handle_dtypes_attr.mutable_list()->add_type(dtype);

        SetTensorShapeProto(subtype,
                            handle_shapes_attr.mutable_list()->add_shape());
      }

      (*node_def->mutable_attr())["_handle_dtypes"] = handle_dtypes_attr;
      (*node_def->mutable_attr())["_handle_shapes"] = handle_shapes_attr;
    }
  }

  TF_RETURN_IF_ERROR(

    Arg<TF_NumberTensor, [{1-D.  The `values` of the first `SparseTensor`, size `[nnz]` Vector.}]>:$a_values,
    Arg<TF_Int64Tensor, [{1-D.  The `shape` of the first `SparseTensor`, size `[ndims]` Vector.}]>:$a_shape,
    Arg<TF_Int64Tensor, [{2-D.  The `indices` of the second `SparseTensor`, size `[nnz, ndims]` Matrix.}]>:$b_indices,
    Arg<TF_NumberTensor, [{1-D.  The `values` of the second `SparseTensor`, size `[nnz]` Vector.}]>:$b_values,