docs: public static Collection<IteratorSetting> getMetricIterators(AccumuloTable table)
      {
          String cardQualifier = new String(CARDINALITY_CQ);
          String rowsFamily = new String(METRICS_TABLE_ROWS_CF.array());
  
          // Build a string for all columns where the summing combiner should be applied,
          // i.e. all indexed columns
          StringBuilder cardBuilder = new StringBuilder(rowsFamily + ":" + cardQualifier + ",");
          for (String s : getLocalityGroups(table).keySet()) {
              cardBuilder.append(s).append(":").append(cardQualifier).append(',');
          }
          cardBuilder.deleteCharAt(cardBuilder.length() - 1);
  
          // Configuration rows for the Min/Max combiners
          String firstRowColumn = rowsFamily + ":" + new String(METRICS_TABLE_FIRST_ROW_CQ.array());
          String lastRowColumn = rowsFamily + ":" + new String(METRICS_TABLE_LAST_ROW_CQ.array());
  
          // Summing combiner for cardinality columns
          IteratorSetting s1 = new IteratorSetting(1, SummingCombiner.class, ImmutableMap.of("columns", cardBuilder.toString(), "type", "STRING"));
  
          // Min/Max combiner for the first/last rows of the table
          IteratorSetting s2 = new IteratorSetting(2, MinByteArrayCombiner.class, ImmutableMap.of("columns", firstRowColumn));
          IteratorSetting s3 = new IteratorSetting(3, MaxByteArrayCombiner.class, ImmutableMap.of("columns", lastRowColumn));
  
          return ImmutableList.of(s1, s2, s3);
      }