EventDispatcher implements not only the Meditor but also the Observer design pattern

[jockhip12]

question: 'Which design pattern implements the EventDispatcher component?' answers:

• {value: Adapter, correct: false}
• {value: Decorator, correct: false}
• {value: Observer, correct: true}
• {value: Mediator, correct: true}

https://symfony.com/doc/current/components/event_dispatcher.html