code: @SuppressWarnings("unchecked")
    public static <E extends Comparable<? super E>> ImmutableSortedMultiset<E> of(
        E e1, E e2, E e3, E e4, E e5, E e6, E... remaining) {
      int size = remaining.length + 6;
      List<E> all = Lists.newArrayListWithCapacity(size);
      Collections.addAll(all, e1, e2, e3, e4, e5, e6);
      Collections.addAll(all, remaining);
      return copyOf(Ordering.natural(), all);
    }
docs: Returns an immutable sorted multiset containing the given elements sorted by their natural
  ordering.
  
  @throws NullPointerException if any element is null