/// <summary>
        /// Process the result of an AllThreads request.
        /// </summary>
        private void ProcessAllThreads(Task<List<ThreadId>> task)
        {
            if (!task.CompletedOk())
            {
                DLog.Error(DContext.DebuggerLibModel, "LoadAllThreads failed", task.Exception);
                task.ForwardException();
                return;
            }

            List<DalvikThread> created = null;
            List<DalvikThread> removed = null;
            lock (threadsLock)
            {
                // Create missing threads
                foreach (var id in task.Result.Where(x => !threads.ContainsKey(x)))
                {
                    // Create and record
                    var thread = CreateThread(id);
                    threads[id] = thread;
                    list.Add(thread);

                    created = created ?? new List<DalvikThread>();
                    created.Add(thread);
                }

                // Remove obsolete threads
                var toRemove = threads.Keys.Where(x => !task.Result.Contains(x)).ToList();
                foreach (var id in toRemove)
                {
                    var thread = threads[id];
                    threads.Remove(id);
                    list.Remove(thread);
                    removed = removed ?? new List<DalvikThread>();
                    removed.Add(thread);
                }
            }

            if (created != null) created.ForEach(OnThreadCreated);
            if (removed != null) removed.ForEach(OnThreadEnd);
        }