Getting the whole Sublist Object

I've looked through the documentation and I can't seem to find anything to get a whole sublist object with all of its layers. There is record.getSublist(options) but that seems to just return the specified Sublist's properties. For example:

 var addressbook = rec.getSublist({      sublistId: 'addressbook'  }); 

This will return:

 addressbook =         id: addressbook         type: inlineeditor         isChanged: false         isDisplay: true 

But I want it to return the above as well as its lines in the whole sublist.

 addressbook{             currentline{                            example                            example2                           }           line 1 {                     example                     example2                     }           }         

I've found a messy work around to JSON.stringify(rec)
and then JSON.parse(rec) to get it, but nothing else.