class EventDispatcher implements
interface EventSubscriberInterface An EventSubscriber knows himself what events he is interested
bool hasListeners(string $eventName = null) Checks whether an event has any registered listeners
int|null getListenerPriority(string $eventName, callable $listener) Gets the listener priority
removeListener(string $eventName, callable $listener) Removes an event listener from the specified
stopPropagation() Stops the propagation of the event to further event listeners. If multiple
offsetSet(string $key, mixed $value) ArrayAccess for argument setter.
addSubscriber(
class ContainerAwareEventDispatcher extends
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