@Override
        public Traversal<Vertex, Vertex> get_g_V_hasLabelXpersonX_propertyXname_nullX() {
            return g.V().hasLabel("person").property("name", null);
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/AddVertexTest.java