code: def verify_module(
      module: Union[nn.Sequential, List[LazyModule]]
  ) -> None:
      if len(set(map(id, module))) != len(module):
          raise ValueError(
              "module with duplicate children is not supported"
          )
  
imports: from collections import OrderedDict
  from dataclasses import dataclass, field
  import itertools
  import threading
  from typing import TYPE_CHECKING, Any, Dict, Iterable, List, Optional, Tuple, Union
  import warnings
  import torch
  from torch import Tensor, nn
  from fairscale.nn.model_parallel import get_pipeline_parallel_group
  from .None import microbatch
  from .async_pipeline import AsyncPipeline
  from .async_schedule import Invocation, Location, ModuleWrapper
  from .batchnorm import DeferredBatchNorm
  from .skip.layout import SkipLayout
  from .skip.skippable import Skippable
  from .types import LazyModule
label_desc: Use image node_id 1 for calling a global function with example usage: verify_module(module) without return types