@Test
    public void shouldNotIdentifyHiddenKeyExists() {
        assertThat(ElementHelper.keyExists(Graph.Hidden.hide("k"), "a", "b", "c", "k"), is(false));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/util/ElementHelperTest.java