association-1.0.0-alpha2/modules/association_page/association_page.routing.yml

# Route to use for the "field_ui_base_route" for association page entities.
entity.association_page.field_config:
  path: /admin/structure/association/{association_type}/page
  defaults:
    _title: Edit association type
    _entity_form: association_type.edit
    entity_type_id: association_type
  requirements:
    _access: 'FALSE'
  options:
    parameters:
      association_type:
        type: 'entity:association_type'