@SuppressWarnings("unchecked")
public class BTreePersistentIndexedCache<K, V> {
    private static final Logger LOGGER = LoggerFactory.getLogger(BTreePersistentIndexedCache.class);
    private final File cacheFile;
    private final KeyHasher<K> keyHasher;
    private final Serializer<V> serializer;
    private final short maxChildIndexEntries;
    private final int minIndexChildNodes;
    private final StateCheckBlockStore store;
    private HeaderBlock header;