@Test
    public void shouldHandleTraversalExplanation() throws Exception  {
        final TraversalExplanation te = __().out().outV().outE().explain();
        assertEquals(te.toString(), serializeDeserialize(te, TraversalExplanation.class).toString());
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/structure/io/gryo/GryoMapperTest.java