@Override
 public String inputLine(Prompt prompt) throws InterruptedException {
   return shell.readLine(prompt);
 }
 @Override
 public void println(String msg) {
   shell.write(msg + Config.getLineSeparator());
 }
 @Override
 public KeyAction input() throws InterruptedException {
   return shell.read();
 }
 @Override
 public void print(String msg) {
   shell.write(msg);
 }