hallenge</span><span class="p">(</span><span class="nv">withPayload</span><span class="p">:</span> <span class="n">payload</span><span class="p">,</span> <span class="nv">success</span><span class="p">:</span> <span class="p">{</span>
  <span class="c1">// Success</span>
<span class="p">},</span><span class="nv">failure</span><span class="p">:</span> <span class="p">{</span> <span class="n">error</span> <span class="k">in</span>
  <span class="k">if</span> <span class="k">case</span> <span class="o">.</span