code: @Override
  	public Statement getDetailInfo(String CorpNum, int ItemCode, String MgtKey) throws PopbillException {
  		return getDetailInfo(CorpNum, ItemCode, MgtKey, null);
  	}
docs: /*
  (non-Javadoc)
  @see com.popbill.api.StatementService#getDetailInfo(java.lang.String, int, java.lang.String)