Function harfbuzz_sys::hb_font_get_glyph_v_kerning

pub unsafe extern "C" fn hb_font_get_glyph_v_kerning(
    font: *mut hb_font_t,
    top_glyph: hb_codepoint_t,
    bottom_glyph: hb_codepoint_t
) -> hb_position_t