Readonly[ReadonlyfallbackFallback render function when no route matches
ReadonlylayoutsLayout wrappers to apply (in order, inside-out)
ReadonlyroutesAll routes in this router
ReadonlyscrollRouter-level default scroll behavior. Applied on push/replace when a
matched route has no _scrollBehavior of its own. If unset, the
framework default is "top".
A router containing routes and configuration.