notification_popin-1.2.2/notification_popin.links.menu.yml

entity.notification.settings:
  title: 'Notification'
  description: 'Configure a Notification entity type.'
  route_name:  entity.notification.settings
  parent: system.admin_structure

entity.notification.collection:
  title: 'Notifications'
  description: 'List of notifications.'
  route_name: entity.notification.collection
  parent: system.admin_content