Method headMap

src/main/java/org/mapdb/BTreeMapJava.java:974–980

(K toKey,
                                   boolean inclusive)

        }

        @Override
        public SubMap<K,V> headMap(K toKey,
                                   boolean inclusive) {
            if (toKey == null)
                throw new NullPointerException();
            return newSubMap(null, false, toKey, inclusive);
        }

        @Override
        public SubMap<K,V> tailMap(K fromKey,