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