         setRowCount(index - startIndex);
         setIndexInView(startIndex, endIndex);
         layoutTarget.setContentSize(contentWidth, llv.end(llv.length - 1));
-        layoutTarget.endVirtualLayout(startIndex, endIndex);
     }
     
 

     *  for the initial layout and then, if it has changed, we loop through 
     *  the layout items again and fix up the x/width values.
     */
    private function updateDisplayListVirtual(startIndex:int = -1):void
    {
        var layoutTarget:GroupBase = target; 
        var eltCount:int = layoutTarget.numLayoutElements;

        }
        
        if (virtualLayout)
            g.invalidateDisplayList();
                
        setIndexInView(i0, i1);
    }
