@Test
    @FeatureRequirementSet(FeatureRequirementSet.Package.SIMPLE)
    public void shouldNotConstructNewWithSomethingAlreadyDetached() {
        final Vertex v = graph.addVertex();
        final VertexProperty vp = v.property(VertexProperty.Cardinality.single, "test", "this");
        final DetachedVertexProperty dvp = DetachedFactory.detach(vp, true);
        assertSame(dvp, DetachedFactory.detach(dvp, true));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/structure/util/detached/DetachedVertexPropertyTest.java