protected void fireServerStopEvent(ServerStopEvent evt) {
    if (serverStopListenerList != null) {
      Object[] listeners = serverStopListenerList.getListenerList();
      for (int i=0; i<listeners.length; i+=2) {
        if (listeners[i]==ServerStopListener.class) {
          ((ServerStopListener)listeners[i+1]).OnServerStopEvent(evt);
        }
      }
    }
  }