code: public static <E> Funnel<Iterable<? extends E>> sequentialFunnel(Funnel<E> elementFunnel) {
      return new SequentialFunnel<E>(elementFunnel);
    }
docs: Returns a funnel that processes an {@code Iterable} by funneling its elements in iteration
  order with the specified funnel. No separators are added between the elements.
  
  @since 15.0