workflow-8.x-1.x-dev/modules/workflow_cleanup/workflow_cleanup.routing.yml

workflow.cleanup.settings:
  path: '/admin/config/workflow/workflow/cleanup'
  defaults:
    _form: '\Drupal\workflow_cleanup\Form\WorkflowCleanupSettingsForm'
    _title: 'Clean up workflow'
  requirements:
    _permission: 'administer workflow'