docs: static void mergeUpdate(HashMappedList rowSet, Row row, Object[] newData,
                              int[] cols) {
  
          Object[] data = (Object[]) rowSet.get(row);
  
          if (data != null) {
              for (int j = 0; j < cols.length; j++) {
                  data[cols[j]] = newData[cols[j]];
              }
          } else {
              rowSet.add(row, newData);
          }
      }