src/java.desktop/share/classes/java/awt/Container.java

@@ -3849,10 +3849,11 @@
 
         /**
          * The handler to fire {@code PropertyChange}
          * when children are added or removed
          */
+        @SuppressWarnings("serial") // Not statically typed as Serializable
         protected ContainerListener accessibleContainerHandler = null;
 
         /**
          * Fire {@code PropertyChange} listener, if one is registered,
          * when children are added or removed.