simplytest-8.x-4.x-dev/modules/simplytest_projects/simplytest_projects.links.menu.yml

simplytest_projects_collection_menu:
  title: 'Simplytest Projects'
  route_name: entity.simplytest_project.collection
  description: 'List of Project entities'
  parent: system.admin_content

simplytest_projects_add_project:
  title: 'Add Project'
  route_name: entity.simplytest_project.add_form
  description: 'Add a new Simplytest project'
  parent: simplytest_projects_collection_menu

simplytest_projects_settings_form:
  title: 'Settings'
  parent: simplytest_projects_collection_menu
  route_name: simplytest_projects.settings