class_docstr: Base class for LIT datasets.
code: def __len__(self):
      return len(self.examples)
  
imports: from collections.abc import Callable, Mapping, Sequence
  import hashlib
  import glob
  import inspect
  import os
  import random
  import types
  from typing import Optional, Union, cast
  from absl import logging
  from lit_nlp.api import types
  from lit_nlp.lib import serialize
  from lit_nlp.lib import utils
label_desc: Use image node_id 8 for calling the Dataset obj's underlying member method code with example usage: obj.__len__() and returns: len