Adding debugging script; this should not be merged.

Author: david-lively

AppDomainTest.cs

@@ -0,0 +1,50 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEditor;
+using UnityEngine;
+using CesiumForUnity;
+
+public class AppDomainTest : MonoBehaviour
+{
+    [InitializeOnLoadMethod]
+    private static void Initialize()
+    {
+        AssemblyReloadEvents.afterAssemblyReload += OnAfterAssemblyReload;
+        AssemblyReloadEvents.beforeAssemblyReload += OnBeforeAssemblyReload;
+    }
+    
+    // void OnEnable()
+    // {
+    //     Debug.Log($"Adding event handlers");
+    //     AssemblyReloadEvents.afterAssemblyReload += OnAfterAssemblyReload;
+    //     AssemblyReloadEvents.beforeAssemblyReload += OnBeforeAssemblyReload;
+    // }
+    //
+    // void OnDisable()
+    // {
+    //     Debug.Log("Removing event handlers");
+    //     AssemblyReloadEvents.afterAssemblyReload -= OnAfterAssemblyReload;
+    //     AssemblyReloadEvents.beforeAssemblyReload -= OnBeforeAssemblyReload;
+    // }
+
+    private static void OnBeforeAssemblyReload()
+    {
+        Debug.Log("BEFORE assembly reload");
+
+        var tilesets = Object.FindObjectsByType<Cesium3DTileset>(FindObjectsSortMode.None);
+        
+        Debug.Log($"Found {tilesets.Length} tilesets");
+        
+        foreach (var ts in tilesets)
+        {
+            ts.WaitUntilIdle();
+        }
+        
+        Debug.Log("Done");
+    }
+
+    private static void OnAfterAssemblyReload()
+    {
+        Debug.Log("After assembly reload");
+    }
+}