foo.php

<?php

class UserController
{
  /**
   * @var EntityManagerInterface
   */ 
  private $entityManager;
  
  public function create()
  {
    $user = ...;
    
    $this->entityManager->transactional(function() {
      $this->service1->create($user);
      $this->service2->create($user);
    });
  }
}

@bakura10 when a transactional operation involves more than one table/entity?