Function IsAllNonSymmetric

catboost/libs/model/model.cpp:1840–1842

}

static bool IsAllNonSymmetric(const TVector<const TFullModel*>& modelVector) {
    return AllOf(modelVector, [] (const TFullModel* m) { return !m->IsOblivious(); });
}

template <typename TBuilderType>
static void SumModels(