code: private List<IIsotope> orderList(List<IIsotope> isotopes_TO) {
          List<IIsotope> newOrderList = new ArrayList<IIsotope>();
          for (int i = 0; i < orderElements.length; i++) {
              String symbol = orderElements[i];
              Iterator<IIsotope> itIso = isotopes_TO.iterator();
              while (itIso.hasNext()) {
                  IIsotope isotopeToCo = itIso.next();
                  if (isotopeToCo.getSymbol().equals(symbol)) {
                      newOrderList.add(isotopeToCo);
                  }
              }
          }
          return newOrderList;
      }
docs: Put the order the List of IIsotope according the probability occurrence.
  
  @param isotopes_TO  The List of IIsotope
  @return             The list of IIsotope ordered