src/share/classes/java/beans/VetoableChangeSupport.java

@@ -531,11 +531,11 @@
         }
 
         /**
          * {@inheritDoc}
          */
-        public final VetoableChangeListener extract(VetoableChangeListener listener) {
+        public VetoableChangeListener extract(VetoableChangeListener listener) {
             while (listener instanceof VetoableChangeListenerProxy) {
                 listener = ((VetoableChangeListenerProxy) listener).getListener();
             }
             return listener;
         }