code: def test_forward_cuda(self):
      self._test_forward(torch.device("cuda"))
  
imports: import unittest
  import torch
  import torchvision
  from lightly import _torchvision_vit_available
  from lightly.models import utils
label_desc: Use image node_id 4 for calling the TestMAEDecoder obj's underlying member method code with example usage: obj.test_forward_cuda() without return types