Function game_loop::game_loop

pub fn game_loop<G, U, R>(
    game: G, 
    updates_per_second: u32, 
    max_frame_time: f64, 
    update: U, 
    render: R
) -> GameLoop<G, Time> where
    U: FnMut(&mut GameLoop<G, Time>),
    R: FnMut(&mut GameLoop<G, Time>),