Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Attributes/MenuEntryAttribute.cs

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+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace UnityEditor.Timeline
+{
+    /// <summary>
+    /// Used to indicate path and priority of classes that are auto added to the menu
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]
+    internal class MenuEntryAttribute : Attribute
+    {
+        public readonly int priority;
+        public readonly string name;
+        public readonly string subMenuPath;
+
+        public MenuEntryAttribute(string path, int priority)
+        {
+            path = path ?? string.Empty;
+            path = L10n.Tr(path);
+            this.priority = priority;
+
+            int index = path.LastIndexOf('/');
+            if (index >= 0)
+            {
+                name = (index == path.Length - 1) ? string.Empty : path.Substring(index + 1);
+                subMenuPath = path.Substring(0, index + 1);
+            }
+            else
+            {
+                name = path;
+                subMenuPath = string.Empty;
+            }
+        }
+    }
+}