code: def test_assign__string(self, run):
      with assert_no_warnings():
          run["string"] = String(value="hello")
          run["string"] = String(value=stringify_unsupported("world"))
          run["string"] = stringify_unsupported(Obj())
          run["string"] = "End"
  
      assert run["string"].fetch() == "End"
  
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 11 for calling the TestStringifyUnsupported obj's underlying member method code with example usage: obj.test_assign__string(run) without return types