{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":")"}]}
    ) -> (Option<DefId>, Vec<(ty::PredicateKind<'tcx>, Span)>) {
        def_id: DefId,
        let ty::GenericPredicates { parent, predicates } = self.tcx.predicates_of(def_id);