code: def create(cls, name, min_dst_port, max_dst_port=None, min_src_port=None,
                 max_src_port=None, protocol_agent=None, comment=None):
          
          max_dst_port = max_dst_port if max_dst_port is not None else ''
          json = {'name': name,
                  'min_dst_port': min_dst_port,
                  'max_dst_port': max_dst_port,
                  'min_src_port': min_src_port,
                  'max_src_port': max_src_port,
                  'protocol_agent_ref': element_resolver(protocol_agent) or None,
                  'comment': comment}
  
          return ElementCreator(cls, json)
docs: Create the TCP service
  
          :param str name: name of tcp service
          :param int min_dst_port: minimum destination port value
          :param int max_dst_port: maximum destination port value
          :param int min_src_port: minimum source port value
          :param int max_src_port: maximum source port value
          :param str,ProtocolAgent protocol_agent: optional protocol agent for
              this service
          :param str comment: optional comment for service
          :raises CreateElementFailed: failure creating element with reason
          :return: instance with meta
          :rtype: TCPService