Method GetCatFeature

catboost/libs/data/objects.h:480–482

can return nullptr if this feature is unavailable * (ignored or this data provider contains only subset of features) */

         * (ignored or this data provider contains only subset of features)
         */
        TMaybeData<const THashedCatValuesHolder*> GetCatFeature(ui32 catFeatureIdx) const {
            return MakeMaybeData<const THashedCatValuesHolder>(Data.CatFeatures[catFeatureIdx]);
        }

        void SetCatFeature(ui32 catFeatureIdx, THolder<THashedCatValuesHolder>&& newFeatureValues) {
            Data.CatFeatures[catFeatureIdx] = std::move(newFeatureValues);