code: def test_lambda():
      model = nn.Sequential(
          nn.ReLU(),
          Lambda(lambda x: x + 1),
          nn.ReLU(),
      )
      x = torch.rand(3, 2)
      # Since x is all positive, ReLU will not have any effects
      y = model(x)
      torch_assert_allclose(y, x + 1)
  
imports: import torch
  from torch import nn
  from pfrl.nn.lmbda import Lambda
  from pfrl.testing import torch_assert_allclose
label_desc: Use image node_id 1 for calling a global function with example usage: test_lambda() without return types