A yes. MvM, where the Supreme Court said, in essence, "Well, we would find for party X, except that because in this particular case the proposed remedy would be moot, we find for party Y." Given that the proposed remedy was, in fact, moot by the time the case was decided, party X couldn't really object. And since party Y won, Y couldn't really squawk either. Hence the court managed to issue a precedent-setting opinion which nobody could squawk about.