It was inspired by but not connected to that discussion.

It was only automated in that I used a tool to find the instances.

White vs clear - They mean the same thing (maybe I jumped to a conclusion there), and white is used a lot more than clear.

I think it's from the Vespucci option for 'types of vehicles which can be charged' https://photos.app.goo.gl/Ub4jq2b2deTKyPbY6