public void saveSigns() {
        if (plugin.signSet != null) {
            try {
                FileOutputStream fos = new FileOutputStream("plugins/ClassSign/signs.dat");
                ObjectOutputStream oos = new ObjectOutputStream(fos);
                   
                oos.writeObject(plugin.signSet);
                Main.log.info("[ClassSign] Saved signs successfully.");

                oos.close();
            } catch (IOException e) {
                Main.log.warning("[ClassSign] Error! Unable to save signs: " + e.getMessage());
            }
        }
    }