devportal-8.x-2.0-alpha10/modules/api_reference/devportal_api_reference.routing.yml

devportal.admin_api_ref_config:
  path: '/admin/devportal/config/reference'
  defaults:
    _controller: '\Drupal\system\Controller\SystemController::systemAdminMenuBlockPage'
    link_id: 'devportal.admin_api_ref_config'
    _title: 'API Reference'
  requirements:
    _permission: 'administer devportal'