Function harfbuzz_sys::hb_buffer_diff

pub unsafe extern "C" fn hb_buffer_diff(
    buffer: *mut hb_buffer_t, 
    reference: *mut hb_buffer_t, 
    dottedcircle_glyph: hb_codepoint_t, 
    position_fuzz: c_uint
) -> hb_buffer_diff_flags_t