How to clear the NServiceBus inMemory gateway persister periodically

DeduplicationCleanup.cs

    public class DeduplicationCleanup : IWantToRunWhenTheBusStarts
    {
        public InMemoryPersistence MemoryPersistence { get; set; }
        public void Run()
        {
            Schedule.Every(TimeSpan.FromMinutes(1))
                //delete all ID's older than 30 minutes
                .Action(()=> MemoryPersistence.DeleteDeliveredMessages(DateTime.UtcNow.AddMinutes(-30)));
        }
    }