code: private List<ClassReference> getClassReferences(String className)
      {
          List<ClassReference> ret = new ArrayList<ClassReference>();
          ClassReference cr = m_classReferenceMap.get(className);
          ret.addAll(cr.getChildren());
          return ret;
      }
docs: Figure out which classes extend the named class and return the current class and the extenders
  @param className
  @param engineMetadata
  @return list of class references