flex get canvas id?

Question

I'm developing an engine to generate components.

I been wanting to get my xml script that read and create a component to be load into 'content' canvas. I not sure how do I get the addChild work correctly as in 'content'.addChild instead of the one shown below:

private function sidebar():void {
 xmlReq = new URLRequest("sidebar.xml");
 callReq(content);
}

private function callReq(cholder:Canvas):void {
getHolder = cholder;
getHolder.addChild(...)
}

<mx:Canvas x="0" y="123" width="100%" height="200" id="content">
 </mx:Canvas>

Answer 1

Start by Changing

getHolder = cholder;

to

var getHolder:Canvas = cholder;