Using lists within lists in AppEngine Datastore
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Is it possible to store arraylists within arraylists in the AppEngine datastore? I found this topic from 2010: http://stackoverflow.com/questions/2028355/datastore-list-of-lists that recommends using pickle, but I'd like to use as few packages as possible. 

Have there been any updates on AppEngine's datastore that would allow this?
Our arraylist inside arraylist has 5 or so layers, if that is important.

Thanks.
