      *         // OR
      *         parallel: [<asyncDef>, ... ]
      *
+     *         success : function():void {},  // optional
      *         error   : function():void {},  // optional
      *         anyway  : function():void {}   // optional
      *     }

     *             ]},
     *             function_7
     *         ],
     *         error  : _onErrorHandler,
     *         anyway : _onFinallyHandler
     *     });

     *     [Sequence]:
     *                   |3 ------>|
     *                   |         |
     *         1 -> 2 -> |4 ------>| -> 7 -> success -> anyway
     *                   |         |        (or error)
     *                   |5 -> 6 ->|
     *
     * </pre>
