$keys * @param EntryType $default * @return iterable */ public function getMultiple(iterable $keys, $default = null): iterable; /** * @param iterable $values * @param null|int|DateInterval $ttl */ public function setMultiple(iterable $values, null|int|DateInterval $ttl = null): bool; /** * @param iterable $keys */ public function deleteMultiple(iterable $keys): bool; }