code: def setUp(self):
      self.descriptor = (
          missing_enum_values_pb2.TestEnumValues.DESCRIPTOR
      )
  
      self.message = missing_enum_values_pb2.TestEnumValues()
      # TestEnumValues.ZERO = 0, but does not exist in the other NestedEnum.
      self.message.optional_nested_enum = (
          missing_enum_values_pb2.TestEnumValues.ZERO
      )
      self.message.repeated_nested_enum.extend(
          [
              missing_enum_values_pb2.TestEnumValues.ZERO,
              missing_enum_values_pb2.TestEnumValues.ONE,
          ]
      )
      self.message.packed_nested_enum.extend(
          [
              missing_enum_values_pb2.TestEnumValues.ZERO,
              missing_enum_values_pb2.TestEnumValues.ONE,
          ]
      )
      self.message_data = self.message.SerializeToString()
      self.missing_message = (
          missing_enum_values_pb2.TestMissingEnumValues()
      )
      self.missing_message.ParseFromString(self.message_data)
  
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 1 for calling the UnknownEnumValuesTest obj's underlying member method code with example usage: obj.setUp() without return types