code: public void addDefaultProcessor(NodeProcessor processor)
  	{
  		if (null == processor)
  		{
  			throw new IllegalArgumentException("Processor should not be null.");
  		}
  		getActionPool().put(NODE_NAME__DEFAULT, processor);
  	}
docs: Add a default processing that will be applied when no specific processor is found.
  
  @param processor
  the default processor.