code: def test_from_params(self):
      # pylint: disable=protected-access
      params = Params({})
      iterator = BasicIterator.from_params(params)
      assert iterator._batch_size == 32  # default value
  
      params = Params({"batch_size": 10})
      iterator = BasicIterator.from_params(params)
      assert iterator._batch_size == 10
  
imports: from __future__ import absolute_import
  from collections import Counter
  from allennlp.common import Params
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data import Instance, Token, Vocabulary
  from allennlp.data.dataset_readers.dataset_reader import _LazyInstances
  from allennlp.data.fields import TextField
  from allennlp.data.iterators import BasicIterator
  from allennlp.data.token_indexers import SingleIdTokenIndexer
label_desc: Use image node_id 10 for calling the TestBasicIterator obj's underlying member method code with example usage: obj.test_from_params() without return types