* Copies all the elements from this fluent iterable to {@code collection}. This is equivalent to
   * calling {@code Iterables.addAll(collection, this)}.
   *
   * <p><b>{@code Stream} equivalent:</b> {@code stream.forEachOrdered(collection::add)} or {@code
   * stream.forEach(collection::add)}.
   *
   * @param collection the collection to copy elements to
   * @return {@code collection}, for convenience
   * @since 14.0
   */