code: def get_nics():
          
          LOGGER.debug("NICService.get_nics")
          args = {'http_operation': 'GET', 'operation_path': ''}
          response = NICService.requester.call(args)
          ret = None
          if response.rc == 0:
              ret = []
              for nic in response.response_content['nics']:
                  ret.append(NIC.json_2_nic(nic))
          elif response.rc != 404:
              err_msg = 'NICService.get_nics - Problem while getting NIC. ' \
                        'Reason: ' + str(response.response_content) + '-' + str(response.error_message) + \
                        " (" + str(response.rc) + ")"
              LOGGER.warning(err_msg)
          return ret
docs: :return: all knows NIC