code: def test_kwargs_are_passed_to_superclass(self):
      params = Params(
          {"type": "text_classification_json", "max_instances": 50}
      )
      reader = DatasetReader.from_params(params)
      assert reader.max_instances == 50
  
imports: from typing import Dict, Iterable, List, Mapping, Optional, Set, Tuple, Union
  import pytest
  import torch
  from allennlp.common import Lazy, Params, Registrable
  from allennlp.common.from_params import FromParams, takes_arg, remove_optional, create_kwargs
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data import DataLoader, DatasetReader, Tokenizer
  from allennlp.models import Model
  from allennlp.models.archival import load_archive
  from allennlp.common.checks import ConfigurationError
label_desc: Use image node_id 21 for calling the TestFromParams obj's underlying member method code with example usage: obj.test_kwargs_are_passed_to_superclass() without return types