public void addPropertyEditorDecorator(PropertyEditorDecorator d){
  if (d == null) {
    throw new IllegalArgumentException("d must not be null!");
  }
  editorDecorators.add(d);
}

public void addPropertyEditorDecorator ( PropertyEditorDecorator d ) { if ( d == null ) { throw new IllegalArgumentException ( "d must not be null!" ) ; } editorDecorators . add ( d ) ; }
add the given decorator .
