type LineGauge = {
filled_style: &[Style, null],
filled_symbol: &[string, null],
label: &[Line, null],
ratio: &f64,
style: &[Style, null],
unfilled_style: &[Style, null],
unfilled_symbol: &[string, null],
};
val line_gauge: fn(
?#filled_style: &[Style, null],
?#filled_symbol: &[string, null],
?#label: &[Line, null],
?#style: &[Style, null],
?#unfilled_style: &[Style, null],
?#unfilled_symbol: &[string, null],
ratio: &f64
) -> Tui;