code: protected byte[] get(ColumnFamilyHandle cfh, ReadOptions readOptions, byte[] key)
              throws RocksDbException {
          try {
              return rocksDb.get(cfh, readOptions != null ? readOptions : this.readOptions, key);
          } catch (Exception e) {
              throw e instanceof RocksDbException ? (RocksDbException) e : new RocksDbException(e);
          }
      }
docs: Gets a value.
  
  @param cfh
  @param readOptions
  @param key
  @return
  @throws RocksDbException