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

public void removePropertyEditorDecorator ( PropertyEditorDecorator d ) { if ( d == null ) { throw new IllegalArgumentException ( "d must not be null!" ) ; } editorDecorators . remove ( d ) ; }
remove the given decorator . if the decorator is already removed , does nothing .
