code: @Override
  	public HTCashbillSummary summary(String CorpNum, String JobID,
  			String[] TradeUsage, String[] TradeType) throws PopbillException {
  		return summary(CorpNum, JobID, TradeUsage, TradeType, null);
  	}
docs: /*
  (non-Javadoc)
  @see com.popbill.api.HTCashbillService#Summary(java.lang.String, java.lang.String, java.lang.String[], java.lang.String[])