public static byte[] disabledNPC(List<Integer> ids) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter(3 + ids.size() * 4);

        mplew.writeShort(SendPacketOpcode.DISABLE_NPC.getValue());
        mplew.write(ids.size());
        for (Integer i : ids) {
            mplew.writeInt(i);
        }

        return mplew.getPacket();
    }