this.uplink = null;
    public final synchronized void stopClientServant() {        this.setDownlink(null);        this.setServer(null);        this.setUser(null);        Uplink old = this.uplink;        if (old != null) {            this.uplink = null;            try {                old.sendMsg(                    new StopClientCommand());            }            catch (java.io.IOException e) {                Debug.println(e);            }            old.stopUplink();        }    }