Function draw_sec_y_axis 

pub fn draw_sec_y_axis(
    primary_scale: &dyn Scale,
    sec_axis: &SecAxis,
    coord: &dyn Coord,
    theme: &Theme,
    plot_area: &Rect,
    backend: &mut dyn DrawBackend,
) -> Result<(), RenderError>

Draw a secondary Y axis on the right side.