     function set perElementOffset(value:Number):void;
 
     //----------------------------------
+    //  playheadTime
+    //----------------------------------
+
+    /**
+     *  Current position in time of the effect.
+     *  This property has a value between 0 and the actual duration 
+     *  (which includes the value of the <code>startDelay</code>, 
+     *  <code>repeatCount</code>, and <code>repeatDelay</code> properties).
+     */
+    function get playheadTime():Number;
+
+    //----------------------------------
     //  relevantProperties
     //----------------------------------
 

    //
    //--------------------------------------------------------------------------
    
    //----------------------------------
    //  className
    //----------------------------------

     *  @see mx.effects.EffectInstance#end()
     */
    function end(effectInstance:IEffectInstance = null):void;

    /**
     * Sets the current time of an effect. Seek may be used to
     * fast-forward or reverse to a particular point in time in an effect.
     * 
     * @param seekTime Number of milliseconds that the effect should
     * play at. This number should be between 0 and the duration of the
     * effect.
     * 
     * @see #duration
     */
    function seek(seekTime:Number):void;

    /**
     *  Captures the current values of the relevant properties
