{"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"self.seen.push(t);"}]}
            self.seen.push(t);
        if let TyKind::Ref(_, mut_ty) | TyKind::PinnedRef(_, mut_ty) = &t.kind {
            if t.span.lo() == self.lifetime.lo() {