interface EventDispatcherInterface

interface EventDispatcherInterface extends PsrEventDispatcherInterface {
    
    /**
     * Dispatches an event to all registered listeners.
     *
     * @template T of object
     *
     * @param T           $event     The event to pass to the event handlers/listeners
     * @param string|null $eventName The name of the event to dispatch. If not supplied,
     *                               the class of $event should be used instead.
     *
     * @return T The passed $event MUST be returned
     */
    public function dispatch(object $event, ?string $eventName = null) : object;

}