Harley Training Wheels??

The local Harley dealership has a couple of bikes equipped with this setup.They use them for demonstrating bikes to potential buyers with limited riding experience and/or people who have trouble balancing an 800 lb. bike.
I was at a Goldwing rally several years ago striping and saw a very unique setup on a bike there.
The gentleman who owned the bike was in his mid-70's and had a lot of problems with his legs;specifically his knees.He wasn't able to support a bike when it was stopped and refused to get a trike(I don't blame him;I don't like them either).
This setup used a set of wheels that were electrically lowered when coming to a stop.They stored in the bottom part of the saddlebags and were barely visible when retracted.
As soon as the bike started moving,you pushed a ****on on the handlebars and the wheels retracted pretty quickly.They were set up so the bike leaned slightly to either side and when moving with the bike upright didn't contact the ground.
I don't know who made them but they were a nice idea and allowed someone who had been riding for more than 50 years a chance to keep enjoying himself.