/** {@inheritDoc} */
  @Override
  public boolean canBeRemoved(String strId) {
    if (strId == null) {
      return true;
    }

    List<Directory> listForms =
        DirectoryHome.getDirectoryList(
            new DirectoryFilter(), PluginService.getPlugin(DirectoryPlugin.PLUGIN_NAME));

    for (Directory form : listForms) {
      if ((form.getWorkgroup() != null) && form.getWorkgroup().equals(strId)) {
        return false;
      }
    }

    return true;
  }