code: public RefundQuery refundQueryByRefundNumber(String refundNumber) {
          RefundQueryRequestWrapper refundQueryRequestWrapper = new RefundQueryRequestWrapper();
          refundQueryRequestWrapper.setRefundNumber(refundNumber);
          return refundQuery(refundQueryRequestWrapper);
      }
docs: 根据refundNumber查询退款记录
  @param refundNumber
  @return