#[no_mangle]
extern "C" fn ICU4XCaseMapper_titlecase_segment_with_only_case_data_v1(
this: &ICU4XCaseMapper,
s_diplomat_data: *const u8,
s_diplomat_len: usize,
locale: &ICU4XLocale,
options: ICU4XTitlecaseOptionsV1,
write: &mut DiplomatWriteable,
) -> DiplomatResult<(), ICU4XError>