+            constrained: namedArgs.containsKey('constrained')
+                ? namedArgs['constrained']
+                : true,
+            maxScale:
+                namedArgs.containsKey('maxScale') ? namedArgs['maxScale'] : 2.5,
+            minScale:
+                namedArgs.containsKey('minScale') ? namedArgs['minScale'] : 0.8,
+            onInteractionEnd: namedArgs.containsKey('onInteractionEnd')
+                ? namedArgs['onInteractionEnd']
+                : null,
+            onInteractionStart: namedArgs.containsKey('onInteractionStart')
+                ? namedArgs['onInteractionStart']
+                : null,
+            onInteractionUpdate: namedArgs.containsKey('onInteractionUpdate')
+                ? namedArgs['onInteractionUpdate']
+                : null,
+            panEnabled: namedArgs.containsKey('panEnabled')
+                ? namedArgs['panEnabled']
+                : true,
+            scaleEnabled: namedArgs.containsKey('scaleEnabled')
+                ? namedArgs['scaleEnabled']
+                : true,
             transformationController:
-                namedArgs.containsKey('transformationController') ? namedArgs['transformationController'] : null,
+                namedArgs.containsKey('transformationController')
+                    ? namedArgs['transformationController']
+                    : null,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -36,12 +58,12 @@ class InteractiveViewerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureScaleEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureScaleStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureScaleUpdateCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureScaleEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureScaleStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureScaleUpdateCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
     };
   }
 }
@@ -50,7 +72,7 @@ extension InteractiveViewerBinding on InteractiveViewer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InteractiveViewer');
+        return const HTType('InteractiveViewer');
       case 'clipBehavior':
         return clipBehavior;
       case 'alignPanAxis':
@@ -88,25 +110,37 @@ extension InteractiveViewerBinding on InteractiveViewer {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -119,9 +153,10 @@ class TransformationControllerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'TransformationController':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TransformationController(positionalArgs.length > 0 ? positionalArgs[0] : null);
+            TransformationController(
+                positionalArgs.length > 0 ? positionalArgs[0] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -132,7 +167,8 @@ class TransformationControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -141,21 +177,24 @@ extension TransformationControllerBinding on TransformationController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TransformationController');
+        return const HTType('TransformationController');
       case 'value':
         return value;
       case 'toScene':
-        return ({positionalArgs, namedArgs, typeArgs}) => toScene(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toScene(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/layout_builder.g.dart b/lib/bindings/flutter/widgets/layout_builder.g.dart
index 277db5b..5f099af 100644
--- a/lib/bindings/flutter/widgets/layout_builder.g.dart
+++ b/lib/bindings/flutter/widgets/layout_builder.g.dart
@@ -10,10 +10,11 @@ class LayoutBuilderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LayoutBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            LayoutBuilder(key: namedArgs.containsKey('key') ? namedArgs['key'] : null, builder: namedArgs['builder']);
+        return ({positionalArgs, namedArgs, typeArgs}) => LayoutBuilder(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            builder: namedArgs['builder']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +26,9 @@ class LayoutBuilderAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'LayoutWidgetBuilder': (HTFunction function) => (context, constraints) =>
-          function.call(positionalArgs: [context, constraints], namedArgs: const {}) as Widget,
+          function.call(
+              positionalArgs: [context, constraints],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -34,7 +37,7 @@ extension LayoutBuilderBinding on LayoutBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LayoutBuilder');
+        return const HTType('LayoutBuilder');
       case 'key':
         return key;
       case 'builder':
@@ -42,31 +45,44 @@ extension LayoutBuilderBinding on LayoutBuilder {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/list_wheel_scroll_view.g.dart b/lib/bindings/flutter/widgets/list_wheel_scroll_view.g.dart
index e55fac6..4f759d0 100644
--- a/lib/bindings/flutter/widgets/list_wheel_scroll_view.g.dart
+++ b/lib/bindings/flutter/widgets/list_wheel_scroll_view.g.dart
@@ -11,9 +11,10 @@ class ListWheelChildListDelegateAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ListWheelChildListDelegate':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ListWheelChildListDelegate(children: List<Widget>.from(namedArgs['children']));
+            ListWheelChildListDelegate(
+                children: List<Widget>.from(namedArgs['children']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,34 +28,39 @@ extension ListWheelChildListDelegateBinding on ListWheelChildListDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListWheelChildListDelegate');
+        return const HTType('ListWheelChildListDelegate');
       case 'children':
         return children;
       case 'estimatedChildCount':
         return estimatedChildCount;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0], positionalArgs[1]);
       case 'shouldRebuild':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRebuild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRebuild(positionalArgs[0]);
       case 'trueIndexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => trueIndexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            trueIndexOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class ListWheelChildLoopingListDelegateAutoBinding extends HTExternalClass {
-  ListWheelChildLoopingListDelegateAutoBinding() : super('ListWheelChildLoopingListDelegate');
+  ListWheelChildLoopingListDelegateAutoBinding()
+      : super('ListWheelChildLoopingListDelegate');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ListWheelChildLoopingListDelegate':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ListWheelChildLoopingListDelegate(children: List<Widget>.from(namedArgs['children']));
+            ListWheelChildLoopingListDelegate(
+                children: List<Widget>.from(namedArgs['children']));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -64,39 +70,47 @@ class ListWheelChildLoopingListDelegateAutoBinding extends HTExternalClass {
   }
 }
 
-extension ListWheelChildLoopingListDelegateBinding on ListWheelChildLoopingListDelegate {
+extension ListWheelChildLoopingListDelegateBinding
+    on ListWheelChildLoopingListDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListWheelChildLoopingListDelegate');
+        return const HTType('ListWheelChildLoopingListDelegate');
       case 'children':
         return children;
       case 'estimatedChildCount':
         return estimatedChildCount;
       case 'trueIndexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => trueIndexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            trueIndexOf(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0], positionalArgs[1]);
       case 'shouldRebuild':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRebuild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRebuild(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class ListWheelChildBuilderDelegateAutoBinding extends HTExternalClass {
-  ListWheelChildBuilderDelegateAutoBinding() : super('ListWheelChildBuilderDelegate');
+  ListWheelChildBuilderDelegateAutoBinding()
+      : super('ListWheelChildBuilderDelegate');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ListWheelChildBuilderDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => ListWheelChildBuilderDelegate(
-            builder: namedArgs['builder'],
-            childCount: namedArgs.containsKey('childCount') ? namedArgs['childCount'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ListWheelChildBuilderDelegate(
+                builder: namedArgs['builder'],
+                childCount: namedArgs.containsKey('childCount')
+                    ? namedArgs['childCount']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -107,17 +121,20 @@ class ListWheelChildBuilderDelegateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'NullableIndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget?,
+      'NullableIndexedWidgetBuilder': (HTFunction function) => (context,
+              index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget?,
     };
   }
 }
 
-extension ListWheelChildBuilderDelegateBinding on ListWheelChildBuilderDelegate {
+extension ListWheelChildBuilderDelegateBinding
+    on ListWheelChildBuilderDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListWheelChildBuilderDelegate');
+        return const HTType('ListWheelChildBuilderDelegate');
       case 'builder':
         return builder;
       case 'childCount':
@@ -125,28 +142,35 @@ extension ListWheelChildBuilderDelegateBinding on ListWheelChildBuilderDelegate
       case 'estimatedChildCount':
         return estimatedChildCount;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0], positionalArgs[1]);
       case 'shouldRebuild':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRebuild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRebuild(positionalArgs[0]);
       case 'trueIndexOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => trueIndexOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            trueIndexOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class FixedExtentScrollControllerAutoBinding extends HTExternalClass {
-  FixedExtentScrollControllerAutoBinding() : super('FixedExtentScrollController');
+  FixedExtentScrollControllerAutoBinding()
+      : super('FixedExtentScrollController');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'FixedExtentScrollController':
-        return ({positionalArgs, namedArgs, typeArgs}) => FixedExtentScrollController(
-            initialItem: namedArgs.containsKey('initialItem') ? namedArgs['initialItem'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FixedExtentScrollController(
+                initialItem: namedArgs.containsKey('initialItem')
+                    ? namedArgs['initialItem']
+                    : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -157,7 +181,8 @@ class FixedExtentScrollControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -166,7 +191,7 @@ extension FixedExtentScrollControllerBinding on FixedExtentScrollController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FixedExtentScrollController');
+        return const HTType('FixedExtentScrollController');
       case 'initialItem':
         return initialItem;
       case 'keepScrollOffset':
@@ -184,36 +209,49 @@ extension FixedExtentScrollControllerBinding on FixedExtentScrollController {
       case 'offset':
         return offset;
       case 'animateToItem':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateToItem(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateToItem(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'jumpToItem':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpToItem(positionalArgs[0]);
-      case 'createScrollPosition':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            createScrollPosition(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            jumpToItem(positionalArgs[0]);
+      case 'createScrollPosition':
+        return ({positionalArgs, namedArgs, typeArgs}) => createScrollPosition(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'jumpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            jumpTo(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
-        return ({positionalArgs, namedArgs, typeArgs}) => detach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            detach(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -233,7 +271,7 @@ class FixedExtentMetricsAutoBinding extends HTExternalClass {
             axisDirection: namedArgs['axisDirection'],
             itemIndex: namedArgs['itemIndex']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -247,7 +285,7 @@ extension FixedExtentMetricsBinding on FixedExtentMetrics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FixedExtentMetrics');
+        return const HTType('FixedExtentMetrics');
       case 'itemIndex':
         return itemIndex;
       case 'axisDirection':
@@ -280,16 +318,27 @@ extension FixedExtentMetricsBinding on FixedExtentMetrics {
         return extentAfter;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            minScrollExtent: namedArgs.containsKey('minScrollExtent') ? namedArgs['minScrollExtent'] : null,
-            maxScrollExtent: namedArgs.containsKey('maxScrollExtent') ? namedArgs['maxScrollExtent'] : null,
-            pixels: namedArgs.containsKey('pixels') ? namedArgs['pixels'] : null,
-            viewportDimension: namedArgs.containsKey('viewportDimension') ? namedArgs['viewportDimension'] : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : null,
-            itemIndex: namedArgs.containsKey('itemIndex') ? namedArgs['itemIndex'] : null);
+            minScrollExtent: namedArgs.containsKey('minScrollExtent')
+                ? namedArgs['minScrollExtent']
+                : null,
+            maxScrollExtent: namedArgs.containsKey('maxScrollExtent')
+                ? namedArgs['maxScrollExtent']
+                : null,
+            pixels:
+                namedArgs.containsKey('pixels') ? namedArgs['pixels'] : null,
+            viewportDimension: namedArgs.containsKey('viewportDimension')
+                ? namedArgs['viewportDimension']
+                : null,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : null,
+            itemIndex: namedArgs.containsKey('itemIndex')
+                ? namedArgs['itemIndex']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -302,9 +351,12 @@ class FixedExtentScrollPhysicsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'FixedExtentScrollPhysics':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            FixedExtentScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+            FixedExtentScrollPhysics(
+                parent: namedArgs.containsKey('parent')
+                    ? namedArgs['parent']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -318,7 +370,7 @@ extension FixedExtentScrollPhysicsBinding on FixedExtentScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FixedExtentScrollPhysics');
+        return const HTType('FixedExtentScrollPhysics');
       case 'parent':
         return parent;
       case 'spring':
@@ -336,7 +388,8 @@ extension FixedExtentScrollPhysicsBinding on FixedExtentScrollPhysics {
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
@@ -344,24 +397,37 @@ extension FixedExtentScrollPhysicsBinding on FixedExtentScrollPhysics {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -375,57 +441,98 @@ class ListWheelScrollViewAutoBinding extends HTExternalClass {
       case 'ListWheelScrollView':
         return ({positionalArgs, namedArgs, typeArgs}) => ListWheelScrollView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
             diameterRatio: namedArgs.containsKey('diameterRatio')
                 ? namedArgs['diameterRatio']
                 : RenderListWheelViewport.defaultDiameterRatio,
             perspective: namedArgs.containsKey('perspective')
                 ? namedArgs['perspective']
                 : RenderListWheelViewport.defaultPerspective,
-            offAxisFraction: namedArgs.containsKey('offAxisFraction') ? namedArgs['offAxisFraction'] : 0.0,
-            useMagnifier: namedArgs.containsKey('useMagnifier') ? namedArgs['useMagnifier'] : false,
-            magnification: namedArgs.containsKey('magnification') ? namedArgs['magnification'] : 1.0,
+            offAxisFraction: namedArgs.containsKey('offAxisFraction')
+                ? namedArgs['offAxisFraction']
+                : 0.0,
+            useMagnifier: namedArgs.containsKey('useMagnifier')
+                ? namedArgs['useMagnifier']
+                : false,
+            magnification: namedArgs.containsKey('magnification')
+                ? namedArgs['magnification']
+                : 1.0,
             overAndUnderCenterOpacity:
-                namedArgs.containsKey('overAndUnderCenterOpacity') ? namedArgs['overAndUnderCenterOpacity'] : 1.0,
+                namedArgs.containsKey('overAndUnderCenterOpacity')
+                    ? namedArgs['overAndUnderCenterOpacity']
+                    : 1.0,
             itemExtent: namedArgs['itemExtent'],
-            squeeze: namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : 1.0,
+            squeeze:
+                namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : 1.0,
             onSelectedItemChanged:
-                namedArgs.containsKey('onSelectedItemChanged') ? namedArgs['onSelectedItemChanged'] : null,
-            renderChildrenOutsideViewport: namedArgs.containsKey('renderChildrenOutsideViewport')
-                ? namedArgs['renderChildrenOutsideViewport']
-                : false,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
+                namedArgs.containsKey('onSelectedItemChanged')
+                    ? namedArgs['onSelectedItemChanged']
+                    : null,
+            renderChildrenOutsideViewport:
+                namedArgs.containsKey('renderChildrenOutsideViewport')
+                    ? namedArgs['renderChildrenOutsideViewport']
+                    : false,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
             children: List<Widget>.from(namedArgs['children']));
       case 'ListWheelScrollView.useDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => ListWheelScrollView.useDelegate(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            diameterRatio: namedArgs.containsKey('diameterRatio')
-                ? namedArgs['diameterRatio']
-                : RenderListWheelViewport.defaultDiameterRatio,
-            perspective: namedArgs.containsKey('perspective')
-                ? namedArgs['perspective']
-                : RenderListWheelViewport.defaultPerspective,
-            offAxisFraction: namedArgs.containsKey('offAxisFraction') ? namedArgs['offAxisFraction'] : 0.0,
-            useMagnifier: namedArgs.containsKey('useMagnifier') ? namedArgs['useMagnifier'] : false,
-            magnification: namedArgs.containsKey('magnification') ? namedArgs['magnification'] : 1.0,
-            overAndUnderCenterOpacity:
-                namedArgs.containsKey('overAndUnderCenterOpacity') ? namedArgs['overAndUnderCenterOpacity'] : 1.0,
-            itemExtent: namedArgs['itemExtent'],
-            squeeze: namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : 1.0,
-            onSelectedItemChanged:
-                namedArgs.containsKey('onSelectedItemChanged') ? namedArgs['onSelectedItemChanged'] : null,
-            renderChildrenOutsideViewport: namedArgs.containsKey('renderChildrenOutsideViewport')
-                ? namedArgs['renderChildrenOutsideViewport']
-                : false,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            childDelegate: namedArgs['childDelegate']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ListWheelScrollView.useDelegate(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                controller: namedArgs.containsKey('controller')
+                    ? namedArgs['controller']
+                    : null,
+                physics: namedArgs.containsKey('physics')
+                    ? namedArgs['physics']
+                    : null,
+                diameterRatio: namedArgs.containsKey('diameterRatio')
+                    ? namedArgs['diameterRatio']
+                    : RenderListWheelViewport.defaultDiameterRatio,
+                perspective: namedArgs.containsKey('perspective')
+                    ? namedArgs['perspective']
+                    : RenderListWheelViewport.defaultPerspective,
+                offAxisFraction: namedArgs.containsKey('offAxisFraction')
+                    ? namedArgs['offAxisFraction']
+                    : 0.0,
+                useMagnifier: namedArgs.containsKey('useMagnifier')
+                    ? namedArgs['useMagnifier']
+                    : false,
+                magnification: namedArgs.containsKey('magnification')
+                    ? namedArgs['magnification']
+                    : 1.0,
+                overAndUnderCenterOpacity:
+                    namedArgs.containsKey('overAndUnderCenterOpacity')
+                        ? namedArgs['overAndUnderCenterOpacity']
+                        : 1.0,
+                itemExtent: namedArgs['itemExtent'],
+                squeeze: namedArgs.containsKey('squeeze')
+                    ? namedArgs['squeeze']
+                    : 1.0,
+                onSelectedItemChanged:
+                    namedArgs.containsKey('onSelectedItemChanged')
+                        ? namedArgs['onSelectedItemChanged']
+                        : null,
+                renderChildrenOutsideViewport:
+                    namedArgs.containsKey('renderChildrenOutsideViewport')
+                        ? namedArgs['renderChildrenOutsideViewport']
+                        : false,
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.hardEdge,
+                restorationId: namedArgs.containsKey('restorationId')
+                    ? namedArgs['restorationId']
+                    : null,
+                childDelegate: namedArgs['childDelegate']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -439,7 +546,7 @@ extension ListWheelScrollViewBinding on ListWheelScrollView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListWheelScrollView');
+        return const HTType('ListWheelScrollView');
       case 'controller':
         return controller;
       case 'physics':
@@ -481,25 +588,37 @@ extension ListWheelScrollViewBinding on ListWheelScrollView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -511,9 +630,10 @@ class ListWheelElementAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ListWheelElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => ListWheelElement(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ListWheelElement(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -524,8 +644,8 @@ class ListWheelElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
@@ -534,7 +654,7 @@ extension ListWheelElementBinding on ListWheelElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListWheelElement');
+        return const HTType('ListWheelElement');
       case 'widget':
         return widget;
       case 'renderObject':
@@ -556,60 +676,84 @@ extension ListWheelElementBinding on ListWheelElement {
       case 'dirty':
         return dirty;
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'retrieveWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => retrieveWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            retrieveWidget(positionalArgs[0]);
       case 'childExistsAt':
-        return ({positionalArgs, namedArgs, typeArgs}) => childExistsAt(positionalArgs[0]);
-      case 'createChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            createChild(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            childExistsAt(positionalArgs[0]);
+      case 'createChild':
+        return ({positionalArgs, namedArgs, typeArgs}) => createChild(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'removeChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeChild(positionalArgs[0]);
-      case 'updateChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            updateChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            removeChild(positionalArgs[0]);
+      case 'updateChild':
+        return ({positionalArgs, namedArgs, typeArgs}) => updateChild(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'insertRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
-      case 'moveRenderObjectChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            moveRenderObjectChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+      case 'moveRenderObjectChild':
+        return ({positionalArgs, namedArgs, typeArgs}) => moveRenderObjectChild(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'removeRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'deactivate':
         return ({positionalArgs, namedArgs, typeArgs}) => deactivate();
       case 'unmount':
         return ({positionalArgs, namedArgs, typeArgs}) => unmount();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'debugDeactivated':
@@ -617,29 +761,44 @@ extension ListWheelElementBinding on ListWheelElement {
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -647,25 +806,37 @@ extension ListWheelElementBinding on ListWheelElement {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'markNeedsBuild':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsBuild();
       case 'rebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -685,21 +856,33 @@ class ListWheelViewportAutoBinding extends HTExternalClass {
             perspective: namedArgs.containsKey('perspective')
                 ? namedArgs['perspective']
                 : RenderListWheelViewport.defaultPerspective,
-            offAxisFraction: namedArgs.containsKey('offAxisFraction') ? namedArgs['offAxisFraction'] : 0.0,
-            useMagnifier: namedArgs.containsKey('useMagnifier') ? namedArgs['useMagnifier'] : false,
-            magnification: namedArgs.containsKey('magnification') ? namedArgs['magnification'] : 1.0,
+            offAxisFraction: namedArgs.containsKey('offAxisFraction')
+                ? namedArgs['offAxisFraction']
+                : 0.0,
+            useMagnifier: namedArgs.containsKey('useMagnifier')
+                ? namedArgs['useMagnifier']
+                : false,
+            magnification: namedArgs.containsKey('magnification')
+                ? namedArgs['magnification']
+                : 1.0,
             overAndUnderCenterOpacity:
-                namedArgs.containsKey('overAndUnderCenterOpacity') ? namedArgs['overAndUnderCenterOpacity'] : 1.0,
+                namedArgs.containsKey('overAndUnderCenterOpacity')
+                    ? namedArgs['overAndUnderCenterOpacity']
+                    : 1.0,
             itemExtent: namedArgs['itemExtent'],
-            squeeze: namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : 1.0,
-            renderChildrenOutsideViewport: namedArgs.containsKey('renderChildrenOutsideViewport')
-                ? namedArgs['renderChildrenOutsideViewport']
-                : false,
+            squeeze:
+                namedArgs.containsKey('squeeze') ? namedArgs['squeeze'] : 1.0,
+            renderChildrenOutsideViewport:
+                namedArgs.containsKey('renderChildrenOutsideViewport')
+                    ? namedArgs['renderChildrenOutsideViewport']
+                    : false,
             offset: namedArgs['offset'],
             childDelegate: namedArgs['childDelegate'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -713,7 +896,7 @@ extension ListWheelViewportBinding on ListWheelViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListWheelViewport');
+        return const HTType('ListWheelViewport');
       case 'diameterRatio':
         return diameterRatio;
       case 'perspective':
@@ -745,31 +928,45 @@ extension ListWheelViewportBinding on ListWheelViewport {
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/localizations.g.dart b/lib/bindings/flutter/widgets/localizations.g.dart
index 1e40ca6..cd5e685 100644
--- a/lib/bindings/flutter/widgets/localizations.g.dart
+++ b/lib/bindings/flutter/widgets/localizations.g.dart
@@ -10,27 +10,31 @@ class WidgetsLocalizationsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'WidgetsLocalizations.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => WidgetsLocalizations.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            WidgetsLocalizations.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class DefaultWidgetsLocalizationsAutoBinding extends HTExternalClass {
-  DefaultWidgetsLocalizationsAutoBinding() : super('DefaultWidgetsLocalizations');
+  DefaultWidgetsLocalizationsAutoBinding()
+      : super('DefaultWidgetsLocalizations');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DefaultWidgetsLocalizations':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultWidgetsLocalizations();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultWidgetsLocalizations();
       case 'DefaultWidgetsLocalizations.load':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultWidgetsLocalizations.load(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultWidgetsLocalizations.load(positionalArgs[0]);
       case 'DefaultWidgetsLocalizations.delegate':
         return DefaultWidgetsLocalizations.delegate;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,11 +48,11 @@ extension DefaultWidgetsLocalizationsBinding on DefaultWidgetsLocalizations {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultWidgetsLocalizations');
+        return const HTType('DefaultWidgetsLocalizations');
       case 'textDirection':
         return textDirection;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -63,25 +67,34 @@ class LocalizationsAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Localizations(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             locale: namedArgs['locale'],
-            delegates: List<LocalizationsDelegate<dynamic>>.from(namedArgs['delegates']),
+            delegates: List<LocalizationsDelegate<dynamic>>.from(
+                namedArgs['delegates']),
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'Localizations.override':
-        return ({positionalArgs, namedArgs, typeArgs}) => Localizations.override(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            context: namedArgs['context'],
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            delegates: namedArgs.containsKey('delegates')
-                ? List<LocalizationsDelegate<dynamic>>.from(namedArgs['delegates'])
-                : null,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Localizations.override(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                context: namedArgs['context'],
+                locale: namedArgs.containsKey('locale')
+                    ? namedArgs['locale']
+                    : null,
+                delegates: namedArgs.containsKey('delegates')
+                    ? List<LocalizationsDelegate<dynamic>>.from(
+                        namedArgs['delegates'])
+                    : null,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'Localizations.localeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => Localizations.localeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Localizations.localeOf(positionalArgs[0]);
       case 'Localizations.maybeLocaleOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => Localizations.maybeLocaleOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Localizations.maybeLocaleOf(positionalArgs[0]);
       case 'Localizations.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Localizations.of(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Localizations.of(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -95,7 +108,7 @@ extension LocalizationsBinding on Localizations {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Localizations');
+        return const HTType('Localizations');
       case 'locale':
         return locale;
       case 'delegates':
@@ -109,29 +122,41 @@ extension LocalizationsBinding on Localizations {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/media_query.g.dart b/lib/bindings/flutter/widgets/media_query.g.dart
index 14f2b77..07107d9 100644
--- a/lib/bindings/flutter/widgets/media_query.g.dart
+++ b/lib/bindings/flutter/widgets/media_query.g.dart
@@ -16,7 +16,7 @@ class OrientationAutoBinding extends HTExternalClass {
       case 'Orientation.landscape':
         return Orientation.landscape;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class OrientationAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Orientation');
+        return const HTType('Orientation');
       case 'index':
         return (instance as Orientation).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as Orientation).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as Orientation).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -48,7 +49,7 @@ class NavigationModeAutoBinding extends HTExternalClass {
       case 'NavigationMode.directional':
         return NavigationMode.directional;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -56,13 +57,14 @@ class NavigationModeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigationMode');
+        return const HTType('NavigationMode');
       case 'index':
         return (instance as NavigationMode).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as NavigationMode).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as NavigationMode).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -76,29 +78,54 @@ class MediaQueryDataAutoBinding extends HTExternalClass {
       case 'MediaQueryData':
         return ({positionalArgs, namedArgs, typeArgs}) => MediaQueryData(
             size: namedArgs.containsKey('size') ? namedArgs['size'] : Size.zero,
-            devicePixelRatio: namedArgs.containsKey('devicePixelRatio') ? namedArgs['devicePixelRatio'] : 1.0,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            platformBrightness:
-                namedArgs.containsKey('platformBrightness') ? namedArgs['platformBrightness'] : Brightness.light,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : EdgeInsets.zero,
-            viewInsets: namedArgs.containsKey('viewInsets') ? namedArgs['viewInsets'] : EdgeInsets.zero,
-            systemGestureInsets:
-                namedArgs.containsKey('systemGestureInsets') ? namedArgs['systemGestureInsets'] : EdgeInsets.zero,
-            viewPadding: namedArgs.containsKey('viewPadding') ? namedArgs['viewPadding'] : EdgeInsets.zero,
+            devicePixelRatio: namedArgs.containsKey('devicePixelRatio')
+                ? namedArgs['devicePixelRatio']
+                : 1.0,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            platformBrightness: namedArgs.containsKey('platformBrightness')
+                ? namedArgs['platformBrightness']
+                : Brightness.light,
+            padding: namedArgs.containsKey('padding')
+                ? namedArgs['padding']
+                : EdgeInsets.zero,
+            viewInsets: namedArgs.containsKey('viewInsets')
+                ? namedArgs['viewInsets']
+                : EdgeInsets.zero,
+            systemGestureInsets: namedArgs.containsKey('systemGestureInsets')
+                ? namedArgs['systemGestureInsets']
+                : EdgeInsets.zero,
+            viewPadding: namedArgs.containsKey('viewPadding')
+                ? namedArgs['viewPadding']
+                : EdgeInsets.zero,
             alwaysUse24HourFormat:
-                namedArgs.containsKey('alwaysUse24HourFormat') ? namedArgs['alwaysUse24HourFormat'] : false,
-            accessibleNavigation:
-                namedArgs.containsKey('accessibleNavigation') ? namedArgs['accessibleNavigation'] : false,
-            invertColors: namedArgs.containsKey('invertColors') ? namedArgs['invertColors'] : false,
-            highContrast: namedArgs.containsKey('highContrast') ? namedArgs['highContrast'] : false,
-            disableAnimations: namedArgs.containsKey('disableAnimations') ? namedArgs['disableAnimations'] : false,
-            boldText: namedArgs.containsKey('boldText') ? namedArgs['boldText'] : false,
-            navigationMode:
-                namedArgs.containsKey('navigationMode') ? namedArgs['navigationMode'] : NavigationMode.traditional);
+                namedArgs.containsKey('alwaysUse24HourFormat')
+                    ? namedArgs['alwaysUse24HourFormat']
+                    : false,
+            accessibleNavigation: namedArgs.containsKey('accessibleNavigation')
+                ? namedArgs['accessibleNavigation']
+                : false,
+            invertColors: namedArgs.containsKey('invertColors')
+                ? namedArgs['invertColors']
+                : false,
+            highContrast: namedArgs.containsKey('highContrast')
+                ? namedArgs['highContrast']
+                : false,
+            disableAnimations: namedArgs.containsKey('disableAnimations')
+                ? namedArgs['disableAnimations']
+                : false,
+            boldText: namedArgs.containsKey('boldText')
+                ? namedArgs['boldText']
+                : false,
+            navigationMode: namedArgs.containsKey('navigationMode')
+                ? namedArgs['navigationMode']
+                : NavigationMode.traditional);
       case 'MediaQueryData.fromWindow':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQueryData.fromWindow(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQueryData.fromWindow(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -112,7 +139,7 @@ extension MediaQueryDataBinding on MediaQueryData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MediaQueryData');
+        return const HTType('MediaQueryData');
       case 'size':
         return size;
       case 'devicePixelRatio':
@@ -150,44 +177,94 @@ extension MediaQueryDataBinding on MediaQueryData {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             size: namedArgs.containsKey('size') ? namedArgs['size'] : null,
-            devicePixelRatio: namedArgs.containsKey('devicePixelRatio') ? namedArgs['devicePixelRatio'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            platformBrightness: namedArgs.containsKey('platformBrightness') ? namedArgs['platformBrightness'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            viewPadding: namedArgs.containsKey('viewPadding') ? namedArgs['viewPadding'] : null,
-            viewInsets: namedArgs.containsKey('viewInsets') ? namedArgs['viewInsets'] : null,
-            systemGestureInsets: namedArgs.containsKey('systemGestureInsets') ? namedArgs['systemGestureInsets'] : null,
+            devicePixelRatio: namedArgs.containsKey('devicePixelRatio')
+                ? namedArgs['devicePixelRatio']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            platformBrightness: namedArgs.containsKey('platformBrightness')
+                ? namedArgs['platformBrightness']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            viewPadding: namedArgs.containsKey('viewPadding')
+                ? namedArgs['viewPadding']
+                : null,
+            viewInsets: namedArgs.containsKey('viewInsets')
+                ? namedArgs['viewInsets']
+                : null,
+            systemGestureInsets: namedArgs.containsKey('systemGestureInsets')
+                ? namedArgs['systemGestureInsets']
+                : null,
             alwaysUse24HourFormat:
-                namedArgs.containsKey('alwaysUse24HourFormat') ? namedArgs['alwaysUse24HourFormat'] : null,
-            highContrast: namedArgs.containsKey('highContrast') ? namedArgs['highContrast'] : null,
-            disableAnimations: namedArgs.containsKey('disableAnimations') ? namedArgs['disableAnimations'] : null,
-            invertColors: namedArgs.containsKey('invertColors') ? namedArgs['invertColors'] : null,
-            accessibleNavigation:
-                namedArgs.containsKey('accessibleNavigation') ? namedArgs['accessibleNavigation'] : null,
-            boldText: namedArgs.containsKey('boldText') ? namedArgs['boldText'] : null,
-            navigationMode: namedArgs.containsKey('navigationMode') ? namedArgs['navigationMode'] : null);
+                namedArgs.containsKey('alwaysUse24HourFormat')
+                    ? namedArgs['alwaysUse24HourFormat']
+                    : null,
+            highContrast: namedArgs.containsKey('highContrast')
+                ? namedArgs['highContrast']
+                : null,
+            disableAnimations: namedArgs.containsKey('disableAnimations')
+                ? namedArgs['disableAnimations']
+                : null,
+            invertColors: namedArgs.containsKey('invertColors')
+                ? namedArgs['invertColors']
+                : null,
+            accessibleNavigation: namedArgs.containsKey('accessibleNavigation')
+                ? namedArgs['accessibleNavigation']
+                : null,
+            boldText: namedArgs.containsKey('boldText')
+                ? namedArgs['boldText']
+                : null,
+            navigationMode: namedArgs.containsKey('navigationMode')
+                ? namedArgs['navigationMode']
+                : null);
       case 'removePadding':
         return ({positionalArgs, namedArgs, typeArgs}) => removePadding(
-            removeLeft: namedArgs.containsKey('removeLeft') ? namedArgs['removeLeft'] : false,
-            removeTop: namedArgs.containsKey('removeTop') ? namedArgs['removeTop'] : false,
-            removeRight: namedArgs.containsKey('removeRight') ? namedArgs['removeRight'] : false,
-            removeBottom: namedArgs.containsKey('removeBottom') ? namedArgs['removeBottom'] : false);
+            removeLeft: namedArgs.containsKey('removeLeft')
+                ? namedArgs['removeLeft']
+                : false,
+            removeTop: namedArgs.containsKey('removeTop')
+                ? namedArgs['removeTop']
+                : false,
+            removeRight: namedArgs.containsKey('removeRight')
+                ? namedArgs['removeRight']
+                : false,
+            removeBottom: namedArgs.containsKey('removeBottom')
+                ? namedArgs['removeBottom']
+                : false);
       case 'removeViewInsets':
         return ({positionalArgs, namedArgs, typeArgs}) => removeViewInsets(
-            removeLeft: namedArgs.containsKey('removeLeft') ? namedArgs['removeLeft'] : false,
-            removeTop: namedArgs.containsKey('removeTop') ? namedArgs['removeTop'] : false,
-            removeRight: namedArgs.containsKey('removeRight') ? namedArgs['removeRight'] : false,
-            removeBottom: namedArgs.containsKey('removeBottom') ? namedArgs['removeBottom'] : false);
+            removeLeft: namedArgs.containsKey('removeLeft')
+                ? namedArgs['removeLeft']
+                : false,
+            removeTop: namedArgs.containsKey('removeTop')
+                ? namedArgs['removeTop']
+                : false,
+            removeRight: namedArgs.containsKey('removeRight')
+                ? namedArgs['removeRight']
+                : false,
+            removeBottom: namedArgs.containsKey('removeBottom')
+                ? namedArgs['removeBottom']
+                : false);
       case 'removeViewPadding':
         return ({positionalArgs, namedArgs, typeArgs}) => removeViewPadding(
-            removeLeft: namedArgs.containsKey('removeLeft') ? namedArgs['removeLeft'] : false,
-            removeTop: namedArgs.containsKey('removeTop') ? namedArgs['removeTop'] : false,
-            removeRight: namedArgs.containsKey('removeRight') ? namedArgs['removeRight'] : false,
-            removeBottom: namedArgs.containsKey('removeBottom') ? namedArgs['removeBottom'] : false);
+            removeLeft: namedArgs.containsKey('removeLeft')
+                ? namedArgs['removeLeft']
+                : false,
+            removeTop: namedArgs.containsKey('removeTop')
+                ? namedArgs['removeTop']
+                : false,
+            removeRight: namedArgs.containsKey('removeRight')
+                ? namedArgs['removeRight']
+                : false,
+            removeBottom: namedArgs.containsKey('removeBottom')
+                ? namedArgs['removeBottom']
+                : false);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -204,46 +281,79 @@ class MediaQueryAutoBinding extends HTExternalClass {
             data: namedArgs['data'],
             child: namedArgs['child']);
       case 'MediaQuery.removePadding':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.removePadding(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            context: namedArgs['context'],
-            removeLeft: namedArgs.containsKey('removeLeft') ? namedArgs['removeLeft'] : false,
-            removeTop: namedArgs.containsKey('removeTop') ? namedArgs['removeTop'] : false,
-            removeRight: namedArgs.containsKey('removeRight') ? namedArgs['removeRight'] : false,
-            removeBottom: namedArgs.containsKey('removeBottom') ? namedArgs['removeBottom'] : false,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.removePadding(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                context: namedArgs['context'],
+                removeLeft: namedArgs.containsKey('removeLeft')
+                    ? namedArgs['removeLeft']
+                    : false,
+                removeTop: namedArgs.containsKey('removeTop')
+                    ? namedArgs['removeTop']
+                    : false,
+                removeRight: namedArgs.containsKey('removeRight')
+                    ? namedArgs['removeRight']
+                    : false,
+                removeBottom: namedArgs.containsKey('removeBottom')
+                    ? namedArgs['removeBottom']
+                    : false,
+                child: namedArgs['child']);
       case 'MediaQuery.removeViewInsets':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.removeViewInsets(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            context: namedArgs['context'],
-            removeLeft: namedArgs.containsKey('removeLeft') ? namedArgs['removeLeft'] : false,
-            removeTop: namedArgs.containsKey('removeTop') ? namedArgs['removeTop'] : false,
-            removeRight: namedArgs.containsKey('removeRight') ? namedArgs['removeRight'] : false,
-            removeBottom: namedArgs.containsKey('removeBottom') ? namedArgs['removeBottom'] : false,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.removeViewInsets(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                context: namedArgs['context'],
+                removeLeft: namedArgs.containsKey('removeLeft')
+                    ? namedArgs['removeLeft']
+                    : false,
+                removeTop: namedArgs.containsKey('removeTop')
+                    ? namedArgs['removeTop']
+                    : false,
+                removeRight: namedArgs.containsKey('removeRight')
+                    ? namedArgs['removeRight']
+                    : false,
+                removeBottom: namedArgs.containsKey('removeBottom')
+                    ? namedArgs['removeBottom']
+                    : false,
+                child: namedArgs['child']);
       case 'MediaQuery.removeViewPadding':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.removeViewPadding(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            context: namedArgs['context'],
-            removeLeft: namedArgs.containsKey('removeLeft') ? namedArgs['removeLeft'] : false,
-            removeTop: namedArgs.containsKey('removeTop') ? namedArgs['removeTop'] : false,
-            removeRight: namedArgs.containsKey('removeRight') ? namedArgs['removeRight'] : false,
-            removeBottom: namedArgs.containsKey('removeBottom') ? namedArgs['removeBottom'] : false,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.removeViewPadding(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                context: namedArgs['context'],
+                removeLeft: namedArgs.containsKey('removeLeft')
+                    ? namedArgs['removeLeft']
+                    : false,
+                removeTop: namedArgs.containsKey('removeTop')
+                    ? namedArgs['removeTop']
+                    : false,
+                removeRight: namedArgs.containsKey('removeRight')
+                    ? namedArgs['removeRight']
+                    : false,
+                removeBottom: namedArgs.containsKey('removeBottom')
+                    ? namedArgs['removeBottom']
+                    : false,
+                child: namedArgs['child']);
       case 'MediaQuery.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.of(positionalArgs[0]);
       case 'MediaQuery.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.maybeOf(positionalArgs[0]);
       case 'MediaQuery.textScaleFactorOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.textScaleFactorOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.textScaleFactorOf(positionalArgs[0]);
       case 'MediaQuery.platformBrightnessOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.platformBrightnessOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.platformBrightnessOf(positionalArgs[0]);
       case 'MediaQuery.highContrastOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.highContrastOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.highContrastOf(positionalArgs[0]);
       case 'MediaQuery.boldTextOverride':
-        return ({positionalArgs, namedArgs, typeArgs}) => MediaQuery.boldTextOverride(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            MediaQuery.boldTextOverride(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -257,7 +367,7 @@ extension MediaQueryBinding on MediaQuery {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('MediaQuery');
+        return const HTType('MediaQuery');
       case 'data':
         return data;
       case 'child':
@@ -267,31 +377,44 @@ extension MediaQueryBinding on MediaQuery {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/modal_barrier.g.dart b/lib/bindings/flutter/widgets/modal_barrier.g.dart
index c8d4d57..1b7316f 100644
--- a/lib/bindings/flutter/widgets/modal_barrier.g.dart
+++ b/lib/bindings/flutter/widgets/modal_barrier.g.dart
@@ -13,12 +13,18 @@ class ModalBarrierAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ModalBarrier(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             color: namedArgs.containsKey('color') ? namedArgs['color'] : null,
-            dismissible: namedArgs.containsKey('dismissible') ? namedArgs['dismissible'] : true,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
+            dismissible: namedArgs.containsKey('dismissible')
+                ? namedArgs['dismissible']
+                : true,
+            semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                ? namedArgs['semanticsLabel']
+                : null,
             barrierSemanticsDismissible:
-                namedArgs.containsKey('barrierSemanticsDismissible') ? namedArgs['barrierSemanticsDismissible'] : true);
+                namedArgs.containsKey('barrierSemanticsDismissible')
+                    ? namedArgs['barrierSemanticsDismissible']
+                    : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +38,7 @@ extension ModalBarrierBinding on ModalBarrier {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ModalBarrier');
+        return const HTType('ModalBarrier');
       case 'color':
         return color;
       case 'dismissible':
@@ -46,31 +52,44 @@ extension ModalBarrierBinding on ModalBarrier {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -85,12 +104,18 @@ class AnimatedModalBarrierAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => AnimatedModalBarrier(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             color: namedArgs['color'],
-            dismissible: namedArgs.containsKey('dismissible') ? namedArgs['dismissible'] : true,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
+            dismissible: namedArgs.containsKey('dismissible')
+                ? namedArgs['dismissible']
+                : true,
+            semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                ? namedArgs['semanticsLabel']
+                : null,
             barrierSemanticsDismissible:
-                namedArgs.containsKey('barrierSemanticsDismissible') ? namedArgs['barrierSemanticsDismissible'] : null);
+                namedArgs.containsKey('barrierSemanticsDismissible')
+                    ? namedArgs['barrierSemanticsDismissible']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -104,7 +129,7 @@ extension AnimatedModalBarrierBinding on AnimatedModalBarrier {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedModalBarrier');
+        return const HTType('AnimatedModalBarrier');
       case 'dismissible':
         return dismissible;
       case 'semanticsLabel':
@@ -120,33 +145,46 @@ extension AnimatedModalBarrierBinding on AnimatedModalBarrier {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/navigation_toolbar.g.dart b/lib/bindings/flutter/widgets/navigation_toolbar.g.dart
index 845201a..c30e104 100644
--- a/lib/bindings/flutter/widgets/navigation_toolbar.g.dart
+++ b/lib/bindings/flutter/widgets/navigation_toolbar.g.dart
@@ -10,15 +10,23 @@ class NavigationToolbarAutoBinding extends HTExternalClass {
       case 'NavigationToolbar':
         return ({positionalArgs, namedArgs, typeArgs}) => NavigationToolbar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            leading: namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
-            middle: namedArgs.containsKey('middle') ? namedArgs['middle'] : null,
-            trailing: namedArgs.containsKey('trailing') ? namedArgs['trailing'] : null,
-            centerMiddle: namedArgs.containsKey('centerMiddle') ? namedArgs['centerMiddle'] : true,
-            middleSpacing: namedArgs.containsKey('middleSpacing') ? namedArgs['middleSpacing'] : kMiddleSpacing);
+            leading:
+                namedArgs.containsKey('leading') ? namedArgs['leading'] : null,
+            middle:
+                namedArgs.containsKey('middle') ? namedArgs['middle'] : null,
+            trailing: namedArgs.containsKey('trailing')
+                ? namedArgs['trailing']
+                : null,
+            centerMiddle: namedArgs.containsKey('centerMiddle')
+                ? namedArgs['centerMiddle']
+                : true,
+            middleSpacing: namedArgs.containsKey('middleSpacing')
+                ? namedArgs['middleSpacing']
+                : kMiddleSpacing);
       case 'NavigationToolbar.kMiddleSpacing':
         return NavigationToolbar.kMiddleSpacing;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +42,7 @@ extension NavigationToolbarBinding on NavigationToolbar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigationToolbar');
+        return const HTType('NavigationToolbar');
       case 'leading':
         return leading;
       case 'middle':
@@ -50,31 +58,44 @@ extension NavigationToolbarBinding on NavigationToolbar {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/navigator.g.dart b/lib/bindings/flutter/widgets/navigator.g.dart
index b67b3d1..432b3ef 100644
--- a/lib/bindings/flutter/widgets/navigator.g.dart
+++ b/lib/bindings/flutter/widgets/navigator.g.dart
@@ -18,7 +18,7 @@ class RoutePopDispositionAutoBinding extends HTExternalClass {
       case 'RoutePopDisposition.bubble':
         return RoutePopDisposition.bubble;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class RoutePopDispositionAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RoutePopDisposition');
+        return const HTType('RoutePopDisposition');
       case 'index':
         return (instance as RoutePopDisposition).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as RoutePopDisposition).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as RoutePopDisposition).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,9 +47,11 @@ class RouteSettingsAutoBinding extends HTExternalClass {
       case 'RouteSettings':
         return ({positionalArgs, namedArgs, typeArgs}) => RouteSettings(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -62,7 +65,7 @@ extension RouteSettingsBinding on RouteSettings {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RouteSettings');
+        return const HTType('RouteSettings');
       case 'name':
         return name;
       case 'arguments':
@@ -70,11 +73,13 @@ extension RouteSettingsBinding on RouteSettings {
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -88,7 +93,7 @@ class NavigatorObserverAutoBinding extends HTExternalClass {
       case 'NavigatorObserver':
         return ({positionalArgs, namedArgs, typeArgs}) => NavigatorObserver();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -102,25 +107,33 @@ extension NavigatorObserverBinding on NavigatorObserver {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigatorObserver');
+        return const HTType('NavigatorObserver');
       case 'navigator':
         return navigator;
       case 'didPush':
-        return ({positionalArgs, namedArgs, typeArgs}) => didPush(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didPush(positionalArgs[0], positionalArgs[1]);
       case 'didPop':
-        return ({positionalArgs, namedArgs, typeArgs}) => didPop(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didPop(positionalArgs[0], positionalArgs[1]);
       case 'didRemove':
-        return ({positionalArgs, namedArgs, typeArgs}) => didRemove(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didRemove(positionalArgs[0], positionalArgs[1]);
       case 'didReplace':
         return ({positionalArgs, namedArgs, typeArgs}) => didReplace(
-            newRoute: namedArgs.containsKey('newRoute') ? namedArgs['newRoute'] : null,
-            oldRoute: namedArgs.containsKey('oldRoute') ? namedArgs['oldRoute'] : null);
+            newRoute: namedArgs.containsKey('newRoute')
+                ? namedArgs['newRoute']
+                : null,
+            oldRoute: namedArgs.containsKey('oldRoute')
+                ? namedArgs['oldRoute']
+                : null);
       case 'didStartUserGesture':
-        return ({positionalArgs, namedArgs, typeArgs}) => didStartUserGesture(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didStartUserGesture(positionalArgs[0], positionalArgs[1]);
       case 'didStopUserGesture':
         return ({positionalArgs, namedArgs, typeArgs}) => didStopUserGesture();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -137,12 +150,15 @@ class HeroControllerScopeAutoBinding extends HTExternalClass {
             controller: namedArgs['controller'],
             child: namedArgs['child']);
       case 'HeroControllerScope.none':
-        return ({positionalArgs, namedArgs, typeArgs}) => HeroControllerScope.none(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null, child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HeroControllerScope.none(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child']);
       case 'HeroControllerScope.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => HeroControllerScope.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            HeroControllerScope.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -156,7 +172,7 @@ extension HeroControllerScopeBinding on HeroControllerScope {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HeroControllerScope');
+        return const HTType('HeroControllerScope');
       case 'controller':
         return controller;
       case 'child':
@@ -166,31 +182,44 @@ extension HeroControllerScopeBinding on HeroControllerScope {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -204,46 +233,70 @@ class NavigatorAutoBinding extends HTExternalClass {
       case 'Navigator':
         return ({positionalArgs, namedArgs, typeArgs}) => Navigator(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            pages:
-                namedArgs.containsKey('pages') ? List<Page<dynamic>>.from(namedArgs['pages']) : const <Page<dynamic>>[],
-            onPopPage: namedArgs.containsKey('onPopPage') ? namedArgs['onPopPage'] : null,
-            initialRoute: namedArgs.containsKey('initialRoute') ? namedArgs['initialRoute'] : null,
-            onGenerateInitialRoutes: namedArgs.containsKey('onGenerateInitialRoutes')
-                ? namedArgs['onGenerateInitialRoutes']
-                : Navigator.defaultGenerateInitialRoutes,
-            onGenerateRoute: namedArgs.containsKey('onGenerateRoute') ? namedArgs['onGenerateRoute'] : null,
-            onUnknownRoute: namedArgs.containsKey('onUnknownRoute') ? namedArgs['onUnknownRoute'] : null,
+            pages: namedArgs.containsKey('pages')
+                ? List<Page<dynamic>>.from(namedArgs['pages'])
+                : const <Page<dynamic>>[],
+            onPopPage: namedArgs.containsKey('onPopPage')
+                ? namedArgs['onPopPage']
+                : null,
+            initialRoute: namedArgs.containsKey('initialRoute')
+                ? namedArgs['initialRoute']
+                : null,
+            onGenerateInitialRoutes:
+                namedArgs.containsKey('onGenerateInitialRoutes')
+                    ? namedArgs['onGenerateInitialRoutes']
+                    : Navigator.defaultGenerateInitialRoutes,
+            onGenerateRoute: namedArgs.containsKey('onGenerateRoute')
+                ? namedArgs['onGenerateRoute']
+                : null,
+            onUnknownRoute: namedArgs.containsKey('onUnknownRoute')
+                ? namedArgs['onUnknownRoute']
+                : null,
             transitionDelegate: namedArgs.containsKey('transitionDelegate')
                 ? namedArgs['transitionDelegate']
                 : const DefaultTransitionDelegate<dynamic>(),
             reportsRouteUpdateToEngine:
-                namedArgs.containsKey('reportsRouteUpdateToEngine') ? namedArgs['reportsRouteUpdateToEngine'] : false,
+                namedArgs.containsKey('reportsRouteUpdateToEngine')
+                    ? namedArgs['reportsRouteUpdateToEngine']
+                    : false,
             observers: namedArgs.containsKey('observers')
                 ? List<NavigatorObserver>.from(namedArgs['observers'])
                 : const <NavigatorObserver>[],
-            restorationScopeId: namedArgs.containsKey('restorationScopeId') ? namedArgs['restorationScopeId'] : null);
+            restorationScopeId: namedArgs.containsKey('restorationScopeId')
+                ? namedArgs['restorationScopeId']
+                : null);
       case 'Navigator.canPop':
-        return ({positionalArgs, namedArgs, typeArgs}) => Navigator.canPop(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Navigator.canPop(positionalArgs[0]);
       case 'Navigator.popUntil':
-        return ({positionalArgs, namedArgs, typeArgs}) => Navigator.popUntil(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Navigator.popUntil(positionalArgs[0], positionalArgs[1]);
       case 'Navigator.removeRoute':
-        return ({positionalArgs, namedArgs, typeArgs}) => Navigator.removeRoute(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Navigator.removeRoute(positionalArgs[0], positionalArgs[1]);
       case 'Navigator.removeRouteBelow':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Navigator.removeRouteBelow(positionalArgs[0], positionalArgs[1]);
       case 'Navigator.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Navigator.of(positionalArgs[0],
-            rootNavigator: namedArgs.containsKey('rootNavigator') ? namedArgs['rootNavigator'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Navigator.of(
+            positionalArgs[0],
+            rootNavigator: namedArgs.containsKey('rootNavigator')
+                ? namedArgs['rootNavigator']
+                : false);
       case 'Navigator.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => Navigator.maybeOf(positionalArgs[0],
-            rootNavigator: namedArgs.containsKey('rootNavigator') ? namedArgs['rootNavigator'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => Navigator.maybeOf(
+            positionalArgs[0],
+            rootNavigator: namedArgs.containsKey('rootNavigator')
+                ? namedArgs['rootNavigator']
+                : false);
       case 'Navigator.defaultGenerateInitialRoutes':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Navigator.defaultGenerateInitialRoutes(positionalArgs[0], positionalArgs[1]);
+            Navigator.defaultGenerateInitialRoutes(
+                positionalArgs[0], positionalArgs[1]);
       case 'Navigator.defaultRouteName':
         return Navigator.defaultRouteName;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -254,14 +307,17 @@ class NavigatorAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'PopPageCallback': (HTFunction function) =>
-          (route, result) => function.call(positionalArgs: [route, result], namedArgs: const {}) as bool,
+      'PopPageCallback': (HTFunction function) => (route, result) => function
+          .call(positionalArgs: [route, result], namedArgs: const {}) as bool,
       'RouteListFactory': (HTFunction function) => (navigator, initialRoute) =>
-          function.call(positionalArgs: [navigator, initialRoute], namedArgs: const {}) as List<Route<dynamic>>,
-      'RouteFactory': (HTFunction function) =>
-          (settings) => function.call(positionalArgs: [settings], namedArgs: const {}) as Route<dynamic>?,
-      'RoutePredicate': (HTFunction function) =>
-          (route) => function.call(positionalArgs: [route], namedArgs: const {}) as bool,
+          function.call(
+              positionalArgs: [navigator, initialRoute],
+              namedArgs: const {}) as List<Route<dynamic>>,
+      'RouteFactory': (HTFunction function) => (settings) =>
+          function.call(positionalArgs: [settings], namedArgs: const {})
+              as Route<dynamic>?,
+      'RoutePredicate': (HTFunction function) => (route) =>
+          function.call(positionalArgs: [route], namedArgs: const {}) as bool,
     };
   }
 }
@@ -270,7 +326,7 @@ extension NavigatorBinding on Navigator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Navigator');
+        return const HTType('Navigator');
       case 'pages':
         return pages;
       case 'onPopPage':
@@ -302,25 +358,37 @@ extension NavigatorBinding on Navigator {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -334,7 +402,7 @@ class NavigatorStateAutoBinding extends HTExternalClass {
       case 'NavigatorState':
         return ({positionalArgs, namedArgs, typeArgs}) => NavigatorState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -345,10 +413,10 @@ class NavigatorStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RoutePredicate': (HTFunction function) =>
-          (route) => function.call(positionalArgs: [route], namedArgs: const {}) as bool,
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'RoutePredicate': (HTFunction function) => (route) =>
+          function.call(positionalArgs: [route], namedArgs: const {}) as bool,
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -357,7 +425,7 @@ extension NavigatorStateBinding on NavigatorState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NavigatorState');
+        return const HTType('NavigatorState');
       case 'focusScopeNode':
         return focusScopeNode;
       case 'userGestureInProgressNotifier':
@@ -381,116 +449,197 @@ extension NavigatorStateBinding on NavigatorState {
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'restoreState':
-        return ({positionalArgs, namedArgs, typeArgs}) => restoreState(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restoreState(positionalArgs[0], positionalArgs[1]);
       case 'didToggleBucket':
-        return ({positionalArgs, namedArgs, typeArgs}) => didToggleBucket(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didToggleBucket(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'pushNamed':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            pushNamed(positionalArgs[0], arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushNamed(
+            positionalArgs[0],
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       case 'restorablePushNamed':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorablePushNamed(positionalArgs[0],
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => restorablePushNamed(
+            positionalArgs[0],
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       case 'pushReplacementNamed':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushReplacementNamed(positionalArgs[0],
-            result: namedArgs.containsKey('result') ? namedArgs['result'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushReplacementNamed(
+            positionalArgs[0],
+            result:
+                namedArgs.containsKey('result') ? namedArgs['result'] : null,
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       case 'restorablePushReplacementNamed':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorablePushReplacementNamed(positionalArgs[0],
-            result: namedArgs.containsKey('result') ? namedArgs['result'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restorablePushReplacementNamed(positionalArgs[0],
+                result: namedArgs.containsKey('result')
+                    ? namedArgs['result']
+                    : null,
+                arguments: namedArgs.containsKey('arguments')
+                    ? namedArgs['arguments']
+                    : null);
       case 'popAndPushNamed':
-        return ({positionalArgs, namedArgs, typeArgs}) => popAndPushNamed(positionalArgs[0],
-            result: namedArgs.containsKey('result') ? namedArgs['result'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => popAndPushNamed(
+            positionalArgs[0],
+            result:
+                namedArgs.containsKey('result') ? namedArgs['result'] : null,
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       case 'restorablePopAndPushNamed':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorablePopAndPushNamed(positionalArgs[0],
-            result: namedArgs.containsKey('result') ? namedArgs['result'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restorablePopAndPushNamed(positionalArgs[0],
+                result:
+                    namedArgs.containsKey('result')
+                        ? namedArgs['result']
+                        : null,
+                arguments: namedArgs.containsKey('arguments')
+                    ? namedArgs['arguments']
+                    : null);
       case 'pushNamedAndRemoveUntil':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushNamedAndRemoveUntil(positionalArgs[0], positionalArgs[1],
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            pushNamedAndRemoveUntil(positionalArgs[0], positionalArgs[1],
+                arguments: namedArgs.containsKey('arguments')
+                    ? namedArgs['arguments']
+                    : null);
       case 'restorablePushNamedAndRemoveUntil':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorablePushNamedAndRemoveUntil(
-            positionalArgs[0], positionalArgs[1],
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restorablePushNamedAndRemoveUntil(
+                positionalArgs[0], positionalArgs[1],
+                arguments: namedArgs.containsKey('arguments')
+                    ? namedArgs['arguments']
+                    : null);
       case 'push':
-        return ({positionalArgs, namedArgs, typeArgs}) => push(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            push(positionalArgs[0]);
       case 'restorablePush':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorablePush(positionalArgs[0],
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => restorablePush(
+            positionalArgs[0],
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       case 'pushReplacement':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            pushReplacement(positionalArgs[0], result: namedArgs.containsKey('result') ? namedArgs['result'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => pushReplacement(
+            positionalArgs[0],
+            result:
+                namedArgs.containsKey('result') ? namedArgs['result'] : null);
       case 'restorablePushReplacement':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorablePushReplacement(positionalArgs[0],
-            result: namedArgs.containsKey('result') ? namedArgs['result'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restorablePushReplacement(positionalArgs[0],
+                result:
+                    namedArgs.containsKey('result')
+                        ? namedArgs['result']
+                        : null,
+                arguments: namedArgs.containsKey('arguments')
+                    ? namedArgs['arguments']
+                    : null);
       case 'pushAndRemoveUntil':
-        return ({positionalArgs, namedArgs, typeArgs}) => pushAndRemoveUntil(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            pushAndRemoveUntil(positionalArgs[0], positionalArgs[1]);
       case 'restorablePushAndRemoveUntil':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorablePushAndRemoveUntil(
-            positionalArgs[0], positionalArgs[1],
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restorablePushAndRemoveUntil(positionalArgs[0], positionalArgs[1],
+                arguments: namedArgs.containsKey('arguments')
+                    ? namedArgs['arguments']
+                    : null);
       case 'replace':
         return ({positionalArgs, namedArgs, typeArgs}) => replace(
-            oldRoute: namedArgs.containsKey('oldRoute') ? namedArgs['oldRoute'] : null,
-            newRoute: namedArgs.containsKey('newRoute') ? namedArgs['newRoute'] : null);
+            oldRoute: namedArgs.containsKey('oldRoute')
+                ? namedArgs['oldRoute']
+                : null,
+            newRoute: namedArgs.containsKey('newRoute')
+                ? namedArgs['newRoute']
+                : null);
       case 'restorableReplace':
         return ({positionalArgs, namedArgs, typeArgs}) => restorableReplace(
-            oldRoute: namedArgs.containsKey('oldRoute') ? namedArgs['oldRoute'] : null,
-            newRouteBuilder: namedArgs.containsKey('newRouteBuilder') ? namedArgs['newRouteBuilder'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+            oldRoute: namedArgs.containsKey('oldRoute')
+                ? namedArgs['oldRoute']
+                : null,
+            newRouteBuilder: namedArgs.containsKey('newRouteBuilder')
+                ? namedArgs['newRouteBuilder']
+                : null,
+            arguments: namedArgs.containsKey('arguments')
+                ? namedArgs['arguments']
+                : null);
       case 'replaceRouteBelow':
         return ({positionalArgs, namedArgs, typeArgs}) => replaceRouteBelow(
-            anchorRoute: namedArgs.containsKey('anchorRoute') ? namedArgs['anchorRoute'] : null,
-            newRoute: namedArgs.containsKey('newRoute') ? namedArgs['newRoute'] : null);
+            anchorRoute: namedArgs.containsKey('anchorRoute')
+                ? namedArgs['anchorRoute']
+                : null,
+            newRoute: namedArgs.containsKey('newRoute')
+                ? namedArgs['newRoute']
+                : null);
       case 'restorableReplaceRouteBelow':
-        return ({positionalArgs, namedArgs, typeArgs}) => restorableReplaceRouteBelow(
-            anchorRoute: namedArgs.containsKey('anchorRoute') ? namedArgs['anchorRoute'] : null,
-            newRouteBuilder: namedArgs.containsKey('newRouteBuilder') ? namedArgs['newRouteBuilder'] : null,
-            arguments: namedArgs.containsKey('arguments') ? namedArgs['arguments'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restorableReplaceRouteBelow(
+                anchorRoute: namedArgs.containsKey('anchorRoute')
+                    ? namedArgs['anchorRoute']
+                    : null,
+                newRouteBuilder: namedArgs.containsKey('newRouteBuilder')
+                    ? namedArgs['newRouteBuilder']
+                    : null,
+                arguments: namedArgs.containsKey('arguments')
+                    ? namedArgs['arguments']
+                    : null);
       case 'canPop':
         return ({positionalArgs, namedArgs, typeArgs}) => canPop();
       case 'maybePop':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             maybePop(positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'pop':
-        return ({positionalArgs, namedArgs, typeArgs}) => pop(positionalArgs.length > 0 ? positionalArgs[0] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            pop(positionalArgs.length > 0 ? positionalArgs[0] : null);
       case 'popUntil':
-        return ({positionalArgs, namedArgs, typeArgs}) => popUntil(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            popUntil(positionalArgs[0]);
       case 'removeRoute':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRoute(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeRoute(positionalArgs[0]);
       case 'removeRouteBelow':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRouteBelow(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeRouteBelow(positionalArgs[0]);
       case 'finalizeRoute':
-        return ({positionalArgs, namedArgs, typeArgs}) => finalizeRoute(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            finalizeRoute(positionalArgs[0]);
       case 'didStartUserGesture':
         return ({positionalArgs, namedArgs, typeArgs}) => didStartUserGesture();
       case 'didStopUserGesture':
         return ({positionalArgs, namedArgs, typeArgs}) => didStopUserGesture();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/nested_scroll_view.g.dart b/lib/bindings/flutter/widgets/nested_scroll_view.g.dart
index 040d1bc..a8dc090 100644
--- a/lib/bindings/flutter/widgets/nested_scroll_view.g.dart
+++ b/lib/bindings/flutter/widgets/nested_scroll_view.g.dart
@@ -13,22 +13,35 @@ class NestedScrollViewAutoBinding extends HTExternalClass {
       case 'NestedScrollView':
         return ({positionalArgs, namedArgs, typeArgs}) => NestedScrollView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
             headerSliverBuilder: namedArgs['headerSliverBuilder'],
             body: namedArgs['body'],
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            floatHeaderSlivers: namedArgs.containsKey('floatHeaderSlivers') ? namedArgs['floatHeaderSlivers'] : false,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null);
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            floatHeaderSlivers: namedArgs.containsKey('floatHeaderSlivers')
+                ? namedArgs['floatHeaderSlivers']
+                : false,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null);
       case 'NestedScrollView.sliverOverlapAbsorberHandleFor':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             NestedScrollView.sliverOverlapAbsorberHandleFor(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -39,8 +52,10 @@ class NestedScrollViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'NestedScrollViewHeaderSliversBuilder': (HTFunction function) => (context, innerBoxIsScrolled) =>
-          function.call(positionalArgs: [context, innerBoxIsScrolled], namedArgs: const {}) as List<Widget>,
+      'NestedScrollViewHeaderSliversBuilder': (HTFunction function) =>
+          (context, innerBoxIsScrolled) => function.call(
+              positionalArgs: [context, innerBoxIsScrolled],
+              namedArgs: const {}) as List<Widget>,
     };
   }
 }
@@ -49,7 +64,7 @@ extension NestedScrollViewBinding on NestedScrollView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NestedScrollView');
+        return const HTType('NestedScrollView');
       case 'controller':
         return controller;
       case 'scrollDirection':
@@ -81,25 +96,37 @@ extension NestedScrollViewBinding on NestedScrollView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -111,9 +138,10 @@ class NestedScrollViewStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NestedScrollViewState':
-        return ({positionalArgs, namedArgs, typeArgs}) => NestedScrollViewState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NestedScrollViewState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -127,7 +155,7 @@ extension NestedScrollViewStateBinding on NestedScrollViewState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NestedScrollViewState');
+        return const HTType('NestedScrollViewState');
       case 'innerController':
         return innerController;
       case 'outerController':
@@ -141,40 +169,48 @@ extension NestedScrollViewStateBinding on NestedScrollViewState {
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class SliverOverlapAbsorberHandleAutoBinding extends HTExternalClass {
-  SliverOverlapAbsorberHandleAutoBinding() : super('SliverOverlapAbsorberHandle');
+  SliverOverlapAbsorberHandleAutoBinding()
+      : super('SliverOverlapAbsorberHandle');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverOverlapAbsorberHandle':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverOverlapAbsorberHandle();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverOverlapAbsorberHandle();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -185,7 +221,8 @@ class SliverOverlapAbsorberHandleAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -194,7 +231,7 @@ extension SliverOverlapAbsorberHandleBinding on SliverOverlapAbsorberHandle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverOverlapAbsorberHandle');
+        return const HTType('SliverOverlapAbsorberHandle');
       case 'layoutExtent':
         return layoutExtent;
       case 'scrollExtent':
@@ -202,13 +239,15 @@ extension SliverOverlapAbsorberHandleBinding on SliverOverlapAbsorberHandle {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -223,9 +262,10 @@ class SliverOverlapAbsorberAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SliverOverlapAbsorber(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             handle: namedArgs['handle'],
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -239,7 +279,7 @@ extension SliverOverlapAbsorberBinding on SliverOverlapAbsorber {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverOverlapAbsorber');
+        return const HTType('SliverOverlapAbsorber');
       case 'handle':
         return handle;
       case 'child':
@@ -249,48 +289,67 @@ extension SliverOverlapAbsorberBinding on SliverOverlapAbsorber {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderSliverOverlapAbsorberAutoBinding extends HTExternalClass {
-  RenderSliverOverlapAbsorberAutoBinding() : super('RenderSliverOverlapAbsorber');
+  RenderSliverOverlapAbsorberAutoBinding()
+      : super('RenderSliverOverlapAbsorber');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverOverlapAbsorber':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverOverlapAbsorber(
-            handle: namedArgs['handle'], sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSliverOverlapAbsorber(
+                handle: namedArgs['handle'],
+                sliver: namedArgs.containsKey('sliver')
+                    ? namedArgs['sliver']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -306,8 +365,8 @@ class RenderSliverOverlapAbsorberAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -316,7 +375,7 @@ extension RenderSliverOverlapAbsorberBinding on RenderSliverOverlapAbsorber {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverOverlapAbsorber');
+        return const HTType('RenderSliverOverlapAbsorber');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -366,135 +425,205 @@ extension RenderSliverOverlapAbsorberBinding on RenderSliverOverlapAbsorber {
       case 'parent':
         return parent;
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugValidateChild(positionalArgs[0]);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -510,7 +639,7 @@ extension RenderSliverOverlapAbsorberBinding on RenderSliverOverlapAbsorber {
         handle = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -525,9 +654,10 @@ class SliverOverlapInjectorAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SliverOverlapInjector(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             handle: namedArgs['handle'],
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -541,7 +671,7 @@ extension SliverOverlapInjectorBinding on SliverOverlapInjector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverOverlapInjector');
+        return const HTType('SliverOverlapInjector');
       case 'handle':
         return handle;
       case 'child':
@@ -551,47 +681,63 @@ extension SliverOverlapInjectorBinding on SliverOverlapInjector {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderSliverOverlapInjectorAutoBinding extends HTExternalClass {
-  RenderSliverOverlapInjectorAutoBinding() : super('RenderSliverOverlapInjector');
+  RenderSliverOverlapInjectorAutoBinding()
+      : super('RenderSliverOverlapInjector');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderSliverOverlapInjector':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderSliverOverlapInjector(handle: namedArgs['handle']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderSliverOverlapInjector(handle: namedArgs['handle']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -607,8 +753,8 @@ class RenderSliverOverlapInjectorAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
@@ -617,7 +763,7 @@ extension RenderSliverOverlapInjectorBinding on RenderSliverOverlapInjector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderSliverOverlapInjector');
+        return const HTType('RenderSliverOverlapInjector');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -665,121 +811,185 @@ extension RenderSliverOverlapInjectorBinding on RenderSliverOverlapInjector {
       case 'parent':
         return parent;
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0],
-            mainAxisPosition: namedArgs.containsKey('mainAxisPosition') ? namedArgs['mainAxisPosition'] : null,
-            crossAxisPosition: namedArgs.containsKey('crossAxisPosition') ? namedArgs['crossAxisPosition'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            mainAxisPosition: namedArgs.containsKey('mainAxisPosition')
+                ? namedArgs['mainAxisPosition']
+                : null,
+            crossAxisPosition: namedArgs.containsKey('crossAxisPosition')
+                ? namedArgs['crossAxisPosition']
+                : null);
       case 'calculatePaintOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculatePaintOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'calculateCacheOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => calculateCacheOffset(
+            positionalArgs[0],
             from: namedArgs.containsKey('from') ? namedArgs['from'] : null,
             to: namedArgs.containsKey('to') ? namedArgs['to'] : null);
       case 'childScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => childScrollOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childScrollOffset(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsSemanticsUpdate();
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            visitChildrenForSemantics(positionalArgs[0]);
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
@@ -787,7 +997,7 @@ extension RenderSliverOverlapInjectorBinding on RenderSliverOverlapInjector {
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -803,7 +1013,7 @@ extension RenderSliverOverlapInjectorBinding on RenderSliverOverlapInjector {
         handle = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -815,18 +1025,30 @@ class NestedScrollViewViewportAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NestedScrollViewViewport':
-        return ({positionalArgs, namedArgs, typeArgs}) => NestedScrollViewViewport(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down,
-            crossAxisDirection: namedArgs.containsKey('crossAxisDirection') ? namedArgs['crossAxisDirection'] : null,
-            anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
-            offset: namedArgs['offset'],
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : null,
-            slivers: namedArgs.containsKey('slivers') ? List<Widget>.from(namedArgs['slivers']) : const <Widget>[],
-            handle: namedArgs['handle'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            NestedScrollViewViewport(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                axisDirection: namedArgs.containsKey('axisDirection')
+                    ? namedArgs['axisDirection']
+                    : AxisDirection.down,
+                crossAxisDirection: namedArgs.containsKey('crossAxisDirection')
+                    ? namedArgs['crossAxisDirection']
+                    : null,
+                anchor:
+                    namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
+                offset: namedArgs['offset'],
+                center: namedArgs.containsKey('center')
+                    ? namedArgs['center']
+                    : null,
+                slivers: namedArgs.containsKey('slivers')
+                    ? List<Widget>.from(namedArgs['slivers'])
+                    : const <Widget>[],
+                handle: namedArgs['handle'],
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -840,7 +1062,7 @@ extension NestedScrollViewViewportBinding on NestedScrollViewViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NestedScrollViewViewport');
+        return const HTType('NestedScrollViewViewport');
       case 'handle':
         return handle;
       case 'axisDirection':
@@ -866,55 +1088,80 @@ extension NestedScrollViewViewportBinding on NestedScrollViewViewport {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RenderNestedScrollViewViewportAutoBinding extends HTExternalClass {
-  RenderNestedScrollViewViewportAutoBinding() : super('RenderNestedScrollViewViewport');
+  RenderNestedScrollViewViewportAutoBinding()
+      : super('RenderNestedScrollViewViewport');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RenderNestedScrollViewViewport':
-        return ({positionalArgs, namedArgs, typeArgs}) => RenderNestedScrollViewViewport(
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down,
-            crossAxisDirection: namedArgs['crossAxisDirection'],
-            offset: namedArgs['offset'],
-            anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
-            children: namedArgs.containsKey('children') ? List<RenderSliver>.from(namedArgs['children']) : null,
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : null,
-            handle: namedArgs['handle'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RenderNestedScrollViewViewport(
+                axisDirection: namedArgs.containsKey('axisDirection')
+                    ? namedArgs['axisDirection']
+                    : AxisDirection.down,
+                crossAxisDirection: namedArgs['crossAxisDirection'],
+                offset: namedArgs['offset'],
+                anchor:
+                    namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
+                children: namedArgs.containsKey('children')
+                    ? List<RenderSliver>.from(namedArgs['children'])
+                    : null,
+                center: namedArgs.containsKey('center')
+                    ? namedArgs['center']
+                    : null,
+                handle: namedArgs['handle'],
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -930,17 +1177,18 @@ class RenderNestedScrollViewViewportAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'RenderObjectVisitor': (HTFunction function) =>
-          (child) => function.call(positionalArgs: [child], namedArgs: const {}),
+      'RenderObjectVisitor': (HTFunction function) => (child) =>
+          function.call(positionalArgs: [child], namedArgs: const {}),
     };
   }
 }
 
