     /** 
      *  This is called by addItemAt and when the source is initially
      *  assigned.
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 9
+     *  @playerversion AIR 1.1
+     *  @productversion Flex 3
      */
     private function startTrackUpdates(item:Object):void
     {


    /**
     *  Not Supported in Tree.
     */
    public function get filterFunction():Function
    {


    /**
     *  Not Supported in Tree.
     *  
     *  @langversion 3.0
     *  @playerversion Flash 9
     *  @playerversion AIR 1.1
     *  @productversion Flex 3
     */
    public function set filterFunction(value:Function):void
    {
