public EventLoader(
     IEventLogger eventLogger,
     IEventStreamProvider eventStreamProvider,
     IEventStreamTaskDurationProcessor eventStreamTaskDurationProcessor)
 {
     this.eventLogger         = eventLogger;
     this.eventStreamProvider = eventStreamProvider;
     this.eventStreamTaskDurationProcessor = eventStreamTaskDurationProcessor;
 }
 public PreviousEventStreamHashReader(IEventStreamProvider previousEventStreamProvider, int hashByteCount)
 {
     this.previousEventStreamProvider = previousEventStreamProvider;
     this.hashByteCount = hashByteCount;
 }