isSalesChannelCountry example

$errors->add(new ShippingAddressBlockedError((string) $country->getTranslation('name')));

            return;
        }

        if (!$country->getShippingAvailable() && $validateShipping) {
            $errors->add(new ShippingAddressBlockedError((string) $country->getTranslation('name')));

            return;
        }

        if (!$this->isSalesChannelCountry($country->getId(), $context) && $validateShipping) {
            $errors->add(new ShippingAddressBlockedError((string) $country->getTranslation('name')));

            return;
        }

        if ($customer === null) {
            return;
        }

        if ($customer->getActiveBillingAddress() === null || $customer->getActiveShippingAddress() === null) {
            // No need to add salutation-specific errors in this case