code: def json_2_subnet(json_obj):
          
          LOGGER.debug("Subnet.json_2_subnet")
          return Subnet(subnetid=json_obj['subnetID'],
                        name=json_obj['subnetName'],
                        description=json_obj['subnetDescription'],
                        ip=json_obj['subnetIP'],
                        mask=json_obj['subnetMask'],
                        routing_area_id=json_obj['subnetRoutingAreaID'],
                        ip_address_ids=json_obj['subnetIPAddressesID'],
                        subnet_loc_ids=json_obj['subnetLocationsID'],
                        subnet_osi_ids=json_obj['subnetOSInstancesID'])
docs: transform JSON obj coming from Ariane to ariane_clip3 object
          :param json_obj: the JSON obj coming from Ariane
          :return: ariane_clip3 Subnet object