ProtocolLibHook Code

public class ProtocolLibHook extends PacketAdapter {

    public ProtocolLibHook(Main plugin) {
        super(plugin, ListenerPriority.NORMAL, new PacketType[] { PacketType.Status.Server.SERVER_INFO });
        this.plugin = plugin;
    }

    @SuppressWarnings("deprecation")
    public ProtocolLibHook(Main plugin, boolean b) {
        super(plugin, ListenerPriority.NORMAL, new PacketType[] { PacketType.Status.Server.OUT_SERVER_INFO });
        this.plugin = plugin;
    }

    public static void register(Main plugin) {
        try {
            ProtocolLibrary.getProtocolManager().addPacketListener(new ProtocolLibHook(plugin));
        } catch (NoSuchMethodError ex) {
            ProtocolLibrary.getProtocolManager().addPacketListener(new ProtocolLibHook(plugin, true));
        }
    }

    public Main plugin = (Main) Bukkit.getPluginManager().getPlugin("Main");

    public void onPacketSending (PacketEvent event) {
        try {
            if (Main.plugin.getServer().getPluginManager().getPlugin("ProtocolLib") == null)
                return;

            WrappedServerPing ping = (WrappedServerPing) event.getPacket().getServerPings().read(0);
            Collection<UUID> vanishedPlayers = VanishUtilities.getInstance().listInVanishUUID();
            ping.setPlayersOnline(Bukkit.getOnlinePlayers().size() - VanishUtilities.getInstance().listInVanish().size());
            List<WrappedGameProfile> wrappedGameProfiles = new ArrayList<WrappedGameProfile>(ping.getPlayers());
            Iterator<WrappedGameProfile> iterator = wrappedGameProfiles.iterator();

            while (iterator.hasNext()) {
                if (vanishedPlayers.contains(((WrappedGameProfile) iterator.next()).getUUID())) {
                    iterator.remove();
                }
            }
            ping.setPlayers(wrappedGameProfiles);

        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

}