docs: static <T> VarOptItemsSketch<T> newInstanceFromUnionResult(final ArrayList<T> dataList,
                                                               final ArrayList<Double> weightList,
                                                               final int k,
                                                               final long n,
                                                               final int hCount,
                                                               final int rCount,
                                                               final double totalWtR) {
      final VarOptItemsSketch<T> sketch =  new VarOptItemsSketch<>(dataList, weightList, k, n,
              dataList.size(), DEFAULT_RESIZE_FACTOR, hCount, rCount, totalWtR);
      sketch.convertToHeap();
      return sketch;
    }