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validateRequest example

return;
        }

        if ($request->attributes->has('_controller')) {
            // Is a sub-request: no need to parse _path but it should still be removed from query parameters as below.             $request->query->remove('_path');

            return;
        }

        if ($event->isMainRequest()) {
            $this->validateRequest($request);
        }

        parse_str($request->query->get('_path', ''), $attributes);
        $request->attributes->add($attributes);
        $request->attributes->set('_route_params', array_replace($request->attributes->get('_route_params', []), $attributes));
        $request->query->remove('_path');
    }

    protected function validateRequest(Request $request): void
    {
        // is the Request safe?

$paymentMethodId = (string) $request->request->get('paymentMethodId');

        $orderId = (string) $request->request->get('orderId');
        $order = $this->loadOrder($orderId, $context);

        $context = $this->orderConverter->assembleSalesChannelContext(
            $order,
            $context->getContext(),
            [SalesChannelContextService::PAYMENT_METHOD_ID => $paymentMethodId]
        );

        $this->validateRequest($context, $paymentMethodId);

        $this->validatePaymentState($order);

        $this->setPaymentMethod($paymentMethodId, $order, $context);

        return new SetPaymentOrderRouteResponse();
    }

    private function setPaymentMethod(string $paymentMethodId, OrderEntity $order, SalesChannelContext $salesChannelContext): void
    {
        $context = $salesChannelContext->getContext();