private static void CreateTool()
        {
            var menu = new GenericMenu();
            var icon = Resources.Load <Texture>($"{EditorResources.IconsPath}/ToolbarSceneLoader");

            Tool = new ToolbaPopup(menu, "Scenes", icon);

            ToolbarTools.AddTool(Tool, ToolbarSide.Left);
        }
 static ToolbarSceneLoader()
 {
     Tool = null;
 }