-extension RenderNestedScrollViewViewportBinding on RenderNestedScrollViewViewport {
+extension RenderNestedScrollViewViewportBinding
+    on RenderNestedScrollViewViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RenderNestedScrollViewViewport');
+        return const HTType('RenderNestedScrollViewViewport');
       case 'parentData':
         return parentData;
       case 'debugCreator':
@@ -1024,199 +1272,303 @@ extension RenderNestedScrollViewViewportBinding on RenderNestedScrollViewViewpor
       case 'markNeedsLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayout();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'setupParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => setupParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setupParentData(positionalArgs[0]);
       case 'computeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeDryLayout(positionalArgs[0]);
       case 'performLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => performLayout();
       case 'updateOutOfBandData':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateOutOfBandData(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateOutOfBandData(positionalArgs[0], positionalArgs[1]);
       case 'updateChildLayoutOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            updateChildLayoutOffset(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            updateChildLayoutOffset(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'paintOffsetOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => paintOffsetOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paintOffsetOf(positionalArgs[0]);
       case 'scrollOffsetOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => scrollOffsetOf(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scrollOffsetOf(positionalArgs[0], positionalArgs[1]);
       case 'maxScrollObstructionExtentBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => maxScrollObstructionExtentBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            maxScrollObstructionExtentBefore(positionalArgs[0]);
       case 'applyPaintTransform':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyPaintTransform(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyPaintTransform(positionalArgs[0], positionalArgs[1]);
       case 'computeChildMainAxisPosition':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             computeChildMainAxisPosition(positionalArgs[0], positionalArgs[1]);
       case 'labelForChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => labelForChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            labelForChild(positionalArgs[0]);
       case 'describeSemanticsConfiguration':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsConfiguration(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsConfiguration(positionalArgs[0]);
       case 'visitChildrenForSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildrenForSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildrenForSemantics(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       case 'computeMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicWidth(positionalArgs[0]);
       case 'computeMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicWidth(positionalArgs[0]);
       case 'computeMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMinIntrinsicHeight(positionalArgs[0]);
       case 'computeMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            computeMaxIntrinsicHeight(positionalArgs[0]);
       case 'describeApproximatePaintClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeApproximatePaintClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeApproximatePaintClip(positionalArgs[0]);
       case 'describeSemanticsClip':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeSemanticsClip(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeSemanticsClip(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'debugPaintSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaintSize(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaintSize(positionalArgs[0], positionalArgs[1]);
       case 'hitTestChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(positionalArgs[0],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTestChildren(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'getOffsetToReveal':
-        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(positionalArgs[0], positionalArgs[1],
+        return ({positionalArgs, namedArgs, typeArgs}) => getOffsetToReveal(
+            positionalArgs[0], positionalArgs[1],
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'showOnScreen':
         return ({positionalArgs, namedArgs, typeArgs}) => showOnScreen(
-            descendant: namedArgs.containsKey('descendant') ? namedArgs['descendant'] : null,
+            descendant: namedArgs.containsKey('descendant')
+                ? namedArgs['descendant']
+                : null,
             rect: namedArgs.containsKey('rect') ? namedArgs['rect'] : null,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease);
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease);
       case 'debugValidateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugValidateChild(positionalArgs[0]);
-      case 'insert':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            insert(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+            debugValidateChild(positionalArgs[0]);
+      case 'insert':
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'add':
-        return ({positionalArgs, namedArgs, typeArgs}) => add(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            add(positionalArgs[0]);
       case 'addAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => addAll(List<RenderSliver>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addAll(List<RenderSliver>.from(positionalArgs[0]));
       case 'remove':
-        return ({positionalArgs, namedArgs, typeArgs}) => remove(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            remove(positionalArgs[0]);
       case 'removeAll':
         return ({positionalArgs, namedArgs, typeArgs}) => removeAll();
       case 'move':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            move(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => move(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'redepthChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => redepthChildren();
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'childBefore':
-        return ({positionalArgs, namedArgs, typeArgs}) => childBefore(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childBefore(positionalArgs[0]);
       case 'childAfter':
-        return ({positionalArgs, namedArgs, typeArgs}) => childAfter(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            childAfter(positionalArgs[0]);
       case 'getMinIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicWidth(positionalArgs[0]);
       case 'getMaxIntrinsicWidth':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicWidth(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicWidth(positionalArgs[0]);
       case 'getMinIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMinIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMinIntrinsicHeight(positionalArgs[0]);
       case 'getMaxIntrinsicHeight':
-        return ({positionalArgs, namedArgs, typeArgs}) => getMaxIntrinsicHeight(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getMaxIntrinsicHeight(positionalArgs[0]);
       case 'getDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDryLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getDryLayout(positionalArgs[0]);
       case 'debugCannotComputeDryLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCannotComputeDryLayout(
-            reason: namedArgs.containsKey('reason') ? namedArgs['reason'] : null,
-            error: namedArgs.containsKey('error') ? namedArgs['error'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCannotComputeDryLayout(
+                reason: namedArgs.containsKey('reason')
+                    ? namedArgs['reason']
+                    : null,
+                error:
+                    namedArgs.containsKey('error') ? namedArgs['error'] : null);
       case 'debugAdoptSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAdoptSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAdoptSize(positionalArgs[0]);
       case 'debugResetSize':
         return ({positionalArgs, namedArgs, typeArgs}) => debugResetSize();
       case 'getDistanceToBaseline':
-        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(positionalArgs[0],
-            onlyReal: namedArgs.containsKey('onlyReal') ? namedArgs['onlyReal'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => getDistanceToBaseline(
+            positionalArgs[0],
+            onlyReal: namedArgs.containsKey('onlyReal')
+                ? namedArgs['onlyReal']
+                : false);
       case 'debugAssertDoesMeetConstraints':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertDoesMeetConstraints();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertDoesMeetConstraints();
       case 'performResize':
         return ({positionalArgs, namedArgs, typeArgs}) => performResize();
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            hitTest(positionalArgs[0], position: namedArgs.containsKey('position') ? namedArgs['position'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(
+            positionalArgs[0],
+            position: namedArgs.containsKey('position')
+                ? namedArgs['position']
+                : null);
       case 'globalToLocal':
-        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => globalToLocal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'localToGlobal':
-        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(positionalArgs[0],
-            ancestor: namedArgs.containsKey('ancestor') ? namedArgs['ancestor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => localToGlobal(
+            positionalArgs[0],
+            ancestor: namedArgs.containsKey('ancestor')
+                ? namedArgs['ancestor']
+                : null);
       case 'handleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => handleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            handleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugHandleEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugHandleEvent(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugHandleEvent(positionalArgs[0], positionalArgs[1]);
       case 'debugPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugPaint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugPaint(positionalArgs[0], positionalArgs[1]);
       case 'reassemble':
         return ({positionalArgs, namedArgs, typeArgs}) => reassemble();
       case 'adoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => adoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adoptChild(positionalArgs[0]);
       case 'dropChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => dropChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dropChild(positionalArgs[0]);
       case 'markNeedsLayoutForSizedByParentChange':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsLayoutForSizedByParentChange();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsLayoutForSizedByParentChange();
       case 'scheduleInitialLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialLayout();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialLayout();
       case 'layout':
-        return ({positionalArgs, namedArgs, typeArgs}) => layout(positionalArgs[0],
-            parentUsesSize: namedArgs.containsKey('parentUsesSize') ? namedArgs['parentUsesSize'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => layout(
+            positionalArgs[0],
+            parentUsesSize: namedArgs.containsKey('parentUsesSize')
+                ? namedArgs['parentUsesSize']
+                : false);
       case 'rotate':
         return ({positionalArgs, namedArgs, typeArgs}) => rotate(
-            oldAngle: namedArgs.containsKey('oldAngle') ? namedArgs['oldAngle'] : null,
-            newAngle: namedArgs.containsKey('newAngle') ? namedArgs['newAngle'] : null,
+            oldAngle: namedArgs.containsKey('oldAngle')
+                ? namedArgs['oldAngle']
+                : null,
+            newAngle: namedArgs.containsKey('newAngle')
+                ? namedArgs['newAngle']
+                : null,
             time: namedArgs.containsKey('time') ? namedArgs['time'] : null);
       case 'debugRegisterRepaintBoundaryPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugRegisterRepaintBoundaryPaint(
-            includedParent: namedArgs.containsKey('includedParent') ? namedArgs['includedParent'] : true,
-            includedChild: namedArgs.containsKey('includedChild') ? namedArgs['includedChild'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugRegisterRepaintBoundaryPaint(
+                includedParent: namedArgs.containsKey('includedParent')
+                    ? namedArgs['includedParent']
+                    : true,
+                includedChild: namedArgs.containsKey('includedChild')
+                    ? namedArgs['includedChild']
+                    : false);
       case 'markNeedsCompositingBitsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsCompositingBitsUpdate();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            markNeedsCompositingBitsUpdate();
       case 'markNeedsPaint':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsPaint();
       case 'scheduleInitialPaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialPaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialPaint(positionalArgs[0]);
       case 'replaceRootLayer':
-        return ({positionalArgs, namedArgs, typeArgs}) => replaceRootLayer(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            replaceRootLayer(positionalArgs[0]);
       case 'getTransformTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTransformTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTransformTo(positionalArgs[0]);
       case 'scheduleInitialSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => scheduleInitialSemantics();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            scheduleInitialSemantics();
       case 'sendSemanticsEvent':
-        return ({positionalArgs, namedArgs, typeArgs}) => sendSemanticsEvent(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            sendSemanticsEvent(positionalArgs[0]);
       case 'clearSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => clearSemantics();
       case 'markNeedsSemanticsUpdate':
-        return ({positionalArgs, namedArgs, typeArgs}) => markNeedsSemanticsUpdate();
-      case 'assembleSemanticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            assembleSemanticsNode(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            markNeedsSemanticsUpdate();
+      case 'assembleSemanticsNode':
+        return ({positionalArgs, namedArgs, typeArgs}) => assembleSemanticsNode(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : '',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : '',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'describeForError':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.shallow);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeForError(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.shallow);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -1232,7 +1584,7 @@ extension RenderNestedScrollViewViewportBinding on RenderNestedScrollViewViewpor
         handle = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/notification_listener.g.dart b/lib/bindings/flutter/widgets/notification_listener.g.dart
index 30822f6..543db5f 100644
--- a/lib/bindings/flutter/widgets/notification_listener.g.dart
+++ b/lib/bindings/flutter/widgets/notification_listener.g.dart
@@ -8,9 +8,10 @@ class LayoutChangedNotificationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LayoutChangedNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => LayoutChangedNotification();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LayoutChangedNotification();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +25,14 @@ extension LayoutChangedNotificationBinding on LayoutChangedNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LayoutChangedNotification');
+        return const HTType('LayoutChangedNotification');
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/orientation_builder.g.dart b/lib/bindings/flutter/widgets/orientation_builder.g.dart
index 276385e..9a3fb55 100644
--- a/lib/bindings/flutter/widgets/orientation_builder.g.dart
+++ b/lib/bindings/flutter/widgets/orientation_builder.g.dart
@@ -9,9 +9,10 @@ class OrientationBuilderAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'OrientationBuilder':
         return ({positionalArgs, namedArgs, typeArgs}) => OrientationBuilder(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null, builder: namedArgs['builder']);
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            builder: namedArgs['builder']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,8 +23,10 @@ class OrientationBuilderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'OrientationWidgetBuilder': (HTFunction function) => (context, orientation) =>
-          function.call(positionalArgs: [context, orientation], namedArgs: const {}) as Widget,
+      'OrientationWidgetBuilder': (HTFunction function) =>
+          (context, orientation) => function.call(
+              positionalArgs: [context, orientation],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -32,7 +35,7 @@ extension OrientationBuilderBinding on OrientationBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OrientationBuilder');
+        return const HTType('OrientationBuilder');
       case 'builder':
         return builder;
       case 'key':
@@ -40,31 +43,44 @@ extension OrientationBuilderBinding on OrientationBuilder {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/overflow_bar.g.dart b/lib/bindings/flutter/widgets/overflow_bar.g.dart
index 9521180..48d9388 100644
--- a/lib/bindings/flutter/widgets/overflow_bar.g.dart
+++ b/lib/bindings/flutter/widgets/overflow_bar.g.dart
@@ -18,7 +18,7 @@ class OverflowBarAlignmentAutoBinding extends HTExternalClass {
       case 'OverflowBarAlignment.center':
         return OverflowBarAlignment.center;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +26,14 @@ class OverflowBarAlignmentAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverflowBarAlignment');
+        return const HTType('OverflowBarAlignment');
       case 'index':
         return (instance as OverflowBarAlignment).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as OverflowBarAlignment).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as OverflowBarAlignment).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -46,18 +47,28 @@ class OverflowBarAutoBinding extends HTExternalClass {
       case 'OverflowBar':
         return ({positionalArgs, namedArgs, typeArgs}) => OverflowBar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            spacing: namedArgs.containsKey('spacing') ? namedArgs['spacing'] : 0.0,
-            overflowSpacing: namedArgs.containsKey('overflowSpacing') ? namedArgs['overflowSpacing'] : 0.0,
+            spacing:
+                namedArgs.containsKey('spacing') ? namedArgs['spacing'] : 0.0,
+            overflowSpacing: namedArgs.containsKey('overflowSpacing')
+                ? namedArgs['overflowSpacing']
+                : 0.0,
             overflowAlignment: namedArgs.containsKey('overflowAlignment')
                 ? namedArgs['overflowAlignment']
                 : OverflowBarAlignment.start,
-            overflowDirection:
-                namedArgs.containsKey('overflowDirection') ? namedArgs['overflowDirection'] : VerticalDirection.down,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.none,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            overflowDirection: namedArgs.containsKey('overflowDirection')
+                ? namedArgs['overflowDirection']
+                : VerticalDirection.down,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.none,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -71,7 +82,7 @@ extension OverflowBarBinding on OverflowBar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverflowBar');
+        return const HTType('OverflowBar');
       case 'spacing':
         return spacing;
       case 'overflowSpacing':
@@ -91,33 +102,47 @@ extension OverflowBarBinding on OverflowBar {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/overlay.g.dart b/lib/bindings/flutter/widgets/overlay.g.dart
index 61e2ace..9ac00db 100644
--- a/lib/bindings/flutter/widgets/overlay.g.dart
+++ b/lib/bindings/flutter/widgets/overlay.g.dart
@@ -12,10 +12,13 @@ class OverlayEntryAutoBinding extends HTExternalClass {
       case 'OverlayEntry':
         return ({positionalArgs, namedArgs, typeArgs}) => OverlayEntry(
             builder: namedArgs['builder'],
-            opaque: namedArgs.containsKey('opaque') ? namedArgs['opaque'] : false,
-            maintainState: namedArgs.containsKey('maintainState') ? namedArgs['maintainState'] : false);
+            opaque:
+                namedArgs.containsKey('opaque') ? namedArgs['opaque'] : false,
+            maintainState: namedArgs.containsKey('maintainState')
+                ? namedArgs['maintainState']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,9 +34,10 @@ class OverlayEntryAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'WidgetBuilder': (HTFunction function) =>
-          (context) => function.call(positionalArgs: [context], namedArgs: const {}) as Widget,
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'WidgetBuilder': (HTFunction function) => (context) => function
+          .call(positionalArgs: [context], namedArgs: const {}) as Widget,
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -42,7 +46,7 @@ extension OverlayEntryBinding on OverlayEntry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverlayEntry');
+        return const HTType('OverlayEntry');
       case 'builder':
         return builder;
       case 'opaque':
@@ -58,13 +62,15 @@ extension OverlayEntryBinding on OverlayEntry {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -77,7 +83,7 @@ extension OverlayEntryBinding on OverlayEntry {
         maintainState = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -94,13 +100,20 @@ class OverlayAutoBinding extends HTExternalClass {
             initialEntries: namedArgs.containsKey('initialEntries')
                 ? List<OverlayEntry>.from(namedArgs['initialEntries'])
                 : const <OverlayEntry>[],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'Overlay.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Overlay.of(positionalArgs[0],
-            rootOverlay: namedArgs.containsKey('rootOverlay') ? namedArgs['rootOverlay'] : false,
-            debugRequiredFor: namedArgs.containsKey('debugRequiredFor') ? namedArgs['debugRequiredFor'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => Overlay.of(
+            positionalArgs[0],
+            rootOverlay: namedArgs.containsKey('rootOverlay')
+                ? namedArgs['rootOverlay']
+                : false,
+            debugRequiredFor: namedArgs.containsKey('debugRequiredFor')
+                ? namedArgs['debugRequiredFor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -114,7 +127,7 @@ extension OverlayBinding on Overlay {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Overlay');
+        return const HTType('Overlay');
       case 'initialEntries':
         return initialEntries;
       case 'clipBehavior':
@@ -130,25 +143,37 @@ extension OverlayBinding on Overlay {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -162,7 +187,7 @@ class OverlayStateAutoBinding extends HTExternalClass {
       case 'OverlayState':
         return ({positionalArgs, namedArgs, typeArgs}) => OverlayState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -173,8 +198,8 @@ class OverlayStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -183,7 +208,7 @@ extension OverlayStateBinding on OverlayState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverlayState');
+        return const HTType('OverlayState');
       case 'widget':
         return widget;
       case 'context':
@@ -193,40 +218,50 @@ extension OverlayStateBinding on OverlayState {
       case 'initState':
         return ({positionalArgs, namedArgs, typeArgs}) => initState();
       case 'insert':
-        return ({positionalArgs, namedArgs, typeArgs}) => insert(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => insert(
+            positionalArgs[0],
             below: namedArgs.containsKey('below') ? namedArgs['below'] : null,
             above: namedArgs.containsKey('above') ? namedArgs['above'] : null);
       case 'insertAll':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertAll(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => insertAll(
+            positionalArgs[0],
             below: namedArgs.containsKey('below') ? namedArgs['below'] : null,
             above: namedArgs.containsKey('above') ? namedArgs['above'] : null);
       case 'rearrange':
-        return ({positionalArgs, namedArgs, typeArgs}) => rearrange(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => rearrange(
+            positionalArgs[0],
             below: namedArgs.containsKey('below') ? namedArgs['below'] : null,
             above: namedArgs.containsKey('above') ? namedArgs['above'] : null);
       case 'debugIsVisible':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugIsVisible(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugIsVisible(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/overscroll_indicator.g.dart b/lib/bindings/flutter/widgets/overscroll_indicator.g.dart
index 4bfbc24..3f02916 100644
--- a/lib/bindings/flutter/widgets/overscroll_indicator.g.dart
+++ b/lib/bindings/flutter/widgets/overscroll_indicator.g.dart
@@ -10,18 +10,25 @@ class GlowingOverscrollIndicatorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'GlowingOverscrollIndicator':
-        return ({positionalArgs, namedArgs, typeArgs}) => GlowingOverscrollIndicator(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            showLeading: namedArgs.containsKey('showLeading') ? namedArgs['showLeading'] : true,
-            showTrailing: namedArgs.containsKey('showTrailing') ? namedArgs['showTrailing'] : true,
-            axisDirection: namedArgs['axisDirection'],
-            color: namedArgs['color'],
-            notificationPredicate: namedArgs.containsKey('notificationPredicate')
-                ? namedArgs['notificationPredicate']
-                : defaultScrollNotificationPredicate,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            GlowingOverscrollIndicator(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                showLeading: namedArgs.containsKey('showLeading')
+                    ? namedArgs['showLeading']
+                    : true,
+                showTrailing: namedArgs.containsKey('showTrailing')
+                    ? namedArgs['showTrailing']
+                    : true,
+                axisDirection: namedArgs['axisDirection'],
+                color: namedArgs['color'],
+                notificationPredicate:
+                    namedArgs.containsKey('notificationPredicate')
+                        ? namedArgs['notificationPredicate']
+                        : defaultScrollNotificationPredicate,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,8 +39,9 @@ class GlowingOverscrollIndicatorAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ScrollNotificationPredicate': (HTFunction function) =>
-          (notification) => function.call(positionalArgs: [notification], namedArgs: const {}) as bool,
+      'ScrollNotificationPredicate': (HTFunction function) => (notification) =>
+          function.call(positionalArgs: [notification], namedArgs: const {})
+              as bool,
     };
   }
 }
@@ -42,7 +50,7 @@ extension GlowingOverscrollIndicatorBinding on GlowingOverscrollIndicator {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GlowingOverscrollIndicator');
+        return const HTType('GlowingOverscrollIndicator');
       case 'showLeading':
         return showLeading;
       case 'showTrailing':
@@ -64,35 +72,48 @@ extension GlowingOverscrollIndicatorBinding on GlowingOverscrollIndicator {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class OverscrollIndicatorNotificationAutoBinding extends HTExternalClass {
-  OverscrollIndicatorNotificationAutoBinding() : super('OverscrollIndicatorNotification');
+  OverscrollIndicatorNotificationAutoBinding()
+      : super('OverscrollIndicatorNotification');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
@@ -101,7 +122,7 @@ class OverscrollIndicatorNotificationAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             OverscrollIndicatorNotification(leading: namedArgs['leading']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -116,11 +137,12 @@ class OverscrollIndicatorNotificationAutoBinding extends HTExternalClass {
   }
 }
 
