docs: private Stream<Numeric> runComputeStd(GraqlCompute.Statistics.Value query) {
          Map<String, Double> stdTuple = runComputeStatistics(query);
          if (stdTuple == null)  return Stream.empty();
  
          double squareSum = stdTuple.get(StdMapReduce.SQUARE_SUM);
          double sum = stdTuple.get(StdMapReduce.SUM);
          double count = stdTuple.get(StdMapReduce.COUNT);
          Double std = Math.sqrt(squareSum / count - (sum / count) * (sum / count));
  
          return Stream.of(new Numeric(std));
      }