annDoe.husband().set( jackDoe );
PetEntity rex = uow.newEntity( PetEntity.class );
setName( rex, "Rex" );
rex.changeOwner( jackDoe );
rex.updateDescription( "Rex is a great dog" );
PetEntity kitty = uow.newEntity( PetEntity.class );
setName( kitty, "Kitty" );
kitty.changeOwner( annDoe );