isPaymentChangeableByTransactionState example

'orderId' => $orderId,
            'changedPayment' => true,
        ]);

        /** @var OrderEntity|null $order */
        $order = $this->orderRoute->load($request, $context, new Criteria([$orderId]))->getOrders()->first();

        if ($order === null) {
            throw OrderException::orderNotFound($orderId);
        }

        if (!$this->orderService->isPaymentChangeableByTransactionState($order)) {
            throw OrderException::paymentMethodNotChangeable();
        }

        if ($context->getCurrency()->getId() !== $order->getCurrencyId()) {
            $this->contextSwitchRoute->switchContext(
                new RequestDataBag([SalesChannelContextService::CURRENCY_ID => $order->getCurrencyId()]),
                $context
            );

            $context = $this->contextService->get(
                new SalesChannelContextServiceParameters(
                    

throw new EntityNotFoundException('order', $orderId);
        }

        return $order;
    }

    /** * @throws PaymentMethodNotChangeableException */
    private function validatePaymentState(OrderEntity $order): void
    {
        if ($this->orderService->isPaymentChangeableByTransactionState($order)) {
            return;
        }

        throw new PaymentMethodNotChangeableException($order->getId());
    }
}

$stateMachineState = $transaction->getStateMachineState();
        if ($stateMachineState === null) {
            return false;
        }

        return $stateMachineState->getTechnicalName() === OrderTransactionStates::STATE_PAID;
    }

    private function isPaymentChangeable(OrderRouteResponse $orderRouteResponse, AccountEditOrderPage $page): bool
    {
        $isChangeableByResponse = $orderRouteResponse->getPaymentsChangeable()[$page->getOrder()->getId()] ?? true;
        $isChangeableByTransactionState = $this->orderService->isPaymentChangeableByTransactionState($page->getOrder());

        return $isChangeableByResponse && $isChangeableByTransactionState;
    }
}