class LogWriterImpl implements InternalLogWriter {

  public static String allowedLogLevels() {
    StringBuilder sb = new StringBuilder(64);
    for (int i = 0; i < levelNames.size(); i++) {
      if (i != 0) {
        sb.append('|');
      }
      sb.append(levelNames.get(i));
    }
    return sb.toString();
  }

  protected  LogWriterImpl();

}