{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"macro_rules_scopes:"}]}
    macro_rules_scopes: FxHashMap<LocalDefId, MacroRulesScopeRef<'ra>>,
    /// `macro_rules` scopes produced by `macro_rules` item definitions.
    /// Helper attributes that are in scope for the given expansion.