data:extend({
    {
        type = "bool-setting",
        name = "show-max-underground-distance-on-hover",
        setting_type = "startup",
        default_value = false
    },
    {
        type = "string-setting",
        name = "show-max-underground-distance-icon",
        setting_type = "startup",
        default_value = "thick",
        allowed_values = {"thick", "thin", "small"}
    }
})