         const rendererHeight:Number = unscaledHeight - paddingTop - paddingBottom;
         const maxRendererX:Number = columnHeaderGroup.horizontalScrollPosition + unscaledWidth;
         
-        const allocatedItemRenderers:Vector.<IGridItemRenderer> = new Vector.<IGridItemRenderer>();
-        var createdItemRenderers:Vector.<IGridItemRenderer> = null;
-        
         var columnIndex:int = -1;
         var visibleLeft:Number = 0;
         var visibleRight:Number = 0;

            
            if ((rendererX + rendererWidth) > maxRendererX)
                break;
            
            // allocate and layout a column separator
            

                if (!factory)
                    factory = columnHeaderGroup.headerRenderer;
                renderer = allocateVisualElement(factory) as IGridItemRenderer;
            }
                
            // initialize the renderer
