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