title: I creat a custom advancedatagridgroupitemrenderer which using HierarchicalData as dataprovide ,but it does't work
body: <p>I creat a custom advancedatagridgroupitemrenderer which using HierarchicalData as my dataprovide ;</p>
  
  <h2>my itemrenderer like this:</h2>
  
  <p>public class XwjsjglAdvancedDgGroupItemRenderer extends AdvancedDataGridGroupItemRenderer{
          public function XwjsjglAdvancedDgGroupItemRenderer()
          {
              super();
          }</p>
  
  <pre><code>    override public function set data(v:Object):void{
          super.data = v;
      }
      protected var img:Image;
      override protected function createChildren():void{
          super.createChildren();
          img= new Image();           
          img.source="/assets/images/indexNow/jsjhc.png";
  
          this.addChild(DisplayObject(img));      
      }       
  
  
      override protected function updateDisplayList(unscaledWidth:Number,
                                                    unscaledHeight:Number):void
      {
          super.updateDisplayList(unscaledWidth,unscaledHeight);
  
          img.x = label.x + 2;
          img.y = label.y + 2;
          label.x = img.x + 70;
      }
  
      override protected function commitProperties():void
      {
          super.commitProperties();
           }
  
      override protected function measure():void
      {
          super.measure();
          measuredWidth += 90;
          measuredHeight+= 90;
      }
  
  }
  </code></pre>
  
  <p>and the runing effect is this:
   <a href="http://i.stack.imgur.com/Bj1B5.png" rel="nofollow">http://i.stack.imgur.com/Bj1B5.png</a></p>
  
  <p>how can i do ?Any help with this issue would be greatly appreciated.</p>