public void addFactModelToStackPanel(final FactMetaModel factMetaModel) {
    final FactModelEditor editor =
        new FactModelEditor(factMetaModel, superTypeFactModels, modelNameHelper);

    editor.setMoveDownCommand(getMoveDownCommand(factMetaModel));

    editor.setMoveUpCommand(getMoveUpCommand(factMetaModel));

    editor.setDeleteEvent(getDeleteCommand(factMetaModel));

    factModelsPanel.add(
        editor,
        new LoadContentCommand() {
          public Widget load() {
            return editor.getContent();
          }
        });

    renderEditorArrows();
  }