public int getPositionByName(String name) {
   for (MapleMessengerCharacter messengerchar : members) {
     if (messengerchar.getName().equals(name)) {
       return messengerchar.getPosition();
     }
   }
   return 4;
 }
  public void leaveMessenger(int messengerid, MapleMessengerCharacter target)
      throws RemoteException {
    MapleMessenger messenger = WorldRegistryImpl.getInstance().getMessenger(messengerid);
    if (messenger == null) {
      throw new IllegalArgumentException("No messenger with the specified messengerid exists");
    }
    int position = messenger.getPositionByName(target.getName());
    messenger.removeMember(target);

    for (int i : WorldRegistryImpl.getInstance().getChannelServer()) {
      ChannelWorldInterface cwi = WorldRegistryImpl.getInstance().getChannel(i);
      try {
        cwi.removeMessengerPlayer(messenger, position);
      } catch (RemoteException e) {
        WorldRegistryImpl.getInstance().deregisterChannelServer(i);
      }
    }
  }