service legacy_router

RegisterRouteEnhancersPass::process in drupal/core/lib/Drupal/Core/DependencyInjection/Compiler/RegisterRouteEnhancersPass.php

Adds services tagged with "route_enhancer" to the router.

class: Symfony\Cmf\Component\Routing\DynamicRouter
arguments:
  - '@router.request_context'
  - '@legacy_url_matcher'
  - '@legacy_generator'