<pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">typealias</span> <span class="kt">Completion</span> <span class="o">=</span> <span class="p">(</span><span class="n">_</span> <span class="nv">url</span><span class="p">:</span> <span class="kt">URL</span><span class="p">,</span> <span class="n">_</span> <span class="nv">response</span><span class="p">:</span> <span class="kt">OGResponse</span><span class="p">?,</span> <span class="n">_</span> <span class="nv">error</span><sp