code: func (nc *Conn) ChanSubscribe(subj string, ch chan *Msg) (*Subscription, error) {
  	return nc.subscribe(subj, _EMPTY_, nil, ch, false)
  }
docs: // ChanSubscribe will express interest in the given subject and place
  // all messages received on the channel.
  // You should not close the channel until sub.Unsubscribe() has been called.