assertElementNotPresent("content"); assertElementPresent("_content");
assertElementPresent("content");
    public void testToggleNavigation() {        SiteTestHelper.assertNoException(getTester());        assertElementNotPresent("navigation");        assertElementNotPresent("content");        assertElementPresent("_content");        clickLink("toggleNavigation");        SiteTestHelper.assertNoException(getTester());        assertElementPresent("navigation");        assertElementPresent("content");        assertElementNotPresent("_content");                clickLink("toggleNavigation");        SiteTestHelper.assertNoException(getTester());        assertElementNotPresent("navigation");        assertElementNotPresent("content");        assertElementPresent("_content");    }