def METHOD_NAME(self, y, z):
    """Cell edge heat transfer coefficient [W.m-2.K-1]"""
    inputs = {
        "Distance along electrode width [m]": y,
        "Distance along electrode height [m]": z,
    }
    return pybamm.FunctionParameter(
        "Edge heat transfer coefficient [W.m-2.K-1]",
        inputs,
    )