protected override void OnWindowEnable(VisualElement root)
        {
            m_SettingsTab = new SettingsTab();
            AddTab("Settings", m_SettingsTab);
            AddTab("About", new AboutTab());

            SetupSettingsTab(m_SettingsTab);
        }
 void SetupSettingsTab(SettingsTab settingsTab)
 {
     settingsTab.UpdateBuildEntitiesCallback += UpdateBuildEntities;
     UpdateBuildEntities();
 }