public void Accept(ProgressEvent progressEvent)
{
progressEvent = progressEvent ?? throw new ArgumentNullException(nameof(progressEvent));
Allocation allocation = progressEvent.GetAllocation();
long progressUnits = progressEvent.GetUnits();
double allocationFraction = allocation.GetFractionOfRoot();
if (progressUnits != 0)
{
progress.Add(progressUnits * allocationFraction);
}
if (completionTracker.UpdateProgress(allocation, progressUnits))
{
// Note: Could produce false positives.
updateNotifier(new Update(progress.Sum(), completionTracker.GetUnfinishedLeafTasks()));
}
}