internal static IObservable <Unit> Connect(this ApplicationModulesManager manager)
=> manager.DefaultLookupPropertyEditor()
.Merge(manager.MarkupContentPropertyEditor())
.Merge(manager.CheckBlazor(typeof(BlazorStartup).FullName, typeof(BlazorModule).Namespace))
.Merge(manager.WhenApplication(application => application.UseCustomNestedFrameTemplate()
.Merge(application.ApplyDxDataGridModel())).ToUnit());