Email.php

1. 8.x drupal/core/lib/Drupal/Core/TypedData/Type/Email.php
2. 8.x drupal/core/vendor/symfony/validator/Symfony/Component/Validator/Constraints/Email.php

<?php

/**
 * @file
 * Contains \Drupal\Core\TypedData\Type\Email.
 */
namespace Drupal\Core\TypedData\Type;


/**
 * The Email data type.
 *
 * The plain value of Email is the email address represented as PHP string.
 */
class Email extends String {

}