code: def test_calls_gpu(self):
      device = torch.device("cuda")
      self.linear.to(device)
      self._test_calls(device)
  
file_path: pfrl/tests/nn_tests/test_noisy_linear.py
imports: import numpy
  import pytest
  import torch
  from pfrl.nn import noisy_linear
label_desc: Use image node_id 4 for calling the TestFactorizedNoisyLinear obj's underlying member method code with example usage: obj.test_calls_gpu() without return types