@SuppressWarnings("UseOfSystemOutOrSystemErr")
    private void sendAndWaitForResponse(String out, Integer key) throws CertificateException {
      synchronized (this) {
        System.out.println(out);
      }
      ourMultiplexor.waitForResponse(key);
    }
@SuppressWarnings("UseOfSystemOutOrSystemErr")
    private void sendAndWaitForResponse(String out, Integer key)