{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx|"}]}
        ecx.probe_builtin_trait_candidate(BuiltinImplSource::Misc).enter(|ecx| {
        let cx = ecx.cx();
            let ty = goal.predicate.self_ty();