static Class hotwireSilently(S src) {
  O j = getJavaX();
  Bool b = getThreadLocalOpt(j, "loadPage_silent");
  setThreadLocalOpt(j, "loadPage_silent", true);
  try {
    ret hotwire(src);
  } finally {
    setThreadLocalOpt(j, "loadPage_silent", b);
  }
}