{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc)"}]}
            ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc)
        if let ty::Tuple(..) = goal.predicate.self_ty().kind() {
                .enter(|ecx| ecx.evaluate_added_goals_and_make_canonical_response(Certainty::Yes))