Detect if a session is a demo session

[Jonas]

Is there a way to detect if an oTree session is a demo session or a regular session? I would like to implement the option to skip certain pages in demo mode. I guess this would be possible by putting a "test_mode" boolean in the session config that is true in demo sessions but false otherwise, but i would prefer a more direct way to avoid the risk of accidentely selecting the demo version for a real session.

[Chris @ oTree]

Hi, there is no official indicator whether a session is a demo session or not. (There are some internal flags in the database but it is not stable to rely on undocumented features.) 

Actually I consider the session config technique to be a pretty decent solution for this.