{"ast_node_type":"other","tokens":[{"end":75,"kind":"keyword","start":0,"text":"match"}]}
                match ret_val.entry(MacroRulesNormalizedIdent::new(bind)) {
            if let &MatcherLoc::MetaVarDecl { span, bind, .. } = loc {
                    Vacant(spot) => spot.insert(res.next().unwrap()),