class Shell {

  static String bashQuote(String arg) {
    StringBuilder buffer = new StringBuilder(arg.length() + 2);
    buffer.append('\'');
    buffer.append(arg.replace("'", "'\\''"));
    buffer.append('\'');
    return buffer.toString();
  }

  protected  Shell();
  protected  Shell(long interval);
  protected  Shell(long interval, boolean redirectErrorStream);

}