code: def tearDown(self):
      self._maybe_destroy_dist()
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import json
  import logging
  import os
  import subprocess
  import tempfile
  import unittest
  from pathlib import Path
  import classy_vision.optim
  import torch
  import torch.distributed
  from classy_vision.optim.zero import ZeRO
  from test.generic.config_utils import get_distributed_launch_cmd, get_fast_test_task_config
  from test.generic.optim_test_util import TestOptimizer
label_desc: Use image node_id 3 for calling the TestOptimizerStateShardingIntegration obj's underlying member method code with example usage: obj.tearDown() without return types