-extension OverscrollIndicatorNotificationBinding on OverscrollIndicatorNotification {
+extension OverscrollIndicatorNotificationBinding
+    on OverscrollIndicatorNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverscrollIndicatorNotification');
+        return const HTType('OverscrollIndicatorNotification');
       case 'leading':
         return leading;
       case 'paintOffset':
@@ -130,15 +152,18 @@ extension OverscrollIndicatorNotificationBinding on OverscrollIndicatorNotificat
       case 'disallowGlow':
         return ({positionalArgs, namedArgs, typeArgs}) => disallowGlow();
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'visitAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestor(positionalArgs[0]);
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -148,7 +173,7 @@ extension OverscrollIndicatorNotificationBinding on OverscrollIndicatorNotificat
         paintOffset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/page_storage.g.dart b/lib/bindings/flutter/widgets/page_storage.g.dart
index 0f6b2b3..e909980 100644
--- a/lib/bindings/flutter/widgets/page_storage.g.dart
+++ b/lib/bindings/flutter/widgets/page_storage.g.dart
@@ -11,7 +11,7 @@ class PageStorageBucketAutoBinding extends HTExternalClass {
       case 'PageStorageBucket':
         return ({positionalArgs, namedArgs, typeArgs}) => PageStorageBucket();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,15 +25,21 @@ extension PageStorageBucketBinding on PageStorageBucket {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PageStorageBucket');
+        return const HTType('PageStorageBucket');
       case 'writeState':
-        return ({positionalArgs, namedArgs, typeArgs}) => writeState(positionalArgs[0], positionalArgs[1],
-            identifier: namedArgs.containsKey('identifier') ? namedArgs['identifier'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => writeState(
+            positionalArgs[0], positionalArgs[1],
+            identifier: namedArgs.containsKey('identifier')
+                ? namedArgs['identifier']
+                : null);
       case 'readState':
-        return ({positionalArgs, namedArgs, typeArgs}) => readState(positionalArgs[0],
-            identifier: namedArgs.containsKey('identifier') ? namedArgs['identifier'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => readState(
+            positionalArgs[0],
+            identifier: namedArgs.containsKey('identifier')
+                ? namedArgs['identifier']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -50,9 +56,10 @@ class PageStorageAutoBinding extends HTExternalClass {
             bucket: namedArgs['bucket'],
             child: namedArgs['child']);
       case 'PageStorage.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => PageStorage.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PageStorage.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +73,7 @@ extension PageStorageBinding on PageStorage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PageStorage');
+        return const HTType('PageStorage');
       case 'child':
         return child;
       case 'bucket':
@@ -76,31 +83,44 @@ extension PageStorageBinding on PageStorage {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/page_view.g.dart b/lib/bindings/flutter/widgets/page_view.g.dart
index c9e59ac..c4ad24b 100644
--- a/lib/bindings/flutter/widgets/page_view.g.dart
+++ b/lib/bindings/flutter/widgets/page_view.g.dart
@@ -12,11 +12,17 @@ class PageControllerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'PageController':
         return ({positionalArgs, namedArgs, typeArgs}) => PageController(
-            initialPage: namedArgs.containsKey('initialPage') ? namedArgs['initialPage'] : 0,
-            keepPage: namedArgs.containsKey('keepPage') ? namedArgs['keepPage'] : true,
-            viewportFraction: namedArgs.containsKey('viewportFraction') ? namedArgs['viewportFraction'] : 1.0);
+            initialPage: namedArgs.containsKey('initialPage')
+                ? namedArgs['initialPage']
+                : 0,
+            keepPage: namedArgs.containsKey('keepPage')
+                ? namedArgs['keepPage']
+                : true,
+            viewportFraction: namedArgs.containsKey('viewportFraction')
+                ? namedArgs['viewportFraction']
+                : 1.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +33,8 @@ class PageControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -36,7 +43,7 @@ extension PageControllerBinding on PageController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PageController');
+        return const HTType('PageController');
       case 'initialPage':
         return initialPage;
       case 'keepPage':
@@ -58,44 +65,61 @@ extension PageControllerBinding on PageController {
       case 'offset':
         return offset;
       case 'animateToPage':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateToPage(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateToPage(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'jumpToPage':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpToPage(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            jumpToPage(positionalArgs[0]);
       case 'nextPage':
         return ({positionalArgs, namedArgs, typeArgs}) => nextPage(
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'previousPage':
         return ({positionalArgs, namedArgs, typeArgs}) => previousPage(
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'createScrollPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createScrollPosition(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => createScrollPosition(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'jumpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            jumpTo(positionalArgs[0]);
       case 'detach':
-        return ({positionalArgs, namedArgs, typeArgs}) => detach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            detach(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -115,7 +139,7 @@ class PageMetricsAutoBinding extends HTExternalClass {
             axisDirection: namedArgs['axisDirection'],
             viewportFraction: namedArgs['viewportFraction']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -129,7 +153,7 @@ extension PageMetricsBinding on PageMetrics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PageMetrics');
+        return const HTType('PageMetrics');
       case 'viewportFraction':
         return viewportFraction;
       case 'axisDirection':
@@ -164,16 +188,27 @@ extension PageMetricsBinding on PageMetrics {
         return extentAfter;
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            minScrollExtent: namedArgs.containsKey('minScrollExtent') ? namedArgs['minScrollExtent'] : null,
-            maxScrollExtent: namedArgs.containsKey('maxScrollExtent') ? namedArgs['maxScrollExtent'] : null,
-            pixels: namedArgs.containsKey('pixels') ? namedArgs['pixels'] : null,
-            viewportDimension: namedArgs.containsKey('viewportDimension') ? namedArgs['viewportDimension'] : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : null,
-            viewportFraction: namedArgs.containsKey('viewportFraction') ? namedArgs['viewportFraction'] : null);
+            minScrollExtent: namedArgs.containsKey('minScrollExtent')
+                ? namedArgs['minScrollExtent']
+                : null,
+            maxScrollExtent: namedArgs.containsKey('maxScrollExtent')
+                ? namedArgs['maxScrollExtent']
+                : null,
+            pixels:
+                namedArgs.containsKey('pixels') ? namedArgs['pixels'] : null,
+            viewportDimension: namedArgs.containsKey('viewportDimension')
+                ? namedArgs['viewportDimension']
+                : null,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : null,
+            viewportFraction: namedArgs.containsKey('viewportFraction')
+                ? namedArgs['viewportFraction']
+                : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -185,10 +220,11 @@ class PageScrollPhysicsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PageScrollPhysics':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            PageScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => PageScrollPhysics(
+            parent:
+                namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -202,7 +238,7 @@ extension PageScrollPhysicsBinding on PageScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PageScrollPhysics');
+        return const HTType('PageScrollPhysics');
       case 'parent':
         return parent;
       case 'allowImplicitScrolling':
@@ -220,7 +256,8 @@ extension PageScrollPhysicsBinding on PageScrollPhysics {
       case 'dragStartDistanceMotionThreshold':
         return dragStartDistanceMotionThreshold;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
@@ -228,24 +265,37 @@ extension PageScrollPhysicsBinding on PageScrollPhysics {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -259,54 +309,109 @@ class PageViewAutoBinding extends HTExternalClass {
       case 'PageView':
         return ({positionalArgs, namedArgs, typeArgs}) => PageView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.horizontal,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            pageSnapping: namedArgs.containsKey('pageSnapping') ? namedArgs['pageSnapping'] : true,
-            onPageChanged: namedArgs.containsKey('onPageChanged') ? namedArgs['onPageChanged'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.horizontal,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            pageSnapping: namedArgs.containsKey('pageSnapping')
+                ? namedArgs['pageSnapping']
+                : true,
+            onPageChanged: namedArgs.containsKey('onPageChanged')
+                ? namedArgs['onPageChanged']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             allowImplicitScrolling:
-                namedArgs.containsKey('allowImplicitScrolling') ? namedArgs['allowImplicitScrolling'] : false,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+                namedArgs.containsKey('allowImplicitScrolling')
+                    ? namedArgs['allowImplicitScrolling']
+                    : false,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       case 'PageView.builder':
         return ({positionalArgs, namedArgs, typeArgs}) => PageView.builder(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.horizontal,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            pageSnapping: namedArgs.containsKey('pageSnapping') ? namedArgs['pageSnapping'] : true,
-            onPageChanged: namedArgs.containsKey('onPageChanged') ? namedArgs['onPageChanged'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.horizontal,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            pageSnapping: namedArgs.containsKey('pageSnapping')
+                ? namedArgs['pageSnapping']
+                : true,
+            onPageChanged: namedArgs.containsKey('onPageChanged')
+                ? namedArgs['onPageChanged']
+                : null,
             itemBuilder: namedArgs['itemBuilder'],
-            itemCount: namedArgs.containsKey('itemCount') ? namedArgs['itemCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            itemCount: namedArgs.containsKey('itemCount')
+                ? namedArgs['itemCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             allowImplicitScrolling:
-                namedArgs.containsKey('allowImplicitScrolling') ? namedArgs['allowImplicitScrolling'] : false,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+                namedArgs.containsKey('allowImplicitScrolling')
+                    ? namedArgs['allowImplicitScrolling']
+                    : false,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'PageView.custom':
         return ({positionalArgs, namedArgs, typeArgs}) => PageView.custom(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.horizontal,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            pageSnapping: namedArgs.containsKey('pageSnapping') ? namedArgs['pageSnapping'] : true,
-            onPageChanged: namedArgs.containsKey('onPageChanged') ? namedArgs['onPageChanged'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.horizontal,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            pageSnapping: namedArgs.containsKey('pageSnapping')
+                ? namedArgs['pageSnapping']
+                : true,
+            onPageChanged: namedArgs.containsKey('onPageChanged')
+                ? namedArgs['onPageChanged']
+                : null,
             childrenDelegate: namedArgs['childrenDelegate'],
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             allowImplicitScrolling:
-                namedArgs.containsKey('allowImplicitScrolling') ? namedArgs['allowImplicitScrolling'] : false,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+                namedArgs.containsKey('allowImplicitScrolling')
+                    ? namedArgs['allowImplicitScrolling']
+                    : false,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -317,8 +422,9 @@ class PageViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'IndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget,
+      'IndexedWidgetBuilder': (HTFunction function) => (context, index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget,
     };
   }
 }
@@ -327,7 +433,7 @@ extension PageViewBinding on PageView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PageView');
+        return const HTType('PageView');
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'restorationId':
@@ -361,25 +467,37 @@ extension PageViewBinding on PageView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/performance_overlay.g.dart b/lib/bindings/flutter/widgets/performance_overlay.g.dart
index 0815e90..b32e8c8 100644
--- a/lib/bindings/flutter/widgets/performance_overlay.g.dart
+++ b/lib/bindings/flutter/widgets/performance_overlay.g.dart
@@ -11,26 +11,38 @@ class PerformanceOverlayAutoBinding extends HTExternalClass {
       case 'PerformanceOverlay':
         return ({positionalArgs, namedArgs, typeArgs}) => PerformanceOverlay(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            optionsMask: namedArgs.containsKey('optionsMask') ? namedArgs['optionsMask'] : 0,
-            rasterizerThreshold: namedArgs.containsKey('rasterizerThreshold') ? namedArgs['rasterizerThreshold'] : 0,
-            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
-                ? namedArgs['checkerboardRasterCacheImages']
-                : false,
-            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers')
-                ? namedArgs['checkerboardOffscreenLayers']
-                : false);
+            optionsMask: namedArgs.containsKey('optionsMask')
+                ? namedArgs['optionsMask']
+                : 0,
+            rasterizerThreshold: namedArgs.containsKey('rasterizerThreshold')
+                ? namedArgs['rasterizerThreshold']
+                : 0,
+            checkerboardRasterCacheImages:
+                namedArgs.containsKey('checkerboardRasterCacheImages')
+                    ? namedArgs['checkerboardRasterCacheImages']
+                    : false,
+            checkerboardOffscreenLayers:
+                namedArgs.containsKey('checkerboardOffscreenLayers')
+                    ? namedArgs['checkerboardOffscreenLayers']
+                    : false);
       case 'PerformanceOverlay.allEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => PerformanceOverlay.allEnabled(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            rasterizerThreshold: namedArgs.containsKey('rasterizerThreshold') ? namedArgs['rasterizerThreshold'] : 0,
-            checkerboardRasterCacheImages: namedArgs.containsKey('checkerboardRasterCacheImages')
-                ? namedArgs['checkerboardRasterCacheImages']
-                : false,
-            checkerboardOffscreenLayers: namedArgs.containsKey('checkerboardOffscreenLayers')
-                ? namedArgs['checkerboardOffscreenLayers']
-                : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PerformanceOverlay.allEnabled(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                rasterizerThreshold:
+                    namedArgs.containsKey('rasterizerThreshold')
+                        ? namedArgs['rasterizerThreshold']
+                        : 0,
+                checkerboardRasterCacheImages: namedArgs
+                        .containsKey('checkerboardRasterCacheImages')
+                    ? namedArgs['checkerboardRasterCacheImages']
+                    : false,
+                checkerboardOffscreenLayers:
+                    namedArgs.containsKey('checkerboardOffscreenLayers')
+                        ? namedArgs['checkerboardOffscreenLayers']
+                        : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -44,7 +56,7 @@ extension PerformanceOverlayBinding on PerformanceOverlay {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PerformanceOverlay');
+        return const HTType('PerformanceOverlay');
       case 'optionsMask':
         return optionsMask;
       case 'rasterizerThreshold':
@@ -58,33 +70,47 @@ extension PerformanceOverlayBinding on PerformanceOverlay {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/placeholder.g.dart b/lib/bindings/flutter/widgets/placeholder.g.dart
index 6cd3184..3579332 100644
--- a/lib/bindings/flutter/widgets/placeholder.g.dart
+++ b/lib/bindings/flutter/widgets/placeholder.g.dart
@@ -10,12 +10,20 @@ class PlaceholderAutoBinding extends HTExternalClass {
       case 'Placeholder':
         return ({positionalArgs, namedArgs, typeArgs}) => Placeholder(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            color: namedArgs.containsKey('color') ? namedArgs['color'] : const Color(0xFF455A64),
-            strokeWidth: namedArgs.containsKey('strokeWidth') ? namedArgs['strokeWidth'] : 2.0,
-            fallbackWidth: namedArgs.containsKey('fallbackWidth') ? namedArgs['fallbackWidth'] : 400.0,
-            fallbackHeight: namedArgs.containsKey('fallbackHeight') ? namedArgs['fallbackHeight'] : 400.0);
+            color: namedArgs.containsKey('color')
+                ? namedArgs['color']
+                : const Color(0xFF455A64),
+            strokeWidth: namedArgs.containsKey('strokeWidth')
+                ? namedArgs['strokeWidth']
+                : 2.0,
+            fallbackWidth: namedArgs.containsKey('fallbackWidth')
+                ? namedArgs['fallbackWidth']
+                : 400.0,
+            fallbackHeight: namedArgs.containsKey('fallbackHeight')
+                ? namedArgs['fallbackHeight']
+                : 400.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +37,7 @@ extension PlaceholderBinding on Placeholder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Placeholder');
+        return const HTType('Placeholder');
       case 'color':
         return color;
       case 'strokeWidth':
@@ -43,31 +51,44 @@ extension PlaceholderBinding on Placeholder {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/platform_view.g.dart b/lib/bindings/flutter/widgets/platform_view.g.dart
index 930ae40..0c433d7 100644
--- a/lib/bindings/flutter/widgets/platform_view.g.dart
+++ b/lib/bindings/flutter/widgets/platform_view.g.dart
@@ -15,17 +15,29 @@ class AndroidViewAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             viewType: namedArgs['viewType'],
             onPlatformViewCreated:
-                namedArgs.containsKey('onPlatformViewCreated') ? namedArgs['onPlatformViewCreated'] : null,
+                namedArgs.containsKey('onPlatformViewCreated')
+                    ? namedArgs['onPlatformViewCreated']
+                    : null,
             hitTestBehavior: namedArgs.containsKey('hitTestBehavior')
                 ? namedArgs['hitTestBehavior']
                 : PlatformViewHitTestBehavior.opaque,
-            layoutDirection: namedArgs.containsKey('layoutDirection') ? namedArgs['layoutDirection'] : null,
-            gestureRecognizers: namedArgs.containsKey('gestureRecognizers') ? namedArgs['gestureRecognizers'] : null,
-            creationParams: namedArgs.containsKey('creationParams') ? namedArgs['creationParams'] : null,
-            creationParamsCodec: namedArgs.containsKey('creationParamsCodec') ? namedArgs['creationParamsCodec'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            layoutDirection: namedArgs.containsKey('layoutDirection')
+                ? namedArgs['layoutDirection']
+                : null,
+            gestureRecognizers: namedArgs.containsKey('gestureRecognizers')
+                ? namedArgs['gestureRecognizers']
+                : null,
+            creationParams: namedArgs.containsKey('creationParams')
+                ? namedArgs['creationParams']
+                : null,
+            creationParamsCodec: namedArgs.containsKey('creationParamsCodec')
+                ? namedArgs['creationParamsCodec']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -46,7 +58,7 @@ extension AndroidViewBinding on AndroidView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AndroidView');
+        return const HTType('AndroidView');
       case 'viewType':
         return viewType;
       case 'onPlatformViewCreated':
@@ -74,25 +86,37 @@ extension AndroidViewBinding on AndroidView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -108,16 +132,26 @@ class UiKitViewAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             viewType: namedArgs['viewType'],
             onPlatformViewCreated:
-                namedArgs.containsKey('onPlatformViewCreated') ? namedArgs['onPlatformViewCreated'] : null,
+                namedArgs.containsKey('onPlatformViewCreated')
+                    ? namedArgs['onPlatformViewCreated']
+                    : null,
             hitTestBehavior: namedArgs.containsKey('hitTestBehavior')
                 ? namedArgs['hitTestBehavior']
                 : PlatformViewHitTestBehavior.opaque,
-            layoutDirection: namedArgs.containsKey('layoutDirection') ? namedArgs['layoutDirection'] : null,
-            creationParams: namedArgs.containsKey('creationParams') ? namedArgs['creationParams'] : null,
-            creationParamsCodec: namedArgs.containsKey('creationParamsCodec') ? namedArgs['creationParamsCodec'] : null,
-            gestureRecognizers: namedArgs.containsKey('gestureRecognizers') ? namedArgs['gestureRecognizers'] : null);
+            layoutDirection: namedArgs.containsKey('layoutDirection')
+                ? namedArgs['layoutDirection']
+                : null,
+            creationParams: namedArgs.containsKey('creationParams')
+                ? namedArgs['creationParams']
+                : null,
+            creationParamsCodec: namedArgs.containsKey('creationParamsCodec')
+                ? namedArgs['creationParamsCodec']
+                : null,
+            gestureRecognizers: namedArgs.containsKey('gestureRecognizers')
+                ? namedArgs['gestureRecognizers']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -138,7 +172,7 @@ extension UiKitViewBinding on UiKitView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UiKitView');
+        return const HTType('UiKitView');
       case 'viewType':
         return viewType;
       case 'onPlatformViewCreated':
@@ -164,25 +198,37 @@ extension UiKitViewBinding on UiKitView {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -195,9 +241,10 @@ class HtmlElementViewAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'HtmlElementView':
         return ({positionalArgs, namedArgs, typeArgs}) => HtmlElementView(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null, viewType: namedArgs['viewType']);
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            viewType: namedArgs['viewType']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -211,7 +258,7 @@ extension HtmlElementViewBinding on HtmlElementView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HtmlElementView');
+        return const HTType('HtmlElementView');
       case 'viewType':
         return viewType;
       case 'key':
@@ -219,31 +266,44 @@ extension HtmlElementViewBinding on HtmlElementView {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -261,7 +321,7 @@ class PlatformViewLinkAutoBinding extends HTExternalClass {
             onCreatePlatformView: namedArgs['onCreatePlatformView'],
             viewType: namedArgs['viewType']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -273,9 +333,12 @@ class PlatformViewLinkAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'PlatformViewSurfaceFactory': (HTFunction function) =>
-          (context, controller) => function.call(positionalArgs: [context, controller], namedArgs: const {}) as Widget,
-      'CreatePlatformViewCallback': (HTFunction function) =>
-          (params) => function.call(positionalArgs: [params], namedArgs: const {}) as PlatformViewController,
+          (context, controller) => function.call(
+              positionalArgs: [context, controller],
+              namedArgs: const {}) as Widget,
+      'CreatePlatformViewCallback': (HTFunction function) => (params) =>
+          function.call(positionalArgs: [params], namedArgs: const {})
+              as PlatformViewController,
     };
   }
 }
@@ -284,7 +347,7 @@ extension PlatformViewLinkBinding on PlatformViewLink {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformViewLink');
+        return const HTType('PlatformViewLink');
       case 'viewType':
         return viewType;
       case 'key':
@@ -298,25 +361,37 @@ extension PlatformViewLinkBinding on PlatformViewLink {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -334,7 +409,7 @@ class PlatformViewSurfaceAutoBinding extends HTExternalClass {
             hitTestBehavior: namedArgs['hitTestBehavior'],
             gestureRecognizers: namedArgs['gestureRecognizers']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -348,7 +423,7 @@ extension PlatformViewSurfaceBinding on PlatformViewSurface {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformViewSurface');
+        return const HTType('PlatformViewSurface');
       case 'controller':
         return controller;
       case 'gestureRecognizers':
@@ -360,33 +435,47 @@ extension PlatformViewSurfaceBinding on PlatformViewSurface {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -404,7 +493,7 @@ class AndroidViewSurfaceAutoBinding extends HTExternalClass {
             hitTestBehavior: namedArgs['hitTestBehavior'],
             gestureRecognizers: namedArgs['gestureRecognizers']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -418,7 +507,7 @@ extension AndroidViewSurfaceBinding on AndroidViewSurface {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AndroidViewSurface');
+        return const HTType('AndroidViewSurface');
       case 'controller':
         return controller;
       case 'gestureRecognizers':
@@ -430,33 +519,47 @@ extension AndroidViewSurfaceBinding on AndroidViewSurface {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/preferred_size.g.dart b/lib/bindings/flutter/widgets/preferred_size.g.dart
index a096199..a1c9e14 100644
--- a/lib/bindings/flutter/widgets/preferred_size.g.dart
+++ b/lib/bindings/flutter/widgets/preferred_size.g.dart
@@ -14,7 +14,7 @@ class PreferredSizeAutoBinding extends HTExternalClass {
             child: namedArgs['child'],
             preferredSize: namedArgs['preferredSize']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +28,7 @@ extension PreferredSizeBinding on PreferredSize {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PreferredSize');
+        return const HTType('PreferredSize');
       case 'child':
         return child;
       case 'preferredSize':
@@ -38,31 +38,44 @@ extension PreferredSizeBinding on PreferredSize {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/primary_scroll_controller.g.dart b/lib/bindings/flutter/widgets/primary_scroll_controller.g.dart
index b3dfdb8..3198d29 100644
--- a/lib/bindings/flutter/widgets/primary_scroll_controller.g.dart
+++ b/lib/bindings/flutter/widgets/primary_scroll_controller.g.dart
@@ -9,17 +9,21 @@ class PrimaryScrollControllerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PrimaryScrollController':
-        return ({positionalArgs, namedArgs, typeArgs}) => PrimaryScrollController(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            controller: namedArgs['controller'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PrimaryScrollController(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                controller: namedArgs['controller'],
+                child: namedArgs['child']);
       case 'PrimaryScrollController.none':
-        return ({positionalArgs, namedArgs, typeArgs}) => PrimaryScrollController.none(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null, child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PrimaryScrollController.none(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child']);
       case 'PrimaryScrollController.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => PrimaryScrollController.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PrimaryScrollController.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -33,7 +37,7 @@ extension PrimaryScrollControllerBinding on PrimaryScrollController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PrimaryScrollController');
+        return const HTType('PrimaryScrollController');
       case 'controller':
         return controller;
       case 'child':
@@ -43,31 +47,44 @@ extension PrimaryScrollControllerBinding on PrimaryScrollController {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/raw_keyboard_listener.g.dart b/lib/bindings/flutter/widgets/raw_keyboard_listener.g.dart
index cd0f1e9..b4df11e 100644
--- a/lib/bindings/flutter/widgets/raw_keyboard_listener.g.dart
+++ b/lib/bindings/flutter/widgets/raw_keyboard_listener.g.dart
@@ -12,12 +12,16 @@ class RawKeyboardListenerAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RawKeyboardListener(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             focusNode: namedArgs['focusNode'],
-            autofocus: namedArgs.containsKey('autofocus') ? namedArgs['autofocus'] : false,
-            includeSemantics: namedArgs.containsKey('includeSemantics') ? namedArgs['includeSemantics'] : true,
+            autofocus: namedArgs.containsKey('autofocus')
+                ? namedArgs['autofocus']
+                : false,
+            includeSemantics: namedArgs.containsKey('includeSemantics')
+                ? namedArgs['includeSemantics']
+                : true,
             onKey: namedArgs.containsKey('onKey') ? namedArgs['onKey'] : null,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +35,7 @@ extension RawKeyboardListenerBinding on RawKeyboardListener {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawKeyboardListener');
+        return const HTType('RawKeyboardListener');
       case 'focusNode':
         return focusNode;
       case 'autofocus':
@@ -49,29 +53,41 @@ extension RawKeyboardListenerBinding on RawKeyboardListener {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/reorderable_list.g.dart b/lib/bindings/flutter/widgets/reorderable_list.g.dart
index 7e7f531..da93e1d 100644
--- a/lib/bindings/flutter/widgets/reorderable_list.g.dart
+++ b/lib/bindings/flutter/widgets/reorderable_list.g.dart
@@ -15,29 +15,51 @@ class ReorderableListAutoBinding extends HTExternalClass {
             itemBuilder: namedArgs['itemBuilder'],
             itemCount: namedArgs['itemCount'],
             onReorder: namedArgs['onReorder'],
-            proxyDecorator: namedArgs.containsKey('proxyDecorator') ? namedArgs['proxyDecorator'] : null,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
+            proxyDecorator: namedArgs.containsKey('proxyDecorator')
+                ? namedArgs['proxyDecorator']
+                : null,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
             anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'ReorderableList.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReorderableList.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReorderableList.of(positionalArgs[0]);
       case 'ReorderableList.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReorderableList.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReorderableList.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -48,12 +70,16 @@ class ReorderableListAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'IndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget,
-      'ReorderCallback': (HTFunction function) =>
-          (oldIndex, newIndex) => function.call(positionalArgs: [oldIndex, newIndex], namedArgs: const {}),
-      'ReorderItemProxyDecorator': (HTFunction function) => (child, index, animation) =>
-          function.call(positionalArgs: [child, index, animation], namedArgs: const {}) as Widget,
+      'IndexedWidgetBuilder': (HTFunction function) => (context, index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget,
+      'ReorderCallback': (HTFunction function) => (oldIndex, newIndex) =>
+          function
+              .call(positionalArgs: [oldIndex, newIndex], namedArgs: const {}),
+      'ReorderItemProxyDecorator': (HTFunction function) =>
+          (child, index, animation) => function.call(
+              positionalArgs: [child, index, animation],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -62,7 +88,7 @@ extension ReorderableListBinding on ReorderableList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReorderableList');
+        return const HTType('ReorderableList');
       case 'itemBuilder':
         return itemBuilder;
       case 'itemCount':
@@ -108,25 +134,37 @@ extension ReorderableListBinding on ReorderableList {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -138,9 +176,10 @@ class ReorderableListStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ReorderableListState':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReorderableListState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReorderableListState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -154,7 +193,7 @@ extension ReorderableListStateBinding on ReorderableListState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReorderableListState');
+        return const HTType('ReorderableListState');
       case 'widget':
         return widget;
       case 'context':
@@ -165,24 +204,30 @@ extension ReorderableListStateBinding on ReorderableListState {
         return ({positionalArgs, namedArgs, typeArgs}) => startItemDragReorder(
             index: namedArgs.containsKey('index') ? namedArgs['index'] : null,
             event: namedArgs.containsKey('event') ? namedArgs['event'] : null,
-            recognizer: namedArgs.containsKey('recognizer') ? namedArgs['recognizer'] : null);
+            recognizer: namedArgs.containsKey('recognizer')
+                ? namedArgs['recognizer']
+                : null);
       case 'cancelReorder':
         return ({positionalArgs, namedArgs, typeArgs}) => cancelReorder();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -199,13 +244,17 @@ class SliverReorderableListAutoBinding extends HTExternalClass {
             itemBuilder: namedArgs['itemBuilder'],
             itemCount: namedArgs['itemCount'],
             onReorder: namedArgs['onReorder'],
-            proxyDecorator: namedArgs.containsKey('proxyDecorator') ? namedArgs['proxyDecorator'] : null);
+            proxyDecorator: namedArgs.containsKey('proxyDecorator')
+                ? namedArgs['proxyDecorator']
+                : null);
       case 'SliverReorderableList.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverReorderableList.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverReorderableList.of(positionalArgs[0]);
       case 'SliverReorderableList.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverReorderableList.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverReorderableList.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -216,12 +265,16 @@ class SliverReorderableListAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'IndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget,
-      'ReorderCallback': (HTFunction function) =>
-          (oldIndex, newIndex) => function.call(positionalArgs: [oldIndex, newIndex], namedArgs: const {}),
-      'ReorderItemProxyDecorator': (HTFunction function) => (child, index, animation) =>
-          function.call(positionalArgs: [child, index, animation], namedArgs: const {}) as Widget,
+      'IndexedWidgetBuilder': (HTFunction function) => (context, index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget,
+      'ReorderCallback': (HTFunction function) => (oldIndex, newIndex) =>
+          function
+              .call(positionalArgs: [oldIndex, newIndex], namedArgs: const {}),
+      'ReorderItemProxyDecorator': (HTFunction function) =>
+          (child, index, animation) => function.call(
+              positionalArgs: [child, index, animation],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -230,7 +283,7 @@ extension SliverReorderableListBinding on SliverReorderableList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverReorderableList');
+        return const HTType('SliverReorderableList');
       case 'itemBuilder':
         return itemBuilder;
       case 'itemCount':
@@ -250,25 +303,37 @@ extension SliverReorderableListBinding on SliverReorderableList {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -280,9 +345,10 @@ class SliverReorderableListStateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverReorderableListState':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverReorderableListState();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverReorderableListState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -293,8 +359,8 @@ class SliverReorderableListStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -303,7 +369,7 @@ extension SliverReorderableListStateBinding on SliverReorderableListState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverReorderableListState');
+        return const HTType('SliverReorderableListState');
       case 'widget':
         return widget;
       case 'context':
@@ -311,52 +377,63 @@ extension SliverReorderableListStateBinding on SliverReorderableListState {
       case 'mounted':
         return mounted;
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'startItemDragReorder':
         return ({positionalArgs, namedArgs, typeArgs}) => startItemDragReorder(
             index: namedArgs.containsKey('index') ? namedArgs['index'] : null,
             event: namedArgs.containsKey('event') ? namedArgs['event'] : null,
-            recognizer: namedArgs.containsKey('recognizer') ? namedArgs['recognizer'] : null);
+            recognizer: namedArgs.containsKey('recognizer')
+                ? namedArgs['recognizer']
+                : null);
       case 'cancelReorder':
         return ({positionalArgs, namedArgs, typeArgs}) => cancelReorder();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class ReorderableDragStartListenerAutoBinding extends HTExternalClass {
-  ReorderableDragStartListenerAutoBinding() : super('ReorderableDragStartListener');
+  ReorderableDragStartListenerAutoBinding()
+      : super('ReorderableDragStartListener');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ReorderableDragStartListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReorderableDragStartListener(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            index: namedArgs['index']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReorderableDragStartListener(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                index: namedArgs['index']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -370,7 +447,7 @@ extension ReorderableDragStartListenerBinding on ReorderableDragStartListener {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReorderableDragStartListener');
+        return const HTType('ReorderableDragStartListener');
       case 'child':
         return child;
       case 'index':
@@ -380,48 +457,63 @@ extension ReorderableDragStartListenerBinding on ReorderableDragStartListener {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class ReorderableDelayedDragStartListenerAutoBinding extends HTExternalClass {
-  ReorderableDelayedDragStartListenerAutoBinding() : super('ReorderableDelayedDragStartListener');
+  ReorderableDelayedDragStartListenerAutoBinding()
+      : super('ReorderableDelayedDragStartListener');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ReorderableDelayedDragStartListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => ReorderableDelayedDragStartListener(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs['child'],
-            index: namedArgs['index']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ReorderableDelayedDragStartListener(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child: namedArgs['child'],
+                index: namedArgs['index']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -431,11 +523,12 @@ class ReorderableDelayedDragStartListenerAutoBinding extends HTExternalClass {
   }
 }
 
