code: def test_slowmo_single_node_multigpu(self):
      self._test_multigpu(
          "test_slowmo_single_node",
          ["--ddp-backend", "slowmo", "--nprocs-per-node", "2"],
      )
  
imports: import contextlib
  import json
  import logging
  import os
  import tempfile
  import unittest
  from io import StringIO
  import torch
  from fairseq import options
  from fairseq_cli import train
  from tests.utils import create_dummy_data, generate_main, preprocess_lm_data, preprocess_translation_data, train_language_model, train_translation_model
label_desc: Use image node_id 5 for calling the TestTranslationGPU obj's underlying member method code with example usage: obj.test_slowmo_single_node_multigpu() without return types