message: test(models/typeguards): fix model to actually use the correct sub class
diff: @@ -15,7 +15,7 @@ export class IsRefType {
  @prop({ ref: IsRefTypeNestedString, type: String })
  public nestedString?: Ref<IsRefTypeNestedString>;
  - @prop({ ref: IsRefTypeNestedString })
  + @prop({ ref: IsRefTypeNestedObjectId })
  public nestedObjectId?: Ref<IsRefTypeNestedObjectId>;
  }
  