an> <span class="type"><a href="/api/the-essentials/creating-stores/store/">Store</a></span> <span class="operator">|</span> <span class="type"><a href="/api/mergeable-store/interfaces/mergeable/mergeablestore/">MergeableStore</a></span></code></pre><div class="table"><table><tr><th class="right">returns</th><td><code><span class="type"><a href="/api/the-essentials/creating-stores/store/">Store</a></span> <span class="operator">|</span> <span class="type"><a href="/api/mergeable-store/interfaces/mergeable/m