<span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
            <span class="nv">fileURL</span><span class="p">:</span> <span class="kt">URL</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
            <span class="nv">error</span><span class="p">:</span> <span class="kt">Error</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">)</span></code></pre>

  