Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Runtime/Scripting/PlayableTrack.cs

@@ -0,0 +1,23 @@
+using System;
+using UnityEngine;
+using UnityEngine.Playables;
+
+namespace UnityEngine.Timeline
+{
+    /// <summary>
+    /// A PlayableTrack is a track whose clips are custom playables.
+    /// </summary>
+    /// <remarks>
+    /// This is a track that can contain PlayableAssets that are found in the project and do not have their own specified track type.
+    /// </remarks>
+    [Serializable]
+    public class PlayableTrack : TrackAsset
+    {
+        /// <inheritdoc />
+        protected override void OnCreateClip(TimelineClip clip)
+        {
+            if (clip.asset != null)
+                clip.displayName = clip.asset.GetType().Name;
+        }
+    }
+}