pen</span> <span class="kd">func</span> <span class="nf">configure</span><span class="p">(</span><span class="n">_</span> <span class="nv">closure</span><span class="p">:</span> <span class="p">(</span><span class="kt">BaseRequest</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Void</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="k">Self</span></code></pre>

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