This is a global class for dealing with worlds. There is only ever one universe. All worlds register themselves in the universe when created.
Clear all worlds.
Manually add a world to the universe. Usually never needed.
Manually remove a world from the universe.
Move one object from its world to another.
Move all objects in one world to another.
Return a new world in-between two other. All world parameters are interpolated but objects stay.
Interpolates and also move over all objects. Usually you will want to remove the old worlds manually.
Save all worlds and objects and their respective state to disk.
Import worlds and objects and their respective state from disk.
Return an array of all available worlds.