code: def assert_instances_are_correct(self, candidate_instances):
      # First we need to remove padding tokens from the candidates.
      # pylint: disable=protected-access
      candidate_instances = [
          tuple(w for w in instance if w != 0)
          for instance in candidate_instances
      ]
      expected_instances = [
          tuple(instance.fields["text"]._indexed_tokens["tokens"])
          for instance in self.instances
      ]
      assert set(candidate_instances) == set(expected_instances)
  
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 3 for calling the IteratorTest obj's underlying member method code with example usage: obj.assert_instances_are_correct(candidate_instances) without return types