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