code: def shortDescription(self):
      return None
  
imports: from __future__ import absolute_import, print_function, division
  import numpy
  import unittest
  import theano
  from theano import tensor
  from theano.compile import DeepCopyOp
  from theano.tensor.tests import test_subtensor, test_basic
  from theano.tests import unittest_tools
  from ..basic_ops import HostFromGpu, GpuFromHost, GpuContiguous
  from ..elemwise import GpuDimShuffle
  from ..subtensor import GpuIncSubtensor, GpuSubtensor, GpuAdvancedSubtensor1, GpuAdvancedSubtensor, GpuAdvancedBooleanSubtensor, GpuAdvancedIncSubtensor, GpuAdvancedIncSubtensor1, GpuAdvancedIncSubtensor1_dev20, GpuExtractDiag, GpuAllocDiag
  from ..type import gpuarray_shared_constructor
  from .config import mode_with_gpu, test_ctx_name
label_desc: Use image node_id 1 for calling the G_subtensor obj's underlying member method code with example usage: obj.shortDescription() and returns: None