class Layout;
class Track;
class TrackIter;
+class Zone;
class Route: public sigc::trackable
{
public:
static Route *find(const TrackIter &, Track &);
static Route *find(const TrackIter &, const Route &);
+ static Route *find(const TrackIter &, const Zone &);
static Route *find(const TrackIter &, const std::set<Track *> &);
};