{"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"DeprecatedSince::Future"}]}
            DeprecatedSince::Future => false,
            DeprecatedSince::RustcVersion(since) => since <= RustcVersion::CURRENT,
            // The `since` field doesn't have semantic purpose without `#![staged_api]`.