-extension ReorderableDelayedDragStartListenerBinding on ReorderableDelayedDragStartListener {
+extension ReorderableDelayedDragStartListenerBinding
+    on ReorderableDelayedDragStartListener {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ReorderableDelayedDragStartListener');
+        return const HTType('ReorderableDelayedDragStartListener');
       case 'child':
         return child;
       case 'index':
@@ -447,31 +540,44 @@ extension ReorderableDelayedDragStartListenerBinding on ReorderableDelayedDragSt
       case 'createRecognizer':
         return ({positionalArgs, namedArgs, typeArgs}) => createRecognizer();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/restoration.g.dart b/lib/bindings/flutter/widgets/restoration.g.dart
index e63d961..45bb05f 100644
--- a/lib/bindings/flutter/widgets/restoration.g.dart
+++ b/lib/bindings/flutter/widgets/restoration.g.dart
@@ -15,9 +15,10 @@ class RestorationScopeAutoBinding extends HTExternalClass {
             restorationId: namedArgs['restorationId'],
             child: namedArgs['child']);
       case 'RestorationScope.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorationScope.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorationScope.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +32,7 @@ extension RestorationScopeBinding on RestorationScope {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorationScope');
+        return const HTType('RestorationScope');
       case 'child':
         return child;
       case 'restorationId':
@@ -47,25 +48,37 @@ extension RestorationScopeBinding on RestorationScope {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -77,12 +90,15 @@ class UnmanagedRestorationScopeAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'UnmanagedRestorationScope':
-        return ({positionalArgs, namedArgs, typeArgs}) => UnmanagedRestorationScope(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            bucket: namedArgs.containsKey('bucket') ? namedArgs['bucket'] : null,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            UnmanagedRestorationScope(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                bucket: namedArgs.containsKey('bucket')
+                    ? namedArgs['bucket']
+                    : null,
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -96,7 +112,7 @@ extension UnmanagedRestorationScopeBinding on UnmanagedRestorationScope {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UnmanagedRestorationScope');
+        return const HTType('UnmanagedRestorationScope');
       case 'bucket':
         return bucket;
       case 'child':
@@ -106,31 +122,44 @@ extension UnmanagedRestorationScopeBinding on UnmanagedRestorationScope {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -147,7 +176,7 @@ class RootRestorationScopeAutoBinding extends HTExternalClass {
             restorationId: namedArgs['restorationId'],
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -161,7 +190,7 @@ extension RootRestorationScopeBinding on RootRestorationScope {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RootRestorationScope');
+        return const HTType('RootRestorationScope');
       case 'child':
         return child;
       case 'restorationId':
@@ -177,25 +206,37 @@ extension RootRestorationScopeBinding on RootRestorationScope {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/restoration_properties.g.dart b/lib/bindings/flutter/widgets/restoration_properties.g.dart
index f541c13..74cbc36 100644
--- a/lib/bindings/flutter/widgets/restoration_properties.g.dart
+++ b/lib/bindings/flutter/widgets/restoration_properties.g.dart
@@ -8,9 +8,10 @@ class RestorableDoubleAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableDouble':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableDouble(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableDouble(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +27,8 @@ class RestorableDoubleAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -35,27 +37,32 @@ extension RestorableDoubleBinding on RestorableDouble {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableDouble');
+        return const HTType('RestorableDouble');
       case 'enabled':
         return enabled;
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -65,7 +72,7 @@ extension RestorableDoubleBinding on RestorableDouble {
         value = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -77,9 +84,10 @@ class RestorableIntAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableInt':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableInt(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableInt(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -95,7 +103,8 @@ class RestorableIntAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -104,27 +113,32 @@ extension RestorableIntBinding on RestorableInt {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableInt');
+        return const HTType('RestorableInt');
       case 'enabled':
         return enabled;
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -134,7 +148,7 @@ extension RestorableIntBinding on RestorableInt {
         value = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -146,9 +160,10 @@ class RestorableStringAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableString':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableString(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableString(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -164,7 +179,8 @@ class RestorableStringAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -173,27 +189,32 @@ extension RestorableStringBinding on RestorableString {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableString');
+        return const HTType('RestorableString');
       case 'enabled':
         return enabled;
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -203,7 +224,7 @@ extension RestorableStringBinding on RestorableString {
         value = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -215,9 +236,10 @@ class RestorableBoolAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableBool':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableBool(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableBool(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -233,7 +255,8 @@ class RestorableBoolAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -242,27 +265,32 @@ extension RestorableBoolBinding on RestorableBool {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableBool');
+        return const HTType('RestorableBool');
       case 'enabled':
         return enabled;
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -272,7 +300,7 @@ extension RestorableBoolBinding on RestorableBool {
         value = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -284,9 +312,10 @@ class RestorableBoolNAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableBoolN':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableBoolN(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableBoolN(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -297,7 +326,8 @@ class RestorableBoolNAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -306,7 +336,7 @@ extension RestorableBoolNBinding on RestorableBoolN {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableBoolN');
+        return const HTType('RestorableBoolN');
       case 'value':
         return value;
       case 'enabled':
@@ -314,21 +344,26 @@ extension RestorableBoolNBinding on RestorableBoolN {
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -340,9 +375,10 @@ class RestorableDoubleNAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableDoubleN':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableDoubleN(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableDoubleN(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -353,7 +389,8 @@ class RestorableDoubleNAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -362,7 +399,7 @@ extension RestorableDoubleNBinding on RestorableDoubleN {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableDoubleN');
+        return const HTType('RestorableDoubleN');
       case 'value':
         return value;
       case 'enabled':
@@ -370,21 +407,26 @@ extension RestorableDoubleNBinding on RestorableDoubleN {
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -396,9 +438,10 @@ class RestorableIntNAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableIntN':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableIntN(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableIntN(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -409,7 +452,8 @@ class RestorableIntNAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -418,7 +462,7 @@ extension RestorableIntNBinding on RestorableIntN {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableIntN');
+        return const HTType('RestorableIntN');
       case 'value':
         return value;
       case 'enabled':
@@ -426,21 +470,26 @@ extension RestorableIntNBinding on RestorableIntN {
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -452,9 +501,10 @@ class RestorableStringNAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableStringN':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableStringN(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableStringN(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -465,7 +515,8 @@ class RestorableStringNAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -474,7 +525,7 @@ extension RestorableStringNBinding on RestorableStringN {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableStringN');
+        return const HTType('RestorableStringN');
       case 'value':
         return value;
       case 'enabled':
@@ -482,38 +533,46 @@ extension RestorableStringNBinding on RestorableStringN {
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'didUpdateValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateValue(positionalArgs[0]);
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RestorableTextEditingControllerAutoBinding extends HTExternalClass {
-  RestorableTextEditingControllerAutoBinding() : super('RestorableTextEditingController');
+  RestorableTextEditingControllerAutoBinding()
+      : super('RestorableTextEditingController');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RestorableTextEditingController':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RestorableTextEditingController(text: namedArgs.containsKey('text') ? namedArgs['text'] : null);
+            RestorableTextEditingController(
+                text: namedArgs.containsKey('text') ? namedArgs['text'] : null);
       case 'RestorableTextEditingController.fromValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => RestorableTextEditingController.fromValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RestorableTextEditingController.fromValue(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -524,16 +583,18 @@ class RestorableTextEditingControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension RestorableTextEditingControllerBinding on RestorableTextEditingController {
+extension RestorableTextEditingControllerBinding
+    on RestorableTextEditingController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RestorableTextEditingController');
+        return const HTType('RestorableTextEditingController');
       case 'value':
         return value;
       case 'enabled':
@@ -541,19 +602,23 @@ extension RestorableTextEditingControllerBinding on RestorableTextEditingControl
       case 'createDefaultValue':
         return ({positionalArgs, namedArgs, typeArgs}) => createDefaultValue();
       case 'fromPrimitives':
-        return ({positionalArgs, namedArgs, typeArgs}) => fromPrimitives(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            fromPrimitives(positionalArgs[0]);
       case 'toPrimitives':
         return ({positionalArgs, namedArgs, typeArgs}) => toPrimitives();
       case 'initWithValue':
-        return ({positionalArgs, namedArgs, typeArgs}) => initWithValue(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            initWithValue(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/router.g.dart b/lib/bindings/flutter/widgets/router.g.dart
index b8656ba..89d5504 100644
--- a/lib/bindings/flutter/widgets/router.g.dart
+++ b/lib/bindings/flutter/widgets/router.g.dart
@@ -9,10 +9,12 @@ class RouteInformationAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'RouteInformation':
         return ({positionalArgs, namedArgs, typeArgs}) => RouteInformation(
-            location: namedArgs.containsKey('location') ? namedArgs['location'] : null,
+            location: namedArgs.containsKey('location')
+                ? namedArgs['location']
+                : null,
             state: namedArgs.containsKey('state') ? namedArgs['state'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,13 +28,13 @@ extension RouteInformationBinding on RouteInformation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RouteInformation');
+        return const HTType('RouteInformation');
       case 'location':
         return location;
       case 'state':
         return state;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,9 +46,10 @@ class RootBackButtonDispatcherAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RootBackButtonDispatcher':
-        return ({positionalArgs, namedArgs, typeArgs}) => RootBackButtonDispatcher();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RootBackButtonDispatcher();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -60,27 +63,33 @@ extension RootBackButtonDispatcherBinding on RootBackButtonDispatcher {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RootBackButtonDispatcher');
+        return const HTType('RootBackButtonDispatcher');
       case 'hasCallbacks':
         return hasCallbacks;
       case 'addCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addCallback(positionalArgs[0]);
       case 'removeCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeCallback(positionalArgs[0]);
       case 'didPopRoute':
         return ({positionalArgs, namedArgs, typeArgs}) => didPopRoute();
       case 'invokeCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => invokeCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invokeCallback(positionalArgs[0]);
       case 'createChildBackButtonDispatcher':
-        return ({positionalArgs, namedArgs, typeArgs}) => createChildBackButtonDispatcher();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createChildBackButtonDispatcher();
       case 'takePriority':
         return ({positionalArgs, namedArgs, typeArgs}) => takePriority();
       case 'deferTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => deferTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deferTo(positionalArgs[0]);
       case 'forget':
-        return ({positionalArgs, namedArgs, typeArgs}) => forget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forget(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -92,9 +101,10 @@ class ChildBackButtonDispatcherAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ChildBackButtonDispatcher':
-        return ({positionalArgs, namedArgs, typeArgs}) => ChildBackButtonDispatcher(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ChildBackButtonDispatcher(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -108,7 +118,7 @@ extension ChildBackButtonDispatcherBinding on ChildBackButtonDispatcher {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ChildBackButtonDispatcher');
+        return const HTType('ChildBackButtonDispatcher');
       case 'parent':
         return parent;
       case 'hasCallbacks':
@@ -116,35 +126,45 @@ extension ChildBackButtonDispatcherBinding on ChildBackButtonDispatcher {
       case 'takePriority':
         return ({positionalArgs, namedArgs, typeArgs}) => takePriority();
       case 'deferTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => deferTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            deferTo(positionalArgs[0]);
       case 'removeCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeCallback(positionalArgs[0]);
       case 'invokeCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => invokeCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invokeCallback(positionalArgs[0]);
       case 'createChildBackButtonDispatcher':
-        return ({positionalArgs, namedArgs, typeArgs}) => createChildBackButtonDispatcher();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createChildBackButtonDispatcher();
       case 'forget':
-        return ({positionalArgs, namedArgs, typeArgs}) => forget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forget(positionalArgs[0]);
       case 'addCallback':
-        return ({positionalArgs, namedArgs, typeArgs}) => addCallback(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addCallback(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class PlatformRouteInformationProviderAutoBinding extends HTExternalClass {
-  PlatformRouteInformationProviderAutoBinding() : super('PlatformRouteInformationProvider');
+  PlatformRouteInformationProviderAutoBinding()
+      : super('PlatformRouteInformationProvider');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'PlatformRouteInformationProvider':
-        return ({positionalArgs, namedArgs, typeArgs}) => PlatformRouteInformationProvider(
-            initialRouteInformation:
-                namedArgs.containsKey('initialRouteInformation') ? namedArgs['initialRouteInformation'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            PlatformRouteInformationProvider(
+                initialRouteInformation:
+                    namedArgs.containsKey('initialRouteInformation')
+                        ? namedArgs['initialRouteInformation']
+                        : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -155,32 +175,39 @@ class PlatformRouteInformationProviderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension PlatformRouteInformationProviderBinding on PlatformRouteInformationProvider {
+extension PlatformRouteInformationProviderBinding
+    on PlatformRouteInformationProvider {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PlatformRouteInformationProvider');
+        return const HTType('PlatformRouteInformationProvider');
       case 'value':
         return value;
       case 'routerReportsNewRouteInformation':
-        return ({positionalArgs, namedArgs, typeArgs}) => routerReportsNewRouteInformation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            routerReportsNewRouteInformation(positionalArgs[0]);
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'didPushRouteInformation':
-        return ({positionalArgs, namedArgs, typeArgs}) => didPushRouteInformation(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didPushRouteInformation(positionalArgs[0]);
       case 'didPushRoute':
-        return ({positionalArgs, namedArgs, typeArgs}) => didPushRoute(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didPushRoute(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/routes.g.dart b/lib/bindings/flutter/widgets/routes.g.dart
index f3a18da..1e1c2db 100644
--- a/lib/bindings/flutter/widgets/routes.g.dart
+++ b/lib/bindings/flutter/widgets/routes.g.dart
@@ -8,10 +8,12 @@ class LocalHistoryEntryAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'LocalHistoryEntry':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            LocalHistoryEntry(onRemove: namedArgs.containsKey('onRemove') ? namedArgs['onRemove'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => LocalHistoryEntry(
+            onRemove: namedArgs.containsKey('onRemove')
+                ? namedArgs['onRemove']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -22,7 +24,8 @@ class LocalHistoryEntryAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -31,13 +34,13 @@ extension LocalHistoryEntryBinding on LocalHistoryEntry {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LocalHistoryEntry');
+        return const HTType('LocalHistoryEntry');
       case 'onRemove':
         return onRemove;
       case 'remove':
         return ({positionalArgs, namedArgs, typeArgs}) => remove();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/safe_area.g.dart b/lib/bindings/flutter/widgets/safe_area.g.dart
index 1c15bd0..cd9cc65 100644
--- a/lib/bindings/flutter/widgets/safe_area.g.dart
+++ b/lib/bindings/flutter/widgets/safe_area.g.dart
@@ -14,13 +14,18 @@ class SafeAreaAutoBinding extends HTExternalClass {
             left: namedArgs.containsKey('left') ? namedArgs['left'] : true,
             top: namedArgs.containsKey('top') ? namedArgs['top'] : true,
             right: namedArgs.containsKey('right') ? namedArgs['right'] : true,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : true,
-            minimum: namedArgs.containsKey('minimum') ? namedArgs['minimum'] : EdgeInsets.zero,
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : true,
+            minimum: namedArgs.containsKey('minimum')
+                ? namedArgs['minimum']
+                : EdgeInsets.zero,
             maintainBottomViewPadding:
-                namedArgs.containsKey('maintainBottomViewPadding') ? namedArgs['maintainBottomViewPadding'] : false,
+                namedArgs.containsKey('maintainBottomViewPadding')
+                    ? namedArgs['maintainBottomViewPadding']
+                    : false,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -34,7 +39,7 @@ extension SafeAreaBinding on SafeArea {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SafeArea');
+        return const HTType('SafeArea');
       case 'left':
         return left;
       case 'top':
@@ -54,31 +59,44 @@ extension SafeAreaBinding on SafeArea {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -95,11 +113,14 @@ class SliverSafeAreaAutoBinding extends HTExternalClass {
             left: namedArgs.containsKey('left') ? namedArgs['left'] : true,
             top: namedArgs.containsKey('top') ? namedArgs['top'] : true,
             right: namedArgs.containsKey('right') ? namedArgs['right'] : true,
-            bottom: namedArgs.containsKey('bottom') ? namedArgs['bottom'] : true,
-            minimum: namedArgs.containsKey('minimum') ? namedArgs['minimum'] : EdgeInsets.zero,
+            bottom:
+                namedArgs.containsKey('bottom') ? namedArgs['bottom'] : true,
+            minimum: namedArgs.containsKey('minimum')
+                ? namedArgs['minimum']
+                : EdgeInsets.zero,
             sliver: namedArgs['sliver']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -113,7 +134,7 @@ extension SliverSafeAreaBinding on SliverSafeArea {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverSafeArea');
+        return const HTType('SliverSafeArea');
       case 'left':
         return left;
       case 'top':
@@ -131,31 +152,44 @@ extension SliverSafeAreaBinding on SliverSafeArea {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_activity.g.dart b/lib/bindings/flutter/widgets/scroll_activity.g.dart
index 099ee1a..db26d7f 100644
--- a/lib/bindings/flutter/widgets/scroll_activity.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_activity.g.dart
@@ -8,9 +8,10 @@ class IdleScrollActivityAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'IdleScrollActivity':
-        return ({positionalArgs, namedArgs, typeArgs}) => IdleScrollActivity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            IdleScrollActivity(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +25,7 @@ extension IdleScrollActivityBinding on IdleScrollActivity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('IdleScrollActivity');
+        return const HTType('IdleScrollActivity');
       case 'shouldIgnorePointer':
         return shouldIgnorePointer;
       case 'isScrolling':
@@ -36,18 +37,22 @@ extension IdleScrollActivityBinding on IdleScrollActivity {
       case 'applyNewDimensions':
         return ({positionalArgs, namedArgs, typeArgs}) => applyNewDimensions();
       case 'updateDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateDelegate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateDelegate(positionalArgs[0]);
       case 'resetActivity':
         return ({positionalArgs, namedArgs, typeArgs}) => resetActivity();
       case 'dispatchScrollStartNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollStartNotification(positionalArgs[0], positionalArgs[1]);
+            dispatchScrollStartNotification(
+                positionalArgs[0], positionalArgs[1]);
       case 'dispatchScrollUpdateNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollUpdateNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchScrollUpdateNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchOverscrollNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchOverscrollNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchOverscrollNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchScrollEndNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             dispatchScrollEndNotification(positionalArgs[0], positionalArgs[1]);
@@ -56,7 +61,7 @@ extension IdleScrollActivityBinding on IdleScrollActivity {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -70,9 +75,11 @@ class HoldScrollActivityAutoBinding extends HTExternalClass {
       case 'HoldScrollActivity':
         return ({positionalArgs, namedArgs, typeArgs}) => HoldScrollActivity(
             delegate: namedArgs['delegate'],
-            onHoldCanceled: namedArgs.containsKey('onHoldCanceled') ? namedArgs['onHoldCanceled'] : null);
+            onHoldCanceled: namedArgs.containsKey('onHoldCanceled')
+                ? namedArgs['onHoldCanceled']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -83,7 +90,8 @@ class HoldScrollActivityAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -92,7 +100,7 @@ extension HoldScrollActivityBinding on HoldScrollActivity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('HoldScrollActivity');
+        return const HTType('HoldScrollActivity');
       case 'onHoldCanceled':
         return onHoldCanceled;
       case 'shouldIgnorePointer':
@@ -108,18 +116,22 @@ extension HoldScrollActivityBinding on HoldScrollActivity {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'updateDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateDelegate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateDelegate(positionalArgs[0]);
       case 'resetActivity':
         return ({positionalArgs, namedArgs, typeArgs}) => resetActivity();
       case 'dispatchScrollStartNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollStartNotification(positionalArgs[0], positionalArgs[1]);
+            dispatchScrollStartNotification(
+                positionalArgs[0], positionalArgs[1]);
       case 'dispatchScrollUpdateNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollUpdateNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchScrollUpdateNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchOverscrollNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchOverscrollNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchOverscrollNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchScrollEndNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             dispatchScrollEndNotification(positionalArgs[0], positionalArgs[1]);
@@ -128,7 +140,7 @@ extension HoldScrollActivityBinding on HoldScrollActivity {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -143,17 +155,22 @@ class ScrollDragControllerAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollDragController(
             delegate: namedArgs['delegate'],
             details: namedArgs['details'],
-            onDragCanceled: namedArgs.containsKey('onDragCanceled') ? namedArgs['onDragCanceled'] : null,
-            carriedVelocity: namedArgs.containsKey('carriedVelocity') ? namedArgs['carriedVelocity'] : null,
-            motionStartDistanceThreshold: namedArgs.containsKey('motionStartDistanceThreshold')
-                ? namedArgs['motionStartDistanceThreshold']
-                : null);
+            onDragCanceled: namedArgs.containsKey('onDragCanceled')
+                ? namedArgs['onDragCanceled']
+                : null,
+            carriedVelocity: namedArgs.containsKey('carriedVelocity')
+                ? namedArgs['carriedVelocity']
+                : null,
+            motionStartDistanceThreshold:
+                namedArgs.containsKey('motionStartDistanceThreshold')
+                    ? namedArgs['motionStartDistanceThreshold']
+                    : null);
       case 'ScrollDragController.momentumRetainStationaryDurationThreshold':
         return ScrollDragController.momentumRetainStationaryDurationThreshold;
       case 'ScrollDragController.motionStoppedDurationThreshold':
         return ScrollDragController.motionStoppedDurationThreshold;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -164,7 +181,8 @@ class ScrollDragControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -173,7 +191,7 @@ extension ScrollDragControllerBinding on ScrollDragController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollDragController');
+        return const HTType('ScrollDragController');
       case 'onDragCanceled':
         return onDragCanceled;
       case 'carriedVelocity':
@@ -185,11 +203,14 @@ extension ScrollDragControllerBinding on ScrollDragController {
       case 'lastDetails':
         return lastDetails;
       case 'updateDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateDelegate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateDelegate(positionalArgs[0]);
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'end':
-        return ({positionalArgs, namedArgs, typeArgs}) => end(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            end(positionalArgs[0]);
       case 'cancel':
         return ({positionalArgs, namedArgs, typeArgs}) => cancel();
       case 'dispose':
@@ -197,7 +218,7 @@ extension ScrollDragControllerBinding on ScrollDragController {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -209,9 +230,10 @@ class DragScrollActivityAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DragScrollActivity':
-        return ({positionalArgs, namedArgs, typeArgs}) => DragScrollActivity(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DragScrollActivity(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -225,7 +247,7 @@ extension DragScrollActivityBinding on DragScrollActivity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DragScrollActivity');
+        return const HTType('DragScrollActivity');
       case 'shouldIgnorePointer':
         return shouldIgnorePointer;
       case 'isScrolling':
@@ -236,13 +258,16 @@ extension DragScrollActivityBinding on DragScrollActivity {
         return delegate;
       case 'dispatchScrollStartNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollStartNotification(positionalArgs[0], positionalArgs[1]);
+            dispatchScrollStartNotification(
+                positionalArgs[0], positionalArgs[1]);
       case 'dispatchScrollUpdateNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollUpdateNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchScrollUpdateNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchOverscrollNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchOverscrollNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchOverscrollNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchScrollEndNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             dispatchScrollEndNotification(positionalArgs[0], positionalArgs[1]);
@@ -251,13 +276,14 @@ extension DragScrollActivityBinding on DragScrollActivity {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'updateDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateDelegate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateDelegate(positionalArgs[0]);
       case 'resetActivity':
         return ({positionalArgs, namedArgs, typeArgs}) => resetActivity();
       case 'applyNewDimensions':
         return ({positionalArgs, namedArgs, typeArgs}) => applyNewDimensions();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -270,9 +296,10 @@ class BallisticScrollActivityAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'BallisticScrollActivity':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            BallisticScrollActivity(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            BallisticScrollActivity(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -286,7 +313,7 @@ extension BallisticScrollActivityBinding on BallisticScrollActivity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BallisticScrollActivity');
+        return const HTType('BallisticScrollActivity');
       case 'shouldIgnorePointer':
         return shouldIgnorePointer;
       case 'isScrolling':
@@ -301,24 +328,28 @@ extension BallisticScrollActivityBinding on BallisticScrollActivity {
         return ({positionalArgs, namedArgs, typeArgs}) => applyNewDimensions();
       case 'dispatchOverscrollNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchOverscrollNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchOverscrollNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'updateDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateDelegate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateDelegate(positionalArgs[0]);
       case 'dispatchScrollStartNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollStartNotification(positionalArgs[0], positionalArgs[1]);
+            dispatchScrollStartNotification(
+                positionalArgs[0], positionalArgs[1]);
       case 'dispatchScrollUpdateNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollUpdateNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchScrollUpdateNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchScrollEndNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             dispatchScrollEndNotification(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -330,14 +361,15 @@ class DrivenScrollActivityAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DrivenScrollActivity':
-        return ({positionalArgs, namedArgs, typeArgs}) => DrivenScrollActivity(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => DrivenScrollActivity(
+            positionalArgs[0],
             from: namedArgs['from'],
             to: namedArgs['to'],
             duration: namedArgs['duration'],
             curve: namedArgs['curve'],
             vsync: namedArgs['vsync']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -351,7 +383,7 @@ extension DrivenScrollActivityBinding on DrivenScrollActivity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DrivenScrollActivity');
+        return const HTType('DrivenScrollActivity');
       case 'done':
         return done;
       case 'shouldIgnorePointer':
@@ -364,28 +396,32 @@ extension DrivenScrollActivityBinding on DrivenScrollActivity {
         return delegate;
       case 'dispatchOverscrollNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchOverscrollNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchOverscrollNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'updateDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateDelegate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateDelegate(positionalArgs[0]);
       case 'resetActivity':
         return ({positionalArgs, namedArgs, typeArgs}) => resetActivity();
       case 'dispatchScrollStartNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollStartNotification(positionalArgs[0], positionalArgs[1]);
+            dispatchScrollStartNotification(
+                positionalArgs[0], positionalArgs[1]);
       case 'dispatchScrollUpdateNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dispatchScrollUpdateNotification(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            dispatchScrollUpdateNotification(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'dispatchScrollEndNotification':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             dispatchScrollEndNotification(positionalArgs[0], positionalArgs[1]);
       case 'applyNewDimensions':
         return ({positionalArgs, namedArgs, typeArgs}) => applyNewDimensions();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_configuration.g.dart b/lib/bindings/flutter/widgets/scroll_configuration.g.dart
index 8875d14..edc9777 100644
--- a/lib/bindings/flutter/widgets/scroll_configuration.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_configuration.g.dart
@@ -12,7 +12,7 @@ class ScrollBehaviorAutoBinding extends HTExternalClass {
       case 'ScrollBehavior':
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollBehavior();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,22 +26,26 @@ extension ScrollBehaviorBinding on ScrollBehavior {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollBehavior');
+        return const HTType('ScrollBehavior');
       case 'getPlatform':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPlatform(positionalArgs[0]);
-      case 'buildViewportChrome':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            buildViewportChrome(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            getPlatform(positionalArgs[0]);
+      case 'buildViewportChrome':
+        return ({positionalArgs, namedArgs, typeArgs}) => buildViewportChrome(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'velocityTrackerBuilder':
-        return ({positionalArgs, namedArgs, typeArgs}) => velocityTrackerBuilder(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            velocityTrackerBuilder(positionalArgs[0]);
       case 'getScrollPhysics':
-        return ({positionalArgs, namedArgs, typeArgs}) => getScrollPhysics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getScrollPhysics(positionalArgs[0]);
       case 'shouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldNotify(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -58,9 +62,10 @@ class ScrollConfigurationAutoBinding extends HTExternalClass {
             behavior: namedArgs['behavior'],
             child: namedArgs['child']);
       case 'ScrollConfiguration.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScrollConfiguration.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScrollConfiguration.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -74,7 +79,7 @@ extension ScrollConfigurationBinding on ScrollConfiguration {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollConfiguration');
+        return const HTType('ScrollConfiguration');
       case 'behavior':
         return behavior;
       case 'child':
@@ -84,31 +89,44 @@ extension ScrollConfigurationBinding on ScrollConfiguration {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_controller.g.dart b/lib/bindings/flutter/widgets/scroll_controller.g.dart
index 912a812..42578ed 100644
--- a/lib/bindings/flutter/widgets/scroll_controller.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_controller.g.dart
@@ -9,11 +9,17 @@ class ScrollControllerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ScrollController':
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollController(
-            initialScrollOffset: namedArgs.containsKey('initialScrollOffset') ? namedArgs['initialScrollOffset'] : 0.0,
-            keepScrollOffset: namedArgs.containsKey('keepScrollOffset') ? namedArgs['keepScrollOffset'] : true,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+            initialScrollOffset: namedArgs.containsKey('initialScrollOffset')
+                ? namedArgs['initialScrollOffset']
+                : 0.0,
+            keepScrollOffset: namedArgs.containsKey('keepScrollOffset')
+                ? namedArgs['keepScrollOffset']
+                : true,
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,7 +30,8 @@ class ScrollControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -33,7 +40,7 @@ extension ScrollControllerBinding on ScrollController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollController');
+        return const HTType('ScrollController');
       case 'keepScrollOffset':
         return keepScrollOffset;
       case 'debugLabel':
@@ -47,30 +54,39 @@ extension ScrollControllerBinding on ScrollController {
       case 'offset':
         return offset;
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'jumpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            jumpTo(positionalArgs[0]);
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
-        return ({positionalArgs, namedArgs, typeArgs}) => detach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            detach(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'createScrollPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createScrollPosition(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => createScrollPosition(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -82,12 +98,20 @@ class TrackingScrollControllerAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TrackingScrollController':
-        return ({positionalArgs, namedArgs, typeArgs}) => TrackingScrollController(
-            initialScrollOffset: namedArgs.containsKey('initialScrollOffset') ? namedArgs['initialScrollOffset'] : 0.0,
-            keepScrollOffset: namedArgs.containsKey('keepScrollOffset') ? namedArgs['keepScrollOffset'] : true,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TrackingScrollController(
+                initialScrollOffset:
+                    namedArgs.containsKey('initialScrollOffset')
+                        ? namedArgs['initialScrollOffset']
+                        : 0.0,
+                keepScrollOffset: namedArgs.containsKey('keepScrollOffset')
+                    ? namedArgs['keepScrollOffset']
+                    : true,
+                debugLabel: namedArgs.containsKey('debugLabel')
+                    ? namedArgs['debugLabel']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -98,7 +122,8 @@ class TrackingScrollControllerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -107,7 +132,7 @@ extension TrackingScrollControllerBinding on TrackingScrollController {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TrackingScrollController');
+        return const HTType('TrackingScrollController');
       case 'keepScrollOffset':
         return keepScrollOffset;
       case 'debugLabel':
@@ -123,30 +148,39 @@ extension TrackingScrollControllerBinding on TrackingScrollController {
       case 'offset':
         return offset;
       case 'attach':
-        return ({positionalArgs, namedArgs, typeArgs}) => attach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attach(positionalArgs[0]);
       case 'detach':
-        return ({positionalArgs, namedArgs, typeArgs}) => detach(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            detach(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'jumpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpTo(positionalArgs[0]);
-      case 'createScrollPosition':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            createScrollPosition(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            jumpTo(positionalArgs[0]);
+      case 'createScrollPosition':
+        return ({positionalArgs, namedArgs, typeArgs}) => createScrollPosition(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_metrics.g.dart b/lib/bindings/flutter/widgets/scroll_metrics.g.dart
index d08ed2c..3a194ff 100644
--- a/lib/bindings/flutter/widgets/scroll_metrics.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_metrics.g.dart
@@ -15,7 +15,7 @@ class FixedScrollMetricsAutoBinding extends HTExternalClass {
             viewportDimension: namedArgs['viewportDimension'],
             axisDirection: namedArgs['axisDirection']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +29,7 @@ extension FixedScrollMetricsBinding on FixedScrollMetrics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FixedScrollMetrics');
+        return const HTType('FixedScrollMetrics');
       case 'axisDirection':
         return axisDirection;
       case 'minScrollExtent':
@@ -62,13 +62,22 @@ extension FixedScrollMetricsBinding on FixedScrollMetrics {
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'copyWith':
         return ({positionalArgs, namedArgs, typeArgs}) => copyWith(
-            minScrollExtent: namedArgs.containsKey('minScrollExtent') ? namedArgs['minScrollExtent'] : null,
-            maxScrollExtent: namedArgs.containsKey('maxScrollExtent') ? namedArgs['maxScrollExtent'] : null,
-            pixels: namedArgs.containsKey('pixels') ? namedArgs['pixels'] : null,
-            viewportDimension: namedArgs.containsKey('viewportDimension') ? namedArgs['viewportDimension'] : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : null);
+            minScrollExtent: namedArgs.containsKey('minScrollExtent')
+                ? namedArgs['minScrollExtent']
+                : null,
+            maxScrollExtent: namedArgs.containsKey('maxScrollExtent')
+                ? namedArgs['maxScrollExtent']
+                : null,
+            pixels:
+                namedArgs.containsKey('pixels') ? namedArgs['pixels'] : null,
+            viewportDimension: namedArgs.containsKey('viewportDimension')
+                ? namedArgs['viewportDimension']
+                : null,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_notification.g.dart b/lib/bindings/flutter/widgets/scroll_notification.g.dart
index 9f98463..5dfa4b8 100644
--- a/lib/bindings/flutter/widgets/scroll_notification.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_notification.g.dart
@@ -8,12 +8,15 @@ class ScrollStartNotificationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScrollStartNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScrollStartNotification(
-            metrics: namedArgs['metrics'],
-            context: namedArgs['context'],
-            dragDetails: namedArgs.containsKey('dragDetails') ? namedArgs['dragDetails'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScrollStartNotification(
+                metrics: namedArgs['metrics'],
+                context: namedArgs['context'],
+                dragDetails: namedArgs.containsKey('dragDetails')
+                    ? namedArgs['dragDetails']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +30,7 @@ extension ScrollStartNotificationBinding on ScrollStartNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollStartNotification');
+        return const HTType('ScrollStartNotification');
       case 'dragDetails':
         return dragDetails;
       case 'metrics':
@@ -37,15 +40,18 @@ extension ScrollStartNotificationBinding on ScrollStartNotification {
       case 'depth':
         return depth;
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'visitAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestor(positionalArgs[0]);
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -57,13 +63,18 @@ class ScrollUpdateNotificationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScrollUpdateNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScrollUpdateNotification(
-            metrics: namedArgs['metrics'],
-            context: namedArgs['context'],
-            dragDetails: namedArgs.containsKey('dragDetails') ? namedArgs['dragDetails'] : null,
-            scrollDelta: namedArgs.containsKey('scrollDelta') ? namedArgs['scrollDelta'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScrollUpdateNotification(
+                metrics: namedArgs['metrics'],
+                context: namedArgs['context'],
+                dragDetails: namedArgs.containsKey('dragDetails')
+                    ? namedArgs['dragDetails']
+                    : null,
+                scrollDelta: namedArgs.containsKey('scrollDelta')
+                    ? namedArgs['scrollDelta']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -77,7 +88,7 @@ extension ScrollUpdateNotificationBinding on ScrollUpdateNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollUpdateNotification');
+        return const HTType('ScrollUpdateNotification');
       case 'dragDetails':
         return dragDetails;
       case 'scrollDelta':
@@ -89,15 +100,18 @@ extension ScrollUpdateNotificationBinding on ScrollUpdateNotification {
       case 'depth':
         return depth;
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'visitAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestor(positionalArgs[0]);
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -109,14 +123,19 @@ class OverscrollNotificationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'OverscrollNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => OverscrollNotification(
-            metrics: namedArgs['metrics'],
-            context: namedArgs['context'],
-            dragDetails: namedArgs.containsKey('dragDetails') ? namedArgs['dragDetails'] : null,
-            overscroll: namedArgs['overscroll'],
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : 0.0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            OverscrollNotification(
+                metrics: namedArgs['metrics'],
+                context: namedArgs['context'],
+                dragDetails: namedArgs.containsKey('dragDetails')
+                    ? namedArgs['dragDetails']
+                    : null,
+                overscroll: namedArgs['overscroll'],
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : 0.0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -130,7 +149,7 @@ extension OverscrollNotificationBinding on OverscrollNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('OverscrollNotification');
+        return const HTType('OverscrollNotification');
       case 'dragDetails':
         return dragDetails;
       case 'overscroll':
@@ -144,15 +163,18 @@ extension OverscrollNotificationBinding on OverscrollNotification {
       case 'depth':
         return depth;
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'visitAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestor(positionalArgs[0]);
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -167,9 +189,11 @@ class ScrollEndNotificationAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollEndNotification(
             metrics: namedArgs['metrics'],
             context: namedArgs['context'],
-            dragDetails: namedArgs.containsKey('dragDetails') ? namedArgs['dragDetails'] : null);
+            dragDetails: namedArgs.containsKey('dragDetails')
+                ? namedArgs['dragDetails']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -183,7 +207,7 @@ extension ScrollEndNotificationBinding on ScrollEndNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollEndNotification');
+        return const HTType('ScrollEndNotification');
       case 'dragDetails':
         return dragDetails;
       case 'metrics':
@@ -193,15 +217,18 @@ extension ScrollEndNotificationBinding on ScrollEndNotification {
       case 'depth':
         return depth;
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'visitAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestor(positionalArgs[0]);
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -213,10 +240,13 @@ class UserScrollNotificationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'UserScrollNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => UserScrollNotification(
-            metrics: namedArgs['metrics'], context: namedArgs['context'], direction: namedArgs['direction']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            UserScrollNotification(
+                metrics: namedArgs['metrics'],
+                context: namedArgs['context'],
+                direction: namedArgs['direction']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -230,7 +260,7 @@ extension UserScrollNotificationBinding on UserScrollNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('UserScrollNotification');
+        return const HTType('UserScrollNotification');
       case 'direction':
         return direction;
       case 'metrics':
@@ -240,15 +270,18 @@ extension UserScrollNotificationBinding on UserScrollNotification {
       case 'depth':
         return depth;
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'visitAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestor(positionalArgs[0]);
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_physics.g.dart b/lib/bindings/flutter/widgets/scroll_physics.g.dart
index 1180f49..ed825d2 100644
--- a/lib/bindings/flutter/widgets/scroll_physics.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_physics.g.dart
@@ -8,10 +8,11 @@ class ScrollPhysicsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScrollPhysics':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ScrollPhysics(
+            parent:
+                namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -25,7 +26,7 @@ extension ScrollPhysicsBinding on ScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollPhysics');
+        return const HTType('ScrollPhysics');
       case 'parent':
         return parent;
       case 'spring':
@@ -43,47 +44,65 @@ extension ScrollPhysicsBinding on ScrollPhysics {
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'applyPhysicsToUserOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RangeMaintainingScrollPhysicsAutoBinding extends HTExternalClass {
-  RangeMaintainingScrollPhysicsAutoBinding() : super('RangeMaintainingScrollPhysics');
+  RangeMaintainingScrollPhysicsAutoBinding()
+      : super('RangeMaintainingScrollPhysics');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RangeMaintainingScrollPhysics':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            RangeMaintainingScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+            RangeMaintainingScrollPhysics(
+                parent: namedArgs.containsKey('parent')
+                    ? namedArgs['parent']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -93,11 +112,12 @@ class RangeMaintainingScrollPhysicsAutoBinding extends HTExternalClass {
   }
 }
 
-extension RangeMaintainingScrollPhysicsBinding on RangeMaintainingScrollPhysics {
+extension RangeMaintainingScrollPhysicsBinding
+    on RangeMaintainingScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RangeMaintainingScrollPhysics');
+        return const HTType('RangeMaintainingScrollPhysics');
       case 'parent':
         return parent;
       case 'spring':
@@ -115,32 +135,46 @@ extension RangeMaintainingScrollPhysicsBinding on RangeMaintainingScrollPhysics
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'applyPhysicsToUserOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -152,10 +186,11 @@ class BouncingScrollPhysicsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BouncingScrollPhysics':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            BouncingScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => BouncingScrollPhysics(
+            parent:
+                namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -169,7 +204,7 @@ extension BouncingScrollPhysicsBinding on BouncingScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BouncingScrollPhysics');
+        return const HTType('BouncingScrollPhysics');
       case 'parent':
         return parent;
       case 'minFlingVelocity':
@@ -187,34 +222,49 @@ extension BouncingScrollPhysicsBinding on BouncingScrollPhysics {
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'frictionFactor':
-        return ({positionalArgs, namedArgs, typeArgs}) => frictionFactor(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            frictionFactor(positionalArgs[0]);
       case 'applyPhysicsToUserOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -226,10 +276,11 @@ class ClampingScrollPhysicsAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ClampingScrollPhysics':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ClampingScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ClampingScrollPhysics(
+            parent:
+                namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -243,7 +294,7 @@ extension ClampingScrollPhysicsBinding on ClampingScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClampingScrollPhysics');
+        return const HTType('ClampingScrollPhysics');
       case 'parent':
         return parent;
       case 'spring':
@@ -261,9 +312,11 @@ extension ClampingScrollPhysicsBinding on ClampingScrollPhysics {
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
@@ -271,37 +324,53 @@ extension ClampingScrollPhysicsBinding on ClampingScrollPhysics {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class AlwaysScrollableScrollPhysicsAutoBinding extends HTExternalClass {
-  AlwaysScrollableScrollPhysicsAutoBinding() : super('AlwaysScrollableScrollPhysics');
+  AlwaysScrollableScrollPhysicsAutoBinding()
+      : super('AlwaysScrollableScrollPhysics');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'AlwaysScrollableScrollPhysics':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            AlwaysScrollableScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+            AlwaysScrollableScrollPhysics(
+                parent: namedArgs.containsKey('parent')
+                    ? namedArgs['parent']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -311,11 +380,12 @@ class AlwaysScrollableScrollPhysicsAutoBinding extends HTExternalClass {
   }
 }
 
-extension AlwaysScrollableScrollPhysicsBinding on AlwaysScrollableScrollPhysics {
+extension AlwaysScrollableScrollPhysicsBinding
+    on AlwaysScrollableScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AlwaysScrollableScrollPhysics');
+        return const HTType('AlwaysScrollableScrollPhysics');
       case 'parent':
         return parent;
       case 'spring':
@@ -333,47 +403,65 @@ extension AlwaysScrollableScrollPhysicsBinding on AlwaysScrollableScrollPhysics
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'applyPhysicsToUserOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class NeverScrollableScrollPhysicsAutoBinding extends HTExternalClass {
-  NeverScrollableScrollPhysicsAutoBinding() : super('NeverScrollableScrollPhysics');
+  NeverScrollableScrollPhysicsAutoBinding()
+      : super('NeverScrollableScrollPhysics');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'NeverScrollableScrollPhysics':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            NeverScrollableScrollPhysics(parent: namedArgs.containsKey('parent') ? namedArgs['parent'] : null);
+            NeverScrollableScrollPhysics(
+                parent: namedArgs.containsKey('parent')
+                    ? namedArgs['parent']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -387,7 +475,7 @@ extension NeverScrollableScrollPhysicsBinding on NeverScrollableScrollPhysics {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('NeverScrollableScrollPhysics');
+        return const HTType('NeverScrollableScrollPhysics');
       case 'parent':
         return parent;
       case 'allowImplicitScrolling':
@@ -405,32 +493,46 @@ extension NeverScrollableScrollPhysicsBinding on NeverScrollableScrollPhysics {
       case 'dragStartDistanceMotionThreshold':
         return dragStartDistanceMotionThreshold;
       case 'applyTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyTo(positionalArgs[0]);
       case 'shouldAcceptUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldAcceptUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldAcceptUserOffset(positionalArgs[0]);
       case 'applyPhysicsToUserOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             applyPhysicsToUserOffset(positionalArgs[0], positionalArgs[1]);
       case 'recommendDeferredLoading':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            recommendDeferredLoading(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            recommendDeferredLoading(
+                positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'applyBoundaryConditions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyBoundaryConditions(positionalArgs[0], positionalArgs[1]);
       case 'adjustPositionForNewDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => adjustPositionForNewDimensions(
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            newPosition: namedArgs.containsKey('newPosition') ? namedArgs['newPosition'] : null,
-            isScrolling: namedArgs.containsKey('isScrolling') ? namedArgs['isScrolling'] : null,
-            velocity: namedArgs.containsKey('velocity') ? namedArgs['velocity'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            adjustPositionForNewDimensions(
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                newPosition: namedArgs.containsKey('newPosition')
+                    ? namedArgs['newPosition']
+                    : null,
+                isScrolling: namedArgs.containsKey('isScrolling')
+                    ? namedArgs['isScrolling']
+                    : null,
+                velocity: namedArgs.containsKey('velocity')
+                    ? namedArgs['velocity']
+                    : null);
       case 'createBallisticSimulation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             createBallisticSimulation(positionalArgs[0], positionalArgs[1]);
       case 'carriedMomentum':
-        return ({positionalArgs, namedArgs, typeArgs}) => carriedMomentum(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            carriedMomentum(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_position.g.dart b/lib/bindings/flutter/widgets/scroll_position.g.dart
index e3f6222..2e53f13 100644
--- a/lib/bindings/flutter/widgets/scroll_position.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_position.g.dart
@@ -2,7 +2,8 @@ import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/widgets.dart';
 
 class ScrollPositionAlignmentPolicyAutoBinding extends HTExternalClass {
-  ScrollPositionAlignmentPolicyAutoBinding() : super('ScrollPositionAlignmentPolicy');
+  ScrollPositionAlignmentPolicyAutoBinding()
+      : super('ScrollPositionAlignmentPolicy');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
@@ -16,7 +17,7 @@ class ScrollPositionAlignmentPolicyAutoBinding extends HTExternalClass {
       case 'ScrollPositionAlignmentPolicy.keepVisibleAtStart':
         return ScrollPositionAlignmentPolicy.keepVisibleAtStart;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +25,14 @@ class ScrollPositionAlignmentPolicyAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollPositionAlignmentPolicy');
+        return const HTType('ScrollPositionAlignmentPolicy');
       case 'index':
         return (instance as ScrollPositionAlignmentPolicy).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ScrollPositionAlignmentPolicy).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ScrollPositionAlignmentPolicy).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_position_with_single_context.g.dart b/lib/bindings/flutter/widgets/scroll_position_with_single_context.g.dart
index 1dc1454..53be0f1 100644
--- a/lib/bindings/flutter/widgets/scroll_position_with_single_context.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_position_with_single_context.g.dart
@@ -2,21 +2,31 @@ import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/widgets.dart';
 
 class ScrollPositionWithSingleContextAutoBinding extends HTExternalClass {
-  ScrollPositionWithSingleContextAutoBinding() : super('ScrollPositionWithSingleContext');
+  ScrollPositionWithSingleContextAutoBinding()
+      : super('ScrollPositionWithSingleContext');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScrollPositionWithSingleContext':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScrollPositionWithSingleContext(
-            physics: namedArgs['physics'],
-            context: namedArgs['context'],
-            initialPixels: namedArgs.containsKey('initialPixels') ? namedArgs['initialPixels'] : 0.0,
-            keepScrollOffset: namedArgs.containsKey('keepScrollOffset') ? namedArgs['keepScrollOffset'] : true,
-            oldPosition: namedArgs.containsKey('oldPosition') ? namedArgs['oldPosition'] : null,
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScrollPositionWithSingleContext(
+                physics: namedArgs['physics'],
+                context: namedArgs['context'],
+                initialPixels: namedArgs.containsKey('initialPixels')
+                    ? namedArgs['initialPixels']
+                    : 0.0,
+                keepScrollOffset: namedArgs.containsKey('keepScrollOffset')
+                    ? namedArgs['keepScrollOffset']
+                    : true,
+                oldPosition: namedArgs.containsKey('oldPosition')
+                    ? namedArgs['oldPosition']
+                    : null,
+                debugLabel: namedArgs.containsKey('debugLabel')
+                    ? namedArgs['debugLabel']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,16 +37,18 @@ class ScrollPositionWithSingleContextAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
 
