code: def setUp(self):
      super().setUp()
      self._spawn_processes()
  
imports: import os
  import sys
  import tempfile
  import torch
  import torch.distributed
  import torch.multiprocessing
  from torch.testing._internal.common_distributed import MultiProcessTestCase
  from torch.testing._internal.common_utils import load_tests, NO_MULTIPROCESSING_SPAWN
label_desc: Use image node_id 1 for calling the TestDistributedNNFunctions obj's underlying member method code with example usage: obj.setUp() without return types