CacheableRouteProviderInterface.php

<?php

namespace Drupal\Core\Routing;


/**
 * Extends the router provider interface to provide caching support.
 */
interface CacheableRouteProviderInterface extends RouteProviderInterface {
    
    /**
     * Adds a cache key part to be used in the cache ID of the route collection.
     *
     * @param string $cache_key_provider
     *   The provider of the cache key part.
     * @param string $cache_key_part
     *   A string to be used as a cache key part.
     */
    public function addExtraCacheKeyPart($cache_key_provider, $cache_key_part);

}