in src/vector_of_kll.cpp [335:342]
auto vector_of_kll_sketches<T, C>::get_n() const -> Array1D<uint64_t> {
auto vals = make_ndarray<uint64_t>(d_);
auto view = vals.view();
for (uint32_t i = 0; i < d_; ++i) {
view(i) = sketches_[i].get_n();
}
return vals;
}