code: public <T extends AbstractJaxb> boolean hasCssClass(String clazz) {
          boolean result = false;
          List<String> classList = this.getCssClass();
          if (classList != null && classList.contains(clazz)) {
              result = true;
          }
          return result;
      }
docs: <p>
  return true if have specified class attribute.
  </p>
  
  @param clazz
  class attribute
  @return