code: def _file_storage_gather(
      storage: SingleProcessFileTensorStorage,
      dst_rank: int = 0,
      mode: str = "rb",
  ) -> Optional[MultiProcessFileTensorStorage]:
      storage.storage_impl.close()
      fpath_list = gather(storage.fpath, dst=dst_rank)
      if get_rank() != dst_rank:
          return None
      rank_to_fpath = {i: fpath_list[i] for i in range(len(fpath_list))}
      return MultiProcessFileTensorStorage(
          storage.data_schema, rank_to_fpath, mode
      )
  
imports: import io
  import numpy
  import os
  from dataclasses import dataclass
  from functools import reduce
  from operator import mul
  from typing import BinaryIO, Dict, Optional, Tuple
  import torch
  from detectron2.utils.comm import gather, get_rank
  from detectron2.utils.file_io import PathManager
label_desc: Use image node_id 5 for calling a global function with example usage: _file_storage_gather(storage, dst_rank, mode) and returns: MultiProcessFileTensorStorage, None