code: def test_horseshoe_prior_to_gpu(self):
      if torch.cuda.is_available():
          prior = HorseshoePrior(0.1).cuda()
          self.assertEqual(prior.scale.device.type, "cuda")
  
file_path: gpytorch/test/priors/test_horseshoe_prior.py
imports: import unittest
  import torch
  from gpytorch.priors import HorseshoePrior
label_desc: Use image node_id 1 for calling the TestHorseshoePrior obj's underlying member method code with example usage: obj.test_horseshoe_prior_to_gpu() without return types