code: public static Set<Class> findWrapperClasses() {
  
          final List<TypeToWrapper> localTypeToWrapperList = getTypeToWrapper();
  
          Set<Class> resultList = new HashSet<Class>();
  
          if (localTypeToWrapperList != null) {
              for (TypeToWrapper typeToWrapper : localTypeToWrapperList) {
                  resultList.add(typeToWrapper.getWrapperType());
              }
          }
  
          return resultList;
  
      }
docs: Gets a list with all wrapper classes.
  
  @return a list with all wrapper classes