pub unsafe fn ureldatefmt_combineDateAndTime(
    reldatefmt: *const URelativeDateTimeFormatter,
    relativedatestring: *const u16,
    relativedatestringlen: i32,
    timestring: *const u16,
    timestringlen: i32,
    result: *mut u16,
    resultcapacity: i32,
    status: *mut UErrorCode
) -> i32