code: def add(self, game_object: Hashable, tags: Iterable=())-> None:
          
          self.game_objects.add(game_object, tags)
docs: Add a game_object to the scene.
  
          game_object: Any GameObject object. The item to be added.
          tags: An iterable of Hashable objects. Values that can be used to
                retrieve a group containing the game_object.
  
          Examples:
              scene.add(MyGameObject())
  
              scene.add(MyGameObject(), tags=("red", "blue")