Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/UnityEditorInternals.cs

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+using System;
+using UnityEngine;
+using Object = UnityEngine.Object;
+
+namespace UnityEditor.Timeline
+{
+    static class UnityEditorInternals
+    {
+        public static Object DoObjectField(Rect position, Object obj, Type type, int controlId, bool allowScene)
+        {
+#if UNITY_2020_1_OR_NEWER
+            var newObject = EditorGUI.DoObjectField(position, position, controlId, obj, null, type, null, allowScene, EditorStyles.objectField);
+#else
+            var newObject = EditorGUI.DoObjectField(position, position, controlId, obj, type, null, null, allowScene, EditorStyles.objectField);
+#endif
+            return newObject;
+        }
+    }
+}