onlyone-8.x-1.x-dev/onlyone.links.menu.yml

onlyone.config_content_types:
  title: 'Only One'
  route_name: onlyone.config_content_types
  description: 'Configure the content types to allow for Only One node per language.'
  parent: system.admin_config_content
  
onlyone.admin_settings:
  title: 'Settings'
  route_name: onlyone.admin_settings
  description: 'Only One Settings.'
  parent: onlyone.config_content_types