an class="punctuation">}</span><span class="punctuation">;</span>
  synchronizer<span class="operator">?</span><span class="operator">:</span> <span class="type"><a href="/api/the-essentials/synchronizing-stores/synchronizer/">Synchronizer</a></span><span class="punctuation">;</span>
  synchronizersById<span class="operator">?</span><span class="operator">:</span> <span class="punctuation">{</span><span class="punctuation">[</span>synchronizerId<span class="operator">:</span> <span class="type"><a href="/ap