@SuppressWarnings("unchecked")
  public static <E extends Comparable<? super E>> ImmutableSortedMultiset<E> of(E e1, E e2) {
    return copyOf(Ordering.natural(), Arrays.asList(e1, e2));
  }
@SuppressWarnings("unchecked")
  public static <E extends Comparable<? super E>> ImmutableSortedMultiset<E> of(E e1, E e2) {
    return copyOf(Ordering.natural(), Arrays.asList(e1, e2));
  }
@ SuppressWarnings ( "unchecked" ) public static < E extends Comparable < ? super E > > ImmutableSortedMultiset < E > of ( E e1 , E e2 ) { return copyOf ( Ordering . natural ( ) , Arrays . asList ( e1 , e2 ) ) ; }
Returns an immutable sorted multiset containing the given elements sorted by their natural
ordering.

@throws NullPointerException if any element is null
Returns an immutable sorted multiset containing the given elements sorted by their natural ordering .