code: def tearDown(self):
      chainer.set_debug(self.debug)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import force_array
label_desc: Use image node_id 2 for calling the TestPermutateInvalidIndices obj's underlying member method code with example usage: obj.tearDown() without return types