/guava/android/guava/src/com/google/common/collect/ForwardingNavigableSet.java
return Iterators.pollNext( descendingIterator( ) ) ;
return Iterators.pollNext ( iterator ( ) ) ;
@CheckForNull public E pollFirst() { return delegate().pollFirst(); } @CheckForNull protected E standardPollFirst() { <extra_id_0> } @Override @CheckForNull public E pollLast() { return delegate().pollLast(); }