Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Signals/SignalReceiverHeader.cs

@@ -0,0 +1,15 @@
+using UnityEditor.IMGUI.Controls;
+using UnityEngine;
+
+namespace UnityEditor.Timeline.Signals
+{
+    class SignalReceiverHeader : MultiColumnHeader
+    {
+        public SignalReceiverHeader(MultiColumnHeaderState state) : base(state) {}
+
+        protected override void AddColumnHeaderContextMenuItems(GenericMenu menu)
+        {
+            menu.AddItem(EditorGUIUtility.TrTextContent("Resize to Fit"), false, ResizeToFit);
+        }
+    }
+}