code: def test_zero_det_gpu(self):
      with chainer.using_config("debug", True):
          self.check_zero_det(
              cuda.to_gpu(self.x), cuda.to_gpu(self.gy), ValueError
          )
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import type_check
label_desc: Use image node_id 26 for calling the DetFunctionTest obj's underlying member method code with example usage: obj.test_zero_det_gpu() without return types