private static extern void Internal_GetChar(IntPtr instance, int id, out CharDesc output);
private static extern void Internal_GetMissingChar(IntPtr instance, out CharDesc output);
private static extern void Internal_getCharDesc(IntPtr thisPtr, uint charId, out CharDesc __output);
private static extern void Internal_getmissingGlyph(IntPtr thisPtr, out CharDesc __output);
private static extern void Internal_setmissingGlyph(IntPtr thisPtr, ref CharDesc value);