in src/DurableSDK/Tasks/ActivityInvocationTask.cs [48:56]
internal override HistoryEvent GetCompletedHistoryEvent(OrchestrationContext context, HistoryEvent scheduledHistoryEvent, bool processed)
{
return scheduledHistoryEvent == null
? null
: context.History.FirstOrDefault(
e => e.TaskScheduledId == scheduledHistoryEvent.EventId
&& (e.EventType == HistoryEventType.TaskCompleted
|| e.EventType == HistoryEventType.TaskFailed));
}