minor change in names, privae/public fields, and syntax

Assets/Scenes/ImageTracking/Multi Prefab - Image Tracking/DynamicPrefab.cs

             {
                 case State.ChangeToAlternativePrefab:
                     {
-                        if (alternativePrefab == null)
+                        if (!alternativePrefab)
                         {
                             SetError("No alternative prefab is given.");
                             break;
-                        if (manager == null)
+                        if (!manager)
                         {
                             SetError($"No {nameof(MultiTrackedImageInfoManager)} available.");
                             break;
-                        if (library == null)
+                        if (!library)
-                        if (m_OriginalPrefab == null)
+                        if (!m_OriginalPrefab)
                             m_OriginalPrefab = manager.GetPrefabForReferenceImage(library[0]);
 
                         manager.SetPrefabForReferenceImage(library[0], alternativePrefab);
 
                 case State.ChangeToOriginalPrefab:
                     {
-                        if (m_OriginalPrefab == null)
+                        if (!m_OriginalPrefab)
                         {
                             SetError("No original prefab is given.");
                             break;
-                        if (manager == null)
+                        if (!manager)
                         {
                             SetError($"No {nameof(MultiTrackedImageInfoManager)} available.");
                             break;
-                        if (library == null)
+                        if (!library)
                         {
                             SetError($"No image library available.");
                             break;
             }
         }
     }
-}
+}

Assets/Scenes/ImageTracking/Multi Prefab - Image Tracking/Multi-Image Tracking.unity

   m_Name: 
   m_EditorClassIdentifier: 
   m_PrefabsList:
-  - m_ImageGuid: f0340be5-710e-49ff-bc70-45f1315b9202
-    m_Prefab: {fileID: 6916502901855112170, guid: e22b43a8fcdab413bb4f52f5076f759e,
+  - imageGuid: f0340be5-710e-49ff-bc70-45f1315b9202
+    imagePrefab: {fileID: 6916502901855112170, guid: e22b43a8fcdab413bb4f52f5076f759e,
-  - m_ImageGuid: 2c29eeed-d95c-4111-b724-80f9ff10ce86
-    m_Prefab: {fileID: 2804028924010200506, guid: 379785de5e39005469c875710d3cc5a7,
+  - imageGuid: 2c29eeed-d95c-4111-b724-80f9ff10ce86
+    imagePrefab: {fileID: 2804028924010200506, guid: 379785de5e39005469c875710d3cc5a7,
-  - m_ImageGuid: aae75228-1973-4dc0-b7a2-53d1566ee402
-    m_Prefab: {fileID: 3279860958548870494, guid: 2584331523bd14e8898965d93034efdb,
+  - imageGuid: aae75228-1973-4dc0-b7a2-53d1566ee402
+    imagePrefab: {fileID: 3279860958548870494, guid: 2584331523bd14e8898965d93034efdb,
       type: 3}
   m_ImageLibrary: {fileID: 11400000, guid: c86e375d7e7430442a1104e88fa21f21, type: 2}
 --- !u!114 &264295717

Assets/Scenes/ImageTracking/Multi Prefab - Image Tracking/MultiTrackedImageInfoManager.cs

         struct NamedPrefab
         {
             // System.Guid isn't serializable, so we store the Guid as a string. At runtime, this is converted back to a System.Guid
-            [SerializeField]
-            string m_ImageGuid;
-            public string imageGuid => m_ImageGuid;
-
-            [SerializeField]
-            public GameObject m_Prefab;
+            public string imageGuid;
+            public GameObject imagePrefab;
-                m_ImageGuid = guid.ToString();
-                m_Prefab = prefab;
+                imageGuid = guid.ToString();
+                imagePrefab = prefab;
             }
         }
 
             m_PrefabsDictionary = new Dictionary<Guid, GameObject>();
             foreach (var entry in m_PrefabsList)
             {
-                m_PrefabsDictionary.Add(Guid.Parse(entry.imageGuid), entry.m_Prefab);
+                m_PrefabsDictionary.Add(Guid.Parse(entry.imageGuid), entry.imagePrefab);
             }
         }
 
             foreach (var trackedImage in eventArgs.added)
             {
                 // Give the initial image a reasonable default scale
-                var minLocalScalar = Mathf.Min(trackedImage.size.x, trackedImage.size.y);
-                trackedImage.transform.localScale = new Vector3(minLocalScalar / 2, minLocalScalar / 2, minLocalScalar / 2);
+                var minLocalScalar = Mathf.Min(trackedImage.size.x, trackedImage.size.y) / 2;
+                trackedImage.transform.localScale = new Vector3(minLocalScalar, minLocalScalar, minLocalScalar);
                 AssignOrShowPrefab(trackedImage);
             }
 

ProjectSettings/ProjectSettings.asset

     16:9: 1
     Others: 1
   bundleVersion: 0.1
-  preloadedAssets: []
+  preloadedAssets:
+  - {fileID: 4800000, guid: e7c77f6eaab324a819efdc13b8125a39, type: 3}
+  - {fileID: -7479341934665344595, guid: e2f869774b12e400996eb546603602e3, type: 2}
   metroInputSource: 0
   wsaTransparentSwapchain: 0
   m_HolographicPauseOnTrackingLoss: 1