code: def _update_record_with_id(self, identifier, rtype, content):
          
          record = self._create_request_record(identifier, rtype, None, content,
                                               self._get_lexicon_option('ttl'),
                                               self._get_lexicon_option('priority'))
  
          self._request_modify_dns_record(record)
docs: Updates existing record with no sub-domain name changes