 import flash.utils.getQualifiedClassName;
 import flash.utils.getQualifiedSuperclassName;
 
+import mx.controls.AdvancedDataGrid;
 import mx.controls.listClasses.BaseListData;
 import mx.controls.listClasses.IDropInListItemRenderer;
 import mx.controls.listClasses.IListItemRenderer;

    /**
     *  @private
     */
    private var _listData:BaseListData;

    [Bindable("dataChange")]
    

     */
    private var invalidateSizeFlag:Boolean = false;
	
    //--------------------------------------------------------------------------
    //
    //  Overridden properties: UIComponent
