Method EstimateMemoryForCloning

catboost/libs/data/external_columns.cpp:200–213

        );
    }
    ui64 TExternalFloatSparseValuesHolder::EstimateMemoryForCloning(
        const TCloningParams& cloningParams
    ) const {
        const auto floatFeatureIdx = QuantizedFeaturesInfo->GetPerTypeFeatureIdx<EFeatureType::Float>(
            *this
        );
        CB_ENSURE_INTERNAL(cloningParams.InvertedSubsetIndexing.Defined(), "InvertedSubsetIndexing should be defined");
        return EstimateCpuRamLimitForCreateQuantizedSparseSubset<ui8>(
            **cloningParams.InvertedSubsetIndexing,
            SrcData.GetNonDefaultSize(),
            SrcData.GetIndexing()->GetType(),
            CalcHistogramWidthForBorders(QuantizedFeaturesInfo->GetBorders(floatFeatureIdx).size())
        );
    }

    THolder<IFeatureValuesHolder> TExternalFloatSparseValuesHolder::CloneWithNewSubsetIndexing(
        const TCloningParams& cloningParams,