entity_hierarchy-8.x-2.24/modules/entity_hierarchy_microsite/entity_hierarchy_microsite.links.menu.yml

entity.entity_hierarchy_microsite.collection:
  title: 'Microsites'
  route_name: entity.entity_hierarchy_microsite.collection
  description: 'Microsites created using Entity Hierarchies'
  parent: system.admin_structure
  weight: 120

entity_hierarchy_microsite:
  class: \Drupal\entity_hierarchy_microsite\Plugin\Menu\MicrositeMenuItem
  form_class: \Drupal\entity_hierarchy_microsite\Form\MenuLinkContentForm
  deriver: \Drupal\entity_hierarchy_microsite\Plugin\Deriver\MicrositeMenuItemDeriver