@CommandPermissions("worldedit.clipboard.flip")
public void flip(Player player, LocalSession session, EditSession editSession,
@Optional(Direction.AIM) @Direction Vector direction) throws WorldEditException {
ClipboardHolder holder = session.getClipboard();
Clipboard clipboard = holder.getClipboard();
AffineTransform transform = new AffineTransform();
transform = transform.scale(direction.positive().multiply(-2).add(1, 1, 1));
holder.setTransform(holder.getTransform().combine(transform));
player.print("The clipboard copy has been flipped.");
}