setCustomerGroupId example

        $invalidSalesChannelId = Uuid::randomHex();
        $paymentMethodId = Uuid::randomHex();
        $customerGroupId = Uuid::randomHex();
        $shippingMethodId = Uuid::randomHex();
        $currencyId = Uuid::randomHex();
        $countryStateId = Uuid::randomHex();
        $countryId = Uuid::randomHex();

        $salesChannelEntity = new SalesChannelEntity();
        $salesChannelEntity->setUniqueIdentifier(TestDefaults::SALES_CHANNEL);
        $salesChannelEntity->setCustomerGroupId($customerGroupId);
        $salesChannelEntity->setPaymentMethodId($paymentMethodId);
        $salesChannelEntity->setShippingMethodId($shippingMethodId);

        $currency = new CurrencyEntity();
        $rounding = new CashRoundingConfig(1, 1, true);
        $currency->setUniqueIdentifier($currencyId);
        $currency->setTotalRounding($rounding);
        $currency->setItemRounding($rounding);
        $currency->setId($currencyId);
        $currency->setFactor(1);