private static async Task ExecuteRequestsAsync(
            ConcurrentDictionary <string, NetworkRequestCallback> queue,
            NetworkRequestCallback requestCallback,
            CancellationTokenSource cts)
        {
            if (cts.IsCancellationRequested)
            {
                queue.AddOrUpdate(
                    requestCallback.Request.Identifier.ToString(),
                    requestCallback,
                    (s, callback) => requestCallback);

                return;
            }

            NetworkRequest        request         = requestCallback.Request;
            WeakReferenceCallback successCallback = requestCallback.SuccessCallback;
            WeakReferenceCallback errorCallback   = requestCallback.ErrorCallback;

            try
            {
                object response = await request.ExecuteAsync(successCallback.Type);

                successCallback.Invoke(response);
            }
            catch (Exception ex)
            {
                successCallback.Invoke(Activator.CreateInstance(successCallback.Type));
                errorCallback.Invoke(ex);
            }
        }