code: def dataset_dest_file(args, output_prefix, lang, extension):
      return "{}.{}".format(
          dataset_dest_prefix(args, output_prefix, lang), extension
      )
  
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 6 for calling a global function with example usage: dataset_dest_file(args, output_prefix, lang, extension) and returns: str