{"ast_node_type":"variable","tokens":[{"end":72,"kind":"keyword","start":0,"text":"let"}]}
                    let loc = self.db.lookup_intern_macro_call(call_id);
                Ok(ResolvedAttr::Macro(call_id)) => {
                    if let MacroDefKind::ProcMacro(_, exp, _) = loc.def.kind {