bat-8.x-1.x-dev/modules/bat_event/bat_event.links.action.yml

entity.state.add_form:
  route_name: 'entity.state.add_form'
  title: 'Add State'
  appears_on:
    - entity.state.collection

entity.bat_event.add_page:
  route_name: entity.bat_event.add_page
  title: 'Add Event'
  appears_on:
    - entity.bat_event.collection
    - entity.bat_event.canonical

entity.bat_event_type.type_add:
  route_name: entity.bat_event_type.type_add
  title: 'Add event type'
  appears_on:
    - entity.bat_event_type.collection