From review: https://source.jboss.org/cru/REV-RF-5/#c170
Note that this processEvent(SystemEvent) method has same signature as processEvent(ComponentSystemEvent) method above.
Both needs to implemented in order to implement interfaces, but since ComponentSystemEvent class extends SystemEvent,
it may be safer to delegate from processEvent(ComponentSystemEvent) to processEvent(SystemEvent)
and then check for identity of event (event instanceof ComponentSystemEvent), otherwise, some JDK may fail to call correct method.