@Override
    public void removeNotify() {
      super.removeNotify();
      myFileEditor.putUserData(EDITOR_TOOLBAR_KEY, null);

      final MessageBusConnection conn = myBusConnection;
      if (conn != null) {
        myBusConnection = null;
        conn.disconnect();
        myUpdateAlarm.cancelAllRequests();
      }
    }
@Override
    public void removeNotify()