- void add_track(Track &);
- void add_tracks(const std::set<Track *> &);
- void add_track_chain(const TrackIter &, const TurnoutMap &);
- const std::set<Track *> &get_tracks() const { return tracks; }
- bool has_track(Track &) const;
- void save(std::list<Msp::DataFile::Statement> &) const;