What the title says. In Apollo, you were able to configure that if you swipe a comment left, it collapses the entire comment tree from the current top level comment.
That made it easy to jump to the next top level comment after reading responses a few levels deep, if you know what I mean.
Oh, gotcha. I always just tapped on the top comment of the tree I wanted to collapse, so I thought you meant the same thing I was doing.