class="nv">delegate</span><span class="p">;</span></code></pre>

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                        <div class="language">
                          <p class="aside-title">Swift</p>
                          <pre class="highlight"><code><span class="kd">func</span> <span class="nf">subscribe</span><span class="p">(</span><span class="n">_</span> <span class="nv">delegate</span><span class="p">:</span> <span class="kt"><a href="../Pro