@ApiStatus.ScheduledForRemoval
  @Deprecated
  @Contract(pure = true)
  public static @NotNull <T> HashSet<T> newHashSet(@NotNull Collection<? extends T> iterable) {
    Logger.getInstance(ContainerUtil.class).error("use HashSet#HashSet(Collection) instead");
    return new HashSet<>(iterable);
  }
@ApiStatus.ScheduledForRemoval
  @Deprecated
  @Contract(pure = true)
  public static @NotNull <T> HashSet<T> newHashSet(@NotNull Collection<? extends T> iterable)