It should be possible to integrate custom containers for TopControls, View and BottomControls sections of MultiViews and SingleViews. All controls which are placed inside of such a section should then be direct children of the custom control.
It would be an option to provide overridable factory methods for the initialization of the used placeholder controls. This solution would work for TopControls, View and BottomControls of SingleView and TopControls and BottomControls of MultiView. For the View section of MultiView, it would probably be more complicated.