Fix types

Signed-off-by: Yevgen Polyak <yevgen.polyak@gmail.com>

ext/dapr-ext-grpc/dapr/ext/grpc/_health_servicer.py

@@ -4,7 +4,7 @@
 from dapr.proto import appcallback_service_v1
 from dapr.proto.runtime.v1.appcallback_pb2 import HealthCheckResponse
 
-HealthCheckCallable = Callable[[], None]
+HealthCheckCallable = Optional[Callable[[], None]]
 
 
 class _HealthCheckServicer(appcallback_service_v1.AppCallbackHealthCheckServicer):
@@ -13,19 +13,19 @@ class _HealthCheckServicer(appcallback_service_v1.AppCallbackHealthCheckServicer
     :class:`App` provides useful decorators to register method, topic, input bindings.
     """
 
+    def __init__(self):
+        self._health_check_cb: Optional[HealthCheckCallable] = None
+
     def register_health_check(self, cb: HealthCheckCallable) -> None:
         if not cb:
             raise ValueError('health check callback must be defined')
         self._health_check_cb = cb
 
-    def __init__(self):
-        self._health_check_cb: Optional[HealthCheckCallable] = None
-
     def HealthCheck(self, request, context):
         """Health check."""
 
         if not self._health_check_cb:
-            context.set_code(grpc.StatusCode.UNIMPLEMENTED)
+            context.set_code(grpc.StatusCode.UNIMPLEMENTED)  # type: ignore
             context.set_details('Method not implemented!')
             raise NotImplementedError('Method not implemented!')
         self._health_check_cb()

ext/dapr-ext-grpc/dapr/ext/grpc/app.py

@@ -20,7 +20,7 @@
 
 from dapr.conf import settings
 from dapr.ext.grpc._servicer import _CallbackServicer, Rule  # type: ignore
-from dapr.ext.grpc._health_servicer import _HealthCheckServicer
+from dapr.ext.grpc._health_servicer import _HealthCheckServicer  # type: ignore
 from dapr.proto import appcallback_service_v1