code: public ItemProcessor<Chunk<T>> getOrCreateProcessor()
     {
        Node node = childNode.getOrCreate("processor");
        ItemProcessor<Chunk<T>> processor = new ItemProcessorImpl<Chunk<T>>(this, "processor", childNode, node);
        return processor;
     }
docs: If not already created, a new <code>processor</code> element with the given value will be created.
  Otherwise, the existing <code>processor</code> element will be returned.
  @return  a new or existing instance of <code>ItemProcessor<Chunk<T>></code>