Symfony\Component\EventDispatcher

Classes Summary
Event Event is the base class for classes containing event data. This class contains no event data. It is used by events that do not pass state information to an event handler when an event is raised. You can call the method stopPropagation() to abort the execution of further listeners in your event listener.
Interfaces Summary
EventSubscriberInterface An EventSubscriber knows himself what events he is interested in. If an EventSubscriber is added to an EventDispatcherInterface, the manager invokes {@link getSubscribedEvents} and registers the subscriber as a listener for all returned events.