diff --git a/README.md b/README.md
index e267152..86d014c 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ dependency:
   <groupId>org.microbean</groupId>
   <artifactId>microbean-event</artifactId>
   <!-- Always check https://search.maven.org/artifact/org.microbean/microbean-event for up-to-date available versions. -->
-  <version>0.0.2</version>
+  <version>0.0.3</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index 446ea61..34a05be 100644
--- a/pom.xml
+++ b/pom.xml
@@ -127,7 +127,7 @@
       <dependency>
         <groupId>org.microbean</groupId>
         <artifactId>microbean-assign</artifactId>
-        <version>0.0.10</version>
+        <version>0.0.11</version>
       </dependency>
 
       <dependency>
@@ -139,7 +139,7 @@
       <dependency>
         <groupId>org.microbean</groupId>
         <artifactId>microbean-bean</artifactId>
-        <version>0.0.21</version>
+        <version>0.0.22</version>
       </dependency>
 
       <dependency>
diff --git a/src/main/java/org/microbean/event/EventQualifiersMatcher.java b/src/main/java/org/microbean/event/EventQualifiersMatcher.java
index 7e28042..bb48d3c 100644
--- a/src/main/java/org/microbean/event/EventQualifiersMatcher.java
+++ b/src/main/java/org/microbean/event/EventQualifiersMatcher.java
@@ -16,11 +16,11 @@
 import java.util.Collection;
 
 import org.microbean.assign.Matcher;
+import org.microbean.assign.Qualifiers;
 
 import org.microbean.attributes.Attributes;
 
-import static org.microbean.assign.Qualifiers.anyQualifier;
-import static org.microbean.assign.Qualifiers.qualifiers;
+import static java.util.Objects.requireNonNull;
 
 /**
  * A {@link Matcher} encapsulating <a
@@ -34,6 +34,14 @@
 public final class EventQualifiersMatcher implements Matcher<Collection<? extends Attributes>, Collection<? extends Attributes>> {
 
 
+  /*
+   * Instance fields.
+   */
+
+
+  private final Qualifiers qualifiers;
+
+
   /*
    * Constructors.
    */
@@ -41,9 +49,14 @@ public final class EventQualifiersMatcher implements Matcher<Collection<? extend
 
   /**
    * Creates a new {@link EventQualifiersMatcher}.
+   *
+   * @param qualifiers a {@link Qualifiers}; must not be {@code null}
+   *
+   * @exception NullPointerException if {@code qualifiers} is {@code null}
    */
-  public EventQualifiersMatcher() {
+  public EventQualifiersMatcher(final Qualifiers qualifiers) {
     super();
+    this.qualifiers = requireNonNull(qualifiers, "qualifiers");
   }
 
 
@@ -76,8 +89,8 @@ public final boolean test(final Collection<? extends Attributes> receiverAttribu
                             final Collection<? extends Attributes> payloadAttributes) {
     // "An event is delivered to an observer method if...the observer method has no event qualifiers or has a subset of
     // the event qualifiers."
-    final Collection<? extends Attributes> receiverQualifiers = qualifiers(receiverAttributes);
-    return receiverQualifiers.isEmpty() || qualifiers(payloadAttributes).containsAll(receiverQualifiers);
+    final Collection<? extends Attributes> receiverQualifiers = qualifiers.qualifiers(receiverAttributes);
+    return receiverQualifiers.isEmpty() || qualifiers.qualifiers(payloadAttributes).containsAll(receiverQualifiers);
   }
 
 }
diff --git a/src/main/java/org/microbean/event/Events.java b/src/main/java/org/microbean/event/Events.java
index 3b313d5..eb1f9b9 100644
--- a/src/main/java/org/microbean/event/Events.java
+++ b/src/main/java/org/microbean/event/Events.java
@@ -23,15 +23,13 @@
 
 import org.microbean.attributes.Attributes;
 
+import org.microbean.bean.Qualifiers;
 import org.microbean.bean.ReferencesSelector;
 
 import org.microbean.construct.Domain;
 
 import static java.util.Objects.requireNonNull;
 
-import static org.microbean.assign.Qualifiers.anyQualifiers;
-import static org.microbean.assign.Qualifiers.qualifiers;
-
 /**
  * A utility class for working with <dfn>events</dfn>.
  *
@@ -39,9 +37,11 @@
  */
 // Deliberately not final.
 public class Events {
-
+  
   private final EventTypes eventTypes;
 
