code: def skip(splits, save_folder):
      """Detect when the AiSHELL-1 data preparation can be skipped.
  
      Arguments
      ---------
      splits : list
          A list of the splits expected in the preparation.
      save_folder : str
          The location of the save directory
  
      Returns
      -------
      bool
          if True, the preparation phase can be skipped.
          if False, it must be done.
      """
      # Checking csv files
      skip = True
  
      for split in splits:
          if not os.path.isfile(
              os.path.join(save_folder, split + ".csv")
          ):
              skip = False
  
      return skip
  
file_path: speechbrain/recipes/AISHELL-1/ASR/seq2seq/aishell_prepare.py
imports: import os
  import shutil
  import logging
  import glob
  import csv
  from speechbrain.dataio.dataio import read_audio_info
  from speechbrain.utils.parallel import parallel_map
  import functools
label_desc: Use image node_id 3 for calling a global function with example usage: skip(splits, save_folder) and returns: skip