private void addEmptyItem(CollectionListModel<? super LookupElement> model) {
    LookupElement item = new EmptyLookupItem(myCalculating ? " " : LangBundle.message("completion.no.suggestions"), false);
    model.add(item);

    cellRenderer.itemAdded(item, LookupElementPresentation.renderElement(item));
    requestResize();
  }
private void addEmptyItem(CollectionListModel<? super LookupElement> model)