{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"output_macro_rules_scopes:"}]}
    output_macro_rules_scopes: FxHashMap<LocalExpnId, MacroRulesScopeRef<'ra>>,
    /// include all the `macro_rules` items and other invocations generated by them.
    /// `macro_rules` scopes produced by `macro_rules` item definitions.