code: def download_file(
      self, remote_chunkpath: str, local_chunkpath: str
  ) -> None:
      pass
  
file_path: pytorch-lightning/src/lightning/data/streaming/downloader.py
imports: import os
  import shutil
  from abc import ABC
  from typing import Any, Dict, List
  from urllib import parse
  from lightning.data.streaming.client import S3Client
label_desc: Use image node_id 3 for calling the Downloader obj's underlying member method code with example usage: obj.download_file(remote_chunkpath, local_chunkpath) without return types