[flexcoders] Tilelist in Flex 2 - what to use instead of getItemAt()?

[erinwyher]

In Flex 1.5, you use getItemAt() to call functions from the children
of the TileList, but that method no longer exists in F2. Any
suggestions to do this? 

Here is some sample code:

test.mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application 
        xmlns:mx="http://www.adobe.com/2006/mxml";
        xmlns:view="view.*" 
        layout="absolute"
        creationComplete="doInit()">
        <mx:Script>
                <![CDATA[
                        public var arrTest:Array;
                        
                        public function doInit():void {
                                arrTest = [1,2,3,4];
                                myTiles.dataProvider = arrTest;
                        }
                        public function clickedList():void {
                                //myTiles.getItemAt(1).testFunction();
                                //I want to call a function here for a specific 
set of tiles...
how do I do that without getItemAt?
                                //Note: getChildAt does not work either
                        }
                ]]>
        </mx:Script>
<mx:Button label="click me" click="clickedList()"/>

<mx:TileList id="myTiles" width="660" itemRenderer="view.TestComponent"/>

</mx:Application>

TestComponent.mxml 
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"; width="40"
height="30" backgroundColor="#FF3366">
<mx:Script>
        <![CDATA[
                import mx.controls.Alert;
                
                public function testFunction():void {
                        Alert.show('hi');
                }
        ]]>
</mx:Script>
</mx:Canvas>