docs: public String describeAttribute(String attributeName) {
          String ret = "Attribute not found";
          try {
              MBeanAttributeInfo[] attributes = beanInfo.getAttributes();
              for (MBeanAttributeInfo attribute : attributes) {
                  if (attribute.getName().equals(attributeName)) {
                      return describeAttribute(attribute);
                  }
              }
          } catch (Exception e) {
              throwException("Could not describe attribute '" + attributeName + "'. Reason: ", e);
          }
          return ret;
      }