public RocksDBConfigurationBuilder databaseDir(final Path databaseDir) {
    this.databaseDir = databaseDir;
    return this;
  }
Database dir.

@param databaseDir the database dir
@return the rocks db configuration builder
plugins/rocksdb/src/main/java/org/hyperledger/besu/plugin/services/storage/rocksdb/configuration/RocksDBConfigurationBuilder.java