offsetUnset(string $key) ArrayAccess for unset argument.

mixed offsetGet(string $key) ArrayAccess for argument getter.

Event dispatch(string $eventName,

class ContainerAwareEventDispatcher extends

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

interface EventDispatcherInterface The EventDispatcherInterface is the central point of Symfony's

addSubscriber(

bool isPropagationStopped() Returns whether further event listeners should be triggered.

Event dispatch(string $eventName,

bool hasListeners(string $eventName = null) Checks whether an event has any registered listeners