How to reference an image which is inside of ArrayList?

Hi,
I have an item renderer which displays an image.
When image is loaded from file I'm just using this : <mx:Image source="...
But how to to reffer the image data (png images) which are inside of ArrayList ?
Thanks!

Taking a guess here:
<mx:Image source="{myList.getItemAt(3)}">
Or
<mx:Image id="someImage">
then in ActionScript:
someImage.source = myList.getItemAt(3);

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