@Test
    public void shouldRemoveAccessorAndReturnEmpty() {
        final Optional<Object[]> kvs = ElementHelper.remove(T.id, T.id, "this");
        assertEquals(Optional.empty(), kvs);
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/util/ElementHelperTest.java