}

    /**
     * @throws Exception
     */
    @Test
    public void testFromRootPackage_FileSystem() throws Exception {
        final Traverser[] traversers = TraversalUtil.getTraversers("org.codelibs.core.io.xxx");
        assertThat(traversers, is(notNullValue()));
        assertThat(traversers.length, is(1));

        final Traverser traverser = traversers[0];

     */
    public static Traverser getTraverser(final String rootDir) {
        assertArgumentNotEmpty("rootDir", rootDir);

        final URL url = ResourceUtil.getResource(rootDir.endsWith("/") ? rootDir : rootDir + '/');
        return getTraverser(url, null, rootDir);
    }

    /**