code: def testWrapperMessage(self):
      message = json_format_proto3_pb2.TestWrapper()
      message.bool_value.value = False
      message.int32_value.value = 0
      message.string_value.value = ""
      message.bytes_value.value = b""
      message.repeated_bool_value.add().value = True
      message.repeated_bool_value.add().value = False
      message.repeated_int32_value.add()
      self.assertEqual(
          json.loads(json_format.MessageToJson(message, True)),
          json.loads(
              "{\n"
              '  "int32Value": 0,'
              '  "boolValue": false,'
              '  "stringValue": "",'
              '  "bytesValue": "",'
              '  "repeatedBoolValue": [true, false],'
              '  "repeatedInt32Value": [0],'
              '  "repeatedUint32Value": [],'
              '  "repeatedFloatValue": [],'
              '  "repeatedDoubleValue": [],'
              '  "repeatedBytesValue": [],'
              '  "repeatedInt64Value": [],'
              '  "repeatedUint64Value": [],'
              '  "repeatedStringValue": []'
              "}"
          ),
      )
      parsed_message = json_format_proto3_pb2.TestWrapper()
      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 13 for calling the JsonFormatTest obj's underlying member method code with example usage: obj.testWrapperMessage() without return types