{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//"}]}
                    // Without `box_patterns`, the only legal pattern of type `Box` is `_` (outside
                TyKind::Adt(adt, _) if is_box(self.db, adt.0) => {
                    // of `std`). So this branch is only reachable when the feature is enabled and