Expanded class hierarchy of PromotionOfferInterface in Commerce Core 8.2

interface \Drupal\Component\Plugin\ConfigurableInterface; interface \Drupal\Core\Plugin\PluginFormInterface; interface \Drupal\Component\Plugin\PluginInspectionInterface
- interface \Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer\PromotionOfferInterface
  - interface \Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer\OrderItemPromotionOfferInterface
  - interface \Drupal\commerce_promotion\Plugin\Commerce\PromotionOffer\OrderPromotionOfferInterface
  - interface \Drupal\commerce_shipping\Plugin\Commerce\PromotionOffer\ShipmentPromotionOfferInterface

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