code: def test_model_can_train_save_and_load(self):
      self.ensure_model_can_train_save_and_load(self.param_file)
  
imports: from __future__ import division
  from __future__ import absolute_import
  from allennlp.common.testing import ModelTestCase
label_desc: Use image node_id 2 for calling the NlvrDirectSemanticParserTest obj's underlying member method code with example usage: obj.test_model_can_train_save_and_load() without return types