static S sendToLocalBotOptQuietly(S bot, S text, O... args) {
  if (bot == null) return null;
  text = format(text, args);
  temp DialogIO channel = findBot(bot);
  if (channel == null) null;
  try {
    channel.readLine();
    channel.sendLine(text);
    S s = channel.readLine();
    return s;
  } catch (Throwable e) {
    e.printStackTrace();
    null;
  }
}