Notification.php

<?php
/**
 * Adminhtml AdminNotification controller
 *
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\AdminNotification\Controller\Adminhtml;

/**
 * @api
 * @since 100.0.2
 */
abstract class Notification extends \Magento\Backend\App\AbstractAction
{
    /**
     * Authorization level of a basic admin session
     */
    const ADMIN_RESOURCE = 'Magento_AdminNotification::show_list';
}