code: def test_list_field_can_handle_empty_text_fields(self):
      list_field = ListField(
          [self.field1, self.field2, self.empty_text_field]
      )
      list_field.index(self.vocab)
      tensor_dict = list_field.as_tensor(
          list_field.get_padding_lengths()
      )
      numpy.testing.assert_array_equal(
          tensor_dict["words"]["tokens"].detach().cpu().numpy(),
          numpy.array(
              [[2, 3, 4, 5, 0], [2, 3, 4, 1, 5], [0, 0, 0, 0, 0]]
          ),
      )
  
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 3 for calling the TestListField obj's underlying member method code with example usage: obj.test_list_field_can_handle_empty_text_fields() without return types