{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"let"}]}
                let res = self.r.local_def_id(item.id).to_def_id();
                num_macro_definition_ribs += 1;
                self.ribs[ValueNS].push(Rib::new(RibKind::MacroDefinition(res)));