code:     public void setDynamicAttribute(String uri, String localName, Object value) throws JspException {
          if (ComponentUtils.altSyntax(getStack()) && ComponentUtils.isExpression(value)) {
              dynamicAttributes.put(localName, String.valueOf(ObjectUtils.defaultIfNull(findValue(value.toString()), value)));
          } else {
              dynamicAttributes.put(localName, value);
          }
      }
  
  