modal_form_example.form:
  path: '/admin/config/example_form'
  defaults:
    _form: 'Drupal\modal_form_example\Form\ExampleForm'
    _title: 'Example Form'
  requirements:
    _permission: 'administer site configuration'

modal_form_example.open_modal_form:
  path: '/admin/config/modal_form'
  defaults:
    _title: 'Modal Form'
    _controller: '\Drupal\modal_form_example\Controller\ModalFormExampleController::openModalForm'
  requirements:
    _permission: 'administer site configuration'
  options:
    _admin_route: TRUE