{"ast_node_type":"function","tokens":[{"end":87,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn eval_default_body_stability(self, def_id: DefId, span: Span) -> EvalResult {
    /// unstable feature otherwise.
        let is_staged_api = self.lookup_stability(def_id.krate.as_def_id()).is_some();