@Override
    public NavigableMap<K, V> headMap(K toKey, boolean inclusive)
    {
        Entry<K, V> to = entry(toKey, null);
        return new BinaryMap<>(entrySet.headSet(to, inclusive), comparator);
    }
@ Override public NavigableMap < K , V > headMap ( K toKey , boolean inclusive ) { Entry < K , V > to = entry ( toKey , null ) ; return new BinaryMap < > ( entrySet . headSet ( to , inclusive ) , comparator ) ; }
{@inheritDoc}
@param toKey
@param inclusive
@return