docs: private void assignMinimumTTL(List<? extends DnsAnswer> dnsAnswers, LookupResult.Builder builder) {
  
          if (config.hasOverrideTTL()) {
              builder.cacheTTL(config.getCacheTTLOverrideMillis());
          } else {
              // Deduce minimum TTL on all TXT records. A TTL will always be returned by DNS server.
              builder.cacheTTL(dnsAnswers.stream()
                                         .map(DnsAnswer::dnsTTL)
                                         .min(Comparator.comparing(Long::valueOf)).get() * 1000);
          }
      }