frameworkOf method
Implementation
FrameworkView? frameworkOf({Page? page}) {
if (_pages.isEmpty) return null;
page ??= _pages.last;
if (_pages.last is! CustomMaterialPage) return null;
if (page is! CustomMaterialPage) return null;
if (page.child is! ModalManagerView) return null;
var manager = page.child as ModalManagerView;
if (manager.model.child is! FrameworkView) return null;
return manager.model.child as FrameworkView;
}