Debug.println(this + " stopped");
Debug.println(Debug.LOW, this + ": stopped");
    public void stopDownlink() {        this.stop = true;        try {            this.objectInputStream.close();        }        catch (java.io.IOException e) {            Debug.println(this + ": error while stopping " + e);        }        Debug.println(this + " stopped");        this.setDownlinkOwner(null);    }