/**
  * Fills aMenuManager with menu contributions from the {@link NavigatorActionService}.
  *
  * @param aMenuManager A popup menu
  * @see NavigatorActionService#fillContextMenu(IMenuManager)
  */
 protected void fillContextMenu(IMenuManager aMenuManager) {
   ISelection selection = commonNavigator.getCommonViewer().getSelection();
   actionService.setContext(new ActionContext(selection));
   actionService.fillContextMenu(aMenuManager);
 }