code: func (nc *Conn) QueueSubscribe(subj, queue string, cb MsgHandler) (*Subscription, error) {
  	return nc.subscribe(subj, queue, cb, nil, false)
  }
docs: // QueueSubscribe creates an asynchronous queue subscriber on the given subject.
  // All subscribers with the same queue name will form the queue group and
  // only one member of the group will be selected to receive any given
  // message asynchronously.