-extension ScrollPositionWithSingleContextBinding on ScrollPositionWithSingleContext {
+extension ScrollPositionWithSingleContextBinding
+    on ScrollPositionWithSingleContext {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollPositionWithSingleContext');
+        return const HTType('ScrollPositionWithSingleContext');
       case 'physics':
         return physics;
       case 'context':
@@ -70,82 +82,120 @@ extension ScrollPositionWithSingleContextBinding on ScrollPositionWithSingleCont
       case 'allowImplicitScrolling':
         return allowImplicitScrolling;
       case 'setPixels':
-        return ({positionalArgs, namedArgs, typeArgs}) => setPixels(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setPixels(positionalArgs[0]);
       case 'absorb':
-        return ({positionalArgs, namedArgs, typeArgs}) => absorb(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            absorb(positionalArgs[0]);
       case 'applyNewDimensions':
         return ({positionalArgs, namedArgs, typeArgs}) => applyNewDimensions();
       case 'beginActivity':
-        return ({positionalArgs, namedArgs, typeArgs}) => beginActivity(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            beginActivity(positionalArgs[0]);
       case 'applyUserOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyUserOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyUserOffset(positionalArgs[0]);
       case 'goIdle':
         return ({positionalArgs, namedArgs, typeArgs}) => goIdle();
       case 'goBallistic':
-        return ({positionalArgs, namedArgs, typeArgs}) => goBallistic(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            goBallistic(positionalArgs[0]);
       case 'animateTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => animateTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null);
       case 'jumpTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => jumpTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            jumpTo(positionalArgs[0]);
       case 'pointerScroll':
-        return ({positionalArgs, namedArgs, typeArgs}) => pointerScroll(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            pointerScroll(positionalArgs[0]);
       case 'hold':
-        return ({positionalArgs, namedArgs, typeArgs}) => hold(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hold(positionalArgs[0]);
       case 'drag':
-        return ({positionalArgs, namedArgs, typeArgs}) => drag(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            drag(positionalArgs[0], positionalArgs[1]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'debugFillDescription':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillDescription(List<String>.from(positionalArgs[0]));
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillDescription(List<String>.from(positionalArgs[0]));
       case 'correctPixels':
-        return ({positionalArgs, namedArgs, typeArgs}) => correctPixels(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            correctPixels(positionalArgs[0]);
       case 'correctBy':
-        return ({positionalArgs, namedArgs, typeArgs}) => correctBy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            correctBy(positionalArgs[0]);
       case 'restoreOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => restoreOffset(positionalArgs[0],
-            initialRestore: namedArgs.containsKey('initialRestore') ? namedArgs['initialRestore'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) => restoreOffset(
+            positionalArgs[0],
+            initialRestore: namedArgs.containsKey('initialRestore')
+                ? namedArgs['initialRestore']
+                : false);
       case 'applyViewportDimension':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyViewportDimension(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyViewportDimension(positionalArgs[0]);
       case 'applyContentDimensions':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyContentDimensions(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyContentDimensions(positionalArgs[0], positionalArgs[1]);
       case 'ensureVisible':
-        return ({positionalArgs, namedArgs, typeArgs}) => ensureVisible(positionalArgs[0],
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : 0.0,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease,
+        return ({positionalArgs, namedArgs, typeArgs}) => ensureVisible(
+            positionalArgs[0],
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : 0.0,
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : Duration.zero,
+            curve: namedArgs.containsKey('curve')
+                ? namedArgs['curve']
+                : Curves.ease,
             alignmentPolicy: namedArgs.containsKey('alignmentPolicy')
                 ? namedArgs['alignmentPolicy']
                 : ScrollPositionAlignmentPolicy.explicit,
-            targetRenderObject: namedArgs.containsKey('targetRenderObject') ? namedArgs['targetRenderObject'] : null);
+            targetRenderObject: namedArgs.containsKey('targetRenderObject')
+                ? namedArgs['targetRenderObject']
+                : null);
       case 'moveTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => moveTo(positionalArgs[0],
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : null,
+        return ({positionalArgs, namedArgs, typeArgs}) => moveTo(
+            positionalArgs[0],
+            duration: namedArgs.containsKey('duration')
+                ? namedArgs['duration']
+                : null,
             curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : null,
             clamp: namedArgs.containsKey('clamp') ? namedArgs['clamp'] : true);
       case 'didStartScroll':
         return ({positionalArgs, namedArgs, typeArgs}) => didStartScroll();
       case 'didUpdateScrollPositionBy':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateScrollPositionBy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateScrollPositionBy(positionalArgs[0]);
       case 'didEndScroll':
         return ({positionalArgs, namedArgs, typeArgs}) => didEndScroll();
       case 'didOverscrollBy':
-        return ({positionalArgs, namedArgs, typeArgs}) => didOverscrollBy(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didOverscrollBy(positionalArgs[0]);
       case 'didUpdateScrollDirection':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateScrollDirection(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateScrollDirection(positionalArgs[0]);
       case 'recommendDeferredLoading':
-        return ({positionalArgs, namedArgs, typeArgs}) => recommendDeferredLoading(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            recommendDeferredLoading(positionalArgs[0]);
       case 'notifyListeners':
         return ({positionalArgs, namedArgs, typeArgs}) => notifyListeners();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_simulation.g.dart b/lib/bindings/flutter/widgets/scroll_simulation.g.dart
index f66411b..05075dc 100644
--- a/lib/bindings/flutter/widgets/scroll_simulation.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_simulation.g.dart
@@ -9,17 +9,20 @@ class BouncingScrollSimulationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'BouncingScrollSimulation':
-        return ({positionalArgs, namedArgs, typeArgs}) => BouncingScrollSimulation(
-            position: namedArgs['position'],
-            velocity: namedArgs['velocity'],
-            leadingExtent: namedArgs['leadingExtent'],
-            trailingExtent: namedArgs['trailingExtent'],
-            spring: namedArgs['spring'],
-            tolerance: namedArgs.containsKey('tolerance') ? namedArgs['tolerance'] : Tolerance.defaultTolerance);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            BouncingScrollSimulation(
+                position: namedArgs['position'],
+                velocity: namedArgs['velocity'],
+                leadingExtent: namedArgs['leadingExtent'],
+                trailingExtent: namedArgs['trailingExtent'],
+                spring: namedArgs['spring'],
+                tolerance: namedArgs.containsKey('tolerance')
+                    ? namedArgs['tolerance']
+                    : Tolerance.defaultTolerance);
       case 'BouncingScrollSimulation.maxSpringTransferVelocity':
         return BouncingScrollSimulation.maxSpringTransferVelocity;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -38,7 +41,7 @@ extension BouncingScrollSimulationBinding on BouncingScrollSimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('BouncingScrollSimulation');
+        return const HTType('BouncingScrollSimulation');
       case 'leadingExtent':
         return leadingExtent;
       case 'trailingExtent':
@@ -52,11 +55,12 @@ extension BouncingScrollSimulationBinding on BouncingScrollSimulation {
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -66,7 +70,7 @@ extension BouncingScrollSimulationBinding on BouncingScrollSimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -78,13 +82,18 @@ class ClampingScrollSimulationAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ClampingScrollSimulation':
-        return ({positionalArgs, namedArgs, typeArgs}) => ClampingScrollSimulation(
-            position: namedArgs['position'],
-            velocity: namedArgs['velocity'],
-            friction: namedArgs.containsKey('friction') ? namedArgs['friction'] : 0.015,
-            tolerance: namedArgs.containsKey('tolerance') ? namedArgs['tolerance'] : Tolerance.defaultTolerance);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ClampingScrollSimulation(
+                position: namedArgs['position'],
+                velocity: namedArgs['velocity'],
+                friction: namedArgs.containsKey('friction')
+                    ? namedArgs['friction']
+                    : 0.015,
+                tolerance: namedArgs.containsKey('tolerance')
+                    ? namedArgs['tolerance']
+                    : Tolerance.defaultTolerance);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -103,7 +112,7 @@ extension ClampingScrollSimulationBinding on ClampingScrollSimulation {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClampingScrollSimulation');
+        return const HTType('ClampingScrollSimulation');
       case 'position':
         return position;
       case 'velocity':
@@ -117,11 +126,12 @@ extension ClampingScrollSimulationBinding on ClampingScrollSimulation {
       case 'dx':
         return ({positionalArgs, namedArgs, typeArgs}) => dx(positionalArgs[0]);
       case 'isDone':
-        return ({positionalArgs, namedArgs, typeArgs}) => isDone(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isDone(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -131,7 +141,7 @@ extension ClampingScrollSimulationBinding on ClampingScrollSimulation {
         tolerance = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scroll_view.g.dart b/lib/bindings/flutter/widgets/scroll_view.g.dart
index 60a628e..5707150 100644
--- a/lib/bindings/flutter/widgets/scroll_view.g.dart
+++ b/lib/bindings/flutter/widgets/scroll_view.g.dart
@@ -4,7 +4,8 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/gestures.dart';
 
 class ScrollViewKeyboardDismissBehaviorAutoBinding extends HTExternalClass {
-  ScrollViewKeyboardDismissBehaviorAutoBinding() : super('ScrollViewKeyboardDismissBehavior');
+  ScrollViewKeyboardDismissBehaviorAutoBinding()
+      : super('ScrollViewKeyboardDismissBehavior');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
@@ -16,7 +17,7 @@ class ScrollViewKeyboardDismissBehaviorAutoBinding extends HTExternalClass {
       case 'ScrollViewKeyboardDismissBehavior.onDrag':
         return ScrollViewKeyboardDismissBehavior.onDrag;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +25,14 @@ class ScrollViewKeyboardDismissBehaviorAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollViewKeyboardDismissBehavior');
+        return const HTType('ScrollViewKeyboardDismissBehavior');
       case 'index':
         return (instance as ScrollViewKeyboardDismissBehavior).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ScrollViewKeyboardDismissBehavior).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ScrollViewKeyboardDismissBehavior).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,26 +46,48 @@ class CustomScrollViewAutoBinding extends HTExternalClass {
       case 'CustomScrollView':
         return ({positionalArgs, namedArgs, typeArgs}) => CustomScrollView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            center:
+                namedArgs.containsKey('center') ? namedArgs['center'] : null,
             anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            slivers: namedArgs.containsKey('slivers') ? List<Widget>.from(namedArgs['slivers']) : const <Widget>[],
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            slivers: namedArgs.containsKey('slivers')
+                ? List<Widget>.from(namedArgs['slivers'])
+                : const <Widget>[],
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -77,7 +101,7 @@ extension CustomScrollViewBinding on CustomScrollView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('CustomScrollView');
+        return const HTType('CustomScrollView');
       case 'slivers':
         return slivers;
       case 'scrollDirection':
@@ -113,33 +137,47 @@ extension CustomScrollViewBinding on CustomScrollView {
       case 'hashCode':
         return hashCode;
       case 'buildSlivers':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildSlivers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildSlivers(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -153,105 +191,208 @@ class ListViewAutoBinding extends HTExternalClass {
       case 'ListView':
         return ({positionalArgs, namedArgs, typeArgs}) => ListView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            itemExtent: namedArgs.containsKey('itemExtent') ? namedArgs['itemExtent'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            itemExtent: namedArgs.containsKey('itemExtent')
+                ? namedArgs['itemExtent']
+                : null,
             addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+                namedArgs.containsKey('addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+            addRepaintBoundaries: namedArgs.containsKey('addRepaintBoundaries')
+                ? namedArgs['addRepaintBoundaries']
+                : true,
+            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                ? namedArgs['addSemanticIndexes']
+                : true,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       case 'ListView.builder':
         return ({positionalArgs, namedArgs, typeArgs}) => ListView.builder(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            itemExtent: namedArgs.containsKey('itemExtent') ? namedArgs['itemExtent'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            itemExtent: namedArgs.containsKey('itemExtent')
+                ? namedArgs['itemExtent']
+                : null,
             itemBuilder: namedArgs['itemBuilder'],
-            itemCount: namedArgs.containsKey('itemCount') ? namedArgs['itemCount'] : null,
+            itemCount: namedArgs.containsKey('itemCount')
+                ? namedArgs['itemCount']
+                : null,
             addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+                namedArgs.containsKey('addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+            addRepaintBoundaries: namedArgs.containsKey('addRepaintBoundaries')
+                ? namedArgs['addRepaintBoundaries']
+                : true,
+            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                ? namedArgs['addSemanticIndexes']
+                : true,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'ListView.separated':
         return ({positionalArgs, namedArgs, typeArgs}) => ListView.separated(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             itemBuilder: namedArgs['itemBuilder'],
             separatorBuilder: namedArgs['separatorBuilder'],
             itemCount: namedArgs['itemCount'],
             addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+                namedArgs.containsKey('addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+            addRepaintBoundaries: namedArgs.containsKey('addRepaintBoundaries')
+                ? namedArgs['addRepaintBoundaries']
+                : true,
+            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                ? namedArgs['addSemanticIndexes']
+                : true,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'ListView.custom':
         return ({positionalArgs, namedArgs, typeArgs}) => ListView.custom(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            itemExtent: namedArgs.containsKey('itemExtent') ? namedArgs['itemExtent'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            itemExtent: namedArgs.containsKey('itemExtent')
+                ? namedArgs['itemExtent']
+                : null,
             childrenDelegate: namedArgs['childrenDelegate'],
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -262,8 +403,9 @@ class ListViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'IndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget,
+      'IndexedWidgetBuilder': (HTFunction function) => (context, index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget,
     };
   }
 }
@@ -272,7 +414,7 @@ extension ListViewBinding on ListView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ListView');
+        return const HTType('ListView');
       case 'itemExtent':
         return itemExtent;
       case 'childrenDelegate':
@@ -312,35 +454,50 @@ extension ListViewBinding on ListView {
       case 'hashCode':
         return hashCode;
       case 'buildChildLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildChildLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildChildLayout(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'buildSlivers':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildSlivers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildSlivers(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -354,137 +511,277 @@ class GridViewAutoBinding extends HTExternalClass {
       case 'GridView':
         return ({positionalArgs, namedArgs, typeArgs}) => GridView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             gridDelegate: namedArgs['gridDelegate'],
             addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+                namedArgs.containsKey('addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+            addRepaintBoundaries: namedArgs.containsKey('addRepaintBoundaries')
+                ? namedArgs['addRepaintBoundaries']
+                : true,
+            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                ? namedArgs['addSemanticIndexes']
+                : true,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       case 'GridView.builder':
         return ({positionalArgs, namedArgs, typeArgs}) => GridView.builder(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             gridDelegate: namedArgs['gridDelegate'],
             itemBuilder: namedArgs['itemBuilder'],
-            itemCount: namedArgs.containsKey('itemCount') ? namedArgs['itemCount'] : null,
+            itemCount: namedArgs.containsKey('itemCount')
+                ? namedArgs['itemCount']
+                : null,
             addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+                namedArgs.containsKey('addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+            addRepaintBoundaries: namedArgs.containsKey('addRepaintBoundaries')
+                ? namedArgs['addRepaintBoundaries']
+                : true,
+            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                ? namedArgs['addSemanticIndexes']
+                : true,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'GridView.custom':
         return ({positionalArgs, namedArgs, typeArgs}) => GridView.custom(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             gridDelegate: namedArgs['gridDelegate'],
             childrenDelegate: namedArgs['childrenDelegate'],
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge);
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge);
       case 'GridView.count':
         return ({positionalArgs, namedArgs, typeArgs}) => GridView.count(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             crossAxisCount: namedArgs['crossAxisCount'],
-            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing') ? namedArgs['mainAxisSpacing'] : 0.0,
-            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing') ? namedArgs['crossAxisSpacing'] : 0.0,
-            childAspectRatio: namedArgs.containsKey('childAspectRatio') ? namedArgs['childAspectRatio'] : 1.0,
+            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing')
+                ? namedArgs['mainAxisSpacing']
+                : 0.0,
+            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing')
+                ? namedArgs['crossAxisSpacing']
+                : 0.0,
+            childAspectRatio: namedArgs.containsKey('childAspectRatio')
+                ? namedArgs['childAspectRatio']
+                : 1.0,
             addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+                namedArgs.containsKey('addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+            addRepaintBoundaries: namedArgs.containsKey('addRepaintBoundaries')
+                ? namedArgs['addRepaintBoundaries']
+                : true,
+            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                ? namedArgs['addSemanticIndexes']
+                : true,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       case 'GridView.extent':
         return ({positionalArgs, namedArgs, typeArgs}) => GridView.extent(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            shrinkWrap: namedArgs.containsKey('shrinkWrap') ? namedArgs['shrinkWrap'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            shrinkWrap: namedArgs.containsKey('shrinkWrap')
+                ? namedArgs['shrinkWrap']
+                : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
             maxCrossAxisExtent: namedArgs['maxCrossAxisExtent'],
-            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing') ? namedArgs['mainAxisSpacing'] : 0.0,
-            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing') ? namedArgs['crossAxisSpacing'] : 0.0,
-            childAspectRatio: namedArgs.containsKey('childAspectRatio') ? namedArgs['childAspectRatio'] : 1.0,
+            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing')
+                ? namedArgs['mainAxisSpacing']
+                : 0.0,
+            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing')
+                ? namedArgs['crossAxisSpacing']
+                : 0.0,
+            childAspectRatio: namedArgs.containsKey('childAspectRatio')
+                ? namedArgs['childAspectRatio']
+                : 1.0,
             addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            keyboardDismissBehavior: namedArgs.containsKey('keyboardDismissBehavior')
-                ? namedArgs['keyboardDismissBehavior']
-                : ScrollViewKeyboardDismissBehavior.manual,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+                namedArgs.containsKey('addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+            addRepaintBoundaries: namedArgs.containsKey('addRepaintBoundaries')
+                ? namedArgs['addRepaintBoundaries']
+                : true,
+            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                ? namedArgs['addSemanticIndexes']
+                : true,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            keyboardDismissBehavior:
+                namedArgs.containsKey('keyboardDismissBehavior')
+                    ? namedArgs['keyboardDismissBehavior']
+                    : ScrollViewKeyboardDismissBehavior.manual,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -495,8 +792,9 @@ class GridViewAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'IndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget,
+      'IndexedWidgetBuilder': (HTFunction function) => (context, index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget,
     };
   }
 }
@@ -505,7 +803,7 @@ extension GridViewBinding on GridView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('GridView');
+        return const HTType('GridView');
       case 'gridDelegate':
         return gridDelegate;
       case 'childrenDelegate':
@@ -545,35 +843,50 @@ extension GridViewBinding on GridView {
       case 'hashCode':
         return hashCode;
       case 'buildChildLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildChildLayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildChildLayout(positionalArgs[0]);
       case 'buildSlivers':
-        return ({positionalArgs, namedArgs, typeArgs}) => buildSlivers(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            buildSlivers(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scrollable.g.dart b/lib/bindings/flutter/widgets/scrollable.g.dart
index d3c2797..f0e154b 100644
--- a/lib/bindings/flutter/widgets/scrollable.g.dart
+++ b/lib/bindings/flutter/widgets/scrollable.g.dart
@@ -16,7 +16,7 @@ class ScrollIncrementTypeAutoBinding extends HTExternalClass {
       case 'ScrollIncrementType.page':
         return ScrollIncrementType.page;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,13 +24,14 @@ class ScrollIncrementTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollIncrementType');
+        return const HTType('ScrollIncrementType');
       case 'index':
         return (instance as ScrollIncrementType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ScrollIncrementType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ScrollIncrementType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -44,32 +45,53 @@ class ScrollableAutoBinding extends HTExternalClass {
       case 'Scrollable':
         return ({positionalArgs, namedArgs, typeArgs}) => Scrollable(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : AxisDirection.down,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
             viewportBuilder: namedArgs['viewportBuilder'],
-            incrementCalculator: namedArgs.containsKey('incrementCalculator') ? namedArgs['incrementCalculator'] : null,
-            excludeFromSemantics:
-                namedArgs.containsKey('excludeFromSemantics') ? namedArgs['excludeFromSemantics'] : false,
-            semanticChildCount: namedArgs.containsKey('semanticChildCount') ? namedArgs['semanticChildCount'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null);
+            incrementCalculator: namedArgs.containsKey('incrementCalculator')
+                ? namedArgs['incrementCalculator']
+                : null,
+            excludeFromSemantics: namedArgs.containsKey('excludeFromSemantics')
+                ? namedArgs['excludeFromSemantics']
+                : false,
+            semanticChildCount: namedArgs.containsKey('semanticChildCount')
+                ? namedArgs['semanticChildCount']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null);
       case 'Scrollable.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Scrollable.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Scrollable.of(positionalArgs[0]);
       case 'Scrollable.recommendDeferredLoadingForContext':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             Scrollable.recommendDeferredLoadingForContext(positionalArgs[0]);
       case 'Scrollable.ensureVisible':
-        return ({positionalArgs, namedArgs, typeArgs}) => Scrollable.ensureVisible(positionalArgs[0],
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : 0.0,
-            duration: namedArgs.containsKey('duration') ? namedArgs['duration'] : Duration.zero,
-            curve: namedArgs.containsKey('curve') ? namedArgs['curve'] : Curves.ease,
-            alignmentPolicy: namedArgs.containsKey('alignmentPolicy')
-                ? namedArgs['alignmentPolicy']
-                : ScrollPositionAlignmentPolicy.explicit);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Scrollable.ensureVisible(positionalArgs[0],
+                alignment: namedArgs.containsKey('alignment')
+                    ? namedArgs['alignment']
+                    : 0.0,
+                duration: namedArgs.containsKey('duration')
+                    ? namedArgs['duration']
+                    : Duration.zero,
+                curve: namedArgs.containsKey('curve')
+                    ? namedArgs['curve']
+                    : Curves.ease,
+                alignmentPolicy: namedArgs.containsKey('alignmentPolicy')
+                    ? namedArgs['alignmentPolicy']
+                    : ScrollPositionAlignmentPolicy.explicit);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,10 +102,13 @@ class ScrollableAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ViewportBuilder': (HTFunction function) =>
-          (context, position) => function.call(positionalArgs: [context, position], namedArgs: const {}) as Widget,
-      'ScrollIncrementCalculator': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}) as double,
+      'ViewportBuilder': (HTFunction function) => (context, position) =>
+          function.call(
+              positionalArgs: [context, position],
+              namedArgs: const {}) as Widget,
+      'ScrollIncrementCalculator': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {})
+              as double,
     };
   }
 }
@@ -92,7 +117,7 @@ extension ScrollableBinding on Scrollable {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Scrollable');
+        return const HTType('Scrollable');
       case 'axisDirection':
         return axisDirection;
       case 'controller':
@@ -120,29 +145,41 @@ extension ScrollableBinding on Scrollable {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -156,7 +193,7 @@ class ScrollableStateAutoBinding extends HTExternalClass {
       case 'ScrollableState':
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollableState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -167,8 +204,8 @@ class ScrollableStateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TickerCallback': (HTFunction function) =>
-          (elapsed) => function.call(positionalArgs: [elapsed], namedArgs: const {}),
+      'TickerCallback': (HTFunction function) => (elapsed) =>
+          function.call(positionalArgs: [elapsed], namedArgs: const {}),
     };
   }
 }
@@ -177,7 +214,7 @@ extension ScrollableStateBinding on ScrollableState {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollableState');
+        return const HTType('ScrollableState');
       case 'position':
         return position;
       case 'axisDirection':
@@ -201,32 +238,41 @@ extension ScrollableStateBinding on ScrollableState {
       case 'mounted':
         return mounted;
       case 'restoreState':
-        return ({positionalArgs, namedArgs, typeArgs}) => restoreState(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            restoreState(positionalArgs[0], positionalArgs[1]);
       case 'saveOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => saveOffset(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            saveOffset(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'didUpdateWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => didUpdateWidget(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didUpdateWidget(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createTicker':
-        return ({positionalArgs, namedArgs, typeArgs}) => createTicker(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createTicker(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -239,9 +285,10 @@ class ScrollIncrementDetailsAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ScrollIncrementDetails':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            ScrollIncrementDetails(type: namedArgs['type'], metrics: namedArgs['metrics']);
+            ScrollIncrementDetails(
+                type: namedArgs['type'], metrics: namedArgs['metrics']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -255,13 +302,13 @@ extension ScrollIncrementDetailsBinding on ScrollIncrementDetails {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollIncrementDetails');
+        return const HTType('ScrollIncrementDetails');
       case 'type':
         return type;
       case 'metrics':
         return metrics;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -275,9 +322,11 @@ class ScrollIntentAutoBinding extends HTExternalClass {
       case 'ScrollIntent':
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollIntent(
             direction: namedArgs['direction'],
-            type: namedArgs.containsKey('type') ? namedArgs['type'] : ScrollIncrementType.line);
+            type: namedArgs.containsKey('type')
+                ? namedArgs['type']
+                : ScrollIncrementType.line);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -291,7 +340,7 @@ extension ScrollIntentBinding on ScrollIntent {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollIntent');
+        return const HTType('ScrollIntent');
       case 'direction':
         return direction;
       case 'type':
@@ -299,14 +348,16 @@ extension ScrollIntentBinding on ScrollIntent {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -320,7 +371,7 @@ class ScrollActionAutoBinding extends HTExternalClass {
       case 'ScrollAction':
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollAction();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -331,8 +382,8 @@ class ScrollActionAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ActionListenerCallback': (HTFunction function) =>
-          (action) => function.call(positionalArgs: [action], namedArgs: const {}),
+      'ActionListenerCallback': (HTFunction function) => (action) =>
+          function.call(positionalArgs: [action], namedArgs: const {}),
     };
   }
 }
@@ -341,30 +392,37 @@ extension ScrollActionBinding on ScrollAction {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollAction');
+        return const HTType('ScrollAction');
       case 'intentType':
         return intentType;
       case 'isEnabled':
-        return ({positionalArgs, namedArgs, typeArgs}) => isEnabled(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isEnabled(positionalArgs[0]);
       case 'invoke':
-        return ({positionalArgs, namedArgs, typeArgs}) => invoke(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            invoke(positionalArgs[0]);
       case 'consumesKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => consumesKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            consumesKey(positionalArgs[0]);
       case 'addActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addActionListener(positionalArgs[0]);
       case 'removeActionListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeActionListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeActionListener(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/scrollbar.g.dart b/lib/bindings/flutter/widgets/scrollbar.g.dart
index 068398c..d8c98c5 100644
--- a/lib/bindings/flutter/widgets/scrollbar.g.dart
+++ b/lib/bindings/flutter/widgets/scrollbar.g.dart
@@ -18,20 +18,37 @@ class ScrollbarPainterAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ScrollbarPainter(
             color: namedArgs['color'],
             fadeoutOpacityAnimation: namedArgs['fadeoutOpacityAnimation'],
-            trackColor: namedArgs.containsKey('trackColor') ? namedArgs['trackColor'] : const Color(0x00000000),
-            trackBorderColor:
-                namedArgs.containsKey('trackBorderColor') ? namedArgs['trackBorderColor'] : const Color(0x00000000),
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : _kScrollbarThickness,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : EdgeInsets.zero,
-            mainAxisMargin: namedArgs.containsKey('mainAxisMargin') ? namedArgs['mainAxisMargin'] : 0.0,
-            crossAxisMargin: namedArgs.containsKey('crossAxisMargin') ? namedArgs['crossAxisMargin'] : 0.0,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            minLength: namedArgs.containsKey('minLength') ? namedArgs['minLength'] : _kMinThumbExtent,
-            minOverscrollLength:
-                namedArgs.containsKey('minOverscrollLength') ? namedArgs['minOverscrollLength'] : null);
+            trackColor: namedArgs.containsKey('trackColor')
+                ? namedArgs['trackColor']
+                : const Color(0x00000000),
+            trackBorderColor: namedArgs.containsKey('trackBorderColor')
+                ? namedArgs['trackBorderColor']
+                : const Color(0x00000000),
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : _kScrollbarThickness,
+            padding: namedArgs.containsKey('padding')
+                ? namedArgs['padding']
+                : EdgeInsets.zero,
+            mainAxisMargin: namedArgs.containsKey('mainAxisMargin')
+                ? namedArgs['mainAxisMargin']
+                : 0.0,
+            crossAxisMargin: namedArgs.containsKey('crossAxisMargin')
+                ? namedArgs['crossAxisMargin']
+                : 0.0,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            minLength: namedArgs.containsKey('minLength')
+                ? namedArgs['minLength']
+                : _kMinThumbExtent,
+            minOverscrollLength: namedArgs.containsKey('minOverscrollLength')
+                ? namedArgs['minOverscrollLength']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -47,7 +64,8 @@ class ScrollbarPainterAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -56,7 +74,7 @@ extension ScrollbarPainterBinding on ScrollbarPainter {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScrollbarPainter');
+        return const HTType('ScrollbarPainter');
       case 'fadeoutOpacityAnimation':
         return fadeoutOpacityAnimation;
       case 'color':
@@ -84,31 +102,42 @@ extension ScrollbarPainterBinding on ScrollbarPainter {
       case 'semanticsBuilder':
         return semanticsBuilder;
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0], positionalArgs[1]);
       case 'updateThickness':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateThickness(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateThickness(positionalArgs[0], positionalArgs[1]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'getTrackToScroll':
-        return ({positionalArgs, namedArgs, typeArgs}) => getTrackToScroll(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getTrackToScroll(positionalArgs[0]);
       case 'paint':
-        return ({positionalArgs, namedArgs, typeArgs}) => paint(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            paint(positionalArgs[0], positionalArgs[1]);
       case 'hitTestInteractive':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestInteractive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestInteractive(positionalArgs[0]);
       case 'hitTestOnlyThumbInteractive':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTestOnlyThumbInteractive(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTestOnlyThumbInteractive(positionalArgs[0]);
       case 'hitTest':
-        return ({positionalArgs, namedArgs, typeArgs}) => hitTest(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            hitTest(positionalArgs[0]);
       case 'shouldRepaint':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRepaint(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRepaint(positionalArgs[0]);
       case 'shouldRebuildSemantics':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRebuildSemantics(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRebuildSemantics(positionalArgs[0]);
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -148,7 +177,7 @@ extension ScrollbarPainterBinding on ScrollbarPainter {
         minOverscrollLength = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -163,19 +192,35 @@ class RawScrollbarAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RawScrollbar(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
-            isAlwaysShown: namedArgs.containsKey('isAlwaysShown') ? namedArgs['isAlwaysShown'] : null,
-            radius: namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
-            thickness: namedArgs.containsKey('thickness') ? namedArgs['thickness'] : null,
-            thumbColor: namedArgs.containsKey('thumbColor') ? namedArgs['thumbColor'] : null,
-            fadeDuration: namedArgs.containsKey('fadeDuration') ? namedArgs['fadeDuration'] : _kScrollbarFadeDuration,
-            timeToFade: namedArgs.containsKey('timeToFade') ? namedArgs['timeToFade'] : _kScrollbarTimeToFade,
-            pressDuration: namedArgs.containsKey('pressDuration') ? namedArgs['pressDuration'] : Duration.zero,
-            notificationPredicate: namedArgs.containsKey('notificationPredicate')
-                ? namedArgs['notificationPredicate']
-                : defaultScrollNotificationPredicate);
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
+            isAlwaysShown: namedArgs.containsKey('isAlwaysShown')
+                ? namedArgs['isAlwaysShown']
+                : null,
+            radius:
+                namedArgs.containsKey('radius') ? namedArgs['radius'] : null,
+            thickness: namedArgs.containsKey('thickness')
+                ? namedArgs['thickness']
+                : null,
+            thumbColor: namedArgs.containsKey('thumbColor')
+                ? namedArgs['thumbColor']
+                : null,
+            fadeDuration: namedArgs.containsKey('fadeDuration')
+                ? namedArgs['fadeDuration']
+                : _kScrollbarFadeDuration,
+            timeToFade: namedArgs.containsKey('timeToFade')
+                ? namedArgs['timeToFade']
+                : _kScrollbarTimeToFade,
+            pressDuration: namedArgs.containsKey('pressDuration')
+                ? namedArgs['pressDuration']
+                : Duration.zero,
+            notificationPredicate:
+                namedArgs.containsKey('notificationPredicate')
+                    ? namedArgs['notificationPredicate']
+                    : defaultScrollNotificationPredicate);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -186,8 +231,9 @@ class RawScrollbarAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ScrollNotificationPredicate': (HTFunction function) =>
-          (notification) => function.call(positionalArgs: [notification], namedArgs: const {}) as bool,
+      'ScrollNotificationPredicate': (HTFunction function) => (notification) =>
+          function.call(positionalArgs: [notification], namedArgs: const {})
+              as bool,
     };
   }
 }
@@ -196,7 +242,7 @@ extension RawScrollbarBinding on RawScrollbar {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RawScrollbar');
+        return const HTType('RawScrollbar');
       case 'child':
         return child;
       case 'controller':
@@ -228,25 +274,37 @@ extension RawScrollbarBinding on RawScrollbar {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/semantics_debugger.g.dart b/lib/bindings/flutter/widgets/semantics_debugger.g.dart
index 65809fa..0c17ba1 100644
--- a/lib/bindings/flutter/widgets/semantics_debugger.g.dart
+++ b/lib/bindings/flutter/widgets/semantics_debugger.g.dart
@@ -16,9 +16,10 @@ class SemanticsDebuggerAutoBinding extends HTExternalClass {
             child: namedArgs['child'],
             labelStyle: namedArgs.containsKey('labelStyle')
                 ? namedArgs['labelStyle']
-                : const TextStyle(color: Color(0xFF000000), fontSize: 10.0, height: 0.8));
+                : const TextStyle(
+                    color: Color(0xFF000000), fontSize: 10.0, height: 0.8));
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -32,7 +33,7 @@ extension SemanticsDebuggerBinding on SemanticsDebugger {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SemanticsDebugger');
+        return const HTType('SemanticsDebugger');
       case 'child':
         return child;
       case 'labelStyle':
@@ -48,25 +49,37 @@ extension SemanticsDebuggerBinding on SemanticsDebugger {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/shortcuts.g.dart b/lib/bindings/flutter/widgets/shortcuts.g.dart
index 385db60..3a2ed8b 100644
--- a/lib/bindings/flutter/widgets/shortcuts.g.dart
+++ b/lib/bindings/flutter/widgets/shortcuts.g.dart
@@ -15,9 +15,10 @@ class LogicalKeySetAutoBinding extends HTExternalClass {
             positionalArgs.length > 2 ? positionalArgs[2] : null,
             positionalArgs.length > 3 ? positionalArgs[3] : null);
       case 'LogicalKeySet.fromSet':
-        return ({positionalArgs, namedArgs, typeArgs}) => LogicalKeySet.fromSet(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            LogicalKeySet.fromSet(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -31,7 +32,7 @@ extension LogicalKeySetBinding on LogicalKeySet {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('LogicalKeySet');
+        return const HTType('LogicalKeySet');
       case 'keys':
         return keys;
       case 'hashCode':
@@ -39,18 +40,21 @@ extension LogicalKeySetBinding on LogicalKeySet {
       case 'debugDescribeKeys':
         return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeKeys();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -62,13 +66,22 @@ class ShortcutMapPropertyAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ShortcutMapProperty':
-        return ({positionalArgs, namedArgs, typeArgs}) => ShortcutMapProperty(positionalArgs[0], positionalArgs[1],
-            showName: namedArgs.containsKey('showName') ? namedArgs['showName'] : true,
-            defaultValue: namedArgs.containsKey('defaultValue') ? namedArgs['defaultValue'] : kNoDefaultValue,
-            level: namedArgs.containsKey('level') ? namedArgs['level'] : DiagnosticLevel.info,
-            description: namedArgs.containsKey('description') ? namedArgs['description'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ShortcutMapProperty(
+            positionalArgs[0], positionalArgs[1],
+            showName: namedArgs.containsKey('showName')
+                ? namedArgs['showName']
+                : true,
+            defaultValue: namedArgs.containsKey('defaultValue')
+                ? namedArgs['defaultValue']
+                : kNoDefaultValue,
+            level: namedArgs.containsKey('level')
+                ? namedArgs['level']
+                : DiagnosticLevel.info,
+            description: namedArgs.containsKey('description')
+                ? namedArgs['description']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -82,7 +95,7 @@ extension ShortcutMapPropertyBinding on ShortcutMapProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShortcutMapProperty');
+        return const HTType('ShortcutMapProperty');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -123,32 +136,48 @@ extension ShortcutMapPropertyBinding on ShortcutMapProperty {
         return allowTruncate;
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -161,10 +190,12 @@ class ShortcutManagerAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'ShortcutManager':
         return ({positionalArgs, namedArgs, typeArgs}) => ShortcutManager(
-            shortcuts: namedArgs.containsKey('shortcuts') ? namedArgs['shortcuts'] : const <LogicalKeySet, Intent>{},
+            shortcuts: namedArgs.containsKey('shortcuts')
+                ? namedArgs['shortcuts']
+                : const <LogicalKeySet, Intent>{},
             modal: namedArgs.containsKey('modal') ? namedArgs['modal'] : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -180,7 +211,8 @@ class ShortcutManagerAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -189,30 +221,35 @@ extension ShortcutManagerBinding on ShortcutManager {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShortcutManager');
+        return const HTType('ShortcutManager');
       case 'modal':
         return modal;
       case 'shortcuts':
         return shortcuts;
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -222,7 +259,7 @@ extension ShortcutManagerBinding on ShortcutManager {
         shortcuts = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -236,16 +273,21 @@ class ShortcutsAutoBinding extends HTExternalClass {
       case 'Shortcuts':
         return ({positionalArgs, namedArgs, typeArgs}) => Shortcuts(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            manager: namedArgs.containsKey('manager') ? namedArgs['manager'] : null,
+            manager:
+                namedArgs.containsKey('manager') ? namedArgs['manager'] : null,
             shortcuts: namedArgs['shortcuts'],
             child: namedArgs['child'],
-            debugLabel: namedArgs.containsKey('debugLabel') ? namedArgs['debugLabel'] : null);
+            debugLabel: namedArgs.containsKey('debugLabel')
+                ? namedArgs['debugLabel']
+                : null);
       case 'Shortcuts.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => Shortcuts.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Shortcuts.of(positionalArgs[0]);
       case 'Shortcuts.maybeOf':
-        return ({positionalArgs, namedArgs, typeArgs}) => Shortcuts.maybeOf(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            Shortcuts.maybeOf(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -259,7 +301,7 @@ extension ShortcutsBinding on Shortcuts {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Shortcuts');
+        return const HTType('Shortcuts');
       case 'manager':
         return manager;
       case 'shortcuts':
@@ -275,29 +317,41 @@ extension ShortcutsBinding on Shortcuts {
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/single_child_scroll_view.g.dart b/lib/bindings/flutter/widgets/single_child_scroll_view.g.dart
index f47e729..a2c2ce2 100644
--- a/lib/bindings/flutter/widgets/single_child_scroll_view.g.dart
+++ b/lib/bindings/flutter/widgets/single_child_scroll_view.g.dart
@@ -12,19 +12,32 @@ class SingleChildScrollViewAutoBinding extends HTExternalClass {
       case 'SingleChildScrollView':
         return ({positionalArgs, namedArgs, typeArgs}) => SingleChildScrollView(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            scrollDirection: namedArgs.containsKey('scrollDirection') ? namedArgs['scrollDirection'] : Axis.vertical,
-            reverse: namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
-            padding: namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
-            primary: namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
-            physics: namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
-            controller: namedArgs.containsKey('controller') ? namedArgs['controller'] : null,
+            scrollDirection: namedArgs.containsKey('scrollDirection')
+                ? namedArgs['scrollDirection']
+                : Axis.vertical,
+            reverse:
+                namedArgs.containsKey('reverse') ? namedArgs['reverse'] : false,
+            padding:
+                namedArgs.containsKey('padding') ? namedArgs['padding'] : null,
+            primary:
+                namedArgs.containsKey('primary') ? namedArgs['primary'] : null,
+            physics:
+                namedArgs.containsKey('physics') ? namedArgs['physics'] : null,
+            controller: namedArgs.containsKey('controller')
+                ? namedArgs['controller']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            restorationId: namedArgs.containsKey('restorationId') ? namedArgs['restorationId'] : null);
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            restorationId: namedArgs.containsKey('restorationId')
+                ? namedArgs['restorationId']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -38,7 +51,7 @@ extension SingleChildScrollViewBinding on SingleChildScrollView {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SingleChildScrollView');
+        return const HTType('SingleChildScrollView');
       case 'scrollDirection':
         return scrollDirection;
       case 'reverse':
@@ -64,31 +77,44 @@ extension SingleChildScrollViewBinding on SingleChildScrollView {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/size_changed_layout_notifier.g.dart b/lib/bindings/flutter/widgets/size_changed_layout_notifier.g.dart
index 5f0600a..a2f491d 100644
--- a/lib/bindings/flutter/widgets/size_changed_layout_notifier.g.dart
+++ b/lib/bindings/flutter/widgets/size_changed_layout_notifier.g.dart
@@ -3,15 +3,17 @@ import 'package:flutter/widgets.dart';
 import 'package:flutter/rendering.dart';
 
 class SizeChangedLayoutNotificationAutoBinding extends HTExternalClass {
-  SizeChangedLayoutNotificationAutoBinding() : super('SizeChangedLayoutNotification');
+  SizeChangedLayoutNotificationAutoBinding()
+      : super('SizeChangedLayoutNotification');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SizeChangedLayoutNotification':
-        return ({positionalArgs, namedArgs, typeArgs}) => SizeChangedLayoutNotification();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SizeChangedLayoutNotification();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -21,17 +23,19 @@ class SizeChangedLayoutNotificationAutoBinding extends HTExternalClass {
   }
 }
 
