@Override
 public void accept() {
   _party.addPlayer(_player);
   Core.getBroadcastHandler()
       .partyChannel(
           _party,
           Core.getPlayerHandler().<String>getElement(_player, "player_displayName")
               + " join the party");
 }
 @Override
 public void refuse() {
   _party.Send(
       Core.getPlayerHandler().<String>getElement(_player, "player_displayName")
           + " refuse to join the party");
 }