@Override
 public void fillActionBars(IActionBars actionBar) {
   super.fillActionBars(actionBar);
   referencesGroup.fillActionBars(actionBar);
 }
 @Override
 public void setContext(ActionContext context) {
   referencesGroup.setContext(context);
 }
 @Override
 public void dispose() {
   referencesGroup.dispose();
   super.dispose();
 }
 @Override
 public void fillContextMenu(IMenuManager menu) {
   super.fillContextMenu(menu);
   menu.add(new Separator());
   referencesGroup.fillContextMenu(menu);
 }