interface MenuActiveTrailInterface

interface MenuActiveTrailInterface {
    
    /**
     * Gets the active trail IDs of the specified menu tree.
     *
     * @param string|null $menu_name
     *   (optional) The menu name of the requested tree. If omitted, all menu
     *   trees will be searched.
     *
     * @return array
     *   An array containing the active trail: a list of plugin IDs.
     */
    public function getActiveTrailIds($menu_name);
    
    /**
     * Fetches a menu link which matches the route name, parameters and menu name.
     *
     * @param string|null $menu_name
     *   (optional) The menu within which to find the active link. If omitted, all
     *   menus will be searched.
     *
     * @return \Drupal\Core\Menu\MenuLinkInterface|null
     *   The menu link for the given route name, parameters and menu, or NULL if
     *   there is no matching menu link or the current user cannot access the
     *   current page (i.e. we have a 403 response).
     */
    public function getActiveLink($menu_name = NULL);

}