単純なトレイトを使用して Symfony\\Component\\EventDispatcher\\EventSubscriberInterface::getSubscribedEvents() を自動化する

class AwesomeSubscriber implements Symfony\Component\EventDispatcher\EventSubscriberInterface
{

    public static function getSubscribedEvents(): array
    {
        return [
            HappyEvent::class => 'happy',
            CoolEvent::class => 'coll',
        ];
    }

    public function happy(HappyEvent $event): void {}

    public function coll(CoolEvent $event): void {}

}

class AwesomeSubscriber implements Symfony\Component\EventDispatcher\EventSubscriberInterface
{
    use AutoEventSubscriberTrait; // <<<--- This is it! ❤️

    public function __invoke(HappyEvent|AnotherEvent $event): void {}

}

class HappySubscriber implements Symfony\Component\EventDispatcher\EventSubscriberInterface
{
    use AutoEventSubscriberTrait;

    public function __invoke(HappyEvent $event): void {}

}

class CoolSubscriber implements Symfony\Component\EventDispatcher\EventSubscriberInterface
{
    use AutoEventSubscriberTrait;

    public function __invoke(CoolEvent $event): void {}

}