public ExtendedIterator<String> listModels() {
   return maker.listGraphs();
 }
 public void removeModel(String name) {
   maker.removeGraph(name);
 }
 public boolean hasModel(String name) {
   return maker.hasGraph(name);
 }
 public Model createFreshModel() {
   return makeModel(maker.createGraph());
 }
 public Model createDefaultModel() {
   return makeModel(maker.getGraph());
 }
 public Model createModel(String name, boolean strict) {
   return makeModel(maker.createGraph(name, strict));
 }
 public Model openModel(String name, boolean strict) {
   return makeModel(maker.openGraph(name, strict));
 }
 public Model openModelIfPresent(String name) {
   return maker.hasGraph(name) ? openModel(name) : null;
 }
 public Model openModel() {
   return new ModelCom(maker.openGraph());
 }
 public void close() {
   maker.close();
 }