code: def tearDown(self):
      self._config_user.__exit__(None, None, None)
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestHinge obj's underlying member method code with example usage: obj.tearDown() without return types