code: def test_batch_with_some_empty_lists_works(self):
      instances = [self.empty_instance, self.non_empty_instance]
      model = DummyModel(self.vocab)
      model.eval()
      loader = SimpleDataLoader(instances, 2, vocab=self.vocab)
      batch = next(iter(loader))
      model.forward(**batch)
  
imports: from typing import Dict
  import numpy
  import torch
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.data import Token, Vocabulary, Instance
  from allennlp.data.fields import TextField, LabelField, ListField, IndexField, SequenceLabelField
  from allennlp.data.token_indexers import SingleIdTokenIndexer, TokenCharactersIndexer
  from allennlp.data.data_loaders import SimpleDataLoader
  from allennlp.data.tokenizers import SpacyTokenizer
  from allennlp.models import Model
  from allennlp.modules import Embedding
  from allennlp.modules.text_field_embedders import BasicTextFieldEmbedder
label_desc: Use image node_id 15 for calling the TestListField obj's underlying member method code with example usage: obj.test_batch_with_some_empty_lists_works() without return types