code: public IIsotope[] getIsotopes() {
          List<IIsotope> list = new ArrayList<IIsotope>();
          for (List<IIsotope> isotopes : this.isotopes) {
              if (isotopes == null) continue;
              for (IIsotope isotope : isotopes) {
                  list.add(clone(isotope));
              }
          }
          return list.toArray(new IIsotope[list.size()]);
      }
docs: Gets a array of all isotopes known to the IsotopeFactory.
  
  @return         An array of all isotopes