Classes which implement this interface provide a method
that deals with the event that is generated when a widget
is disposed.
<p>
After creating an instance of a class that :
this interface it can be added to a widget using the
<code>addDisposeListener</code> method and removed using
the <code>removeDisposeListener</code> method. When a
widget is disposed, the widgetDisposed method will
be invoked.
</p>
Classes which implement this interface provide a method that deals with the event that is generated when a widget is disposed. <p> After creating an instance of a class that : this interface it can be added to a widget using the <code>addDisposeListener</code> method and removed using the <code>removeDisposeListener</code> method. When a widget is disposed, the widgetDisposed method will be invoked. </p>
@see DisposeEvent