ISavable

This is an interface that is used to save and load datas about actors and characters

Function	Description
GetPersistentID	Get the id of the actor which will be used to identify this actor persistently across different sessions
GetSaveData	Return a FSavableData struct that contains the datas to save about the actor
LoadFromData	Update the actor based on datas given in parameters. (ie. Update location of the actor)
HandleSaveGameLoaded	Is called when the save game has been loaded. It loads datas from the save game
MarkAsDestroyed	Mark the actor as destroyed in the save game