void onFailed(WrappedRequest wrappedRequest, string reason)
        {
            // Handle failure
            Debug.LogError(reason);

            // Update example UI
            failed++;
            updateUI();
        }
        void onCompleted(WrappedRequest wrappedRequest)
        {
            // Handle completed WebRequest
            var request = wrappedRequest.Request;

            Debug.Log("Download completed with size: " + request.downloadHandler.data.Length);

            // Update example UI
            completed++;
            updateUI();
        }