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Bind with BindingUtils bindSetter

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="initHandler();">        <mx:Script>                               import mx.binding.utils.ChangeWatcher;                   import mx.binding.utils.BindingUtils;                   private var myChangeWatcher:ChangeWatcher;                   private function initHandler():void                   {                        myChangeWatcher = BindingUtils.bindSetter( invalidateName, nameInput, "text" );                   }                   private function invalidateName( arg:* ):void                   {                           nameField.text = nameInput.text;                   }            </mx:Script>     <mx:Panel title="User Entry.">          <mx:TextInput id="nameInput" />          <mx:Text id="nameField" />     </mx:Panel> </mx:Application>