Notification function called whenever a the translation stage of a subDeepClone operation is about to be started on a database. 

This function is called after all objects, and their owned objects, have been cloned. It is called before any Object IDs are translated 

Object IDs of cloned objects do not point at the cloned objects, and must therefore not not be used at this point for any operations on those objects.

• abortDeepClone
• beginDeepClone
• endDeepClone