code: @Override
  	public String requestJob(String CorpNum, QueryType queryType, String SDate,
  			String EDate) throws PopbillException {
  		return requestJob(CorpNum, queryType, SDate, EDate, null);
  	}
docs: /*
  (non-Javadoc)
  @see com.popbill.api.HTCashbillService#requestJob(java.lang.String, com.popbill.api.hometaxcashbill.QueryType, java.lang.String, java.lang.String)