[5.x] Speared the producer and the consumer

[papac]

Actually, the producer is also the consumer

You should spread this to the producer and consumer.

class Producer extends ProducerService
{
    public function __construct(private int $user_id)
    {}
}

class Consumer
{
   public function __construct(private UserService $userService){}

   public function process(ProducerService $producer)
   {
      $user_id = $producer->getUser();
      $userService->sendEmail($user_id);
   }
}