public MutableSortedMap<K, V> asUnmodifiable() {
synchronized (this.lock) {
return UnmodifiableTreeMap.of(this);
}
}
@Override
public MutableSortedMap<K, V> tailMap(K fromKey) {
return UnmodifiableTreeMap.of(this.getMutableSortedMap().tailMap(fromKey));
}
@Override
public MutableSortedMap<K, V> subMap(K fromKey, K toKey) {
return UnmodifiableTreeMap.of(this.getMutableSortedMap().subMap(fromKey, toKey));
}
@Override
public MutableSortedMap<K, V> headMap(K toKey) {
return UnmodifiableTreeMap.of(this.getMutableSortedMap().headMap(toKey));
}