code: def _get_extra_full_path(self, extra_path: str) -> str:
      return os.path.join(self._extra_root, extra_path)
  
imports: import csv
  from enum import Enum
  import logging
  import os
  from typing import Callable, List, Optional, Tuple, Union
  import numpy
  from .extended import ExtendedVisionDataset
label_desc: Use image node_id 3 for calling the ImageNet obj's underlying member method code with example usage: obj._get_extra_full_path(extra_path) and returns: os