code: def get_cub_path():
      # Returns the CUB header path or None if not found.
      global _cub_path
      if _cub_path == "":
          _cub_path = _get_cub_path()
      return _cub_path
  
imports: import ctypes
  import importlib.metadata
  import json
  import os
  import os.path
  import re
  import shutil
  import sys
  from typing import Any, Dict, List, Optional, Tuple
  import warnings
label_desc: Use image node_id 6 for calling a global function with example usage: get_cub_path() and returns: _cub_path