Function eschers::picture::beside_ratio

pub fn beside_ratio<P, Q>(
    picture_p: Rc<P>, 
    picture_q: Rc<Q>, 
    m: u8, 
    n: u8
) -> Rc<impl Fn(&Bx) -> Rendering> where
    P: Fn(&Bx) -> Rendering,
    Q: Fn(&Bx) -> Rendering, 

Stack pictures beside each other according to weight