code: def test_verify_module_duplicate_children():
      conv = nn.Conv2d(3, 3, 1)
      model = nn.Sequential(conv, conv)
  
      with pytest.raises(
          ValueError,
          match="module with duplicate children is not supported",
      ):
          Pipe(model, [1, 1])
  
imports: from collections import OrderedDict
  from copy import deepcopy
  import time
  import pytest
  import torch
  from torch import nn
  from fairscale.nn.pipe import Pipe
label_desc: Use image node_id 32 for calling a global function with example usage: test_verify_module_duplicate_children() without return types