@Override
  @NotNull
  public ActionPresentation getPresentation() {
    return new ActionPresentationData(PropertiesBundle.message("structure.view.group.by.prefixes.action.name"),
                                      PropertiesBundle.message("structure.view.group.by.prefixes.action.description"),
                                      AllIcons.Actions.GroupByPrefix);
  }
@Override
  @NotNull
  public ActionPresentation getPresentation()