getRegistrationSalesChannels example

if (Feature::isActive('v6.6.0.0')) {
            $criteria->getAssociation('registrationSalesChannels')->addFilter(
                new NandFilter([new EqualsFilter('typeId', Defaults::SALES_CHANNEL_TYPE_API)])
            );
        }

        /** @var CustomerGroupCollection $groups */
        $groups = $this->customerGroupRepository->search($criteria, $context)->getEntities();
        $buildUrls = [];

        foreach ($groups as $group) {
            if ($group->getRegistrationSalesChannels() === null) {
                continue;
            }

            foreach ($group->getRegistrationSalesChannels() as $registrationSalesChannel) {
                if ($registrationSalesChannel->getLanguages() === null) {
                    continue;
                }

                if ($registrationSalesChannel->getTypeId() === Defaults::SALES_CHANNEL_TYPE_API) {
                    if (Feature::isActive('v6.6.0.0')) {
                        continue;
                    }