{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":")"}]}
    ) -> Result<(CanonicalResponse<I>, Option<TraitGoalProvenVia>), NoSolution> {
        goal: Goal<I, TraitPredicate<I>>,
        let candidates = self.assemble_and_evaluate_candidates(goal, AssembleCandidatesFrom::All);