code: def test_find_optimizers_for_FSDP_module(self) -> None:
      spawn_multi_process(
          2, "nccl", self._find_optimizers_for_FSDP_module
      )
  
file_path: tnt/tests/framework/test_unit_utils.py
imports: import unittest
  from typing import Dict, Iterator
  import torch
  from torch.distributed.fsdp import FullyShardedDataParallel
  from torch.optim import Optimizer
  from torchtnt.framework._unit_utils import _find_optimizers_for_module, _step_requires_iterator
  from torchtnt.framework.state import State
  from torchtnt.utils.env import init_from_env
  from torchtnt.utils.test_utils import spawn_multi_process
label_desc: Use image node_id 3 for calling the UnitUtilsTest obj's underlying member method code with example usage: obj.test_find_optimizers_for_FSDP_module() without return types