{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"sender.send(Task::PrimeCaches(PrimeCachesProgress::Begin)).unwrap();"}]}
                sender.send(Task::PrimeCaches(PrimeCachesProgress::Begin)).unwrap();
            move |sender| {
                let res = analysis.parallel_prime_caches(num_worker_threads, |progress| {