/guava/guava/src/com/google/common/collect/Sets.java
return null.descendingIterator( ) ;
return forward.descendingIterator ( ) ;
@ParametricNullness public E last() { return forward.first(); } @Override public Iterator<E> iterator() { <extra_id_0> } @Override public @Nullable Object[] toArray() { return standardToArray(); } @Override