code: def setUp(self):
      self.descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
      self.all_fields = unittest_pb2.TestAllTypes()
      test_util.SetAllFields(self.all_fields)
      self.all_fields_data = self.all_fields.SerializeToString()
      self.empty_message = unittest_pb2.TestEmptyMessage()
      self.empty_message.ParseFromString(self.all_fields_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 UnknownFieldsAccessorsTest obj's underlying member method code with example usage: obj.setUp() without return types