Map MXNet's hard_sigmoid operator attributes to onnx's HardSigmoid operator
    and return the created node.

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

    # Converting to float32
    alpha = float(attrs.get("alpha", 0.2))
    beta = float(attrs.get("beta", 0.5))

    node = onnx.helper.make_node(
        'HardSigmoid',
        input_nodes,
        [name],
        alpha=alpha,
        beta=beta,
        name=name
    )
    return [node]