/**
   * Set up environment.
   *
   * @throws Exception exception
   */
  public void setUp() throws Exception {
    Helper.clearNamespace();
    Helper.initNamespace();

    freeTextGraphNode = new GraphNode();
    freeTextGraphNode.setContainer(new GraphElement() {});
  }
 /**
  * Tear down.
  *
  * @throws Exception exception
  */
 public void tearDown() throws Exception {
   Helper.clearNamespace();
 }