events

type Dispatcher interface {
	interfaces.Module
	AddEventListener(eventType EventType, listener *EventListener)
	RemoveEventListener(eventType EventType, listener *EventListener)
	RemoveAllEventListener(eventType EventType)
	DispatchEvent(event *Event)
}

type Event struct {
	Type   EventType
	Object interface{}
}

type EventHandler func(event *Event)

type EventListener struct {
	Handler EventHandler
}

type EventType string