@Override
    public <V> VertexProperty<V> property(final String key, final V value, final Object... keyValues) {
        throw Element.Exceptions.propertyAdditionNotSupported();
    }
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/util/reference/ReferenceVertex.java