Function gtk::render_frame_gap

pub fn render_frame_gap(
    context: &StyleContext, 
    cr: &Context, 
    x: f64, 
    y: f64, 
    width: f64, 
    height: f64, 
    gap_side: PositionType, 
    xy0_gap: f64, 
    xy1_gap: f64
)