public static Size ApplyIfSet(this Size s, SizeUnit width, SizeUnit height) => new Size(width.AbsoluteOrDefault(s.Width), height.AbsoluteOrDefault(s.Height));
public static Size ApplyIfSet(this Size s, SizeUnit width, SizeUnit height) => new Size(width.AbsoluteOrDefault(s.Width), height.AbsoluteOrDefault(s.Height));