code: def __exit__(
      self,
      exc_type: type[BaseException],
      exc_val: BaseException,
      exc_tb: TracebackType,
  ) -> None:
      if self.tempfile:
          self.tempfile.close()
  
      if self.dask_client:
          self.dask_client.shutdown()  # type: ignore[no-untyped-call]
          self.dask_client.close()
  
file_path: optuna/optuna/testing/storages.py
imports: from __future__ import annotations
  import sys
  from types import TracebackType
  from typing import Any
  from typing import IO
  import fakeredis
  import pytest
  import optuna
  from optuna.storages import JournalFileStorage
  from optuna.testing.tempfile_pool import NamedTemporaryFilePool
label_desc: Use image node_id 3 for calling the StorageSupplier obj's underlying member method code with example usage: obj.__exit__(exc_type, exc_val, exc_tb) without return types