code: def testStructMessage(self):
      message = json_format_proto3_pb2.TestStruct()
      message.value["name"] = "Jim"
      message.value["age"] = 10
      message.value["attend"] = True
      message.value["email"] = None
      message.value.get_or_create_struct("address")["city"] = "SFO"
      message.value["address"]["house_number"] = 1024
      struct_list = message.value.get_or_create_list("list")
      struct_list.extend([6, "seven", True, False, None])
      struct_list.add_struct()["subkey2"] = 9
      message.repeated_value.add()["age"] = 11
      message.repeated_value.add()
      self.assertEqual(
          json.loads(json_format.MessageToJson(message, False)),
          json.loads(
              "{"
              '  "value": {'
              '    "address": {'
              '      "city": "SFO", '
              '      "house_number": 1024'
              "    }, "
              '    "age": 10, '
              '    "name": "Jim", '
              '    "attend": true, '
              '    "email": null, '
              '    "list": [6, "seven", true, false, null, {"subkey2": 9}]'
              "  },"
              '  "repeatedValue": [{"age": 11}, {}]'
              "}"
          ),
      )
      parsed_message = json_format_proto3_pb2.TestStruct()
      self.CheckParseBack(message, parsed_message)
  
imports: import json
  import math
  import sys
  from google.protobuf import any_pb2
  from google.protobuf import duration_pb2
  from google.protobuf import field_mask_pb2
  from google.protobuf import struct_pb2
  from google.protobuf import timestamp_pb2
  from google.protobuf import wrappers_pb2
  from google.protobuf.internal import well_known_types
  from google.protobuf import json_format
  from google.protobuf.util import json_format_proto3_pb2
label_desc: Use image node_id 14 for calling the JsonFormatTest obj's underlying member method code with example usage: obj.testStructMessage() without return types