Can you guys please help me with Room database question? The MailEntity class have a 1/Many relationship with AttachedEntity so I want to retrieve a MailEntity Item with the list of its AttachedEntity items. I found a guide to do that by creating a MailAndAttachedEntity item but the main problem here is to move that along data, domain and presentation layers. Should I deconstruct that into Correo and Attached items inside the domain layer mapper or should I create a MailAndAttached class for domain layer and the class MailAndAttachedView for the presentation one? Thanks in advanced!