@Override
  RocksDB getDB() {
    return db;
  }
Instantiates a new Rocks db columnar key value optimistic storage.

@param configuration the configuration
@param segments the segments
@param ignorableSegments the ignorable segments
@param metricsSystem the metrics system
@param rocksDBMetricsFactory the rocks db metrics factory
@throws StorageException the storage exception
plugins/rocksdb/src/main/java/org/hyperledger/besu/plugin/services/storage/rocksdb/segmented/OptimisticRocksDBColumnarKeyValueStorage.java