Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Utilities/ObjectExtension.cs

@@ -0,0 +1,28 @@
+using UnityEngine;
+using UnityEditor;
+
+namespace UnityEditor.Timeline
+{
+    static class ObjectExtension
+    {
+        public static bool IsSceneObject(this Object obj)
+        {
+            if (obj == null)
+                return false;
+
+            bool isSceneType = obj is GameObject || obj is Component;
+            if (!isSceneType)
+                return false;
+
+            return !PrefabUtility.IsPartOfPrefabAsset(obj);
+        }
+
+        public static bool IsPrefab(this Object obj)
+        {
+            if (obj == null)
+                return false;
+
+            return PrefabUtility.IsPartOfPrefabAsset(obj);
+        }
+    }
+}