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