- interface \Drupal\Component\Plugin\DerivativeInspectionInterface
- interface \Drupal\Core\Block\BlockPluginInterface
- interface \Drupal\Core\Layout\LayoutInterface
- interface \Drupal\help\HelpTopicPluginInterface
- interface \Drupal\migrate\Plugin\MigrationInterface
- interface \Drupal\views\Plugin\views\ViewsPluginInterface
- interface \Drupal\workflows\WorkflowTypeInterface