Get a count of checked out elements by the user in the model

[luisPDAN6]

What is the preferred way to get a count of checked out elements owned by the user?  I tried:

ICollection<ElementId> checkoutelements = WorksharingUtils.CheckoutElements(doc, null);
int count = checkoutelements.Count;

But i cannot pass null on the CheckoutElements method. And I would prefer not to checkout a random element just to get a count.