{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"///"}]}
    /// `macro_rules` scopes produced by `macro_rules` item definitions.
    output_macro_rules_scopes: FxHashMap<LocalExpnId, MacroRulesScopeRef<'ra>>,
    macro_rules_scopes: FxHashMap<LocalDefId, MacroRulesScopeRef<'ra>>,