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Inline data provider for DataGrid

<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">     <mx:DataGrid id="myDG" width="350">         <mx:dataProvider>             <mx:ArrayCollection>                 <mx:source>                     <mx:Object Artist="A" Album="aa" Price="11.99" />                     <mx:Object Artist="B" Album="bb" Price="11.99" />                 </mx:source>             </mx:ArrayCollection>         </mx:dataProvider>         <mx:columns>             <mx:DataGridColumn dataField="Artist" />             <mx:DataGridColumn dataField="Album" />             <mx:DataGridColumn id="price" dataField="Price" visible="false" />         </mx:columns>     </mx:DataGrid>     <mx:Button label="Toggle Column" click="price.visible = !price.visible;" /> </mx:Application>