      */
     private const visibleItemRenderersBounds:Rectangle = new Rectangle();
     
-    /**
+	/**
      *  @private
      *  The viewport's bounding rectangle; often smaller then visibleItemRenderersBounds.
      *  Initialized by updateDisplayList with the current scrollPosition, and grid.width,Height.

        
        const hspChanged:Boolean = oldHorizontalScrollPosition != horizontalScrollPosition;
        const vspChanged:Boolean = oldVerticalScrollPosition != verticalScrollPosition;
        
        oldHorizontalScrollPosition = horizontalScrollPosition;
        oldVerticalScrollPosition = verticalScrollPosition;
        
        // Only invalidate if we're clipping and scrollR extends outside visisibleRenderersBounds
        
        const scrollR:Rectangle = grid.scrollRect;
        if (scrollR && !visibleItemRenderersBounds.containsRect(scrollR))
        {
            var reason:String = "none";
            if (vspChanged && hspChanged)

        }
        else
        {
            visibleItemRenderersBounds.setEmpty();
        }
        
        // Update visibleItemRenderers et al
