{"ast_node_type":"variable","tokens":[{"end":87,"kind":"keyword","start":0,"text":"let"}]}
            let scope = self.r.arenas.alloc_macro_rules_scope(MacroRulesScope::Binding(
            self.r.feed_visibility(feed, vis);
                self.r.arenas.alloc_macro_rules_binding(MacroRulesBinding {