rules-8.x-3.x-dev/tests/modules/rules_test_event/rules_test_event.routing.yml

rules_test_event.dispatch_form:
  path: '/dispatch-form'
  defaults:
    _form: '\Drupal\rules_test_event\Form\DispatchForm'
    _title: 'Dispatch Form'
  requirements:
    _permission: 'access content'