docs: @Override
  	public Response update(String CorpNum, int ItemCode, String MgtKey,
  			Statement statement) throws PopbillException {
  		if (MgtKey == null || MgtKey.isEmpty())
  			throw new PopbillException(-99999999, "관리번호가 입력되지 않았습니다.");
  				
  		return update(CorpNum, ItemCode, MgtKey, statement, null);
  	}