code: func (whisper *Whisper) processQueue() {
  	var e *Envelope
  	for {
  		select {
  		case <-whisper.quit:
  			return
  
  		case e = <-whisper.messageQueue:
  			whisper.filters.NotifyWatchers(e, false)
  
  		case e = <-whisper.p2pMsgQueue:
  			whisper.filters.NotifyWatchers(e, true)
  		}
  	}
  }
docs: // processQueue delivers the messages to the watchers during the lifetime of the whisper node.