}
  }
  public static void init(String filename) {
    spawnSigns.clear();
    new DataReader(filename) {
      public void read(DataInputStream stream) throws IOException {
        int count = stream.readInt();
        for (;count > 0; --count) {
          SpawnSign sign = SpawnSign.read(stream);
          spawnSigns.put(sign.getWorldName(), sign.getLocation(), sign);