text: #include "game/state.h"
  
  #include <memory>
  
  namespace States
  {
      struct World;
  
      class WorldState : public State
      {
          std::unique_ptr<World> world;
        public:
          WorldState();
          WorldState(WorldState &&);
          WorldState &operator=(WorldState &&);
          ~WorldState();
          void Tick() override;
          void Render() const override;
      };
  }
  