Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Window/Modes/TimelineAssetEditionMode.cs

@@ -0,0 +1,27 @@
+namespace UnityEditor.Timeline
+{
+    class TimelineAssetEditionMode : TimelineInactiveMode
+    {
+        public override TimelineModeGUIState TrackState(WindowState state)
+        {
+            return TimelineModeGUIState.Enabled;
+        }
+
+        public TimelineAssetEditionMode()
+        {
+            headerState = new HeaderState
+            {
+                breadCrumb = TimelineModeGUIState.Enabled,
+                options = TimelineModeGUIState.Enabled,
+                sequenceSelector = TimelineModeGUIState.Enabled
+            };
+
+            trackOptionsState = new TrackOptionsState
+            {
+                newButton = TimelineModeGUIState.Enabled,
+                editAsAssetButton = TimelineModeGUIState.Enabled
+            };
+            mode = TimelineModes.AssetEdition;
+        }
+    }
+}