declaring the domain model

Before we start building out the elements of our domain, we want to declare the domain model as a type. We call it SimblDomainModel, and decorate it with a @domainModel annotation:

package simbl.domain

import longevity.model.annotations.domainModel

@domainModel trait SimblDomainModel

The @domainModel annotation does not do anything to our SimblDomainModel trait itself. Instead, it inserts some useful behind-the-scenes information into the SimblDomainModel companion object. The user manual has all the details of what goes on behind the scenes.