public function __construct(FactoryInterface $factory, Connection $conn, array $caches = array())
{
parent::__construct($factory, $conn);
$caches['meta'] = isset($caches['meta']) ? $caches['meta'] : new ArrayCache();
$this->caches = $caches;
$this->keySanitizer = function ($cacheKey) {
return str_replace(' ', '_', $cacheKey);
};
}