PreloadableRouteProviderInterface

class \Drupal\Core\Installer\InstallerRouteProviderLazyBuilder extends \Drupal\Core\Routing\RouteProviderLazyBuilder
class \Drupal\Core\Routing\RouteProvider implements \Drupal\Core\Routing\CacheableRouteProviderInterface, \Drupal\Core\Routing\PreloadableRouteProviderInterface, \Symfony\Component\EventDispatcher\EventSubscriberInterface
class \Drupal\Core\Routing\RouteProviderLazyBuilder implements \Drupal\Core\Routing\PreloadableRouteProviderInterface, \Symfony\Component\EventDispatcher\EventSubscriberInterface