code: def test_call_gpu(self):
      self.link.to_gpu()
      self.check_call()
  
file_path: chainercv/tests/links_tests/model_tests/deeplab_tests/test_aspp.py
imports: import unittest
  import chainer
  from chainer import testing
  from chainer.testing import attr
  from chainercv.links.model.deeplab import SeparableASPP
label_desc: Use image node_id 4 for calling the TestSeparableASPP obj's underlying member method code with example usage: obj.test_call_gpu() without return types