How to change QJsonObject value in a QJson hierarchy without using copies?

Question

I am currently using Qt5.0 with the core QJson library to handle some data for the program I am developing.

To set the scene for this question I will provide you with so

Answer 1

According to information from Qt developer who actually wrote QJson in Qt5 -

What's currently included in Qt is a 'read-only' implementation to provide parsing facilities. He has an intention to extend design with 'references' support in future, but it's not yet done.