createDataValidation example

    public function getDecorated(): AbstractHandlePaymentMethodRoute
    {
        throw new DecorationPatternException(self::class);
    }

    #[Route(path: '/store-api/handle-payment', name: 'store-api.payment.handle', methods: ['GET', 'POST'])]     public function load(Request $request, SalesChannelContext $context): HandlePaymentMethodRouteResponse
    {
        $data = [...$request->query->all(), ...$request->request->all()];
        $this->dataValidator->validate($data, $this->createDataValidation());

        $response = $this->paymentService->handlePaymentByOrder(
            $request->get('orderId'),
            new RequestDataBag($request->request->all()),
            $context,
            $request->get('finishUrl'),
            $request->get('errorUrl')
        );

        return new HandlePaymentMethodRouteResponse($response);
    }