Expanded class hierarchy of ExpressCheckoutInterface in Commerce PayPal 8
- interface \Drupal\commerce_payment\Plugin\Commerce\PaymentGateway\SupportsAuthorizationsInterface; interface \Drupal\commerce_payment\Plugin\Commerce\PaymentGateway\SupportsRefundsInterface
- interface \Drupal\commerce_paypal\Plugin\Commerce\PaymentGateway\ExpressCheckoutInterface