private void deleteCellsAtTimestamps( TransactionManager txManager, String tableName, Multimap<Cell, Long> cellToTimestamp, Transaction.TransactionType transactionType) { if (!cellToTimestamp.isEmpty()) { for (Follower follower : followers) { follower.run(txManager, tableName, cellToTimestamp.keySet(), transactionType); } keyValueService.addGarbageCollectionSentinelValues(tableName, cellToTimestamp.keySet()); keyValueService.delete(tableName, cellToTimestamp); } }