code: def __init__(self, *data):
      self.data = data
  
file_path: river/river/checks/__init__.py
imports: from __future__ import annotations
  import functools
  import typing
  import numpy
  from river.base import Estimator
  from river.model_selection.base import ModelSelector
  from river.reco.base import Ranker
  from .None import anomaly, clf, common, model_selection, reco
label_desc: Use image node_id 1 to create a new _DummyDataset object  with example: obj = _DummyDataset()