     }
     
     //----------------------------------
-    //  virtualLayout
-    //----------------------------------
-
-    private var _virtualLayout:Boolean = false;
+    //  useVirtualLayout
+    //----------------------------------
+
+    private var _useVirtualLayout:Boolean = false;
 
     [Inspectable(defaultValue="false")]
 

     *  vertical and horizontalScrollPosition deltas needed to 
     *  scroll the element at the specified index into view.
     * 
     *  If clipContent is true and the element at the specified index is not
     *  entirely visible relative to the target's scrollRect, then 
     *  return the delta to be added to horizontalScrollPosition and
     *  verticalScrollPosition that will scroll the element completely 

     *  @see #elementBoundsRightOfScrollRect
     *  @see #getHorizontalScrollPositionDelta
     */
    public function getHorizontalScrollPositionDelta(scrollUnit:uint):Number
    {
        var g:GroupBase = target;
        if (!g)
