All classes that implement CheckoutFlowInterface in Commerce Core 8.2
- class \Drupal\commerce_checkout\Plugin\Commerce\CheckoutFlow\CheckoutFlowBase implements CheckoutFlowInterface, ContainerFactoryPluginInterface uses AjaxFormTrait
- 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