code: def _get_submodules(self, fsdp_net):
      return [
          submodule
          for submodule in FSDP.fsdp_modules(fsdp_net)
          if not submodule.check_is_root()
      ]
  
imports: import sys
  from typing import Optional
  import torch
  import torch.nn
  import torch.nn.functional
  from torch import distributed
  from torch.distributed.algorithms._comm_hooks import default_hooks
  from torch.distributed.distributed_c10d import _get_default_group
  from torch.distributed.fsdp import FullyShardedDataParallel, MixedPrecision
  from torch.distributed.fsdp.fully_sharded_data_parallel import ShardingStrategy
  from torch.distributed.fsdp.wrap import ModuleWrapPolicy
  from torch.testing._internal.common_distributed import requires_nccl, requires_nccl_version, skip_but_pass_in_sandcastle_if, skip_if_lt_x_gpu
  from torch.testing._internal.common_fsdp import FSDPTest
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests
label_desc: Use image node_id 2 for calling the TestCommunicationHooks obj's underlying member method code with example usage: obj._get_submodules(fsdp_net) and returns: unknown