Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Runtime/Events/SignalTrack.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace UnityEngine.Timeline
+{
+    /// <summary>
+    /// Use this track to emit signals to a bound SignalReceiver.
+    /// </summary>
+    /// <remarks>
+    /// This track cannot contain clips.
+    /// </remarks>
+    /// <seealso cref="UnityEngine.Timeline.SignalEmitter"/>
+    /// <seealso cref="UnityEngine.Timeline.SignalReceiver"/>
+    /// <seealso cref="UnityEngine.Timeline.SignalAsset"/>
+    [Serializable]
+    [TrackBindingType(typeof(SignalReceiver))]
+    [TrackColor(0.25f, 0.25f, 0.25f)]
+    [ExcludeFromPreset]
+    public class SignalTrack : MarkerTrack {}
+}