code: def __getitem__(self, index):
      raise NotImplementedError()
  
imports: from __future__ import annotations
  from collections import defaultdict
  from typing import Any, Callable, Dict, List, Type
  import torch
  from torch.utils.data import Dataset, IterableDataset
  from .utils import _default_get_rngs_state, _default_set_rngs_state, _default_manual_seed
label_desc: Use image node_id 3 for calling the _UidDataset obj's underlying member method code with example usage: obj.__getitem__(index) without return types