code: public static ResourceRecordSet<NSData> ns(String name, Collection<String> nsdnames) {
      return new NSBuilder().name(name).addAll(nsdnames).build();
    }
docs: creates ns set of {@link denominator.model.rdata.NSData NS} records for the specified name.
  
  @param name     ex. {@code denominator.io.}
  @param nsdnames nsdname values ex. {@code [ns1.denominator.io., ns2.denominator.io.]}