Method headMap

corpus/java/training/guava/collect/Maps.java:4095–4098

(K toKey, boolean inclusive)

    }

    @Override
    public NavigableMap<K, V> headMap(K toKey, boolean inclusive) {
      return forward().tailMap(toKey, inclusive).descendingMap();
    }

    @Override
    public NavigableMap<K, V> tailMap(K fromKey, boolean inclusive) {