code: def test_native_distrib_single_node_spawn_nccl(init_method, dirname):
      if init_method == "FILE":
          init_method = f"file://{dirname}/shared"
  
      device = torch.device("cuda")
      _test_native_distrib_single_node_spawn(
          init_method, "nccl", device
      )
  
imports: import os
  import pytest
  import torch
  import torch.distributed
  from packaging.version import Version
  import ignite.distributed
  from ignite.distributed.utils import has_native_dist_support
  from tests.ignite.distributed.utils import _test_distrib__get_max_length, _test_distrib_all_gather, _test_distrib_all_gather_group, _test_distrib_all_reduce, _test_distrib_all_reduce_group, _test_distrib_barrier, _test_distrib_broadcast, _test_distrib_config, _test_distrib_new_group, _test_distrib_one_rank_only, _test_distrib_one_rank_only_with_engine, _test_sync
label_desc: Use image node_id 6 for calling a global function with example usage: test_native_distrib_single_node_spawn_nccl(init_method, dirname) without return types