{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"if"}]}
        if self.feat.staged_api() || self.tcx.sess.opts.unstable_opts.force_unstable_if_unmarked {
        // the stability attributes are even enabled before using their queries.
            if let Some(stab) = self.tcx.lookup_default_body_stability(def_id) {