Method headSet

corpus/java/training/guava/collect/Sets.java:1669–1672

(E toElement, boolean inclusive)

    }

    @Override
    public NavigableSet<E> headSet(E toElement, boolean inclusive) {
      return forward.tailSet(toElement, inclusive).descendingSet();
    }

    @Override
    public NavigableSet<E> tailSet(E fromElement, boolean inclusive) {