code: def testInvalidMap(self):
      message = json_format_proto3_pb2.TestMap()
      text = '{"int32Map": {"null": 2, "2": 3}}'
      self.assertRaisesRegexp(
          json_format.ParseError,
          "Failed to parse int32Map field: invalid literal",
          json_format.Parse,
          text,
          message,
      )
      text = '{"int32Map": {1: 2, "2": 3}}'
      self.assertRaisesRegexp(
          json_format.ParseError,
          (
              r"Failed to load JSON: Expecting property name"
              r"( enclosed in double quotes)?: line 1"
          ),
          json_format.Parse,
          text,
          message,
      )
      text = '{"boolMap": {"null": 1}}'
      self.assertRaisesRegexp(
          json_format.ParseError,
          'Failed to parse boolMap field: Expected "true" or "false", not null.',
          json_format.Parse,
          text,
          message,
      )
      if sys.version_info < (2, 7):
          return
      text = r'{"stringMap": {"a": 3, "\u0061": 2}}'
      self.assertRaisesRegexp(
          json_format.ParseError,
          "Failed to load JSON: duplicate key a",
          json_format.Parse,
          text,
          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 30 for calling the JsonFormatTest obj's underlying member method code with example usage: obj.testInvalidMap() without return types