@Override
        public Traversal<Vertex, String> get_g_V_valuesXnameX_flatMapXsplitXaX() {
            return g.V().values("name").flatMap(s -> Stream.of(((String) s.get()).split("a")).iterator());
        }
Tests that cover lambda steps that are used in embedded cases.
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/LambdaStepTest.java