Representer blocks parsing comments

The code below is from: src/test/java/org/yaml/snakeyaml/comment/EmitterWithCommentEnabledTest.java

With some minor changes.

@Test
public void testCommentsAtDataWindowBreak() {
    String data = getComplexConfig();   

    final DumperOptions yamlOptions = new DumperOptions();    
    final LoaderOptions loaderOptions = new LoaderOptions();    
    final Representer yamlRepresenter = new Representer();

    yamlOptions.setProcessComments(true);    
    yamlOptions.setIndent(4);    
    yamlOptions.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);

    yamlRepresenter.setDefaultFlowStyle(DumperOptions.FlowStyle.BLOCK);

    loaderOptions.setProcessComments(true);
    loaderOptions.setMaxAliasesForCollections(Integer.MAX_VALUE);    
    final Yaml yaml = new Yaml(new SafeConstructor(), yamlRepresenter, yamlOptions, loaderOptions);    

    System.out.println(yaml.dump(yaml.load(data)));
    // Output of this line: (file: output)
  }

The code below is from: src/main/java/org/yaml/snakeyaml/Yaml.java

public String dump(Object data) {
    List<Object> list = new ArrayList<Object>(1);    
    list.add(data);    
    return dumpAll(list.iterator());
}

private void dumpAll(Iterator<? extends Object> data, Writer output, Tag rootTag) {
    Serializer serializer = new Serializer(new Emitter(output, dumperOptions), resolver, dumperOptions, rootTag);    
    try {serializer.open();        
      while (data.hasNext()) {
            Node node = representer.represent(data.next());            
            serializer.serialize(node);        
      }
      serializer.close();    
    } catch (IOException e) {
        throw new YAMLException(e);    
    }
}

The problem is that the Representer is making new nodes, so the parsed comments are gone.

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