changeSupport.addPropertyChangeListener(listener);
if (accessibleContainerHandler == null) { accessibleContainerHandler = new AccessibleContainerHandler(); addContainerListener(accessibleContainerHandler); } if (accessibleFocusHandler == null) { accessibleFocusHandler = new AccessibleFocusHandler(); addFocusListener(accessibleFocusHandler); } super.addPropertyChangeListener(listener);
    public void addPropertyChangeListener(PropertyChangeListener listener)    {      changeSupport.addPropertyChangeListener(listener);    }