      *  provide an accurate bounding rectangle that has valid <code>left</code> and 
      *  <code>right</code> properties.</p>
      * 
-     *  By default this method returns a Rectangle with width=1, height=0, 
-     *  whose right edge is one more than the scrollRect's right edge, 
-     *  and top=0.
+     *  <p>By default this method returns a Rectangle with width=1, height=0, 
+     *  whose right edge is one more than the right edge of the <code>scrollRect</code>, 
+     *  and top=0.</p>
      * 
      *  @param scrollRect The target's scrollRect.
-     *  @return Returns the bounds of the first element that spans or is to
+     *
+     *  @return The bounds of the first element that spans or is to
      *  the right of the scrollRect’s right edge.
      *  
      *  @see #getElementBoundsLeftOfScrollRect

    private var _target:GroupBase;
    
    /**
     *  The GroupBase whose elements are measured, sized and positioned
     *  by this layout.
     * 
     *  <p>Subclasses may override the setter to perform target specific

    }          

    /**
     *  Called by the target after a layout element 
     *  has been added and before the target's size and display list are
     *  validated.   
     *  Layouts that cache per element state, like virtual layouts, can 
     *  override this method to update their cache.
     * 
     *  <p>If the target calls this method, it's only guaranteeing that a
     *  a layout element will exist at the specified index at
     *  <code>updateDisplayList()</code> time, for example a DataGroup
     *  with a virtual layout will call this method when an item is added 
     *  to the targets <code>dataProvider</code>.</p>
     * 
     *  <p>By default, this method does nothing.</p>
     * 
     *  @param index The index of the element that was added.
     * 
     *  @see #elementRemoved    
     *
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
     public function elementAdded(index:int):void
     {
