docs: public StringBuffer addXML(StringBuffer sbXML)
      {
          if (sbXML == null)
              sbXML = new StringBuffer();
          Util.addStartTag(sbXML, BaseMessage.HEADER_TAG).append(DBConstants.RETURN);
          Map<String,Object> map = this.getProperties();
          Util.addXMLMap(sbXML, map);
          Util.addEndTag(sbXML, BaseMessage.HEADER_TAG).append(DBConstants.RETURN);
          return sbXML;
      }