code: def test_creation_saving_restoring(self):
      model = MTEncDecModel(cfg=get_cfg())
      assert isinstance(model, MTEncDecModel)
      # Create a new temporary directory
      with tempfile.TemporaryDirectory() as restore_folder:
          with tempfile.TemporaryDirectory() as save_folder:
              save_folder_path = save_folder
              # Where model will be saved
              model_save_path = os.path.join(
                  save_folder, f"{model.__class__.__name__}.nemo"
              )
              model.save_to(save_path=model_save_path)
              # Where model will be restored from
              model_restore_path = os.path.join(
                  restore_folder, f"{model.__class__.__name__}.nemo"
              )
              shutil.copy(model_save_path, model_restore_path)
          # at this point save_folder should not exist
          assert save_folder_path is not None and not os.path.exists(
              save_folder_path
          )
          assert not os.path.exists(model_save_path)
          assert os.path.exists(model_restore_path)
          # attempt to restore
          model_copy = model.__class__.restore_from(
              restore_path=model_restore_path
          )
          assert model.num_weights == model_copy.num_weights
  
file_path: NeMo/tests/collections/nlp/test_nmt_model.py
imports: import os
  import shutil
  import tempfile
  import pytest
  import torch
  from omegaconf import DictConfig, OmegaConf
  from nemo.collections.nlp.models import MTEncDecModel
  from nemo.collections.nlp.models.machine_translation.mt_enc_dec_config import AAYNBaseConfig
label_desc: Use image node_id 1 for calling the TestMTEncDecModel obj's underlying member method code with example usage: obj.test_creation_saving_restoring() without return types