code: def test_append__custom_object(self, run):
      with assert_unsupported_warning():
          run["unsupported"].append(Obj())
          run["unsupported"].append(Obj())
  
      with assert_no_warnings():
          run["stringified"].append(stringify_unsupported(Obj()))
          run["stringified"].append(stringify_unsupported(Obj()))
  
      with assert_no_warnings():
          run["regular"].append(str(Obj()))
          run["regular"].append(str(Obj()))
  
      assert (
          run["regular"]
          .fetch_values()
          .equals(run["stringified"].fetch_values())
      )
  
imports: import math
  from contextlib import contextmanager
  from datetime import datetime
  from typing import Any, Dict, Iterator, MutableMapping
  from pytest import fixture, raises, warns
  from neptune import init_run
  from neptune.common.warnings import NeptuneUnsupportedType, warned_once
  from neptune.constants import MAX_32_BIT_INT, MIN_32_BIT_INT
  from neptune.types import Artifact, Boolean, Datetime, Float, FloatSeries, Integer, String, StringSeries
  from neptune.utils import stringify_unsupported
label_desc: Use image node_id 34 for calling the TestStringifyUnsupported obj's underlying member method code with example usage: obj.test_append__custom_object(run) without return types