class_docstr: Dummy beam dataset.
class_docstr_tok: ["Dummy","beam","dataset","."]
code: def _split_generators(self, dl_manager, pipeline):
      return [
          datasets.SplitGenerator(
              name=datasets.Split.TRAIN,
              gen_kwargs={"examples": get_test_nested_examples()},
          )
      ]
  
imports: import os
  import tempfile
  from functools import partial
  from unittest import TestCase
  from unittest.mock import patch
  import datasets
  import datasets.config
  from .utils import require_beam
label_desc: Use image node_id 2 for calling the NestedBeamDataset obj's underlying member method code with example usage: obj._split_generators(dl_manager, pipeline) and returns: list