{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"///"}]}
    /// Helper attributes that are in scope for the given expansion.
    macro_rules_scopes: FxHashMap<LocalDefId, MacroRulesScopeRef<'ra>>,
    helper_attrs: FxHashMap<LocalExpnId, Vec<(Ident, NameBinding<'ra>)>>,