package
{
	import mx.controls.ComboBox;
	import mx.controls.listClasses.IDropInListItemRenderer;
    import mx.controls.listClasses.IListItemRenderer;
    import mx.core.IDataRenderer;
    import mx.controls.dataGridClasses.DataGridColumn;
    import mx.controls.advancedDataGridClasses.AdvancedDataGridColumn
	public class MyComboBox extends ComboBox 
	                        implements IDataRenderer, IDropInListItemRenderer,
                            IListItemRenderer
	{
		public function MyComboBox():void
		{
			super()
		}
		override public function set data(value:Object):void
		{
			//super.data = value;
			if(value is DataGridColumn)
			{
				
			}
			else
			{
				super.data = value
			}
		}
	}
}