      * 
      *  @param displayObject Calculate the concatenatedMatrix for this displayObject
      * 
+     *  @param excludingRootSprite Whether to exclude the root's transformation in the calculations.
+     * 
      *  @return The concatenatedMatrix for the displayObject
      * 
      *  @langversion 3.0

     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    public static function getConcatenatedComputedMatrix(displayObject:DisplayObject):Matrix
    {
        return getConcatenatedMatrixHelper(displayObject, true);
    }
    
    /**
     *  @private 
     */ 
    private static function getConcatenatedMatrixHelper(displayObject:DisplayObject, useComputedMatrix:Boolean):Matrix
    {
        var m:Matrix = new Matrix();
        

     *  hierarchy. Walk the parent tree manually, calculating the matrix manually.
     *  
     *  @param displayObject Calculate the concatenatedMatrix for this displayObject
     *  
     *  @param excludingRootSprite Whether to exclude the root's transformation in the calculations.
     * 
     *  @return The concatenatedMatrix for the displayObject
     * 
