code: def _dest_path(prefix, lang, destdir):
      return os.path.join(destdir, _file_name(prefix, lang))
  
imports: import logging
  import os
  import shutil
  import sys
  import typing
  from argparse import Namespace
  from itertools import zip_longest
  from fairseq import options, tasks, utils
  from fairseq.binarizer import AlignmentDatasetBinarizer, FileBinarizer, VocabularyDatasetBinarizer
  from fairseq.data import Dictionary
label_desc: Use image node_id 3 for calling a global function with example usage: _dest_path(prefix, lang, destdir) and returns: os