static S clipboardBot(S s) {
  new Matches m;
  
  if "get clipboard" {
    S text = getTextFromClipboard();
    if (text != null)
      ret structure(ll("text", text));
    BufferedImage img = getImageFromClipboard();
    if (img != null)
      ret structure(ll("png", toPNG(img)));
    ret "empty or unknown";
  }
  
  null;
}