text: <?php
  
  /**
   * @copyright Copyright (C) eZ Systems AS. All rights reserved.
   * @license For full copyright and license information view LICENSE file distributed with this source code.
   */
  namespace eZ\Publish\API\Repository\Values\User;
  
  /**
   *  This interface represents a user reference for use in sessions and Repository.
   */
  interface UserReference
  {
      /**
       * The User id of the User this reference represent.
       *
       * @return mixed
       */
      public function getUserId();
  }
  