code: func (e *EventListener) Notify(event *ct.Event) {
  	e.subMtx.RLock()
  	defer e.subMtx.RUnlock()
  	if subs, ok := e.subscribers[event.AppID]; ok {
  		for sub := range subs {
  			sub.Notify(event)
  		}
  	}
  	if event.AppID != "" {
  		// Ensure subscribers not filtering by app get the event
  		if subs, ok := e.subscribers[""]; ok {
  			for sub := range subs {
  				sub.Notify(event)
  			}
  		}
  	}
  }
docs: // Notify notifies all sbscribers of the given event.