static <A extends Image> A copyImageToClipboard(A img) {
  TransferableImage trans = new TransferableImage(img);
  Toolkit.getDefaultToolkit().getSystemClipboard().setContents( trans, null);
  vmBus_send('newClipboardContents, img);
  print("Copied image to clipboard (" + img.getWidth(null) + "*" + img.getHeight(null) + " px)");
  ret img;
}