 console<span class="punctuation">.</span><span class="function">error</span><span class="punctuation">(</span><span class="string">'Persistence error:'</span><span class="punctuation">,</span> error<span class="punctuation">)</span><span class="punctuation">,</span>
    <span class="punctuation">)</span><span class="punctuation">;</span>
    <span class="keyword">return</span> persister<span class="punctuation">;</span>
  <span class="punctuation">}</span>
<span class="punctuation">}</span>
</code></pre><p