AdvancedDataGridGroupItemRenderer - is it working?

[mark goldin]

Here is my code:

public class NameRenderer extends AdvancedDataGridGroupItemRenderer
{
public function NameRenderer()
{
super();
}
public override function set data(value:Object):void
{
super.data = value;
if (value)
{
var _icon:Image = new Image();
_icon.source = "........";
_icon.toolTip = "Testing";
addChild(_icon);
_icon.visible = true;
}
}
}

No matter what I do I do not see the icon.
Please help,

Thanks