private void OnDestroy()
        {
            enableProcessing = false;

            if (cloudSpatialAnchorSession != null)
            {
                cloudSpatialAnchorSession.Dispose();
                cloudSpatialAnchorSession = null;
            }

            if (anchorLocateCriteria != null)
            {
                anchorLocateCriteria = null;
            }

            _instance = null;
        }
        /// <summary>
        /// Start is called on the frame when a script is enabled just before any
        /// of the Update methods are called the first time.
        /// </summary>
        public override void Start()
        {
            feedbackBox = XRUXPicker.Instance.GetFeedbackText();
            if (feedbackBox == null)
            {
                Debug.Log($"{nameof(feedbackBox)} not found in scene by XRUXPicker.");
                Destroy(this);
                return;
            }

            CloudManager = AzureSpatialAnchorsDemoWrapper.Instance;

            if (CloudManager == null)
            {
                feedbackBox.text = "AzureSpatialAnchorsDemoWrapper doesn't exist in the scene. Make sure it has been added.";
                return;
            }

            if (!SanityCheckAccessConfiguration())
            {
                feedbackBox.text = $"{nameof(AzureSpatialAnchorsDemoWrapper.SpatialAnchorsAccountId)} and {nameof(AzureSpatialAnchorsDemoWrapper.SpatialAnchorsAccountKey)} must be set on AzureSpatialAnchorsDemoConfig in Examples/Resources";
            }


            if (AnchoredObjectPrefab == null)
            {
                feedbackBox.text = "CreationTarget must be set on the demo script.";
                return;
            }

            CloudManager.OnSessionUpdated         += CloudManager_SessionUpdated;
            CloudManager.OnAnchorLocated          += CloudManager_OnAnchorLocated;
            CloudManager.OnLocateAnchorsCompleted += CloudManager_OnLocateAnchorsCompleted;
            CloudManager.OnLogDebug     += CloudManager_OnLogDebug;
            CloudManager.OnSessionError += CloudManager_OnSessionError;

            base.Start();
        }