+  private final Qualifiers qualifiers;
+  
   private final EventTypeMatcher eventTypeMatcher;
 
   private final EventQualifiersMatcher eventQualifiersMatcher;
@@ -53,6 +53,8 @@ public class Events {
    *
    * @param eventTypes an {@link EventTypes}; must not be {@code null}
    *
+   * @param qualifiers a {@link Qualifiers}; must not be {@code null}
+   *
    * @param eventTypeMatcher an {@link EventTypeMatcher}; must not be {@code null}
    *
    * @param eventQualifiersMatcher an {@link EventQualifiersMatcher}; must not be {@code null}
@@ -60,10 +62,12 @@ public class Events {
    * @exception NullPointerException if any argument is {@code null}
    */
   public Events(final EventTypes eventTypes,
+                final Qualifiers qualifiers,
                 final EventTypeMatcher eventTypeMatcher,
                 final EventQualifiersMatcher eventQualifiersMatcher) {
     super();
     this.eventTypes = requireNonNull(eventTypes, "eventTypes");
+    this.qualifiers = requireNonNull(qualifiers, "qualifiers");
     this.eventTypeMatcher = requireNonNull(eventTypeMatcher, "eventTypeMatcher");
     this.eventQualifiersMatcher = requireNonNull(eventQualifiersMatcher, "eventQualifiersMatcher");
     final Domain d = eventTypes.domain();
@@ -71,7 +75,7 @@ public Events(final EventTypes eventTypes,
       new AttributedType(d.declaredType(d.typeElement(EventListener.class.getCanonicalName()),
                                         d.wildcardType(),
                                         d.wildcardType(null, d.javaLangObjectType())),
-                         anyQualifiers());
+                         this.qualifiers.anyQualifiers());
   }
 
   /**
@@ -103,14 +107,14 @@ public final void fire(final TypeMirror typeArgumentSource,
                          final Object event,
                          final ReferencesSelector rs) {
     final EventTypeList eventTypes = this.eventTypes.eventTypes(typeArgumentSource, event);
-    final List<Attributes> eventQualifiers = qualifiers(attributes);
+    final List<Attributes> eventQualifiers = this.qualifiers.qualifiers(attributes);
     final Iterator<? extends EventListener<?, ? super Object>> i =
       rs.<EventListener<?, ? super Object>>references(this.eventListenerAttributedType).iterator();
     while (i.hasNext()) {
       final EventListener<?, ? super Object> el = i.next();
       try {
         final AttributedType slot = el.attributedType();
-        if (slot == null || !this.eventQualifiersMatcher.test(qualifiers(slot.attributes()), eventQualifiers)) {
+        if (slot == null || !this.eventQualifiersMatcher.test(this.qualifiers.qualifiers(slot.attributes()), eventQualifiers)) {
           continue;
         }
         final TypeMirror slotType = slot.type();
diff --git a/src/test/java/org/microbean/event/TestJDKFacts.java b/src/test/java/org/microbean/event/TestJDKFacts.java
index 4337014..6c83e2c 100644
--- a/src/test/java/org/microbean/event/TestJDKFacts.java
+++ b/src/test/java/org/microbean/event/TestJDKFacts.java
@@ -22,9 +22,6 @@
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
diff --git a/src/test/java/org/microbean/event/TestLanguageModelFacts.java b/src/test/java/org/microbean/event/TestLanguageModelFacts.java
index d755e8e..43b5b68 100644
--- a/src/test/java/org/microbean/event/TestLanguageModelFacts.java
+++ b/src/test/java/org/microbean/event/TestLanguageModelFacts.java
@@ -16,11 +16,13 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 import javax.lang.model.element.AnnotationMirror;
 import javax.lang.model.element.AnnotationValue;
 import javax.lang.model.element.Element;
 import javax.lang.model.element.ExecutableElement;
+import javax.lang.model.element.Modifier;
 import javax.lang.model.element.TypeElement;
 import javax.lang.model.element.TypeParameterElement;
 
@@ -41,14 +43,14 @@
 import static javax.lang.model.element.ElementKind.CLASS;
 import static javax.lang.model.element.ElementKind.METHOD;
 
+import static javax.lang.model.element.Modifier.ABSTRACT;
+import static javax.lang.model.element.Modifier.PUBLIC;
+
 import static javax.lang.model.type.TypeKind.DECLARED;
-import static javax.lang.model.type.TypeKind.TYPEVAR;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNotSame;
-import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertSame;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -73,12 +75,19 @@ final void testAnnotationMirrorEnclosingAndEnclosedElements() {
     final ExecutableElement element = m.keySet().iterator().next();
     final TypeElement deprecatedElement = (TypeElement)element.getEnclosingElement();
     assertSame(ANNOTATION_TYPE, deprecatedElement.getKind());
+    Set<Modifier> modifiers = deprecatedElement.getModifiers();
+    assertEquals(2, modifiers.size());
+    assertTrue(modifiers.contains(PUBLIC));
+    assertTrue(modifiers.contains(ABSTRACT));
     final List<? extends Element> enclosedElements = deprecatedElement.getEnclosedElements();
     assertEquals(2, enclosedElements.size());
-    enclosedElements.forEach(ee -> assertSame(METHOD, ee.getKind()));
-    System.out.println("*** modifiers: " + deprecatedElement.getModifiers());
-    enclosedElements.forEach(ee -> System.out.println("    modifiers for " + ee + ": " + ee.getModifiers()));
-
+    for (final Element ee : enclosedElements) {
+      assertSame(METHOD, ee.getKind());
+      modifiers = ee.getModifiers();
+      assertEquals(2, modifiers.size());
+      assertTrue(modifiers.contains(PUBLIC));
+      assertTrue(modifiers.contains(ABSTRACT));
+    }
   }
   
   @Test