Function SetTimestamps

catboost/libs/data/loader.cpp:245–263

    }

    void SetTimestamps(
        const TPathWithScheme& timestampsPath,
        ui32 objectCount,
        TDatasetSubset loadSubset,
        IDatasetVisitor* visitor
    ) {
        DumpMemUsage("After data read");
        if (timestampsPath.Inited()) {
            auto maybeGroupIds = visitor->GetGroupIds();
            CB_ENSURE(maybeGroupIds, "Cannot load group timestamps for a dataset without groups");
            TVector<ui64> groupTimestamps = ReadGroupTimestamps(
                timestampsPath,
                *maybeGroupIds,
                objectCount,
                loadSubset
            );
            visitor->SetTimestamps(std::move(groupTimestamps));
        }
    }

    TVector<TString> LoadFeatureNames(const TPathWithScheme& featureNamesPath) {
        TVector<TString> featureNames;