public class PacketUtils {
    private static final ProtocolManager protocolManager = ProtocolLibrary.getProtocolManager();

    public static void setHelmet(Player player, ItemStack helmetItem) {

        PacketContainer equipmentPacket = getHelmetPacket(player, helmetItem);

        for (Player targetPlayer : Bukkit.getServer().getOnlinePlayers()) {
            if (!targetPlayer.equals(player)) {
                System.out.println(player.getName() + " -> " + targetPlayer.getName());
                sendPacket(targetPlayer, equipmentPacket);
            }
        }
    }

    public static PacketContainer getHelmetPacket(Player player, ItemStack helmetItem) {
        PacketContainer packet = protocolManager.createPacket(PacketType.Play.Server.ENTITY_EQUIPMENT);

        packet.getIntegers().write(0, player.getEntityId()).write(1, 4);

        packet.getItemModifier().write(0, helmetItem);
        return packet;
    }

    public static void sendPacket(Player player, PacketContainer packer) {
        protocolManager.sendServerPacket(player, packer);
    }

}