```
public interface EventManager
```
EventManager implements the event subsystem. Events are used for communication between modules or business objects. Compared to messages, events are only available on the client side but have more features than messages. Events can have a time to live and therefore can represent a state (i.e. are persistent for n frames or permanently, exclusively overwriting an existing event of the same type or accumulating) or are classic one-shot events even delivered still in the same frame (i.e. priority events). Although this manager contains methods to iterate over / peeking / draining events, the standard way is to subscribe on events from a module and getting callbacks.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Iterator<Event>`	`drainPriorityEvents()`
`void`	`fire(Event event)`	Fires an event
`<T extends Event> T`	`first(Class<T> clazz)`	Returns the first regular (non-priority) event of a specific type
`void`	`invalidate()`	Invalidates all regular (non-priority) events.
`void`	`invalidate(Event event)`	Invalidates a specific (non-priority) event
`void`	`invalidate(Class<? extends Event> clazz)`	Invalidates all regular (non-priority) events of a specific type
`Iterator<Event>`	`iterator()`	Returns an iterator over all regular (non-priority) events
`<T extends Event> Iterator<T>`	`iterator(Class<T> clazz)`	Returns an iterator over all regular (non-priority) events of a specific type
`Iterator<Event>`	`peekPriorityEvents()`	Peeks all priority events without draining them

Interface EventManager