Maybe we should provide a currying function that returns this predicate...

So this becomes:

Navigator.popUntil(context, ModalRoute.matches('/pesto'));

// in ModalRoute:
static RoutePredicate matches(String routeName) {
  return (Route<dynamic> route) {
    return !route.willHandlePopInternally && route is ModalRoute && route.settings.name == routeName;
  }
}

or maybe "withName" or "hasName" rather than "matches"

I'd thought about providing a utility function ModalRoute.withName(route, name) but it didn't seem useful enough. A ModalRoute.withName(name) that returns a predicate (and factors in willHandlePopInternally, which would be the common case) would be pretty slick.