code: public boolean isEmbeddable(Class embeddableClazz)
      {
          return embeddables != null ? embeddables.containsKey(embeddableClazz)
                  && embeddables.get(embeddableClazz).getPersistenceType().equals(PersistenceType.EMBEDDABLE) : false;
      }
docs: Returns true, if attribute is embeddable.
  
  @param embeddableClazz
  class for embeddable type attribute.
  @return try, if paramterized class is of embeddable java type.