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Runtime/UTSHelpURLAttribute.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+using UnityEngine.Rendering;
+using UnityEngine.Experimental.Rendering;
+using UnityObject = UnityEngine.Object;
+namespace Unity.Rendering.Toon
+{
+#if UNITY_2021_1_OR_NEWER
+    internal class UTSHelpURLAttribute : HelpURLAttribute
+    {
+        internal const string fallbackVersion = "0.7";
+
+        internal static string version
+        {
+            get
+            {
+                return fallbackVersion;
+            }
+        }
+        const string url = "https://docs.unity3d.com/Packages/{0}@{1}/manual/{2}.html";
+
+        internal UTSHelpURLAttribute(string pageName, string packageName = "com.unity.toonshader")
+            : base(GetPageLink(packageName, pageName))
+        {
+        }
+
+        internal static string GetPageLink(string packageName, string pageName) => string.Format(url, packageName, version, pageName);
+
+    }
+#else
+    internal class UTSHelpURLAttribute : System.Attribute 
+    {
+        internal UTSHelpURLAttribute(string name)  
+        {
+        }
+    }
+#endif
+}