public static void write(DataOutputStream out, String group, String prefix) {
        ByteBuf buf = Unpooled.buffer();
        Util.writeVarInt(buf, 0x02); //packet id
        Util.writeString(buf, "Internetak);

        int lenght = buf.readableBytes();
        byte[] packet = new byte[lenght];
        buf.readBytes(packet);
        try {
            Util.writeVarInt(out, lenght);
            out.write(packet);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }