Function harfbuzz_sys::hb_ot_layout_feature_get_characters

pub unsafe extern "C" fn hb_ot_layout_feature_get_characters(
    face: *mut hb_face_t, 
    table_tag: hb_tag_t, 
    feature_index: c_uint, 
    start_offset: c_uint, 
    char_count: *mut c_uint, 
    characters: *mut hb_codepoint_t
) -> c_uint