code: def test_deletion_gpu(self):
      self.link.to_gpu()
      self.check_deletion()
  
imports: import numpy
  import unittest
  import chainer
  from chainer.backends.cuda import to_cpu
  from chainer.function import Function
  from chainer import testing
  from chainer.testing import attr
  from chainercv.links import PickableSequentialChain
  from chainercv.utils.testing import ConstantStubLink
label_desc: Use image node_id 11 for calling the PickableSequentialChainTestBase obj's underlying member method code with example usage: obj.test_deletion_gpu() without return types