removeListener(string $eventName, callable $listener) Removes an event listener from the specified

addSubscriberService(string $serviceId, string $class) Adds a service as event subscriber.

getContainer()

addListenerService(string $eventName, array $callback, int $priority) Adds a service as event listener

addListener(string $eventName, callable $listener, int $priority) Adds an event listener that listens

int|null getListenerPriority(string $eventName, callable $listener) Gets the listener priority

bool offsetExists(string $key) ArrayAccess has argument.

int|null getListenerPriority(string $eventName, callable $listener) Gets the listener priority

interface EventSubscriberInterface An EventSubscriber knows himself what events he is interested

class EventDispatcher implements