docs: public final Long getJmsDeliveryTime() {
          if (getHdr2().getChoiceField(JsHdr2Access.JMSDELIVERYTIME) == JsHdr2Access.IS_JMSDELIVERYTIME_EMPTY) {
              return Long.valueOf(getDerivedJmsDeliveryTime());
          }
          else {
              return (Long) getHdr2().getField(JsHdr2Access.JMSDELIVERYTIME_DATA);
          }
      }