pub fn ungrab_device_key<Conn, A, B>(
    conn: &Conn,
    grab_window: Window,
    modifiers: ModMask,
    modifier_device: A,
    key: B,
    grabbed_device: u8
) -> Result<VoidCookie<'_, Conn>, ConnectionError>
where Conn: RequestConnection + ?Sized, A: Into<u8>, B: Into<u8>,