All classes that implement MenuLinkTreeInterface in Drupal 9
- class \Drupal\Core\Menu\MenuLinkTree implements MenuLinkTreeInterface
- class \Drupal\colossal_menu\Menu\MenuLinkTree
- class \Drupal\menu_token\Service\MenuLinkTreeMenuToken
- class \Drupal\sitemap\Menu\SitemapMenuLinkTree
- class \Drupal\toolbar\Menu\ToolbarMenuLinkTree