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ArrayCollection as dataProvider for TabBar

<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">     <mx:Script>                  import mx.events.ItemClickEvent;         import mx.controls.TabBar;         import mx.collections.ArrayCollection;         [Bindable]         private var STATE_ARRAY:ArrayCollection = new ArrayCollection([                                                     {label:"A", data:"AA"},                                                     {label:"B", data:"BB"},                                                     {label:"C", data:"CC"}                                                   ]);         private function clickEvt(event:ItemClickEvent):void {             var targetComp:TabBar = TabBar(event.currentTarget);             forClick.text="label is: " + event.label + " index is: " + event.index + " capital is: " +             targetComp.dataProvider[event.index].data;         }            </mx:Script>     <mx:TabBar id="myTB" itemClick="clickEvt(event);">         <mx:dataProvider>{STATE_ARRAY}</mx:dataProvider>     </mx:TabBar>     <mx:TextArea id="forClick" width="150" /> </mx:Application>