All classes that implement WebformPluginManagerExcludedInterface in Webform 6.x
- class \Drupal\webform\Plugin\WebformElementManager implements FallbackPluginManagerInterface, WebformElementManagerInterface uses CategorizingPluginManagerTrait
- class \Drupal\webform\Plugin\WebformExporterManager implements WebformExporterManagerInterface uses CategorizingPluginManagerTrait
- class \Drupal\webform\Plugin\WebformHandlerManager implements WebformHandlerManagerInterface uses CategorizingPluginManagerTrait
- class \Drupal\webform\Plugin\WebformVariantManager implements WebformVariantManagerInterface uses CategorizingPluginManagerTrait