presto-blackhole/src/main/java/io/prestosql/plugin/blackhole/BlackHolePageSink.java/BlackHolePageSink/BlackHolePageSink
class BlackHolePageSink:    public BlackHolePageSink(ListeningScheduledExecutorService executorService, Duration pageProcessingDelay)
    {
        this.executorService = requireNonNull(executorService, "executorService is null");
        this.pageProcessingDelayMillis = requireNonNull(pageProcessingDelay, "pageProcessingDelay is null").toMillis();
    }