code: def check_backward_chainerx(self, x_data, t_data):
      # TODO(niboshi): gradient_check does not support integer input
      # (no_grads) for ChainerX. Support it and merge this method with
      # `self.check_backward`.
  
      def f(x):
          return functions.hinge(x, t_data, self.norm)
  
      gradient_check.check_backward(
          f, (x_data,), None, dtype="d", **self.backward_options
      )
  
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 9 for calling the TestHinge obj's underlying member method code with example usage: obj.check_backward_chainerx(x_data, t_data) and returns: functions