Function XESetBeforeFlush 

pub unsafe extern "C" fn XESetBeforeFlush(
    _3: *mut _XDisplay,
    _2: i32,
    _1: Option<unsafe extern "C" fn(*mut _XDisplay, *mut XExtCodes, *const i8, i64)>,
) -> Option<unsafe extern "C" fn(*mut _XDisplay, *mut XExtCodes, *const i8, i64)>