@Override
    protected byte[] getStorageObject(final CASValue<Object> casValue) throws ResourceIOException {
        return castAsByteArray(casValue.getValue());
    }
Create a storage backend using the given <i>memcached</i> client and
applying the given cache configuration, serialization, and hashing
mechanisms.

@param client           how to talk to <i>memcached</i>
@param config           apply HTTP cache-related options
@param serializer       alternative serialization mechanism
@param keyHashingScheme how to map higher-level logical "storage keys"
                        onto "cache keys" suitable for use with memcached
@since 5.2
httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/memcached/MemcachedHttpCacheStorage.java