code: def test_kernel_cuda(self):
      if torch.cuda.is_available():
          self.test_kernel(cuda=True)
  
file_path: gpytorch/test/kernels/test_rbf_kernel_grad.py
imports: import unittest
  import torch
  from gpytorch.kernels import RBFKernelGrad
  from gpytorch.test.base_kernel_test_case import BaseKernelTestCase
label_desc: Use image node_id 4 for calling the TestRBFKernelGrad obj's underlying member method code with example usage: obj.test_kernel_cuda() without return types