At every page request, we look for that information stored in the session.

Do these classes store all the data information and have none or little behavior information in them?

But what if there were a means to store and search all the information about the movies in our personal collection?

In this case, it would store its decisions, and then update the array of nodes after its last decision.

In this section, you see how to generate keys that let you store data for each user session.