{"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"self.tcx.check_const_stability(def_id,"}]}
                    self.tcx.check_const_stability(def_id, t.trait_ref.path.span, span);
                if let Some(def_id) = t.trait_ref.trait_def_id() {
                }