code: def test_input_and_output_elmo_bcn_can_train_save_and_load(self):
      # pylint: disable=line-too-long
      self.ensure_model_can_train_save_and_load(
          self.FIXTURES_ROOT
          / "biattentive_classification_network"
          / "elmo_experiment.json"
      )
  
imports: from __future__ import with_statement
  from __future__ import division
  from __future__ import absolute_import
  from copy import deepcopy
  import pytest
  from allennlp.common.testing import ModelTestCase
  from allennlp.common.checks import ConfigurationError
  from allennlp.common.params import Params
  from allennlp.models import Model
label_desc: Use image node_id 4 for calling the BiattentiveClassificationNetworkTest obj's underlying member method code with example usage: obj.test_input_and_output_elmo_bcn_can_train_save_and_load() without return types