code: func (es *EventStream) Start() {
  	if es.Events == nil {
  		es.Events = make(chan []Event)
  	}
  
  	// register eventstream in the local registry for later lookup
  	// in C callback
  	cbInfo := registry.Add(es)
  	es.registryID = cbInfo
  	es.uuid = GetDeviceUUID(es.Device)
  	es.start(es.Paths, cbInfo)
  }
docs: // Start listening to an event stream.