a12s-1.0.0-beta7/modules/layout/a12s_layout.links.action.yml

entity.a12s_layout_display_options.add_form:
  route_name: 'entity.a12s_layout_display_options.add_form'
  title: 'Add display options instance'
  appears_on:
    - entity.a12s_layout_display_options.collection