@GwtCompatible(serializable = true)
  public <S extends T> Ordering<S> nullsLast() {
    return new NullsLastOrdering<S>(this);
  }
@GwtCompatible(serializable = true)
  public <S extends T> Ordering<S> nullsLast() {
    return new NullsLastOrdering<S>(this);
  }
@ GwtCompatible ( serializable = true ) public < S extends T > Ordering < S > nullsLast ( ) { return new NullsLastOrdering < S > ( this ) ; }
Ordering<String> o = Ordering.<String>natural().nullsLast();
Ordering<String > o = Ordering . <String > natural () . nullsLast () ;