My\Model\User::nameNew PHP Метод

        public static function nameNew($username)
        {
            //Perform assertions before raising a event
            \Assert\that($username)->notEmpty()->string();
            $uuid = Uuid::uuid4();
            //AggregateRoot::__construct is defined as protected so it can be called in a static factory of
            //an extending class
            $instance = new self();
            //Use AggregateRoot::recordThat method to apply a new Event
            $instance->recordThat(UserWasCreated::occur($uuid->toString(), ['name' => $username]));
            return $instance;
        }

}
namespace {
    //Set up an EventStore with an InMemoryAdapter (Only useful for testing, persistent adapters for ProophEventStore are available)
    use My\Infrastructure\UserRepositoryImpl;
    use My\Model\User;
    use Prooph\Common\Event\ActionEvent;
    use Prooph\Common\Event\ProophActionEventEmitter;
    use Prooph\EventStore\Adapter\InMemoryAdapter;
    use Prooph\EventStore\EventStore;
    $eventStore = new EventStore(new InMemoryAdapter(), new ProophActionEventEmitter());
    //Now we set up our user repository and inject the EventStore
    //Normally this should be done in an IoC-Container and the receiver of the repository should require My\Model\UserRepository
    $userRepository = new UserRepositoryImpl($eventStore);
    //Ok lets start a new transaction and create a user
    $eventStore->beginTransaction();
    $user = User::nameNew('John Doe');
    $userRepository->add($user);
    //Before we commit the transaction let's attach a listener to check that the UserWasCreated event is published after commit
    $eventStore->getActionEventEmitter()->attachListener('commit.post', function (ActionEvent $event) {
        foreach ($event->getParam('recordedEvents', new \ArrayIterator()) as $streamEvent) {
            echo sprintf("Event with name %s was recorded. It occurred on %s UTC /// ", $streamEvent->messageName(), $streamEvent->createdAt()->format('Y-m-d H:i:s'));
        }
    });
    $eventStore->commit();
    $userId = $user->userId();
    unset($user);
    //Ok, great. Now let's see how we can grab the user from the repository and change the name
    //First we need to start a new transaction
    $eventStore->beginTransaction();
    //The repository automatically tracks changes of the user...
    $loadedUser = $userRepository->get($userId);