a or Strings can be read in, and URLs can be parsed.</p>
<h3 id='usage-example' class='heading'>Usage Example:</h3>
<pre class="highlight swift"><code><span class="c1">//The `ClientResponse` object that describes the response that was received from the remote server is used in a callback.</span>
<span class="kd">public</span> <span class="kd">typealias</span> <span class="kt">Callback</span> <span class="o">=</span> <span class="p">(</span><span class="kt">ClientResponse</span><span class="p">?)</span> <spa