Resolve WES-90 "Integrate signpredictor in courses"

Packages/com.unity.barracuda/Runtime/Core/Internals/NNModel.cs

@@ -0,0 +1,42 @@
+using System;
+using UnityEngine;
+
+namespace Unity.Barracuda
+{
+    /// <summary>
+    /// Barracuda Model asset
+    /// </summary>
+    public class NNModel : ScriptableObject
+    {
+        /// <summary>
+        /// Model data
+        /// </summary>
+        [HideInInspector]
+        public NNModelData modelData;
+
+        [NonSerialized]
+        Model m_Model;
+
+        [NonSerialized]
+        float m_LastLoaded;
+
+        internal Model GetDeserializedModel(bool verbose = false, bool skipWeights = true)
+        {
+            if (m_Model == null)
+            {
+                m_Model = ModelLoader.Load(this, verbose, skipWeights);
+                m_LastLoaded = Time.realtimeSinceStartup;
+            }
+
+            return m_Model;
+        }
+
+        void OnEnable()
+        {
+            // Used for detecting re-serialized models (e.g. adjusting import settings in the editor)
+            // Force a reload on next access
+            if (Time.realtimeSinceStartup >= m_LastLoaded)
+                m_Model = null;
+        }
+    }
+}