Function HasDenseData

catboost/libs/data/objects.cpp:833–840

template <class T>
static bool HasDenseData(const TVector<THolder<T>>& columns) {
    for (const auto& columnPtr : columns) {
        if (columnPtr && !columnPtr->IsSparse()) {
            return true;
        }
    }
    return false;
}

template <class T>
static bool HasSparseData(const TVector<THolder<T>>& columns) {