mLuceneOp.prepare(mbx, res, mbidx, mHitsPerChunk);
mLuceneOp.prepare(mbx, res, mbidx, mParams, mHitsPerChunk);
    protected void prepare(Mailbox mbx, ZimbraQueryResultsImpl res, MailboxIndex mbidx, int chunkSize) throws ServiceException, IOException    {        if (chunkSize > MAX_HITS_PER_CHUNK) {            chunkSize = MAX_HITS_PER_CHUNK;        }        mHitsPerChunk = chunkSize;        setupResults(mbx, res);        if (mLuceneOp != null) {            mHitsPerChunk *= 2; // enlarge chunk size b/c of join            mLuceneOp.setDBOperation(this);            mLuceneOp.prepare(mbx, res, mbidx, mHitsPerChunk);        }    }