lass="punctuation">(</span>store<span class="operator">:</span> <span class="type"><a href="/api/persisters/type-aliases/mergeable/persistedstore/">PersistedStore</a></span><span class="operator">&lt;</span>Persist<span class="operator">></span><span class="punctuation">)</span> <span class="operator">=></span> PersisterOrUndefined <span class="operator">|</span> <span class="builtin">Promise</span><span class="operator">&lt;</span>PersisterOrUndefined<span class="operator">></span><span class="punctuation"