Пример гоночки

Assets/Code/Infrastructure/UI/Panels/LoadingPanel.cs

@@ -1,13 +1,15 @@
+using System;
+
 namespace Code.Infrastructure.UI.Panels
 {
     public class LoadingPanel : UIPanel
     {
-        public override void Open()
+        public override void Open(Action callback = null)
         {
             
         }
 
-        public override void Close()
+        public override void Close(Action callback = null)
         {
             
         }