pub fn create_pointer_barrier<'c, 'input, Conn>(
conn: &'c Conn,
barrier: Barrier,
window: Window,
x1: u16,
y1: u16,
x2: u16,
y2: u16,
directions: BarrierDirections,
devices: &'input [u16],
) -> Result<VoidCookie<'c, Conn>, ConnectionError>where
Conn: RequestConnection + ?Sized,