class MaterialDesignIcons {

  @NotNull
  @VisibleForTesting
  static Collection<String> getCategoriesFromFile(@NotNull File file) {
    String[] array = file.list();

    if (array == null) {
      return Collections.emptyList();
    }

    List<String> list = Arrays.asList(array);
    list.sort(String::compareTo);

    return list;
  }

  private  MaterialDesignIcons();

}