-extension SizeChangedLayoutNotificationBinding on SizeChangedLayoutNotification {
+extension SizeChangedLayoutNotificationBinding
+    on SizeChangedLayoutNotification {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SizeChangedLayoutNotification');
+        return const HTType('SizeChangedLayoutNotification');
       case 'dispatch':
-        return ({positionalArgs, namedArgs, typeArgs}) => dispatch(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dispatch(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -43,11 +47,13 @@ class SizeChangedLayoutNotifierAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SizeChangedLayoutNotifier':
-        return ({positionalArgs, namedArgs, typeArgs}) => SizeChangedLayoutNotifier(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SizeChangedLayoutNotifier(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -61,7 +67,7 @@ extension SizeChangedLayoutNotifierBinding on SizeChangedLayoutNotifier {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SizeChangedLayoutNotifier');
+        return const HTType('SizeChangedLayoutNotifier');
       case 'child':
         return child;
       case 'key':
@@ -69,31 +75,44 @@ extension SizeChangedLayoutNotifierBinding on SizeChangedLayoutNotifier {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/sliver.g.dart b/lib/bindings/flutter/widgets/sliver.g.dart
index e815c06..7f2d381 100644
--- a/lib/bindings/flutter/widgets/sliver.g.dart
+++ b/lib/bindings/flutter/widgets/sliver.g.dart
@@ -12,21 +12,40 @@ class SliverChildBuilderDelegateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverChildBuilderDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverChildBuilderDelegate(positionalArgs[0],
-            findChildIndexCallback:
-                namedArgs.containsKey('findChildIndexCallback') ? namedArgs['findChildIndexCallback'] : null,
-            childCount: namedArgs.containsKey('childCount') ? namedArgs['childCount'] : null,
-            addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            semanticIndexCallback: namedArgs.containsKey('semanticIndexCallback')
-                ? namedArgs['semanticIndexCallback']
-                : _kDefaultSemanticIndexCallback,
-            semanticIndexOffset: namedArgs.containsKey('semanticIndexOffset') ? namedArgs['semanticIndexOffset'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverChildBuilderDelegate(positionalArgs[0],
+                findChildIndexCallback: namedArgs.containsKey(
+                        'findChildIndexCallback')
+                    ? namedArgs['findChildIndexCallback']
+                    : null,
+                childCount: namedArgs.containsKey(
+                        'childCount')
+                    ? namedArgs['childCount']
+                    : null,
+                addAutomaticKeepAlives: namedArgs.containsKey(
+                        'addAutomaticKeepAlives')
+                    ? namedArgs['addAutomaticKeepAlives']
+                    : true,
+                addRepaintBoundaries:
+                    namedArgs.containsKey(
+                            'addRepaintBoundaries')
+                        ? namedArgs['addRepaintBoundaries']
+                        : true,
+                addSemanticIndexes:
+                    namedArgs.containsKey(
+                            'addSemanticIndexes')
+                        ? namedArgs['addSemanticIndexes']
+                        : true,
+                semanticIndexCallback:
+                    namedArgs.containsKey('semanticIndexCallback')
+                        ? namedArgs['semanticIndexCallback']
+                        : _kDefaultSemanticIndexCallback,
+                semanticIndexOffset:
+                    namedArgs.containsKey('semanticIndexOffset')
+                        ? namedArgs['semanticIndexOffset']
+                        : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -37,12 +56,16 @@ class SliverChildBuilderDelegateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'NullableIndexedWidgetBuilder': (HTFunction function) =>
-          (context, index) => function.call(positionalArgs: [context, index], namedArgs: const {}) as Widget?,
-      'ChildIndexGetter': (HTFunction function) =>
-          (key) => function.call(positionalArgs: [key], namedArgs: const {}) as int?,
-      'SemanticIndexCallback': (HTFunction function) =>
-          (widget, localIndex) => function.call(positionalArgs: [widget, localIndex], namedArgs: const {}) as int?,
+      'NullableIndexedWidgetBuilder': (HTFunction function) => (context,
+              index) =>
+          function.call(positionalArgs: [context, index], namedArgs: const {})
+              as Widget?,
+      'ChildIndexGetter': (HTFunction function) => (key) =>
+          function.call(positionalArgs: [key], namedArgs: const {}) as int?,
+      'SemanticIndexCallback': (HTFunction function) => (widget, localIndex) =>
+          function.call(
+              positionalArgs: [widget, localIndex],
+              namedArgs: const {}) as int?,
     };
   }
 }
@@ -51,7 +74,7 @@ extension SliverChildBuilderDelegateBinding on SliverChildBuilderDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverChildBuilderDelegate');
+        return const HTType('SliverChildBuilderDelegate');
       case 'builder':
         return builder;
       case 'childCount':
@@ -71,20 +94,25 @@ extension SliverChildBuilderDelegateBinding on SliverChildBuilderDelegate {
       case 'estimatedChildCount':
         return estimatedChildCount;
       case 'findIndexByKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => findIndexByKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findIndexByKey(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0], positionalArgs[1]);
       case 'shouldRebuild':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRebuild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRebuild(positionalArgs[0]);
       case 'estimateMaxScrollOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3]);
       case 'didFinishLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => didFinishLayout(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didFinishLayout(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -96,30 +124,56 @@ class SliverChildListDelegateAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverChildListDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverChildListDelegate(List<Widget>.from(positionalArgs[0]),
-            addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            semanticIndexCallback: namedArgs.containsKey('semanticIndexCallback')
-                ? namedArgs['semanticIndexCallback']
-                : _kDefaultSemanticIndexCallback,
-            semanticIndexOffset: namedArgs.containsKey('semanticIndexOffset') ? namedArgs['semanticIndexOffset'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverChildListDelegate(List<Widget>.from(positionalArgs[0]),
+                addAutomaticKeepAlives:
+                    namedArgs.containsKey('addAutomaticKeepAlives')
+                        ? namedArgs['addAutomaticKeepAlives']
+                        : true,
+                addRepaintBoundaries:
+                    namedArgs.containsKey('addRepaintBoundaries')
+                        ? namedArgs['addRepaintBoundaries']
+                        : true,
+                addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes')
+                    ? namedArgs['addSemanticIndexes']
+                    : true,
+                semanticIndexCallback:
+                    namedArgs.containsKey('semanticIndexCallback')
+                        ? namedArgs['semanticIndexCallback']
+                        : _kDefaultSemanticIndexCallback,
+                semanticIndexOffset:
+                    namedArgs.containsKey('semanticIndexOffset')
+                        ? namedArgs['semanticIndexOffset']
+                        : 0);
       case 'SliverChildListDelegate.fixed':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverChildListDelegate.fixed(
-            List<Widget>.from(positionalArgs[0]),
-            addAutomaticKeepAlives:
-                namedArgs.containsKey('addAutomaticKeepAlives') ? namedArgs['addAutomaticKeepAlives'] : true,
-            addRepaintBoundaries:
-                namedArgs.containsKey('addRepaintBoundaries') ? namedArgs['addRepaintBoundaries'] : true,
-            addSemanticIndexes: namedArgs.containsKey('addSemanticIndexes') ? namedArgs['addSemanticIndexes'] : true,
-            semanticIndexCallback: namedArgs.containsKey('semanticIndexCallback')
-                ? namedArgs['semanticIndexCallback']
-                : _kDefaultSemanticIndexCallback,
-            semanticIndexOffset: namedArgs.containsKey('semanticIndexOffset') ? namedArgs['semanticIndexOffset'] : 0);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverChildListDelegate.fixed(
+                List<Widget>.from(positionalArgs[0]),
+                addAutomaticKeepAlives:
+                    namedArgs.containsKey(
+                            'addAutomaticKeepAlives')
+                        ? namedArgs['addAutomaticKeepAlives']
+                        : true,
+                addRepaintBoundaries:
+                    namedArgs.containsKey(
+                            'addRepaintBoundaries')
+                        ? namedArgs['addRepaintBoundaries']
+                        : true,
+                addSemanticIndexes:
+                    namedArgs.containsKey(
+                            'addSemanticIndexes')
+                        ? namedArgs['addSemanticIndexes']
+                        : true,
+                semanticIndexCallback:
+                    namedArgs.containsKey('semanticIndexCallback')
+                        ? namedArgs['semanticIndexCallback']
+                        : _kDefaultSemanticIndexCallback,
+                semanticIndexOffset:
+                    namedArgs.containsKey('semanticIndexOffset')
+                        ? namedArgs['semanticIndexOffset']
+                        : 0);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -130,8 +184,10 @@ class SliverChildListDelegateAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SemanticIndexCallback': (HTFunction function) =>
-          (widget, localIndex) => function.call(positionalArgs: [widget, localIndex], namedArgs: const {}) as int?,
+      'SemanticIndexCallback': (HTFunction function) => (widget, localIndex) =>
+          function.call(
+              positionalArgs: [widget, localIndex],
+              namedArgs: const {}) as int?,
     };
   }
 }
@@ -140,7 +196,7 @@ extension SliverChildListDelegateBinding on SliverChildListDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverChildListDelegate');
+        return const HTType('SliverChildListDelegate');
       case 'addAutomaticKeepAlives':
         return addAutomaticKeepAlives;
       case 'addRepaintBoundaries':
@@ -156,20 +212,25 @@ extension SliverChildListDelegateBinding on SliverChildListDelegate {
       case 'estimatedChildCount':
         return estimatedChildCount;
       case 'findIndexByKey':
-        return ({positionalArgs, namedArgs, typeArgs}) => findIndexByKey(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findIndexByKey(positionalArgs[0]);
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0], positionalArgs[1]);
       case 'shouldRebuild':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRebuild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRebuild(positionalArgs[0]);
       case 'estimateMaxScrollOffset':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3]);
+            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3]);
       case 'didFinishLayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => didFinishLayout(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didFinishLayout(positionalArgs[0], positionalArgs[1]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -181,10 +242,11 @@ class SliverListAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverList':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            SliverList(key: namedArgs.containsKey('key') ? namedArgs['key'] : null, delegate: namedArgs['delegate']);
+        return ({positionalArgs, namedArgs, typeArgs}) => SliverList(
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            delegate: namedArgs['delegate']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -198,7 +260,7 @@ extension SliverListBinding on SliverList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverList');
+        return const HTType('SliverList');
       case 'delegate':
         return delegate;
       case 'key':
@@ -208,32 +270,46 @@ extension SliverListBinding on SliverList {
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'estimateMaxScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => estimateMaxScrollOffset(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3], positionalArgs[4]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -250,7 +326,7 @@ class SliverFixedExtentListAutoBinding extends HTExternalClass {
             delegate: namedArgs['delegate'],
             itemExtent: namedArgs['itemExtent']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -264,7 +340,7 @@ extension SliverFixedExtentListBinding on SliverFixedExtentList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverFixedExtentList');
+        return const HTType('SliverFixedExtentList');
       case 'itemExtent':
         return itemExtent;
       case 'delegate':
@@ -274,36 +350,51 @@ extension SliverFixedExtentListBinding on SliverFixedExtentList {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'estimateMaxScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => estimateMaxScrollOffset(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3], positionalArgs[4]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -323,20 +414,36 @@ class SliverGridAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SliverGrid.count(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             crossAxisCount: namedArgs['crossAxisCount'],
-            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing') ? namedArgs['mainAxisSpacing'] : 0.0,
-            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing') ? namedArgs['crossAxisSpacing'] : 0.0,
-            childAspectRatio: namedArgs.containsKey('childAspectRatio') ? namedArgs['childAspectRatio'] : 1.0,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing')
+                ? namedArgs['mainAxisSpacing']
+                : 0.0,
+            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing')
+                ? namedArgs['crossAxisSpacing']
+                : 0.0,
+            childAspectRatio: namedArgs.containsKey('childAspectRatio')
+                ? namedArgs['childAspectRatio']
+                : 1.0,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       case 'SliverGrid.extent':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverGrid.extent(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             maxCrossAxisExtent: namedArgs['maxCrossAxisExtent'],
-            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing') ? namedArgs['mainAxisSpacing'] : 0.0,
-            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing') ? namedArgs['crossAxisSpacing'] : 0.0,
-            childAspectRatio: namedArgs.containsKey('childAspectRatio') ? namedArgs['childAspectRatio'] : 1.0,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : const <Widget>[]);
+            mainAxisSpacing: namedArgs.containsKey('mainAxisSpacing')
+                ? namedArgs['mainAxisSpacing']
+                : 0.0,
+            crossAxisSpacing: namedArgs.containsKey('crossAxisSpacing')
+                ? namedArgs['crossAxisSpacing']
+                : 0.0,
+            childAspectRatio: namedArgs.containsKey('childAspectRatio')
+                ? namedArgs['childAspectRatio']
+                : 1.0,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -350,7 +457,7 @@ extension SliverGridBinding on SliverGrid {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverGrid');
+        return const HTType('SliverGrid');
       case 'gridDelegate':
         return gridDelegate;
       case 'delegate':
@@ -360,52 +467,71 @@ extension SliverGridBinding on SliverGrid {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'estimateMaxScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => estimateMaxScrollOffset(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3], positionalArgs[4]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class SliverMultiBoxAdaptorElementAutoBinding extends HTExternalClass {
-  SliverMultiBoxAdaptorElementAutoBinding() : super('SliverMultiBoxAdaptorElement');
+  SliverMultiBoxAdaptorElementAutoBinding()
+      : super('SliverMultiBoxAdaptorElement');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverMultiBoxAdaptorElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverMultiBoxAdaptorElement(positionalArgs[0],
-            replaceMovedChildren:
-                namedArgs.containsKey('replaceMovedChildren') ? namedArgs['replaceMovedChildren'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverMultiBoxAdaptorElement(positionalArgs[0],
+                replaceMovedChildren:
+                    namedArgs.containsKey('replaceMovedChildren')
+                        ? namedArgs['replaceMovedChildren']
+                        : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -416,8 +542,8 @@ class SliverMultiBoxAdaptorElementAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'ElementVisitor': (HTFunction function) =>
-          (element) => function.call(positionalArgs: [element], namedArgs: const {}),
+      'ElementVisitor': (HTFunction function) => (element) =>
+          function.call(positionalArgs: [element], namedArgs: const {}),
     };
   }
 }
@@ -426,7 +552,7 @@ extension SliverMultiBoxAdaptorElementBinding on SliverMultiBoxAdaptorElement {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverMultiBoxAdaptorElement');
+        return const HTType('SliverMultiBoxAdaptorElement');
       case 'widget':
         return widget;
       case 'renderObject':
@@ -450,73 +576,108 @@ extension SliverMultiBoxAdaptorElementBinding on SliverMultiBoxAdaptorElement {
       case 'dirty':
         return dirty;
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'performRebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => performRebuild();
       case 'createChild':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            createChild(positionalArgs[0], after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => createChild(
+            positionalArgs[0],
+            after: namedArgs.containsKey('after') ? namedArgs['after'] : null);
       case 'updateChild':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            updateChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+        return ({positionalArgs, namedArgs, typeArgs}) => updateChild(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'forgetChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => forgetChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            forgetChild(positionalArgs[0]);
       case 'removeChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeChild(positionalArgs[0]);
       case 'estimateMaxScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => estimateMaxScrollOffset(positionalArgs[0],
-            firstIndex: namedArgs.containsKey('firstIndex') ? namedArgs['firstIndex'] : null,
-            lastIndex: namedArgs.containsKey('lastIndex') ? namedArgs['lastIndex'] : null,
-            leadingScrollOffset: namedArgs.containsKey('leadingScrollOffset') ? namedArgs['leadingScrollOffset'] : null,
-            trailingScrollOffset:
-                namedArgs.containsKey('trailingScrollOffset') ? namedArgs['trailingScrollOffset'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            estimateMaxScrollOffset(positionalArgs[0],
+                firstIndex: namedArgs.containsKey('firstIndex')
+                    ? namedArgs['firstIndex']
+                    : null,
+                lastIndex: namedArgs.containsKey('lastIndex')
+                    ? namedArgs['lastIndex']
+                    : null,
+                leadingScrollOffset:
+                    namedArgs.containsKey('leadingScrollOffset')
+                        ? namedArgs['leadingScrollOffset']
+                        : null,
+                trailingScrollOffset:
+                    namedArgs.containsKey('trailingScrollOffset')
+                        ? namedArgs['trailingScrollOffset']
+                        : null);
       case 'didStartLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => didStartLayout();
       case 'didFinishLayout':
         return ({positionalArgs, namedArgs, typeArgs}) => didFinishLayout();
       case 'debugAssertChildListLocked':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugAssertChildListLocked();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugAssertChildListLocked();
       case 'didAdoptChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => didAdoptChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didAdoptChild(positionalArgs[0]);
       case 'setDidUnderflow':
-        return ({positionalArgs, namedArgs, typeArgs}) => setDidUnderflow(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            setDidUnderflow(positionalArgs[0]);
       case 'insertRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
-      case 'moveRenderObjectChild':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            moveRenderObjectChild(positionalArgs[0], positionalArgs[1], positionalArgs[2]);
+            insertRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+      case 'moveRenderObjectChild':
+        return ({positionalArgs, namedArgs, typeArgs}) => moveRenderObjectChild(
+            positionalArgs[0], positionalArgs[1], positionalArgs[2]);
       case 'removeRenderObjectChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeRenderObjectChild(positionalArgs[0], positionalArgs[1]);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'debugVisitOnstageChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugVisitOnstageChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugVisitOnstageChildren(positionalArgs[0]);
       case 'mount':
-        return ({positionalArgs, namedArgs, typeArgs}) => mount(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            mount(positionalArgs[0], positionalArgs[1]);
       case 'deactivate':
         return ({positionalArgs, namedArgs, typeArgs}) => deactivate();
       case 'unmount':
         return ({positionalArgs, namedArgs, typeArgs}) => unmount();
       case 'attachRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => attachRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            attachRenderObject(positionalArgs[0]);
       case 'detachRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => detachRenderObject();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'describeMissingAncestor':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeMissingAncestor(
-            expectedAncestorType:
-                namedArgs.containsKey('expectedAncestorType') ? namedArgs['expectedAncestorType'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeMissingAncestor(
+                expectedAncestorType:
+                    namedArgs.containsKey('expectedAncestorType')
+                        ? namedArgs['expectedAncestorType']
+                        : null);
       case 'describeElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeElement(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeWidget':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(positionalArgs[0],
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : DiagnosticsTreeStyle.errorProperty);
+        return ({positionalArgs, namedArgs, typeArgs}) => describeWidget(
+            positionalArgs[0],
+            style: namedArgs.containsKey('style')
+                ? namedArgs['style']
+                : DiagnosticsTreeStyle.errorProperty);
       case 'describeOwnershipChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => describeOwnershipChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            describeOwnershipChain(positionalArgs[0]);
       case 'visitChildElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildElements(positionalArgs[0]);
       case 'activate':
         return ({positionalArgs, namedArgs, typeArgs}) => activate();
       case 'debugDeactivated':
@@ -524,29 +685,44 @@ extension SliverMultiBoxAdaptorElementBinding on SliverMultiBoxAdaptorElement {
       case 'findRenderObject':
         return ({positionalArgs, namedArgs, typeArgs}) => findRenderObject();
       case 'dependOnInheritedElement':
-        return ({positionalArgs, namedArgs, typeArgs}) => dependOnInheritedElement(positionalArgs[0],
-            aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            dependOnInheritedElement(positionalArgs[0],
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'dependOnInheritedWidgetOfExactType':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            dependOnInheritedWidgetOfExactType(aspect: namedArgs.containsKey('aspect') ? namedArgs['aspect'] : null);
+            dependOnInheritedWidgetOfExactType(
+                aspect: namedArgs.containsKey('aspect')
+                    ? namedArgs['aspect']
+                    : null);
       case 'getElementForInheritedWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => getElementForInheritedWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getElementForInheritedWidgetOfExactType();
       case 'findAncestorWidgetOfExactType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorWidgetOfExactType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorWidgetOfExactType();
       case 'findAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorStateOfType();
       case 'findRootAncestorStateOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findRootAncestorStateOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findRootAncestorStateOfType();
       case 'findAncestorRenderObjectOfType':
-        return ({positionalArgs, namedArgs, typeArgs}) => findAncestorRenderObjectOfType();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            findAncestorRenderObjectOfType();
       case 'visitAncestorElements':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitAncestorElements(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitAncestorElements(positionalArgs[0]);
       case 'didChangeDependencies':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeDependencies();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeDependencies();
       case 'debugGetCreatorChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetCreatorChain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetCreatorChain(positionalArgs[0]);
       case 'debugGetDiagnosticChain':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugGetDiagnosticChain();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugGetDiagnosticChain();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -554,25 +730,37 @@ extension SliverMultiBoxAdaptorElementBinding on SliverMultiBoxAdaptorElement {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'debugDescribeChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugDescribeChildren();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugDescribeChildren();
       case 'markNeedsBuild':
         return ({positionalArgs, namedArgs, typeArgs}) => markNeedsBuild();
       case 'rebuild':
         return ({positionalArgs, namedArgs, typeArgs}) => rebuild();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -588,10 +776,13 @@ class SliverOpacityAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             opacity: namedArgs['opacity'],
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false,
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -605,7 +796,7 @@ extension SliverOpacityBinding on SliverOpacity {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverOpacity');
+        return const HTType('SliverOpacity');
       case 'opacity':
         return opacity;
       case 'alwaysIncludeSemantics':
@@ -617,33 +808,47 @@ extension SliverOpacityBinding on SliverOpacity {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -657,11 +862,16 @@ class SliverIgnorePointerAutoBinding extends HTExternalClass {
       case 'SliverIgnorePointer':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverIgnorePointer(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            ignoring: namedArgs.containsKey('ignoring') ? namedArgs['ignoring'] : true,
-            ignoringSemantics: namedArgs.containsKey('ignoringSemantics') ? namedArgs['ignoringSemantics'] : null,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+            ignoring: namedArgs.containsKey('ignoring')
+                ? namedArgs['ignoring']
+                : true,
+            ignoringSemantics: namedArgs.containsKey('ignoringSemantics')
+                ? namedArgs['ignoringSemantics']
+                : null,
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -675,7 +885,7 @@ extension SliverIgnorePointerBinding on SliverIgnorePointer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverIgnorePointer');
+        return const HTType('SliverIgnorePointer');
       case 'ignoring':
         return ignoring;
       case 'ignoringSemantics':
@@ -687,33 +897,47 @@ extension SliverIgnorePointerBinding on SliverIgnorePointer {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -727,10 +951,13 @@ class SliverOffstageAutoBinding extends HTExternalClass {
       case 'SliverOffstage':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverOffstage(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            offstage: namedArgs.containsKey('offstage') ? namedArgs['offstage'] : true,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+            offstage: namedArgs.containsKey('offstage')
+                ? namedArgs['offstage']
+                : true,
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -744,7 +971,7 @@ extension SliverOffstageBinding on SliverOffstage {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverOffstage');
+        return const HTType('SliverOffstage');
       case 'offstage':
         return offstage;
       case 'child':
@@ -754,33 +981,47 @@ extension SliverOffstageBinding on SliverOffstage {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -797,7 +1038,7 @@ class KeepAliveAutoBinding extends HTExternalClass {
             keepAlive: namedArgs['keepAlive'],
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -811,7 +1052,7 @@ extension KeepAliveBinding on KeepAlive {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('KeepAlive');
+        return const HTType('KeepAlive');
       case 'keepAlive':
         return keepAlive;
       case 'child':
@@ -823,35 +1064,50 @@ extension KeepAliveBinding on KeepAlive {
       case 'hashCode':
         return hashCode;
       case 'applyParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyParentData(positionalArgs[0]);
       case 'debugCanApplyOutOfTurn':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugCanApplyOutOfTurn();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugCanApplyOutOfTurn();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugIsValidRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugIsValidRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugIsValidRenderObject(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/sliver_fill.g.dart b/lib/bindings/flutter/widgets/sliver_fill.g.dart
index c2fe305..e30623d 100644
--- a/lib/bindings/flutter/widgets/sliver_fill.g.dart
+++ b/lib/bindings/flutter/widgets/sliver_fill.g.dart
@@ -13,10 +13,13 @@ class SliverFillViewportAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SliverFillViewport(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             delegate: namedArgs['delegate'],
-            viewportFraction: namedArgs.containsKey('viewportFraction') ? namedArgs['viewportFraction'] : 1.0,
-            padEnds: namedArgs.containsKey('padEnds') ? namedArgs['padEnds'] : true);
+            viewportFraction: namedArgs.containsKey('viewportFraction')
+                ? namedArgs['viewportFraction']
+                : 1.0,
+            padEnds:
+                namedArgs.containsKey('padEnds') ? namedArgs['padEnds'] : true);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +33,7 @@ extension SliverFillViewportBinding on SliverFillViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverFillViewport');
+        return const HTType('SliverFillViewport');
       case 'viewportFraction':
         return viewportFraction;
       case 'padEnds':
@@ -42,31 +45,44 @@ extension SliverFillViewportBinding on SliverFillViewport {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -81,10 +97,14 @@ class SliverFillRemainingAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SliverFillRemaining(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null,
-            hasScrollBody: namedArgs.containsKey('hasScrollBody') ? namedArgs['hasScrollBody'] : true,
-            fillOverscroll: namedArgs.containsKey('fillOverscroll') ? namedArgs['fillOverscroll'] : false);
+            hasScrollBody: namedArgs.containsKey('hasScrollBody')
+                ? namedArgs['hasScrollBody']
+                : true,
+            fillOverscroll: namedArgs.containsKey('fillOverscroll')
+                ? namedArgs['fillOverscroll']
+                : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -98,7 +118,7 @@ extension SliverFillRemainingBinding on SliverFillRemaining {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverFillRemaining');
+        return const HTType('SliverFillRemaining');
       case 'child':
         return child;
       case 'hasScrollBody':
@@ -110,31 +130,44 @@ extension SliverFillRemainingBinding on SliverFillRemaining {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/sliver_layout_builder.g.dart b/lib/bindings/flutter/widgets/sliver_layout_builder.g.dart
index 1e9c6b2..f86ae94 100644
--- a/lib/bindings/flutter/widgets/sliver_layout_builder.g.dart
+++ b/lib/bindings/flutter/widgets/sliver_layout_builder.g.dart
@@ -10,9 +10,10 @@ class SliverLayoutBuilderAutoBinding extends HTExternalClass {
     switch (varName) {
       case 'SliverLayoutBuilder':
         return ({positionalArgs, namedArgs, typeArgs}) => SliverLayoutBuilder(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null, builder: namedArgs['builder']);
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+            builder: namedArgs['builder']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,8 +24,10 @@ class SliverLayoutBuilderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'SliverLayoutWidgetBuilder': (HTFunction function) => (context, constraints) =>
-          function.call(positionalArgs: [context, constraints], namedArgs: const {}) as Widget,
+      'SliverLayoutWidgetBuilder': (HTFunction function) =>
+          (context, constraints) => function.call(
+              positionalArgs: [context, constraints],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -33,7 +36,7 @@ extension SliverLayoutBuilderBinding on SliverLayoutBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverLayoutBuilder');
+        return const HTType('SliverLayoutBuilder');
       case 'key':
         return key;
       case 'builder':
@@ -41,31 +44,44 @@ extension SliverLayoutBuilderBinding on SliverLayoutBuilder {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/sliver_persistent_header.g.dart b/lib/bindings/flutter/widgets/sliver_persistent_header.g.dart
index 3af29fb..b8179bd 100644
--- a/lib/bindings/flutter/widgets/sliver_persistent_header.g.dart
+++ b/lib/bindings/flutter/widgets/sliver_persistent_header.g.dart
@@ -10,13 +10,18 @@ class SliverPersistentHeaderAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverPersistentHeader':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverPersistentHeader(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            delegate: namedArgs['delegate'],
-            pinned: namedArgs.containsKey('pinned') ? namedArgs['pinned'] : false,
-            floating: namedArgs.containsKey('floating') ? namedArgs['floating'] : false);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverPersistentHeader(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                delegate: namedArgs['delegate'],
+                pinned: namedArgs.containsKey('pinned')
+                    ? namedArgs['pinned']
+                    : false,
+                floating: namedArgs.containsKey('floating')
+                    ? namedArgs['floating']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +35,7 @@ extension SliverPersistentHeaderBinding on SliverPersistentHeader {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverPersistentHeader');
+        return const HTType('SliverPersistentHeader');
       case 'delegate':
         return delegate;
       case 'pinned':
@@ -42,31 +47,44 @@ extension SliverPersistentHeaderBinding on SliverPersistentHeader {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/sliver_prototype_extent_list.g.dart b/lib/bindings/flutter/widgets/sliver_prototype_extent_list.g.dart
index e7af6d4..e6b2480 100644
--- a/lib/bindings/flutter/widgets/sliver_prototype_extent_list.g.dart
+++ b/lib/bindings/flutter/widgets/sliver_prototype_extent_list.g.dart
@@ -9,12 +9,13 @@ class SliverPrototypeExtentListAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'SliverPrototypeExtentList':
-        return ({positionalArgs, namedArgs, typeArgs}) => SliverPrototypeExtentList(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            delegate: namedArgs['delegate'],
-            prototypeItem: namedArgs['prototypeItem']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            SliverPrototypeExtentList(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                delegate: namedArgs['delegate'],
+                prototypeItem: namedArgs['prototypeItem']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +29,7 @@ extension SliverPrototypeExtentListBinding on SliverPrototypeExtentList {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverPrototypeExtentList');
+        return const HTType('SliverPrototypeExtentList');
       case 'prototypeItem':
         return prototypeItem;
       case 'delegate':
@@ -38,34 +39,48 @@ extension SliverPrototypeExtentListBinding on SliverPrototypeExtentList {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'estimateMaxScrollOffset':
-        return ({positionalArgs, namedArgs, typeArgs}) => estimateMaxScrollOffset(
-            positionalArgs[0], positionalArgs[1], positionalArgs[2], positionalArgs[3], positionalArgs[4]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            estimateMaxScrollOffset(positionalArgs[0], positionalArgs[1],
+                positionalArgs[2], positionalArgs[3], positionalArgs[4]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/spacer.g.dart b/lib/bindings/flutter/widgets/spacer.g.dart
index 697d557..053865f 100644
--- a/lib/bindings/flutter/widgets/spacer.g.dart
+++ b/lib/bindings/flutter/widgets/spacer.g.dart
@@ -12,7 +12,7 @@ class SpacerAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             flex: namedArgs.containsKey('flex') ? namedArgs['flex'] : 1);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -26,7 +26,7 @@ extension SpacerBinding on Spacer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Spacer');
+        return const HTType('Spacer');
       case 'flex':
         return flex;
       case 'key':
@@ -34,31 +34,44 @@ extension SpacerBinding on Spacer {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/table.g.dart b/lib/bindings/flutter/widgets/table.g.dart
index 780d21e..fb014e6 100644
--- a/lib/bindings/flutter/widgets/table.g.dart
+++ b/lib/bindings/flutter/widgets/table.g.dart
@@ -12,10 +12,14 @@ class TableRowAutoBinding extends HTExternalClass {
       case 'TableRow':
         return ({positionalArgs, namedArgs, typeArgs}) => TableRow(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            decoration: namedArgs.containsKey('decoration') ? namedArgs['decoration'] : null,
-            children: namedArgs.containsKey('children') ? List<Widget>.from(namedArgs['children']) : null);
+            decoration: namedArgs.containsKey('decoration')
+                ? namedArgs['decoration']
+                : null,
+            children: namedArgs.containsKey('children')
+                ? List<Widget>.from(namedArgs['children'])
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +33,7 @@ extension TableRowBinding on TableRow {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TableRow');
+        return const HTType('TableRow');
       case 'key':
         return key;
       case 'decoration':
@@ -39,7 +43,7 @@ extension TableRowBinding on TableRow {
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -53,20 +57,29 @@ class TableAutoBinding extends HTExternalClass {
       case 'Table':
         return ({positionalArgs, namedArgs, typeArgs}) => Table(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            children:
-                namedArgs.containsKey('children') ? List<TableRow>.from(namedArgs['children']) : const <TableRow>[],
-            columnWidths: namedArgs.containsKey('columnWidths') ? namedArgs['columnWidths'] : null,
+            children: namedArgs.containsKey('children')
+                ? List<TableRow>.from(namedArgs['children'])
+                : const <TableRow>[],
+            columnWidths: namedArgs.containsKey('columnWidths')
+                ? namedArgs['columnWidths']
+                : null,
             defaultColumnWidth: namedArgs.containsKey('defaultColumnWidth')
                 ? namedArgs['defaultColumnWidth']
                 : const FlexColumnWidth(1.0),
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            border: namedArgs.containsKey('border') ? namedArgs['border'] : null,
-            defaultVerticalAlignment: namedArgs.containsKey('defaultVerticalAlignment')
-                ? namedArgs['defaultVerticalAlignment']
-                : TableCellVerticalAlignment.top,
-            textBaseline: namedArgs.containsKey('textBaseline') ? namedArgs['textBaseline'] : null);
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            border:
+                namedArgs.containsKey('border') ? namedArgs['border'] : null,
+            defaultVerticalAlignment:
+                namedArgs.containsKey('defaultVerticalAlignment')
+                    ? namedArgs['defaultVerticalAlignment']
+                    : TableCellVerticalAlignment.top,
+            textBaseline: namedArgs.containsKey('textBaseline')
+                ? namedArgs['textBaseline']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -80,7 +93,7 @@ extension TableBinding on Table {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Table');
+        return const HTType('Table');
       case 'children':
         return children;
       case 'columnWidths':
@@ -102,31 +115,45 @@ extension TableBinding on Table {
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -140,10 +167,12 @@ class TableCellAutoBinding extends HTExternalClass {
       case 'TableCell':
         return ({positionalArgs, namedArgs, typeArgs}) => TableCell(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            verticalAlignment: namedArgs.containsKey('verticalAlignment') ? namedArgs['verticalAlignment'] : null,
+            verticalAlignment: namedArgs.containsKey('verticalAlignment')
+                ? namedArgs['verticalAlignment']
+                : null,
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -157,7 +186,7 @@ extension TableCellBinding on TableCell {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TableCell');
+        return const HTType('TableCell');
       case 'verticalAlignment':
         return verticalAlignment;
       case 'child':
@@ -169,33 +198,47 @@ extension TableCellBinding on TableCell {
       case 'hashCode':
         return hashCode;
       case 'applyParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => applyParentData(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            applyParentData(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugIsValidRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugIsValidRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugIsValidRenderObject(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/text.g.dart b/lib/bindings/flutter/widgets/text.g.dart
index c7cddd6..2af887a 100644
--- a/lib/bindings/flutter/widgets/text.g.dart
+++ b/lib/bindings/flutter/widgets/text.g.dart
@@ -12,31 +12,57 @@ class DefaultTextStyleAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => DefaultTextStyle(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             style: namedArgs['style'],
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : true,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : TextOverflow.clip,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            textWidthBasis:
-                namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : TextWidthBasis.parent,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            softWrap: namedArgs.containsKey('softWrap')
+                ? namedArgs['softWrap']
+                : true,
+            overflow: namedArgs.containsKey('overflow')
+                ? namedArgs['overflow']
+                : TextOverflow.clip,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : TextWidthBasis.parent,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null,
             child: namedArgs['child']);
       case 'DefaultTextStyle.fallback':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            DefaultTextStyle.fallback(key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
+            DefaultTextStyle.fallback(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
       case 'DefaultTextStyle.merge':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultTextStyle.merge(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : null,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            textWidthBasis: namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : null,
-            child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultTextStyle.merge(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                style:
+                    namedArgs.containsKey('style') ? namedArgs['style'] : null,
+                textAlign: namedArgs.containsKey('textAlign')
+                    ? namedArgs['textAlign']
+                    : null,
+                softWrap: namedArgs.containsKey('softWrap')
+                    ? namedArgs['softWrap']
+                    : null,
+                overflow: namedArgs.containsKey('overflow')
+                    ? namedArgs['overflow']
+                    : null,
+                maxLines: namedArgs.containsKey('maxLines')
+                    ? namedArgs['maxLines']
+                    : null,
+                textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                    ? namedArgs['textWidthBasis']
+                    : null,
+                child:
+                    namedArgs.containsKey('child') ? namedArgs['child'] : null);
       case 'DefaultTextStyle.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultTextStyle.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultTextStyle.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -50,7 +76,7 @@ extension DefaultTextStyleBinding on DefaultTextStyle {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultTextStyle');
+        return const HTType('DefaultTextStyle');
       case 'style':
         return style;
       case 'textAlign':
@@ -72,33 +98,47 @@ extension DefaultTextStyleBinding on DefaultTextStyle {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -110,14 +150,16 @@ class DefaultTextHeightBehaviorAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DefaultTextHeightBehavior':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultTextHeightBehavior(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            textHeightBehavior: namedArgs['textHeightBehavior'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultTextHeightBehavior(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                textHeightBehavior: namedArgs['textHeightBehavior'],
+                child: namedArgs['child']);
       case 'DefaultTextHeightBehavior.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultTextHeightBehavior.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultTextHeightBehavior.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -131,7 +173,7 @@ extension DefaultTextHeightBehaviorBinding on DefaultTextHeightBehavior {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultTextHeightBehavior');
+        return const HTType('DefaultTextHeightBehavior');
       case 'textHeightBehavior':
         return textHeightBehavior;
       case 'child':
@@ -141,33 +183,47 @@ extension DefaultTextHeightBehaviorBinding on DefaultTextHeightBehavior {
       case 'hashCode':
         return hashCode;
       case 'updateShouldNotify':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateShouldNotify(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateShouldNotify(positionalArgs[0]);
       case 'wrap':
-        return ({positionalArgs, namedArgs, typeArgs}) => wrap(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            wrap(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -179,37 +235,81 @@ class TextAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'Text':
-        return ({positionalArgs, namedArgs, typeArgs}) => Text(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => Text(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : null,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            textWidthBasis: namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : null,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null);
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            softWrap: namedArgs.containsKey('softWrap')
+                ? namedArgs['softWrap']
+                : null,
+            overflow: namedArgs.containsKey('overflow')
+                ? namedArgs['overflow']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                ? namedArgs['semanticsLabel']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : null,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null);
       case 'Text.rich':
-        return ({positionalArgs, namedArgs, typeArgs}) => Text.rich(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => Text.rich(
+            positionalArgs[0],
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null,
-            strutStyle: namedArgs.containsKey('strutStyle') ? namedArgs['strutStyle'] : null,
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
-            locale: namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : null,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : null,
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : null,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null,
-            semanticsLabel: namedArgs.containsKey('semanticsLabel') ? namedArgs['semanticsLabel'] : null,
-            textWidthBasis: namedArgs.containsKey('textWidthBasis') ? namedArgs['textWidthBasis'] : null,
-            textHeightBehavior: namedArgs.containsKey('textHeightBehavior') ? namedArgs['textHeightBehavior'] : null);
+            strutStyle: namedArgs.containsKey('strutStyle')
+                ? namedArgs['strutStyle']
+                : null,
+            textAlign: namedArgs.containsKey('textAlign')
+                ? namedArgs['textAlign']
+                : null,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
+            locale:
+                namedArgs.containsKey('locale') ? namedArgs['locale'] : null,
+            softWrap: namedArgs.containsKey('softWrap')
+                ? namedArgs['softWrap']
+                : null,
+            overflow: namedArgs.containsKey('overflow')
+                ? namedArgs['overflow']
+                : null,
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : null,
+            maxLines: namedArgs.containsKey('maxLines')
+                ? namedArgs['maxLines']
+                : null,
+            semanticsLabel: namedArgs.containsKey('semanticsLabel')
+                ? namedArgs['semanticsLabel']
+                : null,
+            textWidthBasis: namedArgs.containsKey('textWidthBasis')
+                ? namedArgs['textWidthBasis']
+                : null,
+            textHeightBehavior: namedArgs.containsKey('textHeightBehavior')
+                ? namedArgs['textHeightBehavior']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -223,7 +323,7 @@ extension TextBinding on Text {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Text');
+        return const HTType('Text');
       case 'data':
         return data;
       case 'textSpan':
@@ -257,31 +357,44 @@ extension TextBinding on Text {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/text_selection.g.dart b/lib/bindings/flutter/widgets/text_selection.g.dart
index 2b00e82..f055b8b 100644
--- a/lib/bindings/flutter/widgets/text_selection.g.dart
+++ b/lib/bindings/flutter/widgets/text_selection.g.dart
@@ -19,7 +19,7 @@ class TextSelectionHandleTypeAutoBinding extends HTExternalClass {
       case 'TextSelectionHandleType.collapsed':
         return TextSelectionHandleType.collapsed;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +27,14 @@ class TextSelectionHandleTypeAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionHandleType');
+        return const HTType('TextSelectionHandleType');
       case 'index':
         return (instance as TextSelectionHandleType).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as TextSelectionHandleType).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as TextSelectionHandleType).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -53,7 +54,7 @@ class ClipboardStatusAutoBinding extends HTExternalClass {
       case 'ClipboardStatus.notPasteable':
         return ClipboardStatus.notPasteable;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -61,13 +62,14 @@ class ClipboardStatusAutoBinding extends HTExternalClass {
   dynamic instanceMemberGet(dynamic instance, String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipboardStatus');
+        return const HTType('ClipboardStatus');
       case 'index':
         return (instance as ClipboardStatus).index;
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) => (instance as ClipboardStatus).toString();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            (instance as ClipboardStatus).toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -79,9 +81,10 @@ class ToolbarItemsParentDataAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ToolbarItemsParentData':
-        return ({positionalArgs, namedArgs, typeArgs}) => ToolbarItemsParentData();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ToolbarItemsParentData();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -100,7 +103,7 @@ extension ToolbarItemsParentDataBinding on ToolbarItemsParentData {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ToolbarItemsParentData');
+        return const HTType('ToolbarItemsParentData');
       case 'shouldPaint':
         return shouldPaint;
       case 'offset':
@@ -110,7 +113,7 @@ extension ToolbarItemsParentDataBinding on ToolbarItemsParentData {
       case 'detach':
         return ({positionalArgs, namedArgs, typeArgs}) => detach();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -123,7 +126,7 @@ extension ToolbarItemsParentDataBinding on ToolbarItemsParentData {
         offset = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -138,23 +141,36 @@ class TextSelectionOverlayAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => TextSelectionOverlay(
             value: namedArgs['value'],
             context: namedArgs['context'],
-            debugRequiredFor: namedArgs.containsKey('debugRequiredFor') ? namedArgs['debugRequiredFor'] : null,
+            debugRequiredFor: namedArgs.containsKey('debugRequiredFor')
+                ? namedArgs['debugRequiredFor']
+                : null,
             toolbarLayerLink: namedArgs['toolbarLayerLink'],
             startHandleLayerLink: namedArgs['startHandleLayerLink'],
             endHandleLayerLink: namedArgs['endHandleLayerLink'],
             renderObject: namedArgs['renderObject'],
-            selectionControls: namedArgs.containsKey('selectionControls') ? namedArgs['selectionControls'] : null,
-            handlesVisible: namedArgs.containsKey('handlesVisible') ? namedArgs['handlesVisible'] : false,
-            selectionDelegate: namedArgs.containsKey('selectionDelegate') ? namedArgs['selectionDelegate'] : null,
-            dragStartBehavior:
-                namedArgs.containsKey('dragStartBehavior') ? namedArgs['dragStartBehavior'] : DragStartBehavior.start,
+            selectionControls: namedArgs.containsKey('selectionControls')
+                ? namedArgs['selectionControls']
+                : null,
+            handlesVisible: namedArgs.containsKey('handlesVisible')
+                ? namedArgs['handlesVisible']
+                : false,
+            selectionDelegate: namedArgs.containsKey('selectionDelegate')
+                ? namedArgs['selectionDelegate']
+                : null,
+            dragStartBehavior: namedArgs.containsKey('dragStartBehavior')
+                ? namedArgs['dragStartBehavior']
+                : DragStartBehavior.start,
             onSelectionHandleTapped:
-                namedArgs.containsKey('onSelectionHandleTapped') ? namedArgs['onSelectionHandleTapped'] : null,
-            clipboardStatus: namedArgs.containsKey('clipboardStatus') ? namedArgs['clipboardStatus'] : null);
+                namedArgs.containsKey('onSelectionHandleTapped')
+                    ? namedArgs['onSelectionHandleTapped']
+                    : null,
+            clipboardStatus: namedArgs.containsKey('clipboardStatus')
+                ? namedArgs['clipboardStatus']
+                : null);
       case 'TextSelectionOverlay.fadeDuration':
         return TextSelectionOverlay.fadeDuration;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -170,7 +186,8 @@ class TextSelectionOverlayAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -179,7 +196,7 @@ extension TextSelectionOverlayBinding on TextSelectionOverlay {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionOverlay');
+        return const HTType('TextSelectionOverlay');
       case 'context':
         return context;
       case 'debugRequiredFor':
@@ -215,7 +232,8 @@ extension TextSelectionOverlayBinding on TextSelectionOverlay {
       case 'showToolbar':
         return ({positionalArgs, namedArgs, typeArgs}) => showToolbar();
       case 'update':
-        return ({positionalArgs, namedArgs, typeArgs}) => update(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            update(positionalArgs[0]);
       case 'updateForScroll':
         return ({positionalArgs, namedArgs, typeArgs}) => updateForScroll();
       case 'hide':
@@ -225,7 +243,7 @@ extension TextSelectionOverlayBinding on TextSelectionOverlay {
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -235,22 +253,24 @@ extension TextSelectionOverlayBinding on TextSelectionOverlay {
         handlesVisible = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class TextSelectionGestureDetectorBuilderAutoBinding extends HTExternalClass {
-  TextSelectionGestureDetectorBuilderAutoBinding() : super('TextSelectionGestureDetectorBuilder');
+  TextSelectionGestureDetectorBuilderAutoBinding()
+      : super('TextSelectionGestureDetectorBuilder');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextSelectionGestureDetectorBuilder':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            TextSelectionGestureDetectorBuilder(delegate: namedArgs['delegate']);
+            TextSelectionGestureDetectorBuilder(
+                delegate: namedArgs['delegate']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -260,55 +280,88 @@ class TextSelectionGestureDetectorBuilderAutoBinding extends HTExternalClass {
   }
 }
 
-extension TextSelectionGestureDetectorBuilderBinding on TextSelectionGestureDetectorBuilder {
+extension TextSelectionGestureDetectorBuilderBinding
+    on TextSelectionGestureDetectorBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionGestureDetectorBuilder');
+        return const HTType('TextSelectionGestureDetectorBuilder');
       case 'shouldShowSelectionToolbar':
         return shouldShowSelectionToolbar;
       case 'buildGestureDetector':
         return ({positionalArgs, namedArgs, typeArgs}) => buildGestureDetector(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : null,
+            behavior: namedArgs.containsKey('behavior')
+                ? namedArgs['behavior']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class TextSelectionGestureDetectorAutoBinding extends HTExternalClass {
-  TextSelectionGestureDetectorAutoBinding() : super('TextSelectionGestureDetector');
+  TextSelectionGestureDetectorAutoBinding()
+      : super('TextSelectionGestureDetector');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextSelectionGestureDetector':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelectionGestureDetector(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            onTapDown: namedArgs.containsKey('onTapDown') ? namedArgs['onTapDown'] : null,
-            onForcePressStart: namedArgs.containsKey('onForcePressStart') ? namedArgs['onForcePressStart'] : null,
-            onForcePressEnd: namedArgs.containsKey('onForcePressEnd') ? namedArgs['onForcePressEnd'] : null,
-            onSecondaryTap: namedArgs.containsKey('onSecondaryTap') ? namedArgs['onSecondaryTap'] : null,
-            onSecondaryTapDown: namedArgs.containsKey('onSecondaryTapDown') ? namedArgs['onSecondaryTapDown'] : null,
-            onSingleTapUp: namedArgs.containsKey('onSingleTapUp') ? namedArgs['onSingleTapUp'] : null,
-            onSingleTapCancel: namedArgs.containsKey('onSingleTapCancel') ? namedArgs['onSingleTapCancel'] : null,
-            onSingleLongTapStart:
-                namedArgs.containsKey('onSingleLongTapStart') ? namedArgs['onSingleLongTapStart'] : null,
-            onSingleLongTapMoveUpdate:
-                namedArgs.containsKey('onSingleLongTapMoveUpdate') ? namedArgs['onSingleLongTapMoveUpdate'] : null,
-            onSingleLongTapEnd: namedArgs.containsKey('onSingleLongTapEnd') ? namedArgs['onSingleLongTapEnd'] : null,
-            onDoubleTapDown: namedArgs.containsKey('onDoubleTapDown') ? namedArgs['onDoubleTapDown'] : null,
-            onDragSelectionStart:
-                namedArgs.containsKey('onDragSelectionStart') ? namedArgs['onDragSelectionStart'] : null,
-            onDragSelectionUpdate:
-                namedArgs.containsKey('onDragSelectionUpdate') ? namedArgs['onDragSelectionUpdate'] : null,
-            onDragSelectionEnd: namedArgs.containsKey('onDragSelectionEnd') ? namedArgs['onDragSelectionEnd'] : null,
-            behavior: namedArgs.containsKey('behavior') ? namedArgs['behavior'] : null,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelectionGestureDetector(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                onTapDown: namedArgs.containsKey('onTapDown')
+                    ? namedArgs['onTapDown']
+                    : null,
+                onForcePressStart: namedArgs.containsKey('onForcePressStart')
+                    ? namedArgs['onForcePressStart']
+                    : null,
+                onForcePressEnd: namedArgs.containsKey('onForcePressEnd')
+                    ? namedArgs['onForcePressEnd']
+                    : null,
+                onSecondaryTap: namedArgs.containsKey('onSecondaryTap')
+                    ? namedArgs['onSecondaryTap']
+                    : null,
+                onSecondaryTapDown: namedArgs.containsKey('onSecondaryTapDown')
+                    ? namedArgs['onSecondaryTapDown']
+                    : null,
+                onSingleTapUp: namedArgs.containsKey('onSingleTapUp')
+                    ? namedArgs['onSingleTapUp']
+                    : null,
+                onSingleTapCancel: namedArgs.containsKey('onSingleTapCancel')
+                    ? namedArgs['onSingleTapCancel']
+                    : null,
+                onSingleLongTapStart: namedArgs.containsKey('onSingleLongTapStart')
+                    ? namedArgs['onSingleLongTapStart']
+                    : null,
+                onSingleLongTapMoveUpdate:
+                    namedArgs.containsKey('onSingleLongTapMoveUpdate')
+                        ? namedArgs['onSingleLongTapMoveUpdate']
+                        : null,
+                onSingleLongTapEnd: namedArgs.containsKey('onSingleLongTapEnd')
+                    ? namedArgs['onSingleLongTapEnd']
+                    : null,
+                onDoubleTapDown: namedArgs.containsKey('onDoubleTapDown')
+                    ? namedArgs['onDoubleTapDown']
+                    : null,
+                onDragSelectionStart: namedArgs.containsKey('onDragSelectionStart')
+                    ? namedArgs['onDragSelectionStart']
+                    : null,
+                onDragSelectionUpdate:
+                    namedArgs.containsKey('onDragSelectionUpdate')
+                        ? namedArgs['onDragSelectionUpdate']
+                        : null,
+                onDragSelectionEnd: namedArgs.containsKey('onDragSelectionEnd')
+                    ? namedArgs['onDragSelectionEnd']
+                    : null,
+                behavior: namedArgs.containsKey('behavior')
+                    ? namedArgs['behavior']
+                    : null,
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -319,29 +372,33 @@ class TextSelectionGestureDetectorAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'GestureTapDownCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureForcePressStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureForcePressEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureTapCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureTapUpCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureTapDownCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureForcePressStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureForcePressEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureTapCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'GestureTapUpCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
       'GestureTapCancelCallback': (HTFunction function) =>
           () => function.call(positionalArgs: const [], namedArgs: const {}),
-      'GestureLongPressStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureLongPressStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
       'GestureLongPressMoveUpdateCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureLongPressEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'GestureDragStartCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
-      'DragSelectionUpdateCallback': (HTFunction function) => (startDetails, updateDetails) =>
-          function.call(positionalArgs: [startDetails, updateDetails], namedArgs: const {}),
-      'GestureDragEndCallback': (HTFunction function) =>
-          (details) => function.call(positionalArgs: [details], namedArgs: const {}),
+          (details) =>
+              function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureLongPressEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'GestureDragStartCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
+      'DragSelectionUpdateCallback': (HTFunction function) =>
+          (startDetails, updateDetails) => function.call(
+              positionalArgs: [startDetails, updateDetails],
+              namedArgs: const {}),
+      'GestureDragEndCallback': (HTFunction function) => (details) =>
+          function.call(positionalArgs: [details], namedArgs: const {}),
     };
   }
 }
@@ -350,7 +407,7 @@ extension TextSelectionGestureDetectorBinding on TextSelectionGestureDetector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionGestureDetector');
+        return const HTType('TextSelectionGestureDetector');
       case 'onTapDown':
         return onTapDown;
       case 'onForcePressStart':
@@ -394,25 +451,37 @@ extension TextSelectionGestureDetectorBinding on TextSelectionGestureDetector {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -424,10 +493,13 @@ class ClipboardStatusNotifierAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ClipboardStatusNotifier':
-        return ({positionalArgs, namedArgs, typeArgs}) => ClipboardStatusNotifier(
-            value: namedArgs.containsKey('value') ? namedArgs['value'] : ClipboardStatus.unknown);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ClipboardStatusNotifier(
+                value: namedArgs.containsKey('value')
+                    ? namedArgs['value']
+                    : ClipboardStatus.unknown);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -438,7 +510,8 @@ class ClipboardStatusNotifierAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'VoidCallback': (HTFunction function) => () => function.call(positionalArgs: const [], namedArgs: const {}),
+      'VoidCallback': (HTFunction function) =>
+          () => function.call(positionalArgs: const [], namedArgs: const {}),
     };
   }
 }
@@ -447,7 +520,7 @@ extension ClipboardStatusNotifierBinding on ClipboardStatusNotifier {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ClipboardStatusNotifier');
+        return const HTType('ClipboardStatusNotifier');
       case 'disposed':
         return disposed;
       case 'value':
@@ -455,17 +528,20 @@ extension ClipboardStatusNotifierBinding on ClipboardStatusNotifier {
       case 'update':
         return ({positionalArgs, namedArgs, typeArgs}) => update();
       case 'addListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => addListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            addListener(positionalArgs[0]);
       case 'removeListener':
-        return ({positionalArgs, namedArgs, typeArgs}) => removeListener(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            removeListener(positionalArgs[0]);
       case 'didChangeAppLifecycleState':
-        return ({positionalArgs, namedArgs, typeArgs}) => didChangeAppLifecycleState(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            didChangeAppLifecycleState(positionalArgs[0]);
       case 'dispose':
         return ({positionalArgs, namedArgs, typeArgs}) => dispose();
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/text_selection_toolbar_layout_delegate.g.dart b/lib/bindings/flutter/widgets/text_selection_toolbar_layout_delegate.g.dart
index 18f42a6..4bfe5a1 100644
--- a/lib/bindings/flutter/widgets/text_selection_toolbar_layout_delegate.g.dart
+++ b/lib/bindings/flutter/widgets/text_selection_toolbar_layout_delegate.g.dart
@@ -2,18 +2,22 @@ import 'package:hetu_script/hetu_script.dart';
 import 'package:flutter/widgets.dart';
 
 class TextSelectionToolbarLayoutDelegateAutoBinding extends HTExternalClass {
-  TextSelectionToolbarLayoutDelegateAutoBinding() : super('TextSelectionToolbarLayoutDelegate');
+  TextSelectionToolbarLayoutDelegateAutoBinding()
+      : super('TextSelectionToolbarLayoutDelegate');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'TextSelectionToolbarLayoutDelegate':
-        return ({positionalArgs, namedArgs, typeArgs}) => TextSelectionToolbarLayoutDelegate(
-            anchorAbove: namedArgs['anchorAbove'],
-            anchorBelow: namedArgs['anchorBelow'],
-            fitsAbove: namedArgs.containsKey('fitsAbove') ? namedArgs['fitsAbove'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TextSelectionToolbarLayoutDelegate(
+                anchorAbove: namedArgs['anchorAbove'],
+                anchorBelow: namedArgs['anchorBelow'],
+                fitsAbove: namedArgs.containsKey('fitsAbove')
+                    ? namedArgs['fitsAbove']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -23,11 +27,12 @@ class TextSelectionToolbarLayoutDelegateAutoBinding extends HTExternalClass {
   }
 }
 
