@Test
    public void shouldSupportAnonymousTraversals() {
        final String toString = __.out("knows").in("created").explain().toString();
        assertTrue(toString.contains("Traversal Explanation"));
        assertTrue(toString.contains("Original Traversal"));
        assertTrue(toString.contains("Final Traversal"));
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/process/traversal/util/TraversalExplanationTest.java