code: @Override
  	public ChargeInfo getChargeInfo(String CorpNum) throws PopbillException {
  		return httpget("/Cashbill/ChargeInfo", CorpNum, null, ChargeInfo.class);
  	}
docs: /*
  (non-Javadoc)
  @see com.popbill.api.CashbillService#getChargeInfo(java.lang.String)