@Override
    public Variables variables() {
        throw new UnsupportedOperationException(String.format("RemoteGraph is a proxy to %s - this method is not supported", connection));
    }
This method returns an empty {@link Iterator} - it is not meant to be called directly.
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/structure/RemoteGraph.java