betasite-1.0.4/modules/betasite_switches/betasite_switches.links.menu.yml

betasite.admin_config_development_betasite:
  title: Beta Site
  route_name: betasite.admin_config_development_betasite
  parent: system.admin_config_development
  description: 'Administer and configure Beta Site features.'
  weight: 5
entity.beta_switch.collection:
  title: 'Beta Switches'
  route_name: entity.beta_switch.collection
  description: 'Create and manage beta switches for site functionality.'
  parent: betasite.admin_config_development_betasite