title: How to use ancestor's EventBus if I am extending Widget in GWT?
body: <p>I am extending a <code>ScrollPanel</code> and wish to process my own custom events with this new widget.</p>
  
  <p>I made my own <code>HasMyHandlers</code> interface with two methods <code>fireEvent(MyEvent event)</code> and <code>HandlerRegistration addMyHandler(MyHandler handler)</code>.</p>
  
  <p>First I made a private member <code>SimpleEventBus eventBus</code>, but next thought that the ancestor class should already have it's own copy.</p>
  
  <p>Is it possible to use ancestor's event bus, i.e. to register handlers within it and to fire them according to it?</p>