code: def load(
      cls,
      cache_dir: str,
      serializers: Dict[str, Serializer],
      remote_dir: Optional[str] = None,
      item_loader: Optional[BaseItemLoader] = None,
  ) -> Optional["ChunksConfig"]:
      cache_index_filepath = os.path.join(cache_dir, _INDEX_FILENAME)
  
      if isinstance(remote_dir, str):
          downloader = get_downloader_cls(remote_dir, cache_dir, [])
          downloader.download_file(
              os.path.join(remote_dir, _INDEX_FILENAME),
              cache_index_filepath,
          )
  
      if not os.path.exists(cache_index_filepath):
          return None
  
      return ChunksConfig(
          cache_dir, serializers, remote_dir, item_loader
      )
  
imports: import json
  import os
  from typing import Any, Dict, List, Optional, Tuple
  from lightning.data.streaming.constants import _INDEX_FILENAME, _TORCH_GREATER_EQUAL_2_1_0
  from lightning.data.streaming.downloader import get_downloader_cls
  from lightning.data.streaming.item_loader import BaseItemLoader, PyTreeLoader, TokensLoader
  from lightning.data.streaming.sampler import ChunkedIndex
  from lightning.data.streaming.serializers import Serializer
label_desc: Use image node_id 13 for calling the ChunksConfig obj's underlying member method code with example usage: obj.load(cls, cache_dir, serializers, remote_dir, item_loader) and returns: ChunksConfig, None