Method from

corpus/java/training/guava/collect/FluentIterable.java:130–139

Returns a fluent iterable that wraps iterable, or iterable itself if it is already a FluentIterable. Stream equivalent: iterable.stream() if iterable is a Collection; StreamSupport.stream(iterable.spliterator(), false) otherw

(final Iterable<E> iterable)

   * {@link Collection}; {@code StreamSupport.stream(iterable.spliterator(), false)} otherwise.
   */
  public static <E> FluentIterable<E> from(final Iterable<E> iterable) {
    return (iterable instanceof FluentIterable)
        ? (FluentIterable<E>) iterable
        : new FluentIterable<E>(iterable) {
          @Override
          public Iterator<E> iterator() {
            return iterable.iterator();
          }
        };
  }

  /**
   * Returns a fluent iterable containing {@code elements} in the specified order.