!7

p-experiment-tt {
  final LineBuffer buf = new(voidfunc(S line) {
    print(">> " + line);
  });
  
  webSocketOnMessage(webSocketButterBot(#1015684), voidfunc(S s) {
    new Matches m;
    if (startsWith(s, "+", m))
      buf.append(m.rest());
  });
}