I usually don’t like hiding code behind custom transformers or keeping bookmarks collapsed, so I avoid that approach. At the same time, I often need to turn off feature caching for specific parts of my workbench. Right now the only way to do that is to collapse the bookmark, which messes up my layout.
It would be great to have an option on each bookmark to toggle feature caching on or off without having to collapse it. That way you can see your code and layout exactly as you want, while still controlling caching behavior where you need it.