class_docstr: A memory-efficient constant sequence.
code: def __getitem__(self, index: slice) -> "ConstantSequence[DataT]":
      ...
  
imports: import bisect
  import sys
  import numpy
  from avalanche.benchmarks.utils.dataset_utils import slice_alike_object_to_indices
  from typing import Iterable, List, Optional, Sequence, Tuple, TypeVar, Union, overload
  from torch.utils.data import ConcatDataset
  import itertools
  from avalanche.benchmarks.utils.dataset_definitions import IDataset
label_desc: Use image node_id 4 for calling the ConstantSequence obj's underlying member method code with example usage: obj.__getitem__(index) without return types