template <typename T>
inline std::function<Any()> feature_count_auto_init(T& lhs)
{
//    REQUIRE(lhs != nullptr, "test");

	return [&]() {
//		if (lhs->get_feature_class() >= EFeatureClass::C_STREAMING_DENSE &&
//		    lhs->get_feature_class() <= EFeatureClass::C_STREAMING_VW)
//            REQUIRE(lhs != nullptr, "lambda test");
            return make_any(lhs.get_num_vectors());
//			    1.0 / static_cast<double>(
//			              ((CDotFeatures*)lhs)->get_dim_feature_space()));
//		else
//			return make_any(
//			    1.0 / (static_cast<double>(
//			               ((CDotFeatures*)lhs)->get_dim_feature_space()) *
//			           ((CDenseFeatures<float64_t>*)(lhs))
//			               ->std(false)
//			               .get_element(0)));
	};
}