code: def test_gpu_export_ts(self):
      model = MTEncDecModel(cfg=get_cfg()).cuda()
      assert isinstance(model, MTEncDecModel)
      export_test(model, ".ts")
  
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 4 for calling the TestMTEncDecModel obj's underlying member method code with example usage: obj.test_gpu_export_ts() without return types