code: def main(self, offset, xs, out_xs):
      raise NotImplementedError()
  
imports: from six import moves
  from chainer.backends import cuda
  from chainer.utils import conv_nd_kernel
label_desc: Use image node_id 5 for calling the PoolingNDKernelBackward obj's underlying member method code with example usage: obj.main(offset, xs, out_xs) without return types