Lobbyists and other wired-in parties on Capitol Square knew that as the battle heated up over the 2019 bailout measure — House Bill 6 — a geyser of cash was financing the effort to pass and protect it from repeal. It was logical to suspect that the money was coming from a utility industry that stood to benefit. But there was no way to be sure because it was coming through 501(c)(4) dark money groups that don’t have to disclose their donors.