@Override
        public Traversal<Vertex, Map<String, Object>> get_g_V_outXcreatedX_aggregateXxX_byXlangX_groupCount_programXTestProgramX_asXaX_selectXa_xX() {
            return g.V().out("created").aggregate("x").by("lang").groupCount().program(new TestProgram()).as("a").select("a", "x");
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/ProgramTest.java