gradient_server-1.0.x-dev/modules/contact_apply_for_role/contact_apply_for_role.routing.yml

contact_apply_for_role.approve_role_application:
  path: /admin/structure/contact/messages/{contact_message}/approve
  defaults:
    _controller: 'Drupal\contact_apply_for_role\Controller\ContactController::approveRole'
    _title: 'Approve'
  requirements:
    _entity_bundles: 'contact_message:apply_for_role'
    _entity_access: 'contact_message.view'
    _permission: 'administer users'
    _custom_access: 'Drupal\contact_apply_for_role\Controller\ContactController::approveRoleAccess'
  options:
    _admin_route: true
    parameters:
      contact_message:
        type: entity:contact_message
    no_cache: true