      */
      override mx_internal function addSelectionData(uid:String, selectionData:ListBaseSelectionData):void
      {
-     	// if data is AdvancedDataGridColumn, it means that a header is selected
+        // if data is AdvancedDataGridColumn, it means that a header is selected
         // it should not be added into the list
-    	if (selectionData.data is AdvancedDataGridColumn)
-    		return ;
-    	super.addSelectionData(uid, selectionData);
+        if (selectionData.data is AdvancedDataGridColumn)
+            return ;
+        super.addSelectionData(uid, selectionData);
      }
      
      /**

        lastPt = new Point(event.stageX, event.stageY);
        lastPt = listContent.globalToLocal(lastPt);

		/*      var n:int = separators.length;
		    for (var i:int = 0; i < n; i++)
		    {
		    if (separators[i] == event.target)
		    {
		    resizingColumn = optimumColumns[i];
		    break;
		    }
		    }
		
		    if (!resizingColumn)
		    return;
		*/

        resizingColumn = optimumColumns[index];
        var headerItem:IListItemRenderer = getHeaderInfo(optimumColumns[index]).headerItem;

/**
 *  The class to use as the skin that defines the appearance of the  
 *  background of the column headers in a AdvancedDataGrid control.
 * 
 *  <p>The default skin class is based on the theme. For example, with the Halo theme,
 *  the default skin class is <code>mx.skins.halo.DataGridHeaderBackgroundSkin</code>. For the Spark theme, the default skin
 *  class is <code>mx.skins.spark.DataGridHeaderBackgroundSkin</code>.</p>
 *  
 *  @langversion 3.0
 *  @playerversion Flash 9
