pub fn fill_betweenx<Y, X1, X2>(y: Y, x1: X1, x2: X2) -> FillBetweenXwhere Y: IntoIterator<Item = f64>, X1: IntoIterator<Item = f64>, X2: IntoIterator<Item = f64>,
Create a new FillBetweenX with no options.
FillBetweenX