anchor.diff:     */
     Future<List<String>> registeredAs(String nick) {
       if (_authenticated.containsKey(nick)) {
  -      return new Future.sync(() => _authenticated[nick]);
  +      return new Future.sync(() => [_authenticated[nick]]);
       } else if (_rejected.contains(nick)) {
  -      return new Future.sync(() => null);
  +      return new Future.sync(() => [null, UNLOGGED]);
       } else {
         _completer = new Completer();
         authenticate(nick);
  
positive.code: part of yambot;
  
  class Auth {
  
    /**
     * The auth system this is good for
  
negative.code:         }
        }
        if (!success) {
          _done(null, CHANNEL);
        }
      } else {
        _rejected.add(event.nickname);
        _done(null, UNLOGGED);
      }
    }
  
  