The ability to take the Airbus into Alternate or Direct Law resides within the design of the autoflight system but is a profoundly non-standard approach with this design and is entirely within test-pilot territory.
Considering the scenario a Qantas crew recently found themselves in, I suspect there are some new Murphy's Law test-pilot members who have filed away the method in their mental toolbox. I filed it from day one on the Airbus but fortunately never had to use it.