to my knowledge it's FMGS update S7A/T5A (thales) but i have no other idea than asking your engineering department which software is in your magic box.
documentation-wise in the FCOM i can't find a reference either. this update was announced to be successively introduced to our fleet in the near future. maybe the fact that this update is not fully implemented yet is the reason why the FCOM is still lacking information about this new (hidden
) features.