content_entity_base-8.x-1.x-dev/tests/modules/ceb_test/ceb_test.links.action.yml

entity.ceb_test_content.add_form:
  route_name: entity.ceb_test_content.add_page
  title: 'Add CEB test Content'
  appears_on:
    - entity.ceb_test_content.collection
    - entity.ceb_test_content.canonical

entity.ceb_test_content_type.add_form:
  route_name: 'entity.ceb_test_content_type.add_form'
  title: 'Add a CEB test Content Type'
  appears_on:
    - entity.ceb_test_content_type.collection