code: def test_local_hook_unnamed(self):
      self._check_local_hook(None, "MyLinkHook")
  
imports: import time
  import unittest
  import numpy
  import chainer
  from chainer import testing
label_desc: Use image node_id 6 for calling the TestLinkHook obj's underlying member method code with example usage: obj.test_local_hook_unnamed() without return types