Expanded class hierarchy of ForumNodeBreadcrumbBuilder in Drupal 9
- class \Drupal\forum\Breadcrumb\ForumBreadcrumbBuilderBase implements BreadcrumbBuilderInterface uses StringTranslationTrait
- class \Drupal\forum\Breadcrumb\ForumListingBreadcrumbBuilder
- class \Drupal\forum\Breadcrumb\ForumNodeBreadcrumbBuilder