Debug.println(Debug.MEDIUM, this + ": stopped");
    public final void stopClientServant() {        Uplink old = this.uplink;        //verhindert, da stopClientServant mehrmals luft        this.uplink = null;        //Versuch, ein StopClientCommand() zu senden        if (old != null) {            try {                old.sendMsg(                    new StopClientCommand());            }            catch (java.io.IOException e) {                Debug.println(Debug.HIGH, this + " error sending stopClient:" + e);            }            old.stopUplink();        }        //assocs lsen        this.setDownlink(null);        this.setServer(null);        this.setUser(null);        Debug.println(Debug.MEDIUM, this + ": stopped");    }