const std::set<Track *> &get_tracks() const { return tracks; }
bool has_track(Track &) const;
const std::vector<Endpoint> &get_endpoints() const { return endpoints; }
+ const Endpoint &get_endpoint(unsigned) const;
int get_endpoint_by_link(Block &) const;
float get_path_length(unsigned, const Route * = 0) const;
void check_link(Block &);