code: @Override
    public void invoke(InboxAmp mailbox, StubAmp actorDeliver)
    {
      // actorDeliver.queryError(_headers, _from, _qid, _exn);
      
      StubAmp actorMessage = _serviceRef.stub();
      
      // kraken/210a vs baratine/2245
      StubAmp actorInvoke = actorDeliver.worker(actorMessage);
      
      // actorInvoke.queryError(_headers, actorMessage, _qid, _exn);
      actorInvoke.queryError(_headers, _from, _qid, _exn);
    }
docs: /*
  @Override
  public ActorAmp getActorInvoke(ActorAmp actorDeliver)
  {
  return actorDeliver;
  }