#[no_mangle]
extern "C" fn ICU4XTitlecaseMapper_titlecase_segment_v1(
    this: &ICU4XTitlecaseMapper,
    s_diplomat_data: *const u8,
    s_diplomat_len: usize,
    locale: &ICU4XLocale,
    options: ICU4XTitlecaseOptionsV1,
    write: &mut DiplomatWriteable,
) -> DiplomatResult<(), ICU4XError>