docs: private List<double[]> calculateStdMeasurementsForParam(
              int            numEntriesPerPreview,
              int            numParamValues,
              int            paramValue,
              List<double[]> meanParamMeasurements)
      {
          List<double[]> paramMeasurementsSquaredDiffSum = 
                  new ArrayList<double[]>(numEntriesPerPreview);
          List<double[]> paramMeasurementsStd            = 
                  new ArrayList<double[]>(numEntriesPerPreview);
          
          int numCompleteFolds = 0;
          
          // sum up squared differences between measurements and mean values
          for (PreviewCollection<Preview> foldPreview : 
               this.origMultiRunPreviews.subPreviews) 
          {
              // check if there is a preview for each parameter value
              if (foldPreview.getPreviews().size() == numParamValues) {
                  numCompleteFolds++;
                  
                  Preview foldParamPreview = 
                          foldPreview.getPreviews().get(paramValue);
                  
                  // add this Preview's standardDeviations to the overall sum
                  this.addPreviewMeasurementSquaredDiffsToSum(
                          meanParamMeasurements, 
                          paramMeasurementsSquaredDiffSum,
                          foldParamPreview, 
                          numEntriesPerPreview);
              }
          }
          
          // divide sum by number of folds and take square root 
          for (int entryIdx = 0; entryIdx < numEntriesPerPreview; entryIdx++) {
              double[] sumEntry = paramMeasurementsSquaredDiffSum.get(entryIdx);
              double[] stdEntry = new double[sumEntry.length];
              
              // first measurement is used for indexing -> simply copy
              stdEntry[0] = sumEntry[0];
              
              // calculate standard deviation for remaining measurements
              for (int m = 1; m < sumEntry.length; m++) {
                  if (numCompleteFolds > 1) {
                      stdEntry[m] = Math.sqrt(sumEntry[m]/(numCompleteFolds-1));
                  }
                  else {
                      stdEntry[m] = Math.sqrt(sumEntry[m]);
                  }
              }
              
              paramMeasurementsStd.add(stdEntry);
          }
          
          return paramMeasurementsStd;
      }