code: def skip(save_json):
      """
      Detects if the data preparation has been already done.
      If the preparation has been done, we can skip it.
      Returns
      -------
      bool
          if True, the preparation phase can be skipped.
          if False, it must be done.
      """
      if not os.path.isfile(save_json):
          return False
      return True
  
file_path: speechbrain/recipes/ZaionEmotionDataset/emotion_diarization/datasets/prepare_JLCORPUS.py
imports: import numpy
  import os
  import random
  from pydub import AudioSegment
  import json
  from datasets.vad import vad_for_folder
  from pathlib import Path
  import shutil
  import logging
label_desc: Use image node_id 5 for calling a global function with example usage: skip(save_json) and returns: True, False