Method subSet

corpus/java/training/guava/collect/Maps.java:3758–3762

(
        K fromElement, boolean fromInclusive, K toElement, boolean toInclusive)

    }

    @Override
    public NavigableSet<K> subSet(
        K fromElement, boolean fromInclusive, K toElement, boolean toInclusive) {
      return map().subMap(fromElement, fromInclusive, toElement, toInclusive).navigableKeySet();
    }

    @Override
    public NavigableSet<K> headSet(K toElement, boolean inclusive) {