static S doPostSilentlyWithTimeout(long timeout, Map urlParameters, S url) {
  ret doPostSilentlyWithTimeout(timeout, makePostData(urlParameters), url);
}

static S doPostSilentlyWithTimeout(long timeout, S urlParameters, S url) {
  doPost_silently.set(true);
  doPost_timeout.set(timeout);
  ret doPost(urlParameters, url);
}