DrawBezierGradient
virtual void DrawBezierGradient(const BPoint controlPoints[4], BGradient& gradient, bool fill)
callbacks.DrawBezierGradient(controlPoints, *gradient,
virtual void DrawBezierGradient(const BPoint controlPoints[4], BGradient& gradient, bool fill);
virtual void DrawBezierGradient(const BPoint controlPoints[4], BGradient& gradient, bool fill);
virtual void DrawBezierGradient(const BPoint controlPoints[4], BGradient& gradient, bool fill);