code: public void fastForward (long timeDelta)
      {
          if (_tickStamp > 0) {
              log.warning("Egads! Asked to fastForward() during a tick.", new Exception());
          }
  
          for (int ii = 0, nn = _media.size(); ii < nn; ii++) {
              _media.get(ii).fastForward(timeDelta);
          }
      }
docs: If the manager is paused for some length of time, it should be fast forwarded by the
  appropriate number of milliseconds.  This allows media to smoothly pick up where they left
  off rather than abruptly jumping into the future, thinking that some outrageous amount of
  time passed since their last tick.