code: def get_untranscribed_prefixes_from_file(target_directory: Path) -> List[str]:
      
  
      untranscribed_prefix_fn = target_directory / "untranscribed_prefixes.txt"
      if untranscribed_prefix_fn.exists():
          with untranscribed_prefix_fn.open() as f:
              prefixes = f.readlines()
  
          return [prefix.strip() for prefix in prefixes]
      else:
          #logger.warning("Attempting to get untranscribed prefixes but the file ({})"
          #                " that should specify these does not exist".format(untranscribed_prefix_fn))
          pass
      return []
docs: The file "untranscribed_prefixes.txt" will specify prefixes which
      do not have an associated transcription file if placed in the target directory.
  
      This will fetch those prefixes from that file and will return an empty
      list if that file does not exist.
  
      See find_untranscribed_wavs function for finding untranscribed prefixes in an
      experiment directory.
  
      Returns:
          A list of all untranscribed prefixes as specified in the file