public static byte[] rankTitleChange(int gid, String[] ranks) {
            MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

            mplew.writeShort(SendPacketOpcode.GUILD_OPERATION.getValue());
            mplew.write(90);
            mplew.writeInt(gid);
            for (String r : ranks) {
                mplew.writeMapleAsciiString(r);
            }


            return mplew.getPacket();
        }