code: def utterances_from_dir(eaf_dir: Path,
                          tier_prefixes: Tuple[str, ...]) -> List[Utterance]:
      
  
      logger.info(
          "EAF from directory: {}, searching with tier_prefixes {}".format(
              eaf_dir, tier_prefixes))
  
      utterances = []
      for eaf_path in eaf_dir.glob("**/*.eaf"):
          eaf_utterances = utterances_from_eaf(eaf_path, tier_prefixes)
          utterances.extend(eaf_utterances)
      return utterances
docs: Returns the utterances found in ELAN files in a directory.
  
      Recursively explores the directory, gathering ELAN files and extracting
      utterances from them for tiers that start with the specified prefixes.
  
      Args:
          eaf_dir: A path to the directory to be searched
          tier_prefixes: Stings matching the start of ELAN tier names that are to
              be extracted. For example, if you want to extract from tiers "xv-Jane"
              and "xv-Mark", then tier_prefixes = ["xv"] would do the job.
  
      Returns:
          A list of Utterance objects.