public byte[] get(ColumnFamilyHandle columnFamilyHandle, byte[] key) {
    Preconditions.checkArgument(!closed);
    try {
      Preconditions.checkArgument(key != null, "keys in rocksdb can not be null!");
      Preconditions.checkNotNull(columnFamilyHandle, "Column Family Handle couldn't be null!");
      return rocksDB.get(columnFamilyHandle, key);
    } catch (Exception e) {
      throw new AmoroIOException(e);
    }
  }
Retrieve a value for a given key in a column family.

@param columnFamilyName Column Family Name
@param key Key to be retrieved
amoro-format-iceberg/src/main/java/org/apache/amoro/utils/map/RocksDBBackend.java