public static void CollapseAndWait(this SplitButton splitButton)
{
if (splitButton == null)
{
Log.Error("Attempted to collapse a null split button! Dumping context...");
DumpHelper.DumpFullContext();
throw new ArgumentNullException("splitButton");
}
using (var waiter = splitButton.GetCollapsedWaiter())
{
splitButton.Collapse();
waiter.Wait();
}
Wait.ForIdle();
}