RefundPayload example

$appPaymentMethod = $paymentMethod->getAppPaymentMethod();
        if ($appPaymentMethod === null) {
            throw PaymentException::asyncProcessInterrupted($orderTransaction->getId(), 'Loaded data invalid');
        }

        return $appPaymentMethod;
    }

    protected function buildRefundPayload(OrderTransactionCaptureRefundEntity $refund, OrderEntity $order): RefundPayload
    {
        return new RefundPayload(
            $refund,
            $order
        );
    }

    protected function buildValidatePayload(Cart $cart, RequestDataBag $requestDataBag, SalesChannelContext $context): ValidatePayload
    {
        return new ValidatePayload(
            $cart,
            $requestDataBag->all(),
            $context,
        );