n>checkpointsId<span class="operator">:</span> <span class="type"><a href="/api/common/type-aliases/identity/id/">Id</a></span><span class="punctuation">]</span><span class="operator">:</span> <span class="type"><a href="/api/checkpoints/interfaces/checkpoints/checkpoints/">Checkpoints</a></span><span class="punctuation">}</span><span class="punctuation">;</span>
  persister<span class="operator">?</span><span class="operator">:</span> <span class="type"><a href="/api/persisters/type-aliases/mergeable/anype