code: public Object getData(IDictToInstance dictConverter)
  	{
  		ObjectifyVisitor v = new ObjectifyVisitor(dictConverter);
  		this.accept(v);
  		return v.getObject();
  	}
docs: get the actual data as Java objects.
  @param dictConverter object to convert dicts to actual instances for a class,
  instead of leaving them as dictionaries. Requires the __class__ key to be present
  in the dict node. If it returns null, the normal processing is done.