code: def default_binary_path(
      save_dir: str, lang_pair: str, lang: str, split: str
  ) -> str:
      return os.path.join(
          save_dir, f"{split}-binary-{lang_pair}.{lang}"
      )
  
file_path: translate/pytorch_translate/multilingual_utils.py
imports: import argparse
  import os
  from collections import defaultdict
  from typing import Dict, List, Optional, Tuple
  from pytorch_translate.data import dictionary
label_desc: Use image node_id 3 for calling a global function with example usage: default_binary_path(save_dir, lang_pair, lang, split) and returns: os