All classes that implement CheckoutFlowWithPanesInterface in Commerce Core 8.2
- class \Drupal\commerce_checkout\Plugin\Commerce\CheckoutFlow\CheckoutFlowWithPanesBase implements CheckoutFlowWithPanesInterface
- class \Drupal\commerce_checkout\Plugin\Commerce\CheckoutFlow\MultistepDefault
- class \Drupal\commerce_paypal\Plugin\Commerce\CheckoutFlow\PayPalCheckout