{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"MacroDefKind::BuiltIn(_,"}]}
                    MacroDefKind::BuiltIn(_, it) => {
                        .expand(db, arg.clone(), macro_call_id, span),
                        it.expand(db, macro_call_id, arg, span).map_err(Into::into).zip_val(None)