token-8.x-1.x-dev/tests/modules/token_module_test/token_module_test.routing.yml

token_module_test.browse:
  path: '/token_module_test/browse'
  defaults:
    _controller: '\Drupal\token_module_test\Controller\TokenTreeBrowseController::outputLink'
    _title_callback: '\Drupal\token_module_test\Controller\TokenTreeBrowseController::getTitle'
  requirements:
    _access: 'TRUE'