code: def test_forward_gpu(self):
      self._test_forward(gpu=0)
  
file_path: pfrl/tests/nn_tests/test_recurrent_sequential.py
imports: import unittest
  import pytest
  import torch
  import torch.nn.functional
  from torch import nn
  from pfrl.nn import Lambda, RecurrentSequential
  from pfrl.testing import torch_assert_allclose
label_desc: Use image node_id 2 for calling the TestRecurrentSequential obj's underlying member method code with example usage: obj.test_forward_gpu() without return types