code: def tearDown(self):
      self._config_user.__exit__(None, None, None)
  
imports: import copy
  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
label_desc: Use image node_id 2 for calling the TestBinaryHierarchicalSoftmax obj's underlying member method code with example usage: obj.tearDown() without return types