code: def test_one_hidden(self, module_cls):
      module = module_cls()
      parameters = list(module.named_parameters())
  
      # 2 linear * (weight + bias)
      assert len(parameters) == 4
  
      # 2 linear, 1 relu, 1 dropout
      assert len(module.sequential) == 4
      assert isinstance(module.sequential[0], nn.Linear)
      assert isinstance(module.sequential[1], nn.ReLU)
      assert isinstance(module.sequential[2], nn.Dropout)
      assert isinstance(module.sequential[3], nn.Linear)
  
file_path: skorch/skorch/tests/test_toy.py
imports: import numpy
  import pytest
  import torch
  from torch import nn
label_desc: Use image node_id 2 for calling the TestMLPModule obj's underlying member method code with example usage: obj.test_one_hidden(module_cls) without return types