Function CFStringGetRangeOfComposedCharactersAtIndex 

pub unsafe extern "C-unwind" fn CFStringGetRangeOfComposedCharactersAtIndex(
    the_string: &CFString,
    the_index: CFIndex,
) -> CFRange

👎Deprecated: renamed to CFString::range_of_composed_characters_at_index

Available on crate feature CFString only.