anchor.diff:    }
   
     void _configure() {
  -//    _zoomControl = new Ranger.GroupNode.basic();
       _zoomControl = new ZoomGroup.basic();
       addChild(_zoomControl, 10);
       _zoomControl.iconVisible = true;
  +    _zoomControl.zoomIconVisible = true;
       _zoomControl.iconScale = 50.0;
  -    _zoomControl.setPosition(-100.0, -100.0);
  +    //_zoomControl.setPosition(-100.0, -100.0);
  +    _zoomControl.scaleCenter.setValues(50.0, 50.0);
       
       //---------------------------------------------------------------
       // Create nodes.
  
positive.code:   int _loadingCount = 0;
    bool _loaded = false;
  
  //  Ranger.GroupNode _zoomControl;
    ZoomGroup _zoomControl;
    
    GameLayer();
  
negative.code: 
      switch (event.keyCode) {
        case 49: //1
          _zoomControl.currentScale = 1.0;
          return true;
        case 50: //2
          _zoomControl.currentScale = 2.0;
          return true;
        case 51: //3
          _zoomControl.zoomBy(0.1);
          return true;
        case 52: //4
          _zoomControl.zoomBy(-0.1);
          return true;
        case 84: //t
  