lafs.put(SessionManager.getSession().getUserAgent().getBrowserType(), laf);
        public LookAndFeel create()                throws IOException {            if (laf == null) {                synchronized (Default.class) {                    if (laf == null) {                        Session session = SessionManager.getSession();                        String lafName = (String) session.getProperty("wings.lookandfeel.default");                        if (lafName == null)                            lafName = DEFAULT_LOOKANDFEEL;                        try {                            Class lafClass = Class.forName(lafName, true, Thread.currentThread().getContextClassLoader());                            laf = (LookAndFeel) lafClass.newInstance();                        } catch (Exception e) {                            log.fatal("create", e);                            throw new IOException(e.getMessage());                        }                    }                }            }            return laf;        }