runNextBatch = () => {
    const batchEnd = Math.min(this.batchRow_ + this.batchSize, rowCount);
    while (this.batchRow_ < batchEnd) {
      // Matching rows are pushed in order of searching to keep list sorted.
      if (this.findInRow_(this.batchRow_)) {
        this.matchingRowsIndex_.push(this.batchRow_);
      }
      this.batchRow_++;
    }
    if (this.batchRow_ < rowCount) {
      this.pendingFind_ = setTimeout(runNextBatch);
    } else {
      this.stopSearch();
    }
    ++this.batchNum_;
    this.runBatchCallbackForTest_(this.batchNum_);
    this.updateCounterLabel_();
  }
Enable batch-wise searching when search text changes.