@Deprecated
  @SafeVarargs
  public static @Unmodifiable @NotNull <T> Set<T> set(T @NotNull ... items) {
    //noinspection SSBasedInspection
    return new HashSet<>(Arrays.asList(items));
  }
@Deprecated
  @SafeVarargs
  public static @Unmodifiable @NotNull <T> Set<T> set(T @NotNull ... items)