Update the validation scene.

Assets/ETSI.ARF/ARF World Storage API/Scripts/AttachToWorldAnchor.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace ETSI.ARF.WorldStorage.UI
+{
+    [ExecuteAlways]
+    public class AttachToWorldAnchor : MonoBehaviour
+    {
+        public GameObject worldAnchor;
+        public bool autoUpdate = true;
+
+        private void Update()
+        {
+            if (autoUpdate && worldAnchor != null)
+            {
+                transform.position = worldAnchor.transform.position;
+                transform.rotation = worldAnchor.transform.rotation;
+            }
+        }
+
+        void OnDrawGizmos()
+        {
+#if UNITY_EDITOR
+            // do something...
+#endif
+        }
+    }
+}

Assets/ETSI.ARF/ARF World Storage API/Scripts/AttachToWorldAnchor.cs.meta

+fileFormatVersion: 2
+guid: 53275cee00d69114f926dc2b69bb4e53
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: