      */
     private var _rotationY:MotionPath;
     /**
-     * The MotionPath describing the change in rotation around the y
-     * axis during the effect
+     *  The MotionPath object describing the change in rotation around the y
+     *  axis during the effect.
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     public function get rotationY():MotionPath
     {

     */
    private var _scaleZ:MotionPath;
    /**
     * The MotionPath describing the change in scale in the z direction
     * during the effect
     */
    public function get scaleZ():MotionPath
    {

    }
    
    /**
     *  Adds a MotionPath object to the transform effect with the
     *  given parameters. 
     *  If a MotionPath object 
     *  on the same property already exists, adds the keyframes from the
     *  new MotionPath object into the existing MotionPath object, sorted
     *  by the time values.
     *
     *  @param property The name of the property being animated.
     *
     *  @param valueFrom The initial value of the property.
     *  
     *  @param valueTo The final value of the property.
     *  
     *  @param valueBy An optional parameter that specifies the delta with
     *  which to calculate either the from or to values, if one is omitted. 
     */
    protected function addMotionPath(property:String,
        valueFrom:Number = NaN, valueTo:Number = NaN, valueBy:Number = NaN):void
