In one of our customer projects, the toggleable region in the scrollcontainer of a layout grid is very usefull. In the perfect world, this customer wants to toggle both the left and the right container. Now there is an error when a scrollcontainer has a left and right region with both the toggle modes turned on.
Today, six years later, this is in a requirement of a story of my customer. Alas, still the error message states that only one side is allowed to toggle.