public void GetAddAttemptsCount()
 {
     Assert.AreEqual((ulong)0, ConcurrentPriorityQueue.GetAddAttemptsCount());
     ConcurrentPriorityQueue.Add(Create(0.1f));
     ConcurrentPriorityQueue.Add(Create(0.2f));
     ConcurrentPriorityQueue.Add(Create(0.3f));
     Assert.AreEqual((ulong)3, ConcurrentPriorityQueue.GetAddAttemptsCount());
 }