code: public void addProcessor(String nodeName, NodeProcessor processor)
  	{
  		if (null == processor)
  		{
  			throw new IllegalArgumentException("Processor should not be null.");
  		}
  		if (IS_EMPTY.test(nodeName))
  		{
  			throw new IllegalArgumentException("The node name should not be empty.");
  		}
  		getActionPool().put(nodeName, processor);
  	}
docs: Add a specific processing that will be applied to nodes having the matching name.
  
  @param nodeName
  the name of nodes that will be processed.
  @param processor
  the processor.