code: public final B serverAddresses(Iterable<InetSocketAddress> serverAddresses) {
          requireNonNull(serverAddresses, "serverAddresses");
          final DnsServerAddresses addrs = DnsServerAddresses.sequential(serverAddresses);
          serverAddressStreamProvider = hostname -> addrs.stream();
          return self();
      }
docs: Sets the DNS server addresses to send queries to. Operating system default is used by default.