code: public static <E> LinkedHashSet<E> newLinkedHashSet(Iterable<? extends E> elements) {
      if (elements instanceof Collection) {
        return new LinkedHashSet<E>(Collections2.cast(elements));
      }
      LinkedHashSet<E> set = newLinkedHashSet();
      Iterables.addAll(set, elements);
      return set;
    }
docs: Creates a <i>mutable</i> {@code LinkedHashSet} instance containing the given elements in order.
  
  <p><b>Note:</b> if mutability is not required and the elements are non-null, use {@link
  ImmutableSet#copyOf(Iterable)} instead.
  
  <p><b>Note for Java 7 and later:</b> if {@code elements} is a {@link Collection}, you don't
  need this method. Instead, use the {@code LinkedHashSet} constructor directly, taking advantage
  of the new <a href="http://goo.gl/iz2Wi">"diamond" syntax</a>.
  
  <p>Overall, this method is not very useful and will likely be deprecated in the future.
  
  @param elements the elements that the set should contain, in order
  @return a new {@code LinkedHashSet} containing those elements (minus duplicates)