code: def testClear(self):
      self.empty_message.Clear()
      # All cleared, even unknown fields.
      self.assertEqual(self.empty_message.SerializeToString(), b"")
  
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 12 for calling the UnknownFieldsAccessorsTest obj's underlying member method code with example usage: obj.testClear() without return types