+ void LoadUniverse(const std::string &name, world::Simulation &) const;
+ world::Body *ReadBody(io::TokenStreamReader &, world::Simulation &) const;
+ void ReadBodyProperty(const std::string &name, io::TokenStreamReader &, world::Body &, world::Simulation &) const;
+ void ReadPlanetProperty(const std::string &name, io::TokenStreamReader &, world::Planet &, world::Simulation &) const;
+ void ReadSunProperty(const std::string &name, io::TokenStreamReader &, world::Sun &, world::Simulation &) const;
+