scmsg-8.x-1.1/simple_cool_message.routing.yml

simple_cool_message.simple_cool_message:
  path: '/admin/config/user-interface/simple-cool-message'
  defaults:
    _form: '\Drupal\simple_cool_message\Form\SimpleCoolMessage'
    _title: 'Simple Cool Message'
  requirements:
    _permission: 'access administration pages'
  options:
    _admin_route: TRUE