l = (String) s.getChildItem(Signal.LANGUAGE);
l = (String) s.getChild(Signal.LANGUAGE);
    public void send(Signal s) throws Exception {        String l = null;        if (s != null) {            l = (String) s.getChildItem(Signal.LANGUAGE);                        if (l != null) {                if (l.isEqualTo(Signal.GUI_LANGUAGE)) {                    Screen scr = (Screen) getChildItem(Launcher.SCREEN);                    if (scr != null) {                        log(Launcher.DEBUG_LOG_LEVEL, "Show on screen.");                        scr.show((UserInterface) s.getChildItem(Signal.OBJECT));                    } else {                        throw new Exception("Could not send signal. The screen is null.");                    }                }            } else {                throw new Exception("Could not send signal. The language is null.");            }        } else {            throw new Exception("Could not send signal. The signal is null.");        }    }