code: def test_add_ws_hook(self):
      hook = WeightStandardization()
      layer = self.layer
      layer.add_hook(hook)
      if self.lazy_init:
          with chainer.using_config("train", False):
              layer(self.x)
  
imports: import unittest
  import numpy
  import pytest
  import chainer
  from chainer.backends import cuda
  from chainer.link_hooks.weight_standardization import WeightStandardization
  import chainer.links
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestEmbedID obj's underlying member method code with example usage: obj.test_add_ws_hook() without return types