@Override
    public boolean onCommand (CommandSender sender, Command arg1, String arg2, String [ ] arg3 ) {
        if ( ! (sender instanceof Player ) ) {
            return true ;
        }
        Player player = (Player )sender ;
        if (PuerkasPartyAPI. isInParty (player ) ) {
            player. sendMessage ( "§7[§dParty§7] §aYou are in a party :)" ) ;
        } else {
            player. sendMessage ( "§7[§dParty§7] §cYou are not in a party :(" ) ;
        }
        if (PuerkasPartyAPI. isInParty (player ) ) {
            if (PuerkasPartyAPI. getPartyLeader (player ) == player ) {
                player. sendMessage ( "§7[§dParty§7] §aYou're the leader of this party :D" ) ;
            } else {
                player. sendMessage ( "§7[§dParty§7] §aThe leader of this party is §b" + PuerkasPartyAPI. getPartyLeader (player ). getName ( ) ) ;
            }
            player. sendMessage ( "§3Members:" ) ;
            for (Player players : PuerkasPartyAPI. getPartyMembers (player ) ) {
                player. sendMessage ( String. join ( ", ", players. getName ( ) ) ) ;
            }
        }
        return false ;
    }