{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"interp.get(&key).ok_or_else(||"}]}
    interp.get(&key).ok_or_else(|| dcx.create_err(MveUnrecognizedVar { span, key }))
    let key = MacroRulesNormalizedIdent::new(ident);
}