From C++ you can take a look at these functions then probably put together a method to do that what you need.
In Savior.cpp:
FCoreUObjectDelegates::PostLoadMapWithWorld.AddUObject(StaticSlot,&USavior::StaticLoadGameWorld);USavior* USavior::ShadowCopySlot(USavior* From, USavior* To, ESaviorResult &Result);void USavior::WriteSlotToFile(const int32 PlayerID, ESaviorResult &Result);