code: public <T extends AbstractJaxb> void removeCssClass(String clazz) {
          List<String> classList = this.getCssClass();
          if (classList != null) {
              for (ListIterator<String> i = classList.listIterator(); i.hasNext();) {
                  if (i.next().equals(clazz)) {
                      i.remove();
                  }
              }
          }
      }
docs: <p>
  remove specified class attribute if having it.
  </p>