- Route *create_lead_route(Route *, const Route *);
- bool is_valid_for_track(const Route &, Track &) const;
- bool advance_to_track(RouteList::iterator &, Track &);
+ bool create_lead_route();
+ bool is_valid_for_track(const Route &, const TrackIter &) const;
+ bool advance_to_track(RouteList::iterator &, const TrackIter &);