code: def testAlwaysSeriliaze(self):
      message = json_format_proto3_pb2.TestMessage(string_value="foo")
      self.assertEqual(
          json.loads(json_format.MessageToJson(message, True)),
          json.loads(
              "{"
              '"repeatedStringValue": [],'
              '"stringValue": "foo",'
              '"repeatedBoolValue": [],'
              '"repeatedUint32Value": [],'
              '"repeatedInt32Value": [],'
              '"enumValue": "FOO",'
              '"int32Value": 0,'
              '"floatValue": 0,'
              '"int64Value": "0",'
              '"uint32Value": 0,'
              '"repeatedBytesValue": [],'
              '"repeatedUint64Value": [],'
              '"repeatedDoubleValue": [],'
              '"bytesValue": "",'
              '"boolValue": false,'
              '"repeatedEnumValue": [],'
              '"uint64Value": "0",'
              '"doubleValue": 0,'
              '"repeatedFloatValue": [],'
              '"repeatedInt64Value": [],'
              '"repeatedMessageValue": []}'
          ),
      )
      parsed_message = json_format_proto3_pb2.TestMessage()
      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 5 for calling the JsonFormatTest obj's underlying member method code with example usage: obj.testAlwaysSeriliaze() without return types