default void rawValueAt(int index, BytePiece bytes) {
        UTF8String string = stringValueAt(index);
        bytes.base = string.getBaseObject();
        bytes.addr = string.getBaseOffset();
        bytes.len = string.numBytes();
    }
The memory <code>bytes</code> pointed to should considered being freed or changed at any time.
indexr-segment/src/main/java/io/indexr/segment/DPValues.java