if (!processingTickEvent) processNextTickEvent();
    public void render(int w, int h, Graphics2D g2) {        if (!initialized)            return;        super.render(w,h,g2);        root.draw(g2);        Transition t;        for (Iterator ii=transitions.iterator(); ii.hasNext();) {           t = (Transition) ii.next();           t.draw(g2);        }        if (!processingTickEvent)            processNextTickEvent();    }