-extension TextSelectionToolbarLayoutDelegateBinding on TextSelectionToolbarLayoutDelegate {
+extension TextSelectionToolbarLayoutDelegateBinding
+    on TextSelectionToolbarLayoutDelegate {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TextSelectionToolbarLayoutDelegate');
+        return const HTType('TextSelectionToolbarLayoutDelegate');
       case 'anchorAbove':
         return anchorAbove;
       case 'anchorBelow':
@@ -35,15 +40,19 @@ extension TextSelectionToolbarLayoutDelegateBinding on TextSelectionToolbarLayou
       case 'fitsAbove':
         return fitsAbove;
       case 'getConstraintsForChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => getConstraintsForChild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getConstraintsForChild(positionalArgs[0]);
       case 'getPositionForChild':
-        return ({positionalArgs, namedArgs, typeArgs}) => getPositionForChild(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getPositionForChild(positionalArgs[0], positionalArgs[1]);
       case 'shouldRelayout':
-        return ({positionalArgs, namedArgs, typeArgs}) => shouldRelayout(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            shouldRelayout(positionalArgs[0]);
       case 'getSize':
-        return ({positionalArgs, namedArgs, typeArgs}) => getSize(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getSize(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/texture.g.dart b/lib/bindings/flutter/widgets/texture.g.dart
index 4452d3b..0caf28e 100644
--- a/lib/bindings/flutter/widgets/texture.g.dart
+++ b/lib/bindings/flutter/widgets/texture.g.dart
@@ -12,9 +12,11 @@ class TextureAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Texture(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             textureId: namedArgs['textureId'],
-            filterQuality: namedArgs.containsKey('filterQuality') ? namedArgs['filterQuality'] : FilterQuality.low);
+            filterQuality: namedArgs.containsKey('filterQuality')
+                ? namedArgs['filterQuality']
+                : FilterQuality.low);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -28,7 +30,7 @@ extension TextureBinding on Texture {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Texture');
+        return const HTType('Texture');
       case 'textureId':
         return textureId;
       case 'filterQuality':
@@ -38,33 +40,47 @@ extension TextureBinding on Texture {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/ticker_provider.g.dart b/lib/bindings/flutter/widgets/ticker_provider.g.dart
index 3135878..3fe06d7 100644
--- a/lib/bindings/flutter/widgets/ticker_provider.g.dart
+++ b/lib/bindings/flutter/widgets/ticker_provider.g.dart
@@ -14,9 +14,10 @@ class TickerModeAutoBinding extends HTExternalClass {
             enabled: namedArgs['enabled'],
             child: namedArgs['child']);
       case 'TickerMode.of':
-        return ({positionalArgs, namedArgs, typeArgs}) => TickerMode.of(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            TickerMode.of(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +31,7 @@ extension TickerModeBinding on TickerMode {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('TickerMode');
+        return const HTType('TickerMode');
       case 'enabled':
         return enabled;
       case 'child':
@@ -40,31 +41,44 @@ extension TickerModeBinding on TickerMode {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/title.g.dart b/lib/bindings/flutter/widgets/title.g.dart
index fa22513..ecc1d04 100644
--- a/lib/bindings/flutter/widgets/title.g.dart
+++ b/lib/bindings/flutter/widgets/title.g.dart
@@ -15,7 +15,7 @@ class TitleAutoBinding extends HTExternalClass {
             color: namedArgs['color'],
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -29,7 +29,7 @@ extension TitleBinding on Title {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Title');
+        return const HTType('Title');
       case 'title':
         return title;
       case 'color':
@@ -41,31 +41,44 @@ extension TitleBinding on Title {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/transitions.g.dart b/lib/bindings/flutter/widgets/transitions.g.dart
index afeee57..b90846e 100644
--- a/lib/bindings/flutter/widgets/transitions.g.dart
+++ b/lib/bindings/flutter/widgets/transitions.g.dart
@@ -12,11 +12,15 @@ class SlideTransitionAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => SlideTransition(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             position: namedArgs['position'],
-            transformHitTests: namedArgs.containsKey('transformHitTests') ? namedArgs['transformHitTests'] : true,
-            textDirection: namedArgs.containsKey('textDirection') ? namedArgs['textDirection'] : null,
+            transformHitTests: namedArgs.containsKey('transformHitTests')
+                ? namedArgs['transformHitTests']
+                : true,
+            textDirection: namedArgs.containsKey('textDirection')
+                ? namedArgs['textDirection']
+                : null,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -30,7 +34,7 @@ extension SlideTransitionBinding on SlideTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SlideTransition');
+        return const HTType('SlideTransition');
       case 'textDirection':
         return textDirection;
       case 'transformHitTests':
@@ -46,33 +50,46 @@ extension SlideTransitionBinding on SlideTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -87,10 +104,12 @@ class ScaleTransitionAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => ScaleTransition(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             scale: namedArgs['scale'],
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -104,7 +123,7 @@ extension ScaleTransitionBinding on ScaleTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScaleTransition');
+        return const HTType('ScaleTransition');
       case 'alignment':
         return alignment;
       case 'child':
@@ -118,33 +137,46 @@ extension ScaleTransitionBinding on ScaleTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -159,10 +191,12 @@ class RotationTransitionAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => RotationTransition(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             turns: namedArgs['turns'],
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : Alignment.center,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : Alignment.center,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -176,7 +210,7 @@ extension RotationTransitionBinding on RotationTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RotationTransition');
+        return const HTType('RotationTransition');
       case 'alignment':
         return alignment;
       case 'child':
@@ -190,33 +224,46 @@ extension RotationTransitionBinding on RotationTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -230,12 +277,16 @@ class SizeTransitionAutoBinding extends HTExternalClass {
       case 'SizeTransition':
         return ({positionalArgs, namedArgs, typeArgs}) => SizeTransition(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            axis: namedArgs.containsKey('axis') ? namedArgs['axis'] : Axis.vertical,
+            axis: namedArgs.containsKey('axis')
+                ? namedArgs['axis']
+                : Axis.vertical,
             sizeFactor: namedArgs['sizeFactor'],
-            axisAlignment: namedArgs.containsKey('axisAlignment') ? namedArgs['axisAlignment'] : 0.0,
+            axisAlignment: namedArgs.containsKey('axisAlignment')
+                ? namedArgs['axisAlignment']
+                : 0.0,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -249,7 +300,7 @@ extension SizeTransitionBinding on SizeTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SizeTransition');
+        return const HTType('SizeTransition');
       case 'axis':
         return axis;
       case 'axisAlignment':
@@ -265,33 +316,46 @@ extension SizeTransitionBinding on SizeTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -307,10 +371,12 @@ class FadeTransitionAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             opacity: namedArgs['opacity'],
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false,
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -324,7 +390,7 @@ extension FadeTransitionBinding on FadeTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('FadeTransition');
+        return const HTType('FadeTransition');
       case 'opacity':
         return opacity;
       case 'alwaysIncludeSemantics':
@@ -336,33 +402,47 @@ extension FadeTransitionBinding on FadeTransition {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -378,10 +458,13 @@ class SliverFadeTransitionAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             opacity: namedArgs['opacity'],
             alwaysIncludeSemantics:
-                namedArgs.containsKey('alwaysIncludeSemantics') ? namedArgs['alwaysIncludeSemantics'] : false,
-            sliver: namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
+                namedArgs.containsKey('alwaysIncludeSemantics')
+                    ? namedArgs['alwaysIncludeSemantics']
+                    : false,
+            sliver:
+                namedArgs.containsKey('sliver') ? namedArgs['sliver'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -395,7 +478,7 @@ extension SliverFadeTransitionBinding on SliverFadeTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverFadeTransition');
+        return const HTType('SliverFadeTransition');
       case 'opacity':
         return opacity;
       case 'alwaysIncludeSemantics':
@@ -407,33 +490,47 @@ extension SliverFadeTransitionBinding on SliverFadeTransition {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -449,7 +546,7 @@ class RelativeRectTweenAutoBinding extends HTExternalClass {
             begin: namedArgs.containsKey('begin') ? namedArgs['begin'] : null,
             end: namedArgs.containsKey('end') ? namedArgs['end'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -468,25 +565,30 @@ extension RelativeRectTweenBinding on RelativeRectTween {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RelativeRectTween');
+        return const HTType('RelativeRectTween');
       case 'begin':
         return begin;
       case 'end':
         return end;
       case 'lerp':
-        return ({positionalArgs, namedArgs, typeArgs}) => lerp(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            lerp(positionalArgs[0]);
       case 'transform':
-        return ({positionalArgs, namedArgs, typeArgs}) => transform(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            transform(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString();
       case 'evaluate':
-        return ({positionalArgs, namedArgs, typeArgs}) => evaluate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            evaluate(positionalArgs[0]);
       case 'animate':
-        return ({positionalArgs, namedArgs, typeArgs}) => animate(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            animate(positionalArgs[0]);
       case 'chain':
-        return ({positionalArgs, namedArgs, typeArgs}) => chain(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            chain(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -499,7 +601,7 @@ extension RelativeRectTweenBinding on RelativeRectTween {
         end = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -516,7 +618,7 @@ class PositionedTransitionAutoBinding extends HTExternalClass {
             rect: namedArgs['rect'],
             child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -530,7 +632,7 @@ extension PositionedTransitionBinding on PositionedTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('PositionedTransition');
+        return const HTType('PositionedTransition');
       case 'child':
         return child;
       case 'listenable':
@@ -542,51 +644,66 @@ extension PositionedTransitionBinding on PositionedTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
 
 class RelativePositionedTransitionAutoBinding extends HTExternalClass {
-  RelativePositionedTransitionAutoBinding() : super('RelativePositionedTransition');
+  RelativePositionedTransitionAutoBinding()
+      : super('RelativePositionedTransition');
 
   @override
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'RelativePositionedTransition':
-        return ({positionalArgs, namedArgs, typeArgs}) => RelativePositionedTransition(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            rect: namedArgs['rect'],
-            size: namedArgs['size'],
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            RelativePositionedTransition(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                rect: namedArgs['rect'],
+                size: namedArgs['size'],
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -600,7 +717,7 @@ extension RelativePositionedTransitionBinding on RelativePositionedTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('RelativePositionedTransition');
+        return const HTType('RelativePositionedTransition');
       case 'size':
         return size;
       case 'child':
@@ -614,33 +731,46 @@ extension RelativePositionedTransitionBinding on RelativePositionedTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -652,13 +782,16 @@ class DecoratedBoxTransitionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DecoratedBoxTransition':
-        return ({positionalArgs, namedArgs, typeArgs}) => DecoratedBoxTransition(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            decoration: namedArgs['decoration'],
-            position: namedArgs.containsKey('position') ? namedArgs['position'] : DecorationPosition.background,
-            child: namedArgs['child']);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DecoratedBoxTransition(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                decoration: namedArgs['decoration'],
+                position: namedArgs.containsKey('position')
+                    ? namedArgs['position']
+                    : DecorationPosition.background,
+                child: namedArgs['child']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -672,7 +805,7 @@ extension DecoratedBoxTransitionBinding on DecoratedBoxTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DecoratedBoxTransition');
+        return const HTType('DecoratedBoxTransition');
       case 'decoration':
         return decoration;
       case 'position':
@@ -686,33 +819,46 @@ extension DecoratedBoxTransitionBinding on DecoratedBoxTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -728,10 +874,14 @@ class AlignTransitionAutoBinding extends HTExternalClass {
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             alignment: namedArgs['alignment'],
             child: namedArgs['child'],
-            widthFactor: namedArgs.containsKey('widthFactor') ? namedArgs['widthFactor'] : null,
-            heightFactor: namedArgs.containsKey('heightFactor') ? namedArgs['heightFactor'] : null);
+            widthFactor: namedArgs.containsKey('widthFactor')
+                ? namedArgs['widthFactor']
+                : null,
+            heightFactor: namedArgs.containsKey('heightFactor')
+                ? namedArgs['heightFactor']
+                : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -745,7 +895,7 @@ extension AlignTransitionBinding on AlignTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AlignTransition');
+        return const HTType('AlignTransition');
       case 'widthFactor':
         return widthFactor;
       case 'heightFactor':
@@ -761,33 +911,46 @@ extension AlignTransitionBinding on AlignTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -799,16 +962,25 @@ class DefaultTextStyleTransitionAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'DefaultTextStyleTransition':
-        return ({positionalArgs, namedArgs, typeArgs}) => DefaultTextStyleTransition(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            style: namedArgs['style'],
-            child: namedArgs['child'],
-            textAlign: namedArgs.containsKey('textAlign') ? namedArgs['textAlign'] : null,
-            softWrap: namedArgs.containsKey('softWrap') ? namedArgs['softWrap'] : true,
-            overflow: namedArgs.containsKey('overflow') ? namedArgs['overflow'] : TextOverflow.clip,
-            maxLines: namedArgs.containsKey('maxLines') ? namedArgs['maxLines'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            DefaultTextStyleTransition(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                style: namedArgs['style'],
+                child: namedArgs['child'],
+                textAlign: namedArgs.containsKey('textAlign')
+                    ? namedArgs['textAlign']
+                    : null,
+                softWrap: namedArgs.containsKey('softWrap')
+                    ? namedArgs['softWrap']
+                    : true,
+                overflow: namedArgs.containsKey('overflow')
+                    ? namedArgs['overflow']
+                    : TextOverflow.clip,
+                maxLines: namedArgs.containsKey('maxLines')
+                    ? namedArgs['maxLines']
+                    : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -822,7 +994,7 @@ extension DefaultTextStyleTransitionBinding on DefaultTextStyleTransition {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DefaultTextStyleTransition');
+        return const HTType('DefaultTextStyleTransition');
       case 'textAlign':
         return textAlign;
       case 'softWrap':
@@ -842,33 +1014,46 @@ extension DefaultTextStyleTransitionBinding on DefaultTextStyleTransition {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -886,7 +1071,7 @@ class AnimatedBuilderAutoBinding extends HTExternalClass {
             builder: namedArgs['builder'],
             child: namedArgs.containsKey('child') ? namedArgs['child'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -897,8 +1082,9 @@ class AnimatedBuilderAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'TransitionBuilder': (HTFunction function) =>
-          (context, child) => function.call(positionalArgs: [context, child], namedArgs: const {}) as Widget,
+      'TransitionBuilder': (HTFunction function) => (context, child) =>
+          function.call(positionalArgs: [context, child], namedArgs: const {})
+              as Widget,
     };
   }
 }
@@ -907,7 +1093,7 @@ extension AnimatedBuilderBinding on AnimatedBuilder {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('AnimatedBuilder');
+        return const HTType('AnimatedBuilder');
       case 'builder':
         return builder;
       case 'child':
@@ -919,33 +1105,46 @@ extension AnimatedBuilderBinding on AnimatedBuilder {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/viewport.g.dart b/lib/bindings/flutter/widgets/viewport.g.dart
index 62dec7e..5bbab66 100644
--- a/lib/bindings/flutter/widgets/viewport.g.dart
+++ b/lib/bindings/flutter/widgets/viewport.g.dart
@@ -11,21 +11,34 @@ class ViewportAutoBinding extends HTExternalClass {
       case 'Viewport':
         return ({positionalArgs, namedArgs, typeArgs}) => Viewport(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down,
-            crossAxisDirection: namedArgs.containsKey('crossAxisDirection') ? namedArgs['crossAxisDirection'] : null,
+            axisDirection: namedArgs.containsKey('axisDirection')
+                ? namedArgs['axisDirection']
+                : AxisDirection.down,
+            crossAxisDirection: namedArgs.containsKey('crossAxisDirection')
+                ? namedArgs['crossAxisDirection']
+                : null,
             anchor: namedArgs.containsKey('anchor') ? namedArgs['anchor'] : 0.0,
             offset: namedArgs['offset'],
-            center: namedArgs.containsKey('center') ? namedArgs['center'] : null,
-            cacheExtent: namedArgs.containsKey('cacheExtent') ? namedArgs['cacheExtent'] : null,
-            cacheExtentStyle:
-                namedArgs.containsKey('cacheExtentStyle') ? namedArgs['cacheExtentStyle'] : CacheExtentStyle.pixel,
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            slivers: namedArgs.containsKey('slivers') ? List<Widget>.from(namedArgs['slivers']) : const <Widget>[]);
+            center:
+                namedArgs.containsKey('center') ? namedArgs['center'] : null,
+            cacheExtent: namedArgs.containsKey('cacheExtent')
+                ? namedArgs['cacheExtent']
+                : null,
+            cacheExtentStyle: namedArgs.containsKey('cacheExtentStyle')
+                ? namedArgs['cacheExtentStyle']
+                : CacheExtentStyle.pixel,
+            clipBehavior: namedArgs.containsKey('clipBehavior')
+                ? namedArgs['clipBehavior']
+                : Clip.hardEdge,
+            slivers: namedArgs.containsKey('slivers')
+                ? List<Widget>.from(namedArgs['slivers'])
+                : const <Widget>[]);
       case 'Viewport.getDefaultCrossAxisDirection':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            Viewport.getDefaultCrossAxisDirection(positionalArgs[0], positionalArgs[1]);
+            Viewport.getDefaultCrossAxisDirection(
+                positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -39,7 +52,7 @@ extension ViewportBinding on Viewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Viewport');
+        return const HTType('Viewport');
       case 'axisDirection':
         return axisDirection;
       case 'crossAxisDirection':
@@ -63,33 +76,47 @@ extension ViewportBinding on Viewport {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -101,15 +128,24 @@ class ShrinkWrappingViewportAutoBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ShrinkWrappingViewport':
-        return ({positionalArgs, namedArgs, typeArgs}) => ShrinkWrappingViewport(
-            key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
-            axisDirection: namedArgs.containsKey('axisDirection') ? namedArgs['axisDirection'] : AxisDirection.down,
-            crossAxisDirection: namedArgs.containsKey('crossAxisDirection') ? namedArgs['crossAxisDirection'] : null,
-            offset: namedArgs['offset'],
-            clipBehavior: namedArgs.containsKey('clipBehavior') ? namedArgs['clipBehavior'] : Clip.hardEdge,
-            slivers: namedArgs.containsKey('slivers') ? List<Widget>.from(namedArgs['slivers']) : const <Widget>[]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ShrinkWrappingViewport(
+                key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
+                axisDirection: namedArgs.containsKey('axisDirection')
+                    ? namedArgs['axisDirection']
+                    : AxisDirection.down,
+                crossAxisDirection: namedArgs.containsKey('crossAxisDirection')
+                    ? namedArgs['crossAxisDirection']
+                    : null,
+                offset: namedArgs['offset'],
+                clipBehavior: namedArgs.containsKey('clipBehavior')
+                    ? namedArgs['clipBehavior']
+                    : Clip.hardEdge,
+                slivers: namedArgs.containsKey('slivers')
+                    ? List<Widget>.from(namedArgs['slivers'])
+                    : const <Widget>[]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -123,7 +159,7 @@ extension ShrinkWrappingViewportBinding on ShrinkWrappingViewport {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ShrinkWrappingViewport');
+        return const HTType('ShrinkWrappingViewport');
       case 'axisDirection':
         return axisDirection;
       case 'crossAxisDirection':
@@ -139,33 +175,47 @@ extension ShrinkWrappingViewportBinding on ShrinkWrappingViewport {
       case 'hashCode':
         return hashCode;
       case 'createRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => createRenderObject(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            createRenderObject(positionalArgs[0]);
       case 'updateRenderObject':
-        return ({positionalArgs, namedArgs, typeArgs}) => updateRenderObject(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            updateRenderObject(positionalArgs[0], positionalArgs[1]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/visibility.g.dart b/lib/bindings/flutter/widgets/visibility.g.dart
index 53e68ed..09959a5 100644
--- a/lib/bindings/flutter/widgets/visibility.g.dart
+++ b/lib/bindings/flutter/widgets/visibility.g.dart
@@ -12,16 +12,29 @@ class VisibilityAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) => Visibility(
             key: namedArgs.containsKey('key') ? namedArgs['key'] : null,
             child: namedArgs['child'],
-            replacement: namedArgs.containsKey('replacement') ? namedArgs['replacement'] : const SizedBox.shrink(),
-            visible: namedArgs.containsKey('visible') ? namedArgs['visible'] : true,
-            maintainState: namedArgs.containsKey('maintainState') ? namedArgs['maintainState'] : false,
-            maintainAnimation: namedArgs.containsKey('maintainAnimation') ? namedArgs['maintainAnimation'] : false,
-            maintainSize: namedArgs.containsKey('maintainSize') ? namedArgs['maintainSize'] : false,
-            maintainSemantics: namedArgs.containsKey('maintainSemantics') ? namedArgs['maintainSemantics'] : false,
+            replacement: namedArgs.containsKey('replacement')
+                ? namedArgs['replacement']
+                : const SizedBox.shrink(),
+            visible:
+                namedArgs.containsKey('visible') ? namedArgs['visible'] : true,
+            maintainState: namedArgs.containsKey('maintainState')
+                ? namedArgs['maintainState']
+                : false,
+            maintainAnimation: namedArgs.containsKey('maintainAnimation')
+                ? namedArgs['maintainAnimation']
+                : false,
+            maintainSize: namedArgs.containsKey('maintainSize')
+                ? namedArgs['maintainSize']
+                : false,
+            maintainSemantics: namedArgs.containsKey('maintainSemantics')
+                ? namedArgs['maintainSemantics']
+                : false,
             maintainInteractivity:
-                namedArgs.containsKey('maintainInteractivity') ? namedArgs['maintainInteractivity'] : false);
+                namedArgs.containsKey('maintainInteractivity')
+                    ? namedArgs['maintainInteractivity']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -35,7 +48,7 @@ extension VisibilityBinding on Visibility {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('Visibility');
+        return const HTType('Visibility');
       case 'child':
         return child;
       case 'replacement':
@@ -57,31 +70,44 @@ extension VisibilityBinding on Visibility {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -99,15 +125,26 @@ class SliverVisibilityAutoBinding extends HTExternalClass {
             replacementSliver: namedArgs.containsKey('replacementSliver')
                 ? namedArgs['replacementSliver']
                 : const SliverToBoxAdapter(),
-            visible: namedArgs.containsKey('visible') ? namedArgs['visible'] : true,
-            maintainState: namedArgs.containsKey('maintainState') ? namedArgs['maintainState'] : false,
-            maintainAnimation: namedArgs.containsKey('maintainAnimation') ? namedArgs['maintainAnimation'] : false,
-            maintainSize: namedArgs.containsKey('maintainSize') ? namedArgs['maintainSize'] : false,
-            maintainSemantics: namedArgs.containsKey('maintainSemantics') ? namedArgs['maintainSemantics'] : false,
+            visible:
+                namedArgs.containsKey('visible') ? namedArgs['visible'] : true,
+            maintainState: namedArgs.containsKey('maintainState')
+                ? namedArgs['maintainState']
+                : false,
+            maintainAnimation: namedArgs.containsKey('maintainAnimation')
+                ? namedArgs['maintainAnimation']
+                : false,
+            maintainSize: namedArgs.containsKey('maintainSize')
+                ? namedArgs['maintainSize']
+                : false,
+            maintainSemantics: namedArgs.containsKey('maintainSemantics')
+                ? namedArgs['maintainSemantics']
+                : false,
             maintainInteractivity:
-                namedArgs.containsKey('maintainInteractivity') ? namedArgs['maintainInteractivity'] : false);
+                namedArgs.containsKey('maintainInteractivity')
+                    ? namedArgs['maintainInteractivity']
+                    : false);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -121,7 +158,7 @@ extension SliverVisibilityBinding on SliverVisibility {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('SliverVisibility');
+        return const HTType('SliverVisibility');
       case 'sliver':
         return sliver;
       case 'replacementSliver':
@@ -143,31 +180,44 @@ extension SliverVisibilityBinding on SliverVisibility {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            build(positionalArgs[0]);
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'createElement':
         return ({positionalArgs, namedArgs, typeArgs}) => createElement();
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/widget_inspector.g.dart b/lib/bindings/flutter/widgets/widget_inspector.g.dart
index 377fc86..0066827 100644
--- a/lib/bindings/flutter/widgets/widget_inspector.g.dart
+++ b/lib/bindings/flutter/widgets/widget_inspector.g.dart
@@ -15,7 +15,7 @@ class WidgetInspectorAutoBinding extends HTExternalClass {
             child: namedArgs['child'],
             selectButtonBuilder: namedArgs['selectButtonBuilder']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,7 +27,9 @@ class WidgetInspectorAutoBinding extends HTExternalClass {
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
       'InspectorSelectButtonBuilder': (HTFunction function) =>
-          (context, onPressed) => function.call(positionalArgs: [context, onPressed], namedArgs: const {}) as Widget,
+          (context, onPressed) => function.call(
+              positionalArgs: [context, onPressed],
+              namedArgs: const {}) as Widget,
     };
   }
 }
@@ -36,7 +38,7 @@ extension WidgetInspectorBinding on WidgetInspector {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WidgetInspector');
+        return const HTType('WidgetInspector');
       case 'child':
         return child;
       case 'selectButtonBuilder':
@@ -52,25 +54,37 @@ extension WidgetInspectorBinding on WidgetInspector {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -84,7 +98,7 @@ class InspectorSelectionAutoBinding extends HTExternalClass {
       case 'InspectorSelection':
         return ({positionalArgs, namedArgs, typeArgs}) => InspectorSelection();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -103,7 +117,7 @@ extension InspectorSelectionBinding on InspectorSelection {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('InspectorSelection');
+        return const HTType('InspectorSelection');
       case 'candidates':
         return candidates;
       case 'index':
@@ -117,7 +131,7 @@ extension InspectorSelectionBinding on InspectorSelection {
       case 'clear':
         return ({positionalArgs, namedArgs, typeArgs}) => clear();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -136,7 +150,7 @@ extension InspectorSelectionBinding on InspectorSelection {
         currentElement = value;
         break;
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
@@ -151,7 +165,7 @@ class DevToolsDeepLinkPropertyAutoBinding extends HTExternalClass {
         return ({positionalArgs, namedArgs, typeArgs}) =>
             DevToolsDeepLinkProperty(positionalArgs[0], positionalArgs[1]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -165,7 +179,7 @@ extension DevToolsDeepLinkPropertyBinding on DevToolsDeepLinkProperty {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('DevToolsDeepLinkProperty');
+        return const HTType('DevToolsDeepLinkProperty');
       case 'expandableValue':
         return expandableValue;
       case 'allowWrap':
@@ -205,33 +219,49 @@ extension DevToolsDeepLinkPropertyBinding on DevToolsDeepLinkProperty {
       case 'allowTruncate':
         return allowTruncate;
       case 'toJsonMap':
-        return ({positionalArgs, namedArgs, typeArgs}) => toJsonMap(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            toJsonMap(positionalArgs[0]);
       case 'valueToString':
         return ({positionalArgs, namedArgs, typeArgs}) => valueToString(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'toDescription':
         return ({positionalArgs, namedArgs, typeArgs}) => toDescription(
-            parentConfiguration:
-                namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null);
       case 'getProperties':
         return ({positionalArgs, namedArgs, typeArgs}) => getProperties();
       case 'getChildren':
         return ({positionalArgs, namedArgs, typeArgs}) => getChildren();
       case 'isFiltered':
-        return ({positionalArgs, namedArgs, typeArgs}) => isFiltered(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            isFiltered(positionalArgs[0]);
       case 'toString':
         return ({positionalArgs, namedArgs, typeArgs}) => toString(
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            parentConfiguration: namedArgs.containsKey('parentConfiguration') ? namedArgs['parentConfiguration'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            parentConfiguration: namedArgs.containsKey('parentConfiguration')
+                ? namedArgs['parentConfiguration']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/widget_span.g.dart b/lib/bindings/flutter/widgets/widget_span.g.dart
index e40175c..1cbb226 100644
--- a/lib/bindings/flutter/widgets/widget_span.g.dart
+++ b/lib/bindings/flutter/widgets/widget_span.g.dart
@@ -12,11 +12,15 @@ class WidgetSpanAutoBinding extends HTExternalClass {
       case 'WidgetSpan':
         return ({positionalArgs, namedArgs, typeArgs}) => WidgetSpan(
             child: namedArgs['child'],
-            alignment: namedArgs.containsKey('alignment') ? namedArgs['alignment'] : ui.PlaceholderAlignment.bottom,
-            baseline: namedArgs.containsKey('baseline') ? namedArgs['baseline'] : null,
+            alignment: namedArgs.containsKey('alignment')
+                ? namedArgs['alignment']
+                : ui.PlaceholderAlignment.bottom,
+            baseline: namedArgs.containsKey('baseline')
+                ? namedArgs['baseline']
+                : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,8 +31,8 @@ class WidgetSpanAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'InlineSpanVisitor': (HTFunction function) =>
-          (span) => function.call(positionalArgs: [span], namedArgs: const {}) as bool,
+      'InlineSpanVisitor': (HTFunction function) => (span) =>
+          function.call(positionalArgs: [span], namedArgs: const {}) as bool,
     };
   }
 }
@@ -37,7 +41,7 @@ extension WidgetSpanBinding on WidgetSpan {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WidgetSpan');
+        return const HTType('WidgetSpan');
       case 'child':
         return child;
       case 'alignment':
@@ -49,56 +53,86 @@ extension WidgetSpanBinding on WidgetSpan {
       case 'hashCode':
         return hashCode;
       case 'build':
-        return ({positionalArgs, namedArgs, typeArgs}) => build(positionalArgs[0],
-            textScaleFactor: namedArgs.containsKey('textScaleFactor') ? namedArgs['textScaleFactor'] : 1.0,
-            dimensions:
-                namedArgs.containsKey('dimensions') ? List<PlaceholderDimensions>.from(namedArgs['dimensions']) : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => build(
+            positionalArgs[0],
+            textScaleFactor: namedArgs.containsKey('textScaleFactor')
+                ? namedArgs['textScaleFactor']
+                : 1.0,
+            dimensions: namedArgs.containsKey('dimensions')
+                ? List<PlaceholderDimensions>.from(namedArgs['dimensions'])
+                : null);
       case 'visitChildren':
-        return ({positionalArgs, namedArgs, typeArgs}) => visitChildren(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            visitChildren(positionalArgs[0]);
       case 'getSpanForPositionVisitor':
         return ({positionalArgs, namedArgs, typeArgs}) =>
             getSpanForPositionVisitor(positionalArgs[0], positionalArgs[1]);
       case 'codeUnitAtVisitor':
-        return ({positionalArgs, namedArgs, typeArgs}) => codeUnitAtVisitor(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            codeUnitAtVisitor(positionalArgs[0], positionalArgs[1]);
       case 'compareTo':
-        return ({positionalArgs, namedArgs, typeArgs}) => compareTo(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            compareTo(positionalArgs[0]);
       case 'getSpanForPosition':
-        return ({positionalArgs, namedArgs, typeArgs}) => getSpanForPosition(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getSpanForPosition(positionalArgs[0]);
       case 'debugAssertIsValid':
         return ({positionalArgs, namedArgs, typeArgs}) => debugAssertIsValid();
       case 'computeToPlainText':
-        return ({positionalArgs, namedArgs, typeArgs}) => computeToPlainText(positionalArgs[0],
+        return ({positionalArgs, namedArgs, typeArgs}) => computeToPlainText(
+            positionalArgs[0],
             includeSemanticsLabels:
-                namedArgs.containsKey('includeSemanticsLabels') ? namedArgs['includeSemanticsLabels'] : true,
-            includePlaceholders:
-                namedArgs.containsKey('includePlaceholders') ? namedArgs['includePlaceholders'] : true);
+                namedArgs.containsKey('includeSemanticsLabels')
+                    ? namedArgs['includeSemanticsLabels']
+                    : true,
+            includePlaceholders: namedArgs.containsKey('includePlaceholders')
+                ? namedArgs['includePlaceholders']
+                : true);
       case 'computeSemanticsInformation':
         return ({positionalArgs, namedArgs, typeArgs}) =>
-            computeSemanticsInformation(List<InlineSpanSemanticsInformation>.from(positionalArgs[0]));
+            computeSemanticsInformation(
+                List<InlineSpanSemanticsInformation>.from(positionalArgs[0]));
       case 'describeSemantics':
         return ({positionalArgs, namedArgs, typeArgs}) => describeSemantics(
-            positionalArgs[0], List<int>.from(positionalArgs[1]), List<dynamic>.from(positionalArgs[2]));
+            positionalArgs[0],
+            List<int>.from(positionalArgs[1]),
+            List<dynamic>.from(positionalArgs[2]));
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toPlainText':
         return ({positionalArgs, namedArgs, typeArgs}) => toPlainText(
             includeSemanticsLabels:
-                namedArgs.containsKey('includeSemanticsLabels') ? namedArgs['includeSemanticsLabels'] : true,
-            includePlaceholders:
-                namedArgs.containsKey('includePlaceholders') ? namedArgs['includePlaceholders'] : true);
+                namedArgs.containsKey('includeSemanticsLabels')
+                    ? namedArgs['includeSemanticsLabels']
+                    : true,
+            includePlaceholders: namedArgs.containsKey('includePlaceholders')
+                ? namedArgs['includePlaceholders']
+                : true);
       case 'getSemanticsInformation':
-        return ({positionalArgs, namedArgs, typeArgs}) => getSemanticsInformation();
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            getSemanticsInformation();
       case 'codeUnitAt':
-        return ({positionalArgs, namedArgs, typeArgs}) => codeUnitAt(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            codeUnitAt(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'toDiagnosticsNode':
@@ -106,10 +140,12 @@ extension WidgetSpanBinding on WidgetSpan {
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter/widgets/will_pop_scope.g.dart b/lib/bindings/flutter/widgets/will_pop_scope.g.dart
index 5147e6a..96343c6 100644
--- a/lib/bindings/flutter/widgets/will_pop_scope.g.dart
+++ b/lib/bindings/flutter/widgets/will_pop_scope.g.dart
@@ -13,7 +13,7 @@ class WillPopScopeAutoBinding extends HTExternalClass {
             child: namedArgs['child'],
             onWillPop: namedArgs['onWillPop']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -24,8 +24,8 @@ class WillPopScopeAutoBinding extends HTExternalClass {
 
