Yes, we recommend that the persistent objects are not used in all layers of the application but only in the data access layer and in the layer that contains the business logic and handles the reading / writing of persistent objects. This way you get stronger separation of concerns and if necessary you can replace more easily the different layers of the application.
The disadvantage at the moment is that you have to write manually the additional wrapper objects. We will provide an option for automatic generation of such objects in one of the future releases.
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