code: def save_checkpoint(self, checkpoint_folder: str | PathLike):
      root_path = Path(checkpoint_folder).absolute()
      root_path.mkdir(parents=True, exist_ok=True)
      shutil.copy2(
          self._cache_folder / "distil_storage.hdf5",
          root_path / "distil_storage.hdf5",
      )
  
imports: from __future__ import annotations
  import logging
  import os
  from os import PathLike
  from pathlib import Path
  import shutil
  import tempfile
  from typing import Any, Dict, List, Literal
  import json_tricks
  from .utils import pickle_dump, pickle_load
label_desc: Use image node_id 5 for calling the HDF5Storage obj's underlying member method code with example usage: obj.save_checkpoint(checkpoint_folder) without return types