Map MXNet's depth_to_space operator attributes to onnx's
    DepthToSpace operator and return the created node.

def convert_depthtospace(node, **kwargs):
    """Map MXNet's depth_to_space operator attributes to onnx's
    DepthToSpace operator and return the created node.
    """
    name, input_nodes, attrs = get_inputs(node, kwargs)

    blksize = int(attrs.get("block_size", 0))

    node = onnx.helper.make_node(
        "DepthToSpace",
        input_nodes,
        [name],
        blocksize=blksize,
        name=name,
    )
    return [node]