@Test public void labels_01() {

    Graph graph = GraphFactory.createGraphMem();
    //LabelToNode.createUseLabelEncoded() ;
    
    builder()
        .labelToNode(LabelToNode.createUseLabelAsGiven())
        .parse(graph);
    assertEquals(1, graph.size());
    StringWriter sw = new StringWriter();
    RDFDataMgr.write(sw, graph, Lang.NT);
    String s = sw.toString();
    assertTrue(s.contains("_:Bb"));
}