{"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"StabilityLevel::Stable"}]}
            StabilityLevel::Stable { since, .. } => FeatureStability::AcceptedSince(match since {
            StabilityLevel::Unstable { old_name, .. } => FeatureStability::Unstable { old_name },
                StableSince::Version(v) => Symbol::intern(&v.to_string()),