@Override
        public Traversal<Vertex, Vertex> get_g_VX1X_filterXage_gt_30X(final Object v1Id) {
            return g.V(v1Id).filter(v -> v.get().<Integer>property("age").orElse(0) > 30);
        }
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