foo.php

class UserService
{
    public function __construct(ObjectManager $manager, UserRepository $repo, EmailService $email, PaymentService $payment, SmsService $sms)
    {
        //
    }
    
    public function register(User $user)
    {
        $manager->persist($user);
        $manager->flush();
        
        $this->sendRegistrationEmail($user);
        $this->sendSmsNotification($user);
        $this->subscribeToPayment($user);
    }
}

class UserService
{
    public function __construct(ObjectManager $manager, UserRepository $repo)
    {
        //
    }
    
    public function register(User $user)
    {
        $manager->persist($user);
        $manager->flush();
        
        $this->evm->trigger('registered', new UserEvent($user))
    }
}