Код AS3:
<mx:Script>
<![CDATA[
[Bindable]
private var _myData:Object; //Здесь нужный класс (SomeClass) можно использовать
override public function set data(value:Object):void
{
_myData = value; //as SomeClass
trace("Data set for this renderer:", (value is XML ? value.toXMLString() : value));
super.data = value;
}
]]>
<mx:Script>
<mx:Label text="{_myData.name + String(trace('Executing bindings for Label', _myData.name))}"/>