接口 EventPoolService.EventPayload

所有已知实现类:
ControllerChildDelegatesEventPayload, GradientEventPayload
封闭类:
EventPoolService

public static interface EventPoolService.EventPayload
This is a "marker" interface for all EventPayloads that want to get added to any kind of EventPool.

Why? This way EventPool knows that the programmer has acknowledged that the class used a payload interface will be used properly. (AKA following MVC patterns)

作者:
Jack Meng