panel.add(center, cc.xy(1, 2));
panel.add(bottom, cc.xy(1, 3));
panel.add(fill, cc.xy(1, 4));
panel.add(def, cc.xy(1, 5));
panel.doLayout();
assertEquals("Top.y", 0, top.getY());
assertEquals("Top.height", 4, top.getHeight());
assertEquals("Center.y", 13, center.getY());
assertEquals("Center.height", 4, center.getHeight());