How to interpret $ionicHistory.viewHistory() output

Dear experts,
What get stored in the stack Array?
What get stored in the views?

According to the ionic doc “By default, Ionic will cache a maximum of 10 views”, where are these views stored?

btw, the source code page link is broken https://github.com/driftyco/ionic/tree/1.x/js/angular/service/history.js#L1
thx .
Lola