multistep_form_framework-8.x-1.x-dev/modules/multistep_form_framework_examples/multistep_form_framework_examples.routing.yml

multistep_form_framework_examples.book_buy_multistep:
  path: '/post-book'
  defaults:
    _title: 'Buy book'
    _form: 'Drupal\multistep_form_framework_examples\Form\BookBuyMultistepForm'
  requirements:
    _permission: 'access content'