Expanded class hierarchy of WebformElementEntityReferenceInterface in Webform 6.x

interface \Drupal\Component\Plugin\PluginInspectionInterface; interface \Drupal\Core\Plugin\PluginFormInterface; interface \Drupal\Core\Plugin\ContainerFactoryPluginInterface; interface \Drupal\webform\Plugin\WebformEntityInjectionInterface
- interface \Drupal\webform\Plugin\WebformElementInterface
  - interface \Drupal\webform\Plugin\WebformElementEntityReferenceInterface
    interface \Drupal\webform\Plugin\WebformElementEntityOptionsInterface
  - interface \Drupal\webform\Plugin\WebformElementWizardPageInterface

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