VetoableChangeSupport support = new VetoableChangeSupport(source);
VetoableChangeListener proxy = EventHandler.create(
VetoableChangeListener.class, source, "setText");
proxy = new MockVetoableChangeListener();
String propertyName = "label";
VetoableChangeListenerProxy listenerProxy = new VetoableChangeListenerProxy(
propertyName, proxy);
assertFalse(support.hasListeners("label"));