DrawRoundRectGradient
virtual void DrawRoundRectGradient(const BRect& rect, const BPoint& radii, BGradient& gradient,
callbacks.DrawRoundRectGradient(*rect, *radii, *gradient,
virtual void DrawRoundRectGradient(const BRect& rect, const BPoint& radii, BGradient& gradient,
virtual void DrawRoundRectGradient(const BRect& rect, const BPoint& radii, BGradient& gradient,
virtual void DrawRoundRectGradient(const BRect& rect, const BPoint& radii, BGradient& gradient,