@Override
    public <V> Property<V> property(final String key, final V value) {
        throw Element.Exceptions.propertyAdditionNotSupported();
    }
@author Stephen Mallette (http://stephen.genoprime.com)
@author Marko A. Rodriguez (http://markorodriguez.com)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/util/detached/DetachedElement.java