public Node parse() throws ScanException {
        return E();
    }
@Test
    public void testOptions1() throws Exception {
        Parser<Object> p = new Parser<>("%45x{a, b}");
        Node t = p.parse();
        SimpleKeywordNode witness = new SimpleKeywordNode("x");
        witness.setFormatInfo(new FormatInfo(45, Integer.MAX_VALUE));
        List<String> ol = new ArrayList<String>();
        ol.add("a");
        ol.add("b");
        witness.setOptions(ol);
        Assertions.assertEquals(witness, t);
    }