Function ICU4XDateTime_create_from_codes_in_calendar 

#[unsafe(no_mangle)]
extern "C" fn ICU4XDateTime_create_from_codes_in_calendar(
    era_code_diplomat_data: *const u8,
    era_code_diplomat_len: usize,
    year: i32,
    month_code_diplomat_data: *const u8,
    month_code_diplomat_len: usize,
    day: u8,
    hour: u8,
    minute: u8,
    second: u8,
    nanosecond: u32,
    calendar: &ICU4XCalendar,
) -> DiplomatResult<Box<ICU4XDateTime>, ICU4XError>