twig_tweak-8.x-2.8/tests/twig_tweak_test/twig_tweak_test.routing.yml

twig_tweak_test.test:
  path: 'twig-tweak-test'
  defaults:
    _title: 'Twig Tweak Test'
    _controller: '\Drupal\twig_tweak_test\Controller\TwigTweakTestController::build'
  requirements:
    _permission: 'access content'