code: def test_mst_decoding_can_run_forward(self):
      self.model.use_mst_decoding_for_validation = True
      self.ensure_model_can_train_save_and_load(self.param_file)
  
file_path: magnitude/pymagnitude/third_party/allennlp/tests/models/biaffine_dependency_parser_test.py
imports: from __future__ import division
  from __future__ import absolute_import
  import torch
  from allennlp.common.testing.model_test_case import ModelTestCase
  from allennlp.nn.decoding.chu_liu_edmonds import decode_mst
label_desc: Use image node_id 3 for calling the BiaffineDependencyParserTest obj's underlying member method code with example usage: obj.test_mst_decoding_can_run_forward() without return types