//TODO: might be a command
 public void AddNominalTrait()
 {
     var trait = new NominalTrait() {Name = "New Nominal Trait"};
     context.Traits.Add(trait);
     Traits.Add(WrapTraitIntoModel(trait, context));
 }
 public NominalTraitViewModel(NominalTrait trait) {
     Trait = trait;
 }