protected override void CreateDefaultObjectSpaceProvider(CreateCustomObjectSpaceProviderEventArgs args)
        {
            args.ObjectSpaceProvider = new ???
        }

    public class MyObjectSpaceProvider : ObjectSpaceProvider
    {
        public MyObjectSpaceProvider(IXpoDataStoreProvider dataStoreProvider)
            : base(dataStoreProvider)
        {
        }

        protected override IObjectSpace CreateObjectSpaceCore(UnitOfWork unitOfWork, DevExpress.ExpressApp.DC.ITypesInfo typesInfo)
        {
            return base.CreateObjectSpaceCore(new MyUnitOfWork(unitOfWork.DataLayer), typesInfo);
        }
    }

    public class MyUnitOfWork : UnitOfWork
    {
        public MyUnitOfWork(IDataLayer layer, params IDisposable[] disposeOnDisconnect)
            : base(layer, disposeOnDisconnect)
        {
        }

        protected override MemberInfoCollection GetPropertiesListForUpdateInsert(object theObject, bool isUpdate)
        {
            var list = base.GetPropertiesListForUpdateInsert(theObject, isUpdate);

            for (int i = list.Count - 1; i >= 0; i--)
            {
                Func<Attribute, bool> customAttrWhere = x =>
                    x is CustomAttribute
                    && (x as CustomAttribute).Name == "AllowEdit"
                    && (x as CustomAttribute).Value == "false";

                var customAttr = list[i].Attributes.FirstOrDefault(customAttrWhere);

                if (customAttr != null)
                    list.RemoveAt(i);
            }

            return list;
        }
    }