Event4 SourceCode GPL - https://github.com/iboxdb/db4o-gpl

All Known Implementing Classes:

Event4Impl, EventRegistryImpl.CommittedEvent
```
public interface Event4<T extends EventArgs>
```
An event. Holds a list of EventListener4 objects which receive EventListener4.onEvent(Event4, EventArgs) notifications whenever this event is triggered.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addListener(EventListener4<T> listener)`	Adds a new listener to the notification list..
`void`	`removeListener(EventListener4<T> listener)`	Removes a previously registered listener from the notification list.

- Method Detail
  - addListener
```
void addListener(EventListener4<T> listener)
```
    Adds a new listener to the notification list..
  - removeListener
```
void removeListener(EventListener4<T> listener)
```
    Removes a previously registered listener from the notification list.