Module.cs

using System.ComponentModel;
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.DC;
using DevExpress.Persistent.Base;
using DevExpress.ExpressApp.Model;
using DevExpress.ExpressApp.Actions;
using DevExpress.ExpressApp.Editors;
using DevExpress.ExpressApp.Updating;
using DevExpress.ExpressApp.Model.Core;
using DevExpress.ExpressApp.Model.DomainLogics;
using DevExpress.ExpressApp.Model.NodeGenerators;

namespace ComplexDialogEF.Module;

// For more typical usage scenarios, be sure to check out https://docs.devexpress.com/eXpressAppFramework/DevExpress.ExpressApp.ModuleBase.
public sealed class ComplexDialogEFModule : ModuleBase {
    public ComplexDialogEFModule() {
		// 
		// ComplexDialogEFModule
		// 
		RequiredModuleTypes.Add(typeof(DevExpress.ExpressApp.SystemModule.SystemModule));
    }
    public override IEnumerable<ModuleUpdater> GetModuleUpdaters(IObjectSpace objectSpace, Version versionFromDB) {
        ModuleUpdater updater = new DatabaseUpdate.Updater(objectSpace, versionFromDB);
        return new ModuleUpdater[] { updater };
    }
    public override void Setup(XafApplication application) {
        base.Setup(application);
        application.ObjectSpaceCreated += Application_ObjectSpaceCreated;
        // Manage various aspects of the application UI and behavior at the module level.
    }
    private void Application_ObjectSpaceCreated(object sender, ObjectSpaceCreatedEventArgs e) {
        CompositeObjectSpace compositeObjectSpace = e.ObjectSpace as CompositeObjectSpace;
        if (compositeObjectSpace != null) {
            if (!(compositeObjectSpace.Owner is CompositeObjectSpace)) {
                compositeObjectSpace.PopulateAdditionalObjectSpaces((XafApplication)sender);
            }
        }
    }
}