Persistence DATA(y-leveldb) YJS13

hey good afternoon,
this code it is in utils.js to YJS-13

if (typeof persistenceDir === ‘string’) {
// @ts-ignore
const LevelDbPersistence = require(‘y-leveldb’).LevelDbPersistence
persistence = new LevelDbPersistence(persistenceDir)
}

Is there a level-db for version 13?
or any library to make persistent?