private void handleLogSegmentDeletedBucketUpdate(ScanResults results, IndexValue indexValue, long deleteTimeInMs,
      int operator) {
    if (isWithinRange(results.logSegmentForecastStartTimeMsForDeleted, results.logSegmentLastBucketTimeMsForDeleted,
        deleteTimeInMs)) {
      results.updateLogSegmentDeletedBucket(results.getLogSegmentDeletedBucketKey(deleteTimeInMs),
          indexValue.getOffset().getName(), indexValue.getSize() * operator);
    }
  }
Helper function for log segment buckets for blob expiration/deletion related updates.
@param results the {@link ScanResults} to be updated
@param indexValue the PUT {@link IndexValue} of the expiring/deleting blob
@param deleteTimeInMs delete time of the blob in ms
@param operator indicating the operator of the update, 1 for add and -1 for subtract
ambry-store/src/main/java/com/github/ambry/store/BlobStoreStats.java