@Test
    @LoadGraphWith(MODERN)
    public void shouldAllowIdsOfMixedTypes() {
        final List<Vertex> vertices = g.V().toList();
        assertEquals(2, g.V(vertices.get(0), vertices.get(1).id()).count().next().intValue());
        assertEquals(2, g.V(vertices.get(0).id(), vertices.get(1)).count().next().intValue());
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Pieter Martin
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/CoreTraversalTest.java