design question

[Rafael Nami]

Good afternoon everyone.
Our team is having doubts about a usecase needed in our app.
We have a page, that calls a popup that searches some stuff to add,
and adds this stuff to the parent page. The parent page have to be
responsible to save everything. What is the best practice?
Put the entire backing bean in session scope? Use x:saveState in both
parent and popup pages to save the backing bean?

Thanks

Rafael mauricio Nami