/**
  * @param anEvent An event indicating the current selection of the {@link CommonViewer}
  * @see
  *     org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
  */
 public void selectionChanged(SelectionChangedEvent anEvent) {
   if (anEvent.getSelection() instanceof IStructuredSelection) {
     IStructuredSelection structuredSelection = (IStructuredSelection) anEvent.getSelection();
     actionService.setContext(new ActionContext(structuredSelection));
     actionService.fillActionBars(commonNavigator.getViewSite().getActionBars());
   }
 }