code: def testRoundTrip(self):
      new_message = missing_enum_values_pb2.TestEnumValues()
      new_message.ParseFromString(
          self.missing_message.SerializeToString()
      )
      self.assertEqual(self.message, new_message)
  
imports: from google.protobuf import unittest_mset_pb2
  from google.protobuf import unittest_pb2
  from google.protobuf import unittest_proto3_arena_pb2
  from google.protobuf.internal import api_implementation
  from google.protobuf.internal import encoder
  from google.protobuf.internal import message_set_extensions_pb2
  from google.protobuf.internal import missing_enum_values_pb2
  from google.protobuf.internal import test_util
  from google.protobuf.internal import testing_refleaks
  from google.protobuf.internal import type_checkers
label_desc: Use image node_id 7 for calling the UnknownEnumValuesTest obj's underlying member method code with example usage: obj.testRoundTrip() without return types