code: def test_regression_error_cuda(self):
      if not torch.cuda.is_available():
          return
      with least_used_cuda_device():
          return self.test_regression_error(cuda=True)
  
imports: import math
  import unittest
  import warnings
  from pathlib import Path
  from unittest.mock import MagicMock, patch
  import linear_operator
  import torch
  from torch import optim
  import gpytorch
  from gpytorch.likelihoods import GaussianLikelihood
  from gpytorch.models import ApproximateGP
  from gpytorch.test.base_test_case import BaseTestCase
  from gpytorch.test.utils import least_used_cuda_device
  from gpytorch.utils.warnings import OldVersionWarning
label_desc: Use image node_id 6 for calling the TestSVGPRegression obj's underlying member method code with example usage: obj.test_regression_error_cuda() and returns: self