plications which might turn on or off their cloud persistence or collaboration features. This hook can return <code>undefined</code> if the <a href="/api/the-essentials/creating-stores/store/"><code>Store</code></a> is not yet defined, which you should defend against.</p><p>Since v4.3.19, a <code>destroy</code> function can be provided which will be called after an old <a href="/api/the-essentials/persisting-stores/persister/"><code>Persister</code></a> is destroyed due to a change in the <code>createDeps</