code: def create_response_adu(self, meta_data, response_pdu):
          
          response_mbap = pack_mbap(
              transaction_id=meta_data['transaction_id'],
              protocol_id=meta_data['protocol_id'],
              length=len(response_pdu) + 1,
              unit_id=meta_data['unit_id']
          )
  
          return response_mbap + response_pdu
docs: Build response ADU from meta data and response PDU and return it.
  
          :param meta_data: A dict with meta data.
          :param request_pdu: A bytearray containing request PDU.
          :return: A bytearray containing request ADU.