code: def test_gradient_nonkeops(self):
      self.test_gradient(use_keops=False)
  
imports: from abc import abstractmethod
  from unittest.mock import patch
  import torch
  import gpytorch
  from .base_test_case import BaseTestCase
label_desc: Use image node_id 15 for calling the BaseKeOpsTestCase obj's underlying member method code with example usage: obj.test_gradient_nonkeops() without return types