pub unsafe extern "C" fn XESetErrorString(
_3: *mut Display,
_2: c_int,
_1: Option<unsafe extern "C" fn(*mut Display, c_int, *mut XExtCodes, *mut c_char, c_int) -> *mut c_char>,
) -> Option<unsafe extern "C" fn(*mut Display, c_int, *mut XExtCodes, *mut c_char, c_int) -> *mut c_char>