@Test
    public void shouldNotFindTheLabelValue() {
        assertFalse(ElementHelper.getLabelValue("test", 321, "xyz", "friend", "testagain", "that").isPresent());
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/util/ElementHelperTest.java