MenuStorage.php

<?php

namespace Drupal\system;

use Drupal\Core\Config\Entity\ConfigEntityStorage;

/**
 * Defines the storage class for menu configuration entities.
 */
class MenuStorage extends ConfigEntityStorage {
    
    /**
     * Menu names have a maximum length of 32.
     *
     * This is based on:
     * - menu_tree table schema definition,
     * - \Drupal\Core\Config\Entity\ConfigEntityStorage::MAX_ID_LENGTH
     * - menu_name base field on the Menu Link content entity.
     *
     * @see \Drupal\Core\Menu\MenuTreeStorage::schemaDefinition()
     * @see \Drupal\menu_link_content\Entity\MenuLinkContent::baseFieldDefinitions()
     */
    const MAX_ID_LENGTH = 32;

}