   static Map<String, HTExternalFunctionTypedef> functionWrapper() {
     return <String, HTExternalFunctionTypedef>{
-      'WillPopCallback': (HTFunction function) =>
-          () => function.call(positionalArgs: const [], namedArgs: const {}) as Future<bool>,
+      'WillPopCallback': (HTFunction function) => () => function
+          .call(positionalArgs: const [], namedArgs: const {}) as Future<bool>,
     };
   }
 }
@@ -34,7 +34,7 @@ extension WillPopScopeBinding on WillPopScope {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('WillPopScope');
+        return const HTType('WillPopScope');
       case 'child':
         return child;
       case 'onWillPop':
@@ -50,25 +50,37 @@ extension WillPopScopeBinding on WillPopScope {
       case 'toStringShort':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShort();
       case 'debugFillProperties':
-        return ({positionalArgs, namedArgs, typeArgs}) => debugFillProperties(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            debugFillProperties(positionalArgs[0]);
       case 'toStringShallow':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringShallow(
-            joiner: namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            joiner:
+                namedArgs.containsKey('joiner') ? namedArgs['joiner'] : ', ',
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toStringDeep':
         return ({positionalArgs, namedArgs, typeArgs}) => toStringDeep(
-            prefixLineOne: namedArgs.containsKey('prefixLineOne') ? namedArgs['prefixLineOne'] : '',
-            prefixOtherLines: namedArgs.containsKey('prefixOtherLines') ? namedArgs['prefixOtherLines'] : null,
-            minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.debug);
+            prefixLineOne: namedArgs.containsKey('prefixLineOne')
+                ? namedArgs['prefixLineOne']
+                : '',
+            prefixOtherLines: namedArgs.containsKey('prefixOtherLines')
+                ? namedArgs['prefixOtherLines']
+                : null,
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.debug);
       case 'toDiagnosticsNode':
         return ({positionalArgs, namedArgs, typeArgs}) => toDiagnosticsNode(
             name: namedArgs.containsKey('name') ? namedArgs['name'] : null,
             style: namedArgs.containsKey('style') ? namedArgs['style'] : null);
       case 'toString':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            toString(minLevel: namedArgs.containsKey('minLevel') ? namedArgs['minLevel'] : DiagnosticLevel.info);
+        return ({positionalArgs, namedArgs, typeArgs}) => toString(
+            minLevel: namedArgs.containsKey('minLevel')
+                ? namedArgs['minLevel']
+                : DiagnosticLevel.info);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/bindings/flutter_library_binding.dart b/lib/bindings/flutter_library_binding.dart
index 955a5b1..067fbee 100644
--- a/lib/bindings/flutter_library_binding.dart
+++ b/lib/bindings/flutter_library_binding.dart
@@ -45,10 +45,8 @@ import 'dart/io/string_transformer.g.dart';
 import 'dart/io/sync_socket.g.dart';
 import 'dart/core/bigint.g.dart';
 import 'dart/core/date_time.g.dart';
-import 'dart/core/double.g.dart';
 import 'dart/core/duration.g.dart';
 import 'dart/core/function.g.dart';
-import 'dart/core/int.g.dart';
 import 'dart/core/invocation.g.dart';
 import 'dart/core/regexp.g.dart';
 import 'dart/core/stacktrace.g.dart';
@@ -491,31 +489,44 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(TrainHoppingAnimationAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimationMeanAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimationControllerAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoActionSheetActionAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoActionSheetActionAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoAppAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoButtonAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoContextMenuAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoContextMenuActionAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoContextMenuActionAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoDialogActionAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoNavigationBarBackButtonAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoNavigationBarBackButtonAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoPickerAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoSliverRefreshControlAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoSliverRefreshControlAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoScrollbarAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoSearchTextFieldAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoTabControllerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoSearchTextFieldAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoTabControllerAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoTabScaffoldAutoBinding.functionWrapper());
-    functionWrappers.addAll(RestorableCupertinoTabControllerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RestorableCupertinoTabControllerAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoTabViewAutoBinding.functionWrapper());
     functionWrappers.addAll(CupertinoTextFieldAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoTextFormFieldRowAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoTextSelectionToolbarAutoBinding.functionWrapper());
-    functionWrappers.addAll(CupertinoTextSelectionToolbarButtonAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoTextFormFieldRowAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(CupertinoTextSelectionToolbarAutoBinding.functionWrapper());
+    functionWrappers.addAll(
+        CupertinoTextSelectionToolbarButtonAutoBinding.functionWrapper());
     functionWrappers.addAll(FlutterErrorDetailsAutoBinding.functionWrapper());
     functionWrappers.addAll(ListenableAutoBinding.functionWrapper());
     functionWrappers.addAll(ChangeNotifierAutoBinding.functionWrapper());
     functionWrappers.addAll(LicenseRegistryAutoBinding.functionWrapper());
-    functionWrappers.addAll(FlutterErrorDetailsForPointerEventDispatcherAutoBinding.functionWrapper());
-    functionWrappers.addAll(ForcePressGestureRecognizerAutoBinding.functionWrapper());
+    functionWrappers.addAll(
+        FlutterErrorDetailsForPointerEventDispatcherAutoBinding
+            .functionWrapper());
+    functionWrappers
+        .addAll(ForcePressGestureRecognizerAutoBinding.functionWrapper());
     functionWrappers.addAll(PointerRouterAutoBinding.functionWrapper());
     functionWrappers.addAll(PointerSignalResolverAutoBinding.functionWrapper());
     functionWrappers.addAll(PointerEventResamplerAutoBinding.functionWrapper());
@@ -551,7 +562,8 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(InkSplashAutoBinding.functionWrapper());
     functionWrappers.addAll(InkResponseAutoBinding.functionWrapper());
     functionWrappers.addAll(InkWellAutoBinding.functionWrapper());
-    functionWrappers.addAll(InputDatePickerFormFieldAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(InputDatePickerFormFieldAutoBinding.functionWrapper());
     functionWrappers.addAll(ListTileAutoBinding.functionWrapper());
     functionWrappers.addAll(MaterialButtonAutoBinding.functionWrapper());
     functionWrappers.addAll(OutlinedButtonAutoBinding.functionWrapper());
@@ -559,7 +571,8 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(RefreshIndicatorAutoBinding.functionWrapper());
     functionWrappers.addAll(RefreshIndicatorStateAutoBinding.functionWrapper());
     functionWrappers.addAll(ReorderableListViewAutoBinding.functionWrapper());
-    functionWrappers.addAll(ScaffoldMessengerStateAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(ScaffoldMessengerStateAutoBinding.functionWrapper());
     functionWrappers.addAll(ScaffoldAutoBinding.functionWrapper());
     functionWrappers.addAll(ScaffoldStateAutoBinding.functionWrapper());
     functionWrappers.addAll(ScrollbarAutoBinding.functionWrapper());
@@ -576,9 +589,11 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(TextFieldAutoBinding.functionWrapper());
     functionWrappers.addAll(TextFormFieldAutoBinding.functionWrapper());
     functionWrappers.addAll(TextSelectionToolbarAutoBinding.functionWrapper());
-    functionWrappers.addAll(TextSelectionToolbarTextButtonAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(TextSelectionToolbarTextButtonAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedThemeAutoBinding.functionWrapper());
-    functionWrappers.addAll(UserAccountsDrawerHeaderAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(UserAccountsDrawerHeaderAutoBinding.functionWrapper());
     functionWrappers.addAll(BoxDecorationAutoBinding.functionWrapper());
     functionWrappers.addAll(DecorationImageAutoBinding.functionWrapper());
     functionWrappers.addAll(FlutterLogoDecorationAutoBinding.functionWrapper());
@@ -590,15 +605,19 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(ExactAssetImageAutoBinding.functionWrapper());
     functionWrappers.addAll(AssetImageAutoBinding.functionWrapper());
     functionWrappers.addAll(ImageStreamListenerAutoBinding.functionWrapper());
-    functionWrappers.addAll(OneFrameImageStreamCompleterAutoBinding.functionWrapper());
-    functionWrappers.addAll(MultiFrameImageStreamCompleterAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(OneFrameImageStreamCompleterAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(MultiFrameImageStreamCompleterAutoBinding.functionWrapper());
     functionWrappers.addAll(ShapeDecorationAutoBinding.functionWrapper());
     functionWrappers.addAll(TextSpanAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderAnimatedSizeAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderingFlutterBindingAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderingFlutterBindingAutoBinding.functionWrapper());
     functionWrappers.addAll(BoxConstraintsAutoBinding.functionWrapper());
     functionWrappers.addAll(BoxHitTestResultAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderCustomMultiChildLayoutBoxAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderCustomMultiChildLayoutBoxAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderCustomPaintAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderEditableAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderErrorBoxAutoBinding.functionWrapper());
@@ -606,13 +625,16 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(RenderFlowAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderImageAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderListBodyAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderListWheelViewportAutoBinding.functionWrapper());
-    functionWrappers.addAll(MouseTrackerAnnotationAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderListWheelViewportAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(MouseTrackerAnnotationAutoBinding.functionWrapper());
     functionWrappers.addAll(MouseTrackerAutoBinding.functionWrapper());
     functionWrappers.addAll(PaintingContextAutoBinding.functionWrapper());
     functionWrappers.addAll(PipelineOwnerAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderParagraphAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderPerformanceOverlayAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderPerformanceOverlayAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderAndroidViewAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderUiKitViewAutoBinding.functionWrapper());
     functionWrappers.addAll(PlatformViewRenderBoxAutoBinding.functionWrapper());
@@ -636,7 +658,8 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(RenderDecoratedBoxAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderTransformAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderFittedBoxAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderFractionalTranslationAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderFractionalTranslationAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderPointerListenerAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderMouseRegionAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderRepaintBoundaryAutoBinding.functionWrapper());
@@ -644,47 +667,66 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(RenderOffstageAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderAbsorbPointerAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderMetaDataAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSemanticsGestureHandlerAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSemanticsAnnotationsAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSemanticsGestureHandlerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSemanticsAnnotationsAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderBlockSemanticsAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderMergeSemanticsAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderExcludeSemanticsAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderIndexedSemanticsAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderExcludeSemanticsAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderIndexedSemanticsAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderLeaderLayerAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderFollowerLayerAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderSliverOpacityAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverIgnorePointerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverIgnorePointerAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderSliverOffstageAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverAnimatedOpacityAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverAnimatedOpacityAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderRotatedBoxAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderPaddingAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderPositionedBoxAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderConstrainedOverflowBoxAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderUnconstrainedBoxAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSizedOverflowBoxAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderFractionallySizedOverflowBoxAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderCustomSingleChildLayoutBoxAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderConstrainedOverflowBoxAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderUnconstrainedBoxAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSizedOverflowBoxAutoBinding.functionWrapper());
+    functionWrappers.addAll(
+        RenderFractionallySizedOverflowBoxAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderCustomSingleChildLayoutBoxAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderBaselineAutoBinding.functionWrapper());
     functionWrappers.addAll(SliverConstraintsAutoBinding.functionWrapper());
     functionWrappers.addAll(SliverGeometryAutoBinding.functionWrapper());
     functionWrappers.addAll(SliverHitTestResultAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverToBoxAdapterAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverFillViewportAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverFillRemainingWithScrollableAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverFillRemainingAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverFillRemainingAndOverscrollAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverFixedExtentListAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverToBoxAdapterAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverFillViewportAutoBinding.functionWrapper());
+    functionWrappers.addAll(
+        RenderSliverFillRemainingWithScrollableAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverFillRemainingAutoBinding.functionWrapper());
+    functionWrappers.addAll(
+        RenderSliverFillRemainingAndOverscrollAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverFixedExtentListAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderSliverGridAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderSliverListAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderSliverPaddingAutoBinding.functionWrapper());
-    functionWrappers.addAll(OverScrollHeaderStretchConfigurationAutoBinding.functionWrapper());
+    functionWrappers.addAll(
+        OverScrollHeaderStretchConfigurationAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderStackAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderIndexedStackAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderTableAutoBinding.functionWrapper());
     functionWrappers.addAll(TextureBoxAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderViewAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderViewportAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderShrinkWrappingViewportAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderShrinkWrappingViewportAutoBinding.functionWrapper());
     functionWrappers.addAll(ViewportOffsetAutoBinding.functionWrapper());
     functionWrappers.addAll(RenderWrapAutoBinding.functionWrapper());
     functionWrappers.addAll(TickerAutoBinding.functionWrapper());
@@ -692,7 +734,8 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(SemanticsPropertiesAutoBinding.functionWrapper());
     functionWrappers.addAll(SemanticsNodeAutoBinding.functionWrapper());
     functionWrappers.addAll(SemanticsOwnerAutoBinding.functionWrapper());
-    functionWrappers.addAll(SemanticsConfigurationAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SemanticsConfigurationAutoBinding.functionWrapper());
     functionWrappers.addAll(PlatformViewsServiceAutoBinding.functionWrapper());
     functionWrappers.addAll(RestorationManagerAutoBinding.functionWrapper());
     functionWrappers.addAll(TextInputFormatterAutoBinding.functionWrapper());
@@ -703,13 +746,15 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(AnimatedListAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedListStateAutoBinding.functionWrapper());
     functionWrappers.addAll(SliverAnimatedListAutoBinding.functionWrapper());
-    functionWrappers.addAll(SliverAnimatedListStateAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SliverAnimatedListStateAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedSwitcherAutoBinding.functionWrapper());
     functionWrappers.addAll(WidgetsAppAutoBinding.functionWrapper());
     functionWrappers.addAll(KeepAliveHandleAutoBinding.functionWrapper());
     functionWrappers.addAll(BannerPainterAutoBinding.functionWrapper());
     functionWrappers.addAll(ShaderMaskAutoBinding.functionWrapper());
-    functionWrappers.addAll(WidgetToRenderBoxAdapterAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(WidgetToRenderBoxAdapterAutoBinding.functionWrapper());
     functionWrappers.addAll(ListenerAutoBinding.functionWrapper());
     functionWrappers.addAll(MouseRegionAutoBinding.functionWrapper());
     functionWrappers.addAll(SemanticsAutoBinding.functionWrapper());
@@ -717,7 +762,8 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(StatefulBuilderAutoBinding.functionWrapper());
     functionWrappers.addAll(WidgetsFlutterBindingAutoBinding.functionWrapper());
     functionWrappers.addAll(DismissibleAutoBinding.functionWrapper());
-    functionWrappers.addAll(DraggableScrollableSheetAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(DraggableScrollableSheetAutoBinding.functionWrapper());
     functionWrappers.addAll(DualTransitionBuilderAutoBinding.functionWrapper());
     functionWrappers.addAll(TextEditingControllerAutoBinding.functionWrapper());
     functionWrappers.addAll(EditableTextAutoBinding.functionWrapper());
@@ -730,15 +776,19 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(RequestFocusActionAutoBinding.functionWrapper());
     functionWrappers.addAll(NextFocusActionAutoBinding.functionWrapper());
     functionWrappers.addAll(PreviousFocusActionAutoBinding.functionWrapper());
-    functionWrappers.addAll(DirectionalFocusActionAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(DirectionalFocusActionAutoBinding.functionWrapper());
     functionWrappers.addAll(FormAutoBinding.functionWrapper());
     functionWrappers.addAll(BuildOwnerAutoBinding.functionWrapper());
     functionWrappers.addAll(StatelessElementAutoBinding.functionWrapper());
     functionWrappers.addAll(StatefulElementAutoBinding.functionWrapper());
     functionWrappers.addAll(InheritedElementAutoBinding.functionWrapper());
-    functionWrappers.addAll(LeafRenderObjectElementAutoBinding.functionWrapper());
-    functionWrappers.addAll(SingleChildRenderObjectElementAutoBinding.functionWrapper());
-    functionWrappers.addAll(MultiChildRenderObjectElementAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(LeafRenderObjectElementAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SingleChildRenderObjectElementAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(MultiChildRenderObjectElementAutoBinding.functionWrapper());
     functionWrappers.addAll(GestureDetectorAutoBinding.functionWrapper());
     functionWrappers.addAll(HeroAutoBinding.functionWrapper());
     functionWrappers.addAll(HeroControllerAutoBinding.functionWrapper());
@@ -747,28 +797,38 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(AnimatedPaddingAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedAlignAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedPositionedAutoBinding.functionWrapper());
-    functionWrappers.addAll(AnimatedPositionedDirectionalAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(AnimatedPositionedDirectionalAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedOpacityAutoBinding.functionWrapper());
     functionWrappers.addAll(SliverAnimatedOpacityAutoBinding.functionWrapper());
-    functionWrappers.addAll(AnimatedDefaultTextStyleAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(AnimatedDefaultTextStyleAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedPhysicalModelAutoBinding.functionWrapper());
     functionWrappers.addAll(InteractiveViewerAutoBinding.functionWrapper());
-    functionWrappers.addAll(TransformationControllerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(TransformationControllerAutoBinding.functionWrapper());
     functionWrappers.addAll(LayoutBuilderAutoBinding.functionWrapper());
-    functionWrappers.addAll(ListWheelChildBuilderDelegateAutoBinding.functionWrapper());
-    functionWrappers.addAll(FixedExtentScrollControllerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(ListWheelChildBuilderDelegateAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(FixedExtentScrollControllerAutoBinding.functionWrapper());
     functionWrappers.addAll(ListWheelElementAutoBinding.functionWrapper());
     functionWrappers.addAll(NavigatorAutoBinding.functionWrapper());
     functionWrappers.addAll(NavigatorStateAutoBinding.functionWrapper());
     functionWrappers.addAll(NestedScrollViewAutoBinding.functionWrapper());
-    functionWrappers.addAll(SliverOverlapAbsorberHandleAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverOverlapAbsorberAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderSliverOverlapInjectorAutoBinding.functionWrapper());
-    functionWrappers.addAll(RenderNestedScrollViewViewportAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SliverOverlapAbsorberHandleAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverOverlapAbsorberAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderSliverOverlapInjectorAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RenderNestedScrollViewViewportAutoBinding.functionWrapper());
     functionWrappers.addAll(OrientationBuilderAutoBinding.functionWrapper());
     functionWrappers.addAll(OverlayEntryAutoBinding.functionWrapper());
     functionWrappers.addAll(OverlayStateAutoBinding.functionWrapper());
-    functionWrappers.addAll(GlowingOverscrollIndicatorAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(GlowingOverscrollIndicatorAutoBinding.functionWrapper());
     functionWrappers.addAll(PageControllerAutoBinding.functionWrapper());
     functionWrappers.addAll(PageViewAutoBinding.functionWrapper());
     functionWrappers.addAll(AndroidViewAutoBinding.functionWrapper());
@@ -776,7 +836,8 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(PlatformViewLinkAutoBinding.functionWrapper());
     functionWrappers.addAll(ReorderableListAutoBinding.functionWrapper());
     functionWrappers.addAll(SliverReorderableListAutoBinding.functionWrapper());
-    functionWrappers.addAll(SliverReorderableListStateAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SliverReorderableListStateAutoBinding.functionWrapper());
     functionWrappers.addAll(RestorableDoubleAutoBinding.functionWrapper());
     functionWrappers.addAll(RestorableIntAutoBinding.functionWrapper());
     functionWrappers.addAll(RestorableStringAutoBinding.functionWrapper());
@@ -785,8 +846,10 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(RestorableDoubleNAutoBinding.functionWrapper());
     functionWrappers.addAll(RestorableIntNAutoBinding.functionWrapper());
     functionWrappers.addAll(RestorableStringNAutoBinding.functionWrapper());
-    functionWrappers.addAll(RestorableTextEditingControllerAutoBinding.functionWrapper());
-    functionWrappers.addAll(PlatformRouteInformationProviderAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(RestorableTextEditingControllerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(PlatformRouteInformationProviderAutoBinding.functionWrapper());
     functionWrappers.addAll(LocalHistoryEntryAutoBinding.functionWrapper());
     functionWrappers.addAll(ScrollableAutoBinding.functionWrapper());
     functionWrappers.addAll(ScrollableStateAutoBinding.functionWrapper());
@@ -796,18 +859,25 @@ class FlutterLibraryBinding extends BindingHandler {
     functionWrappers.addAll(HoldScrollActivityAutoBinding.functionWrapper());
     functionWrappers.addAll(ScrollDragControllerAutoBinding.functionWrapper());
     functionWrappers.addAll(ScrollControllerAutoBinding.functionWrapper());
-    functionWrappers.addAll(TrackingScrollControllerAutoBinding.functionWrapper());
-    functionWrappers.addAll(ScrollPositionWithSingleContextAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(TrackingScrollControllerAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(ScrollPositionWithSingleContextAutoBinding.functionWrapper());
     functionWrappers.addAll(ListViewAutoBinding.functionWrapper());
     functionWrappers.addAll(GridViewAutoBinding.functionWrapper());
     functionWrappers.addAll(ShortcutManagerAutoBinding.functionWrapper());
-    functionWrappers.addAll(SliverChildBuilderDelegateAutoBinding.functionWrapper());
-    functionWrappers.addAll(SliverChildListDelegateAutoBinding.functionWrapper());
-    functionWrappers.addAll(SliverMultiBoxAdaptorElementAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SliverChildBuilderDelegateAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SliverChildListDelegateAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(SliverMultiBoxAdaptorElementAutoBinding.functionWrapper());
     functionWrappers.addAll(SliverLayoutBuilderAutoBinding.functionWrapper());
     functionWrappers.addAll(TextSelectionOverlayAutoBinding.functionWrapper());
-    functionWrappers.addAll(TextSelectionGestureDetectorAutoBinding.functionWrapper());
-    functionWrappers.addAll(ClipboardStatusNotifierAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(TextSelectionGestureDetectorAutoBinding.functionWrapper());
+    functionWrappers
+        .addAll(ClipboardStatusNotifierAutoBinding.functionWrapper());
     functionWrappers.addAll(AnimatedBuilderAutoBinding.functionWrapper());
     functionWrappers.addAll(WidgetInspectorAutoBinding.functionWrapper());
     functionWrappers.addAll(WidgetSpanAutoBinding.functionWrapper());
@@ -984,10 +1054,8 @@ class FlutterLibraryBinding extends BindingHandler {
       RawSynchronousSocketAutoBinding(),
       BigIntAutoBinding(),
       DateTimeAutoBinding(),
-      DoubleAutoBinding(),
       DurationAutoBinding(),
       FunctionAutoBinding(),
-      IntAutoBinding(),
       InvocationAutoBinding(),
       RegExpAutoBinding(),
       StackTraceAutoBinding(),
@@ -2200,10 +2268,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('dart://io/sync_socket.ht'));
     futures.add(interpreter.import('dart://core/bigint.ht'));
     futures.add(interpreter.import('dart://core/date_time.ht'));
-    futures.add(interpreter.import('dart://core/double.ht'));
     futures.add(interpreter.import('dart://core/duration.ht'));
     futures.add(interpreter.import('dart://core/function.ht'));
-    futures.add(interpreter.import('dart://core/int.ht'));
     futures.add(interpreter.import('dart://core/invocation.ht'));
     futures.add(interpreter.import('dart://core/regexp.ht'));
     futures.add(interpreter.import('dart://core/stacktrace.ht'));
@@ -2213,18 +2279,21 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('dart://core/uri.ht'));
     futures.add(interpreter.import('flutter://animation/animation.ht'));
     futures.add(interpreter.import('flutter://animation/animations.ht'));
-    futures.add(interpreter.import('flutter://animation/animation_controller.ht'));
+    futures
+        .add(interpreter.import('flutter://animation/animation_controller.ht'));
     futures.add(interpreter.import('flutter://animation/curves.ht'));
     futures.add(interpreter.import('flutter://animation/tween.ht'));
     futures.add(interpreter.import('flutter://animation/tween_sequence.ht'));
     futures.add(interpreter.import('flutter://cupertino/action_sheet.ht'));
-    futures.add(interpreter.import('flutter://cupertino/activity_indicator.ht'));
+    futures
+        .add(interpreter.import('flutter://cupertino/activity_indicator.ht'));
     futures.add(interpreter.import('flutter://cupertino/app.ht'));
     futures.add(interpreter.import('flutter://cupertino/bottom_tab_bar.ht'));
     futures.add(interpreter.import('flutter://cupertino/button.ht'));
     futures.add(interpreter.import('flutter://cupertino/colors.ht'));
     futures.add(interpreter.import('flutter://cupertino/context_menu.ht'));
-    futures.add(interpreter.import('flutter://cupertino/context_menu_action.ht'));
+    futures
+        .add(interpreter.import('flutter://cupertino/context_menu_action.ht'));
     futures.add(interpreter.import('flutter://cupertino/date_picker.ht'));
     futures.add(interpreter.import('flutter://cupertino/dialog.ht'));
     futures.add(interpreter.import('flutter://cupertino/form_row.ht'));
@@ -2245,10 +2314,13 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://cupertino/tab_scaffold.ht'));
     futures.add(interpreter.import('flutter://cupertino/tab_view.ht'));
     futures.add(interpreter.import('flutter://cupertino/text_field.ht'));
-    futures.add(interpreter.import('flutter://cupertino/text_form_field_row.ht'));
+    futures
+        .add(interpreter.import('flutter://cupertino/text_form_field_row.ht'));
     futures.add(interpreter.import('flutter://cupertino/text_selection.ht'));
-    futures.add(interpreter.import('flutter://cupertino/text_selection_toolbar.ht'));
-    futures.add(interpreter.import('flutter://cupertino/text_selection_toolbar_button.ht'));
+    futures.add(
+        interpreter.import('flutter://cupertino/text_selection_toolbar.ht'));
+    futures.add(interpreter
+        .import('flutter://cupertino/text_selection_toolbar_button.ht'));
     futures.add(interpreter.import('flutter://cupertino/text_theme.ht'));
     futures.add(interpreter.import('flutter://cupertino/theme.ht'));
     futures.add(interpreter.import('flutter://cupertino/thumb_painter.ht'));
@@ -2277,7 +2349,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://gestures/multidrag.ht'));
     futures.add(interpreter.import('flutter://gestures/multitap.ht'));
     futures.add(interpreter.import('flutter://gestures/pointer_router.ht'));
-    futures.add(interpreter.import('flutter://gestures/pointer_signal_resolver.ht'));
+    futures.add(
+        interpreter.import('flutter://gestures/pointer_signal_resolver.ht'));
     futures.add(interpreter.import('flutter://gestures/recognizer.ht'));
     futures.add(interpreter.import('flutter://gestures/resampler.ht'));
     futures.add(interpreter.import('flutter://gestures/scale.ht'));
@@ -2286,7 +2359,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://gestures/velocity_tracker.ht'));
     futures.add(interpreter.import('flutter://material/about.ht'));
     futures.add(interpreter.import('flutter://material/animated_icons.ht'));
-    futures.add(interpreter.import('flutter://material/animated_icons_data.ht'));
+    futures
+        .add(interpreter.import('flutter://material/animated_icons_data.ht'));
     futures.add(interpreter.import('flutter://material/app.ht'));
     futures.add(interpreter.import('flutter://material/app_bar.ht'));
     futures.add(interpreter.import('flutter://material/app_bar_theme.ht'));
@@ -2295,9 +2369,12 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/banner.ht'));
     futures.add(interpreter.import('flutter://material/banner_theme.ht'));
     futures.add(interpreter.import('flutter://material/bottom_app_bar.ht'));
-    futures.add(interpreter.import('flutter://material/bottom_app_bar_theme.ht'));
-    futures.add(interpreter.import('flutter://material/bottom_navigation_bar.ht'));
-    futures.add(interpreter.import('flutter://material/bottom_navigation_bar_theme.ht'));
+    futures
+        .add(interpreter.import('flutter://material/bottom_app_bar_theme.ht'));
+    futures
+        .add(interpreter.import('flutter://material/bottom_navigation_bar.ht'));
+    futures.add(interpreter
+        .import('flutter://material/bottom_navigation_bar_theme.ht'));
     futures.add(interpreter.import('flutter://material/bottom_sheet.ht'));
     futures.add(interpreter.import('flutter://material/bottom_sheet_theme.ht'));
     futures.add(interpreter.import('flutter://material/button.ht'));
@@ -2305,7 +2382,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/button_bar_theme.ht'));
     futures.add(interpreter.import('flutter://material/button_style.ht'));
     futures.add(interpreter.import('flutter://material/button_theme.ht'));
-    futures.add(interpreter.import('flutter://material/calendar_date_picker.ht'));
+    futures
+        .add(interpreter.import('flutter://material/calendar_date_picker.ht'));
     futures.add(interpreter.import('flutter://material/card.ht'));
     futures.add(interpreter.import('flutter://material/card_theme.ht'));
     futures.add(interpreter.import('flutter://material/checkbox.ht'));
@@ -2319,7 +2397,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/data_table.ht'));
     futures.add(interpreter.import('flutter://material/data_table_theme.ht'));
     futures.add(interpreter.import('flutter://material/date.ht'));
-    futures.add(interpreter.import('flutter://material/date_picker_deprecated.ht'));
+    futures.add(
+        interpreter.import('flutter://material/date_picker_deprecated.ht'));
     futures.add(interpreter.import('flutter://material/dialog.ht'));
     futures.add(interpreter.import('flutter://material/dialog_theme.ht'));
     futures.add(interpreter.import('flutter://material/divider.ht'));
@@ -2328,7 +2407,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/drawer_header.ht'));
     futures.add(interpreter.import('flutter://material/dropdown.ht'));
     futures.add(interpreter.import('flutter://material/elevated_button.ht'));
-    futures.add(interpreter.import('flutter://material/elevated_button_theme.ht'));
+    futures
+        .add(interpreter.import('flutter://material/elevated_button_theme.ht'));
     futures.add(interpreter.import('flutter://material/elevation_overlay.ht'));
     futures.add(interpreter.import('flutter://material/expand_icon.ht'));
     futures.add(interpreter.import('flutter://material/expansion_panel.ht'));
@@ -2336,8 +2416,10 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/feedback.ht'));
     futures.add(interpreter.import('flutter://material/flat_button.ht'));
     futures.add(interpreter.import('flutter://material/flexible_space_bar.ht'));
-    futures.add(interpreter.import('flutter://material/floating_action_button.ht'));
-    futures.add(interpreter.import('flutter://material/floating_action_button_theme.ht'));
+    futures.add(
+        interpreter.import('flutter://material/floating_action_button.ht'));
+    futures.add(interpreter
+        .import('flutter://material/floating_action_button_theme.ht'));
     futures.add(interpreter.import('flutter://material/flutter_logo.ht'));
     futures.add(interpreter.import('flutter://material/grid_tile.ht'));
     futures.add(interpreter.import('flutter://material/grid_tile_bar.ht'));
@@ -2349,21 +2431,27 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/ink_splash.ht'));
     futures.add(interpreter.import('flutter://material/ink_well.ht'));
     futures.add(interpreter.import('flutter://material/input_border.ht'));
-    futures.add(interpreter.import('flutter://material/input_date_picker_form_field.ht'));
+    futures.add(interpreter
+        .import('flutter://material/input_date_picker_form_field.ht'));
     futures.add(interpreter.import('flutter://material/input_decorator.ht'));
     futures.add(interpreter.import('flutter://material/list_tile.ht'));
     futures.add(interpreter.import('flutter://material/material.ht'));
     futures.add(interpreter.import('flutter://material/material_button.ht'));
-    futures.add(interpreter.import('flutter://material/material_localizations.ht'));
+    futures.add(
+        interpreter.import('flutter://material/material_localizations.ht'));
     futures.add(interpreter.import('flutter://material/material_state.ht'));
     futures.add(interpreter.import('flutter://material/mergeable_material.ht'));
     futures.add(interpreter.import('flutter://material/navigation_rail.ht'));
-    futures.add(interpreter.import('flutter://material/navigation_rail_theme.ht'));
+    futures
+        .add(interpreter.import('flutter://material/navigation_rail_theme.ht'));
     futures.add(interpreter.import('flutter://material/outlined_button.ht'));
-    futures.add(interpreter.import('flutter://material/outlined_button_theme.ht'));
+    futures
+        .add(interpreter.import('flutter://material/outlined_button_theme.ht'));
     futures.add(interpreter.import('flutter://material/outline_button.ht'));
-    futures.add(interpreter.import('flutter://material/page_transitions_theme.ht'));
-    futures.add(interpreter.import('flutter://material/paginated_data_table.ht'));
+    futures.add(
+        interpreter.import('flutter://material/page_transitions_theme.ht'));
+    futures
+        .add(interpreter.import('flutter://material/paginated_data_table.ht'));
     futures.add(interpreter.import('flutter://material/popup_menu.ht'));
     futures.add(interpreter.import('flutter://material/popup_menu_theme.ht'));
     futures.add(interpreter.import('flutter://material/progress_indicator.ht'));
@@ -2393,9 +2481,12 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/text_field.ht'));
     futures.add(interpreter.import('flutter://material/text_form_field.ht'));
     futures.add(interpreter.import('flutter://material/text_selection.ht'));
-    futures.add(interpreter.import('flutter://material/text_selection_theme.ht'));
-    futures.add(interpreter.import('flutter://material/text_selection_toolbar.ht'));
-    futures.add(interpreter.import('flutter://material/text_selection_toolbar_text_button.ht'));
+    futures
+        .add(interpreter.import('flutter://material/text_selection_theme.ht'));
+    futures.add(
+        interpreter.import('flutter://material/text_selection_toolbar.ht'));
+    futures.add(interpreter
+        .import('flutter://material/text_selection_toolbar_text_button.ht'));
     futures.add(interpreter.import('flutter://material/text_theme.ht'));
     futures.add(interpreter.import('flutter://material/theme.ht'));
     futures.add(interpreter.import('flutter://material/theme_data.ht'));
@@ -2403,14 +2494,17 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://material/time_picker.ht'));
     futures.add(interpreter.import('flutter://material/time_picker_theme.ht'));
     futures.add(interpreter.import('flutter://material/toggle_buttons.ht'));
-    futures.add(interpreter.import('flutter://material/toggle_buttons_theme.ht'));
+    futures
+        .add(interpreter.import('flutter://material/toggle_buttons_theme.ht'));
     futures.add(interpreter.import('flutter://material/tooltip.ht'));
     futures.add(interpreter.import('flutter://material/tooltip_theme.ht'));
     futures.add(interpreter.import('flutter://material/typography.ht'));
-    futures.add(interpreter.import('flutter://material/user_accounts_drawer_header.ht'));
+    futures.add(interpreter
+        .import('flutter://material/user_accounts_drawer_header.ht'));
     futures.add(interpreter.import('flutter://painting/alignment.ht'));
     futures.add(interpreter.import('flutter://painting/basic_types.ht'));
-    futures.add(interpreter.import('flutter://painting/beveled_rectangle_border.ht'));
+    futures.add(
+        interpreter.import('flutter://painting/beveled_rectangle_border.ht'));
     futures.add(interpreter.import('flutter://painting/borders.ht'));
     futures.add(interpreter.import('flutter://painting/border_radius.ht'));
     futures.add(interpreter.import('flutter://painting/box_border.ht'));
@@ -2419,7 +2513,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://painting/box_shadow.ht'));
     futures.add(interpreter.import('flutter://painting/circle_border.ht'));
     futures.add(interpreter.import('flutter://painting/colors.ht'));
-    futures.add(interpreter.import('flutter://painting/continuous_rectangle_border.ht'));
+    futures.add(interpreter
+        .import('flutter://painting/continuous_rectangle_border.ht'));
     futures.add(interpreter.import('flutter://painting/debug.ht'));
     futures.add(interpreter.import('flutter://painting/decoration_image.ht'));
     futures.add(interpreter.import('flutter://painting/edge_insets.ht'));
@@ -2433,7 +2528,8 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://painting/inline_span.ht'));
     futures.add(interpreter.import('flutter://painting/matrix_utils.ht'));
     futures.add(interpreter.import('flutter://painting/notched_shapes.ht'));
-    futures.add(interpreter.import('flutter://painting/rounded_rectangle_border.ht'));
+    futures.add(
+        interpreter.import('flutter://painting/rounded_rectangle_border.ht'));
     futures.add(interpreter.import('flutter://painting/shader_warm_up.ht'));
     futures.add(interpreter.import('flutter://painting/shape_decoration.ht'));
     futures.add(interpreter.import('flutter://painting/stadium_border.ht'));
@@ -2459,12 +2555,14 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://rendering/layer.ht'));
     futures.add(interpreter.import('flutter://rendering/layout_helper.ht'));
     futures.add(interpreter.import('flutter://rendering/list_body.ht'));
-    futures.add(interpreter.import('flutter://rendering/list_wheel_viewport.ht'));
+    futures
+        .add(interpreter.import('flutter://rendering/list_wheel_viewport.ht'));
     futures.add(interpreter.import('flutter://rendering/mouse_cursor.ht'));
     futures.add(interpreter.import('flutter://rendering/mouse_tracking.ht'));
     futures.add(interpreter.import('flutter://rendering/object.ht'));
     futures.add(interpreter.import('flutter://rendering/paragraph.ht'));
-    futures.add(interpreter.import('flutter://rendering/performance_overlay.ht'));
+    futures
+        .add(interpreter.import('flutter://rendering/performance_overlay.ht'));
     futures.add(interpreter.import('flutter://rendering/platform_view.ht'));
     futures.add(interpreter.import('flutter://rendering/proxy_box.ht'));
     futures.add(interpreter.import('flutter://rendering/proxy_sliver.ht'));
@@ -2472,12 +2570,15 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://rendering/shifted_box.ht'));
     futures.add(interpreter.import('flutter://rendering/sliver.ht'));
     futures.add(interpreter.import('flutter://rendering/sliver_fill.ht'));
-    futures.add(interpreter.import('flutter://rendering/sliver_fixed_extent_list.ht'));
+    futures.add(
+        interpreter.import('flutter://rendering/sliver_fixed_extent_list.ht'));
     futures.add(interpreter.import('flutter://rendering/sliver_grid.ht'));
     futures.add(interpreter.import('flutter://rendering/sliver_list.ht'));
-    futures.add(interpreter.import('flutter://rendering/sliver_multi_box_adaptor.ht'));
+    futures.add(
+        interpreter.import('flutter://rendering/sliver_multi_box_adaptor.ht'));
     futures.add(interpreter.import('flutter://rendering/sliver_padding.ht'));
-    futures.add(interpreter.import('flutter://rendering/sliver_persistent_header.ht'));
+    futures.add(
+        interpreter.import('flutter://rendering/sliver_persistent_header.ht'));
     futures.add(interpreter.import('flutter://rendering/stack.ht'));
     futures.add(interpreter.import('flutter://rendering/table.ht'));
     futures.add(interpreter.import('flutter://rendering/table_border.ht'));
@@ -2505,13 +2606,16 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://services/platform_channel.ht'));
     futures.add(interpreter.import('flutter://services/platform_views.ht'));
     futures.add(interpreter.import('flutter://services/raw_keyboard.ht'));
-    futures.add(interpreter.import('flutter://services/raw_keyboard_android.ht'));
-    futures.add(interpreter.import('flutter://services/raw_keyboard_fuchsia.ht'));
+    futures
+        .add(interpreter.import('flutter://services/raw_keyboard_android.ht'));
+    futures
+        .add(interpreter.import('flutter://services/raw_keyboard_fuchsia.ht'));
     futures.add(interpreter.import('flutter://services/raw_keyboard_ios.ht'));
     futures.add(interpreter.import('flutter://services/raw_keyboard_linux.ht'));
     futures.add(interpreter.import('flutter://services/raw_keyboard_macos.ht'));
     futures.add(interpreter.import('flutter://services/raw_keyboard_web.ht'));
-    futures.add(interpreter.import('flutter://services/raw_keyboard_windows.ht'));
+    futures
+        .add(interpreter.import('flutter://services/raw_keyboard_windows.ht'));
     futures.add(interpreter.import('flutter://services/restoration.ht'));
     futures.add(interpreter.import('flutter://services/system_channels.ht'));
     futures.add(interpreter.import('flutter://services/system_chrome.ht'));
@@ -2528,18 +2632,23 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://widgets/app.ht'));
     futures.add(interpreter.import('flutter://widgets/async.ht'));
     futures.add(interpreter.import('flutter://widgets/autofill.ht'));
-    futures.add(interpreter.import('flutter://widgets/automatic_keep_alive.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/automatic_keep_alive.ht'));
     futures.add(interpreter.import('flutter://widgets/banner.ht'));
     futures.add(interpreter.import('flutter://widgets/basic.ht'));
     futures.add(interpreter.import('flutter://widgets/binding.ht'));
-    futures.add(interpreter.import('flutter://widgets/bottom_navigation_bar_item.ht'));
+    futures.add(
+        interpreter.import('flutter://widgets/bottom_navigation_bar_item.ht'));
     futures.add(interpreter.import('flutter://widgets/color_filter.ht'));
     futures.add(interpreter.import('flutter://widgets/container.ht'));
-    futures.add(interpreter.import('flutter://widgets/desktop_text_selection_toolbar_layout_delegate.ht'));
+    futures.add(interpreter.import(
+        'flutter://widgets/desktop_text_selection_toolbar_layout_delegate.ht'));
     futures.add(interpreter.import('flutter://widgets/dismissible.ht'));
-    futures.add(interpreter.import('flutter://widgets/draggable_scrollable_sheet.ht'));
+    futures.add(
+        interpreter.import('flutter://widgets/draggable_scrollable_sheet.ht'));
     futures.add(interpreter.import('flutter://widgets/drag_target.ht'));
-    futures.add(interpreter.import('flutter://widgets/dual_transition_builder.ht'));
+    futures.add(
+        interpreter.import('flutter://widgets/dual_transition_builder.ht'));
     futures.add(interpreter.import('flutter://widgets/editable_text.ht'));
     futures.add(interpreter.import('flutter://widgets/fade_in_image.ht'));
     futures.add(interpreter.import('flutter://widgets/focus_manager.ht'));
@@ -2560,59 +2669,73 @@ class FlutterLibraryBinding extends BindingHandler {
     futures.add(interpreter.import('flutter://widgets/implicit_animations.ht'));
     futures.add(interpreter.import('flutter://widgets/interactive_viewer.ht'));
     futures.add(interpreter.import('flutter://widgets/layout_builder.ht'));
-    futures.add(interpreter.import('flutter://widgets/list_wheel_scroll_view.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/list_wheel_scroll_view.ht'));
     futures.add(interpreter.import('flutter://widgets/localizations.ht'));
     futures.add(interpreter.import('flutter://widgets/media_query.ht'));
     futures.add(interpreter.import('flutter://widgets/modal_barrier.ht'));
     futures.add(interpreter.import('flutter://widgets/navigation_toolbar.ht'));
     futures.add(interpreter.import('flutter://widgets/navigator.ht'));
     futures.add(interpreter.import('flutter://widgets/nested_scroll_view.ht'));
-    futures.add(interpreter.import('flutter://widgets/notification_listener.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/notification_listener.ht'));
     futures.add(interpreter.import('flutter://widgets/orientation_builder.ht'));
     futures.add(interpreter.import('flutter://widgets/overflow_bar.ht'));
     futures.add(interpreter.import('flutter://widgets/overlay.ht'));
-    futures.add(interpreter.import('flutter://widgets/overscroll_indicator.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/overscroll_indicator.ht'));
     futures.add(interpreter.import('flutter://widgets/page_storage.ht'));
     futures.add(interpreter.import('flutter://widgets/page_view.ht'));
     futures.add(interpreter.import('flutter://widgets/performance_overlay.ht'));
     futures.add(interpreter.import('flutter://widgets/placeholder.ht'));
     futures.add(interpreter.import('flutter://widgets/platform_view.ht'));
     futures.add(interpreter.import('flutter://widgets/preferred_size.ht'));
-    futures.add(interpreter.import('flutter://widgets/primary_scroll_controller.ht'));
-    futures.add(interpreter.import('flutter://widgets/raw_keyboard_listener.ht'));
+    futures.add(
+        interpreter.import('flutter://widgets/primary_scroll_controller.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/raw_keyboard_listener.ht'));
     futures.add(interpreter.import('flutter://widgets/reorderable_list.ht'));
     futures.add(interpreter.import('flutter://widgets/restoration.ht'));
-    futures.add(interpreter.import('flutter://widgets/restoration_properties.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/restoration_properties.ht'));
     futures.add(interpreter.import('flutter://widgets/router.ht'));
     futures.add(interpreter.import('flutter://widgets/routes.ht'));
     futures.add(interpreter.import('flutter://widgets/safe_area.ht'));
     futures.add(interpreter.import('flutter://widgets/scrollable.ht'));
     futures.add(interpreter.import('flutter://widgets/scrollbar.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_activity.ht'));
-    futures.add(interpreter.import('flutter://widgets/scroll_configuration.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/scroll_configuration.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_controller.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_metrics.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_notification.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_physics.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_position.ht'));
-    futures.add(interpreter.import('flutter://widgets/scroll_position_with_single_context.ht'));
+    futures.add(interpreter
+        .import('flutter://widgets/scroll_position_with_single_context.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_simulation.ht'));
     futures.add(interpreter.import('flutter://widgets/scroll_view.ht'));
     futures.add(interpreter.import('flutter://widgets/semantics_debugger.ht'));
     futures.add(interpreter.import('flutter://widgets/shortcuts.ht'));
-    futures.add(interpreter.import('flutter://widgets/single_child_scroll_view.ht'));
-    futures.add(interpreter.import('flutter://widgets/size_changed_layout_notifier.ht'));
+    futures.add(
+        interpreter.import('flutter://widgets/single_child_scroll_view.ht'));
+    futures.add(interpreter
+        .import('flutter://widgets/size_changed_layout_notifier.ht'));
     futures.add(interpreter.import('flutter://widgets/sliver.ht'));
     futures.add(interpreter.import('flutter://widgets/sliver_fill.ht'));
-    futures.add(interpreter.import('flutter://widgets/sliver_layout_builder.ht'));
-    futures.add(interpreter.import('flutter://widgets/sliver_persistent_header.ht'));
-    futures.add(interpreter.import('flutter://widgets/sliver_prototype_extent_list.ht'));
+    futures
+        .add(interpreter.import('flutter://widgets/sliver_layout_builder.ht'));
+    futures.add(
+        interpreter.import('flutter://widgets/sliver_persistent_header.ht'));
+    futures.add(interpreter
+        .import('flutter://widgets/sliver_prototype_extent_list.ht'));
     futures.add(interpreter.import('flutter://widgets/spacer.ht'));
     futures.add(interpreter.import('flutter://widgets/table.ht'));
     futures.add(interpreter.import('flutter://widgets/text.ht'));
     futures.add(interpreter.import('flutter://widgets/texture.ht'));
     futures.add(interpreter.import('flutter://widgets/text_selection.ht'));
-    futures.add(interpreter.import('flutter://widgets/text_selection_toolbar_layout_delegate.ht'));
+    futures.add(interpreter
+        .import('flutter://widgets/text_selection_toolbar_layout_delegate.ht'));
     futures.add(interpreter.import('flutter://widgets/ticker_provider.ht'));
     futures.add(interpreter.import('flutter://widgets/title.ht'));
     futures.add(interpreter.import('flutter://widgets/transitions.ht'));
diff --git a/lib/src/binding_handler.dart b/lib/src/binding_handler.dart
index f2c54d6..46275df 100644
--- a/lib/src/binding_handler.dart
+++ b/lib/src/binding_handler.dart
@@ -24,13 +24,20 @@ class DefaultBindingHander extends FlutterLibraryBinding {
     super.loadExternalFunctionTypes();
 
     final functionWrappers = <String, HTExternalFunctionTypedef>{
-      'ValueChangedInt': (HTFunction function) => (int data) => function.call(positionalArgs: [data]),
-      'ValueChangedDouble': (HTFunction function) => (double data) => function.call(positionalArgs: [data]),
-      'ValueChangedString': (HTFunction function) => (String data) => function.call(positionalArgs: [data]),
-      'ValueChangedBool': (HTFunction function) => (bool data) => function.call(positionalArgs: [data]),
-      'ValueChangedList': (HTFunction function) => (List data) => function.call(positionalArgs: [data]),
-      'ValueChangedMap': (HTFunction function) => (Map data) => function.call(positionalArgs: [data]),
-      'ValueChangedSet': (HTFunction function) => (Set data) => function.call(positionalArgs: [data]),
+      'ValueChangedInt': (HTFunction function) =>
+          (int data) => function.call(positionalArgs: [data]),
+      'ValueChangedDouble': (HTFunction function) =>
+          (double data) => function.call(positionalArgs: [data]),
+      'ValueChangedString': (HTFunction function) =>
+          (String data) => function.call(positionalArgs: [data]),
+      'ValueChangedBool': (HTFunction function) =>
+          (bool data) => function.call(positionalArgs: [data]),
+      'ValueChangedList': (HTFunction function) =>
+          (List data) => function.call(positionalArgs: [data]),
+      'ValueChangedMap': (HTFunction function) =>
+          (Map data) => function.call(positionalArgs: [data]),
+      'ValueChangedSet': (HTFunction function) =>
+          (Set data) => function.call(positionalArgs: [data]),
     };
 
     functionWrappers.forEach((key, value) {
@@ -55,7 +62,7 @@ class DefaultBindingHander extends FlutterLibraryBinding {
     var future = super.importScripts();
     var futures = <Future>[];
     futures.add(future);
-    futures.add(interpreter.import('package://script_widget.ht'));
+    futures.add(interpreter.import('package://widget.ht'));
     return Future.wait(futures);
   }
 }
diff --git a/lib/src/future_handler_binding.dart b/lib/src/future_handler_binding.dart
index df1fb8b..6a87f06 100644
--- a/lib/src/future_handler_binding.dart
+++ b/lib/src/future_handler_binding.dart
@@ -10,12 +10,16 @@ class FutureHandlerClassBinding extends HTExternalClass {
       case 'FutureHandler':
         return ({positionalArgs, namedArgs, typeArgs}) => FutureHandler();
       case 'FutureHandler.handle':
-        return ({positionalArgs, namedArgs, typeArgs}) => FutureHandler.handle(positionalArgs[0], positionalArgs[1]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            FutureHandler.handle(positionalArgs[0], positionalArgs[1]);
       case 'FutureHandler.make':
-        return ({positionalArgs, namedArgs, typeArgs}) => FutureHandler.make(positionalArgs[0],
-            posArgs: namedArgs['posArgs'], namedArgs: namedArgs['namedArgs'], typeArgs: namedArgs['typeArgs']);
+        return ({positionalArgs, namedArgs, typeArgs}) => FutureHandler.make(
+            positionalArgs[0],
+            posArgs: namedArgs['posArgs'],
+            namedArgs: namedArgs['namedArgs'],
+            typeArgs: namedArgs['typeArgs']);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/src/script_container.dart b/lib/src/script_container.dart
index 71e1a4f..bdc2e91 100644
--- a/lib/src/script_container.dart
+++ b/lib/src/script_container.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
-import 'package:hetu_script/hetu_script.dart';
+import 'package:hetu_script/src/instance.dart';
 import 'package:flutter/material.dart';
 
 class ScriptContainer extends StatefulWidget {
@@ -15,7 +15,8 @@ class ScriptContainer extends StatefulWidget {
     if (instance == null) {
       print('rebuild: null');
     } else {
-      print('rebuild: $instance, ${instance.runtimeType}, ${shortHash(instance)}');
+      print(
+          'rebuild: $instance, ${instance.runtimeType}, ${shortHash(instance)}');
       (instance as _ScriptContainerState).rebuild();
     }
   }
@@ -25,7 +26,8 @@ class _ScriptContainerState extends State<ScriptContainer> {
   late HTInstance child;
 
   void debug(String status) {
-    print('[$status] this: [${shortHash(this)}] child: ${child.typeid}[${shortHash(child)}] ');
+    print(
+        '[$status] this: [${shortHash(this)}] child: ${child.runtimeType}[${shortHash(child)}] ');
   }
 
   void rebuild() {
diff --git a/lib/src/script_container_binding.dart b/lib/src/script_container_binding.dart
index d959812..b69293b 100644
--- a/lib/src/script_container_binding.dart
+++ b/lib/src/script_container_binding.dart
@@ -8,12 +8,14 @@ class ScriptContainerClassBinding extends HTExternalClass {
   dynamic memberGet(String varName, {String from = HTLexicon.global}) {
     switch (varName) {
       case 'ScriptContainer':
-        return ({positionalArgs, namedArgs, typeArgs}) =>
-            ScriptContainer(child: namedArgs['child'], key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
+        return ({positionalArgs, namedArgs, typeArgs}) => ScriptContainer(
+            child: namedArgs['child'],
+            key: namedArgs.containsKey('key') ? namedArgs['key'] : null);
       case 'ScriptContainer.rebuild':
-        return ({positionalArgs, namedArgs, typeArgs}) => ScriptContainer.rebuild(positionalArgs[0]);
+        return ({positionalArgs, namedArgs, typeArgs}) =>
+            ScriptContainer.rebuild(positionalArgs[0]);
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 
@@ -27,13 +29,13 @@ extension ScriptContainerObjectBinding on ScriptContainer {
   dynamic htFetch(String varName) {
     switch (varName) {
       case 'typeid':
-        return const HTTypeId('ScriptWidget');
+        return const HTType('ScriptWidget');
       case 'child':
         return child;
       case 'createState':
         return ({positionalArgs, namedArgs, typeArgs}) => createState();
       default:
-        throw HTErrorUndefined(varName);
+        throw HTError.undefined(varName);
     }
   }
 }
diff --git a/lib/src/script_module_handler.dart b/lib/src/script_module_handler.dart
index 9edc33a..1bf5cfb 100644
--- a/lib/src/script_module_handler.dart
+++ b/lib/src/script_module_handler.dart
@@ -1,4 +1,5 @@
-import 'package:hetu_script/hetu_script.dart' show HTModuleHandler, HTModuleInfo, HTErrorEmpty;
+import 'package:hetu_script/hetu_script.dart'
+    show HTModuleHandler, HTModuleInfo, HTError;
 import 'package:flutter/services.dart' show rootBundle;
 
 class ScriptModuleHandler implements HTModuleHandler {
@@ -25,9 +26,9 @@ class ScriptModuleHandler implements HTModuleHandler {
   Future<HTModuleInfo> import(String key, [String? curUniqueKey]) async {
     var uri = Uri.parse(key);
     var uniqueKey = '';
-    if (uri.scheme.isEmpty) {
+    if (uri.scheme.isEmpty && (curUniqueKey != null)) {
       //相对路径，计算绝对路径
-      var file = curUniqueKey!;
+      var file = curUniqueKey;
       var idx = file.lastIndexOf('/');
       var url = '${file.substring(0, idx)}/$key';
       uri = Uri.parse(url);
@@ -43,7 +44,7 @@ class ScriptModuleHandler implements HTModuleHandler {
     _cachedKeys.add(uniqueKey);
     final content = await rootBundle.loadString(uniqueKey);
     if (content.isEmpty) {
-      throw HTErrorEmpty(uri.toString());
+      throw HTError.empty(uri.toString());
     }
 
     return HTModuleInfo(uniqueKey, content);
diff --git a/pubspec.lock b/pubspec.lock
index eac8150..d319fdd 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -66,7 +66,7 @@ packages:
       name: hetu_script
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.1.0+3"
+    version: "0.1.1+1"
   matcher:
     dependency: transitive
     description:
@@ -95,6 +95,20 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.11.0"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.0"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.0.1"
   sky_engine:
     dependency: transitive
     description: flutter
diff --git a/pubspec.yaml b/pubspec.yaml
index 9d069b4..c71ee39 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -11,7 +11,7 @@ dependencies:
   flutter:
     sdk: flutter
 
-  hetu_script: ^0.1.0+3
+  hetu_script: ^0.1.1+1
 
 dev_dependencies:
   pedantic: ^1.11.0