text: #ifndef ASTEROIDS_RENDERER
  #define ASTEROIDS_RENDERER
  
  namespace platform
  {
      struct PlatformInfo;
  }
  
  namespace asteroids
  {
      class Renderer
      {
      public:
          virtual ~Renderer (void) = 0;
  
          virtual void Render(void) = 0;
      };
  
      inline Renderer::~Renderer (void) { }
  }
  
  #endif