pub unsafe extern "C" fn XESetBeforeFlush(
    _3: *mut _XDisplay,
    _2: i32,
    _1: Option<unsafe extern "C" fn(_: *mut _XDisplay, _: *mut XExtCodes, _: *const i8, _: i32)>
) -> Option<unsafe extern "C" fn(_: *mut _XDisplay, _: *mut XExtCodes, _: *const i8, _: i32)>