private static @Nullable ExpandableItemsHandlerFactory getInstance() {
    if (!LoadingState.COMPONENTS_REGISTERED.isOccurred() || !Registry.is("ide.windowSystem.showListItemsPopup", true)) {
      return null;
    }
    return ApplicationManager.getApplication().getService(ExpandableItemsHandlerFactory.class);
  }
private static @Nullable ExpandableItemsHandlerFactory getInstance()