wxt-8.x-3.011/modules/custom/wxt_ext/wxt_ext_book/wxt_ext_book.routing.yml

wxt_ext_book.admin_config_wxt_ext_book:
  path: '/admin/config/wxt/wxt_ext_book'
  defaults:
    _form: '\Drupal\wxt_ext_book\Form\WxtBookSettingsForm'
    _title: 'WxT Book Settings'
  requirements:
    _permission: 'administer site configuration'