code: def ListingBox(listing, *args, **kwargs):
      " Delegate the boxing to the target's Box class. "
      obj = listing.publishable
      return obj.box_class(obj, *args, **kwargsf ListingBox(listing, *args, **kwargs):
      " Delegate the boxing to the target's Box class. "
      obj = listing.publishable
      return obj.box_class(obj, *args, **kwargs)
docs: Delegate the boxing to the target's Box class.