code: def get_targets(self) -> Optional[np.ndarray]:
      entries = self._get_entries()
      return (
          None if self.split == _Split.TEST else entries["class_index"]
      )
  
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 16 for calling the ImageNet obj's underlying member method code with example usage: obj.get_targets() and returns: unknown