public NavigableMap<K, V> headMap(K to, boolean inclusive) {Bound toBound = inclusive ? INCLUSIVE : EXCLUSIVE;return subMap(null, NO_BOUND, to, toBound);}
public java.util.NavigableMap<K, V> headMap(K to, bool inclusive){java.util.TreeMap.Bound toBound = inclusive ? java.util.TreeMap.Bound.INCLUSIVE :java.util.TreeMap.Bound.EXCLUSIVE;return this.subMap(default(K), java.util.TreeMap.Bound.NO_BOUND, to, toBound);}