Update

Assets/Third Parties/D.A. Assets/DA-Shared/Runtime/Tools/Scripts/Reflection/URIHelpersRef.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Reflection;
+using UnityEngine;
+
+namespace DA_Assets.Tools
+{
+    public class URIHelpersRef
+    {
+        private static Type _uriHelpersType;
+        private static MethodInfo _makeAssetUriMethod;
+
+        /// <summary>
+        /// https://github.com/Unity-Technologies/UnityCsReference/blob/b1c78d185a6f77aee1c1da32db971eaf1006f83e/Editor/Mono/UIElements/StyleSheets/URIHelpers.cs
+        /// </summary>
+        public static string MakeAssetUri(UnityEngine.Object asset)
+        {
+            if (asset == null) return null;
+            if (_uriHelpersType == null)
+            {
+                _uriHelpersType = Type.GetType("UnityEditor.UIElements.StyleSheets.URIHelpers, UnityEditor");
+            }
+
+            if (_uriHelpersType == null)
+            {
+                Debug.LogError("Failed to find the type URIHelpers. Ensure that you are using this code within the Unity Editor.");
+                return null;
+            }
+
+            if (_makeAssetUriMethod == null)
+            {
+                _makeAssetUriMethod = _uriHelpersType.GetMethod("MakeAssetUri", BindingFlags.Static | BindingFlags.Public, null, new Type[] { typeof(UnityEngine.Object) }, null);
+            }
+
+            if (_makeAssetUriMethod == null)
+            {
+                Debug.LogError("Failed to find the method MakeAssetUri. Check if the method is accessible.");
+                return null;
+            }
+
+            object result = _makeAssetUriMethod.Invoke(null, new object[] { asset });
+
+            string input = (string)result;
+
+            int index = input.IndexOf("?fileID=");
+            if (index >= 0)
+                input = input.Substring(0, index);
+
+            return input;
+        }
+    }
+}

Assets/Third Parties/D.A. Assets/DA-Shared/Runtime/Tools/Scripts/Reflection/URIHelpersRef.cs.meta

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+fileFormatVersion: 2
+guid: fa625f2ddef7c534aaf5c96034057f50
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: