@Test
    void testParseOptionalPath() {
        DefLine l = new DefLine("anOptionalPath path optional");

        assertEquals("anOptionalPath", l.getName());
        assertNull(l.getDefault());
        assertTrue(l.isOptional());
        assertEquals("optionalPath", l.getType().getName());
    }
'file' parameters with default value is currently (2010-01-05) not allowed, but that might change in
the future, so the test is included to verify that value and name can be retrieved.
configgen/src/test/java/com/yahoo/config/codegen/DefLineParsingTest.java