Is [ButtonPresenter] in the new spec2? In Spec1, anyway, it seems to be subclassed from [AbstractWidgetPresenter] which is subclassed from [ComposablePresenter], but doesn't seem anywhere in the Spec2 package, as far as I can tell.
I checked spotter and it seems [ButtonPresenter] is deprecated now. What is the "Spec2" way of placing buttons? There are references to it in some of the demos, but I can't get the demos to work.
