[Seaside] Seaside 3.1: From session-less to session-aware - WARestfulComponentFilter

[Francois Stephany]

I've just read:

> WARestfulComponentFilter allows applications to easily switch from session-less parts to session-based parts.

in http://code.google.com/p/seaside/wiki/Seaside310Changelog.

Can someone provide a quick example of that? Is there something 
automated in Seaside 3.1 ?