{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
        let mut dependents_count: FxHashMap<ClosureId, usize> =
        let mut deferred_closures = mem::take(&mut self.deferred_closures);
            deferred_closures.keys().map(|it| (*it, 0)).collect();