Registers all event handler methods on the specified instance to receive relevant events. The handler methods
are determined by the {@code EventBus} implementation, typically by using an
{@link hunt.shiro.event.support.EventListenerResolver EventListenerResolver}
(e.g. {@link hunt.shiro.event.support.AnnotationEventListenerResolver AnnotationEventListenerResolver}).
@param subscriber the object whose event handler methods should be registered to receive events.
Registers all event handler methods on the specified instance to receive relevant events. The handler methods are determined by the {@code EventBus} implementation, typically by using an {@link hunt.shiro.event.support.EventListenerResolver EventListenerResolver} (e.g. {@link hunt.shiro.event.support.AnnotationEventListenerResolver AnnotationEventListenerResolver}).
@param subscriber the object whose event handler methods should be registered to receive events.