code: def test_initialize_gpu(self):
      with testing.assert_warns(DeprecationWarning):
          self.link.to_gpu()
      self.link(cuda.cupy.zeros(self.shape, dtype="f"))
      testing.assert_allclose(
          numpy.ones(self.size), self.link.gamma.data
      )
      testing.assert_allclose(
          numpy.zeros(self.size), self.link.beta.data
      )
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
  from chainer.utils import type_check
label_desc: Use image node_id 3 for calling the TestDefaultInitializer obj's underlying member method code with example usage: obj.test_initialize_gpu() without return types