feat: some application of source code generator

addons/AetherBind/SceneInstantiatorExtensions.cs

@@ -1,5 +1,6 @@
 using System;
 using Godot;
+using OwofGames.GodotLume;
 
 namespace GodotHostTest.AetherBind;
 
@@ -13,11 +14,11 @@ public static class SceneInstantiatorExtensions
     /// <param name="packedScene">The packed scene to instantiate.</param>
     /// <param name="onScopeCreated">
     ///     An optional callback invoked once the scope has been created, but before instantiating the
-    ///     scene.
+    ///     scene, with the provider as argument.
     /// </param>
     /// <returns>The created node, with its dependencies satisfied.</returns>
     private static T Instantiate<T>(this ISceneInstantiator sceneInstantiator, PackedScene packedScene,
-        Delegate? onScopeCreated = null) where T : Node
+        Action<IProvider>? onScopeCreated = null) where T : Node
     {
         return (T)sceneInstantiator.Instantiate(packedScene, onScopeCreated);
     }