+
+ data()->addAttribute(INDEX_ENTITY_A(), ModelAPI_AttributeInteger::typeId());
+ ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), INDEX_ENTITY_A());
+
+ data()->addAttribute(INDEX_ENTITY_B(), ModelAPI_AttributeInteger::typeId());
+ ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), INDEX_ENTITY_B());