B.addAttribute("ui.bar", "foo");
C.addAttribute("truc"); // Not prefixed by UI, will not pass.
S1.addAttribute("ui.foo", "bar");
main.stepBegins(1);
toMain.pump();
// We ask the Swing thread to modify the graphic graph.
main.stepBegins(2);
main.addAttribute("ui.EQUIP"); // Remember GraphicGraph filters