unsigned AddBezier(const Bezier & bezier);
unsigned Add(ObjectType type, const Rect & bounds, unsigned data_index = 0);
unsigned AddBezierData(const Bezier & bezier);
unsigned AddBezier(const Bezier & bezier);
unsigned Add(ObjectType type, const Rect & bounds, unsigned data_index = 0);
unsigned AddBezierData(const Bezier & bezier);