How does getProperties() method work?

[goddard at seznam.cz]

Hi,

I wanted to query a Rectangle for its properties with getProperties() method, but it always returns empty Map (no elements, zero size).
For example, I've got a Rectangle defined like this:

Rectangle red = RectangleBuilder.create()
                .x(100).y(100)
                .width(100).height(100)
                .fill(Color.RED)
                //.stroke(Color.BLACK).strokeWidth(3).strokeType(StrokeType.OUTSIDE)
                .rotate(45)
                .build();

Regards, Jiri