protected void initialize(Node parent) {
   super.initialize(parent);
   this.directValueConverter = new MWNullConverter(this);
 }
 protected void addChildrenTo(List children) {
   super.addChildrenTo(children);
   children.add(this.directValueConverter);
 }
 protected void initializeFromMWConverterMapping(MWConverterMapping converterMapping) {
   super.initializeFromMWConverterMapping(converterMapping);
   this.setDirectValueConverter(converterMapping.getConverter());
 }