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                  <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">struct</span> <span class="kt">Leading</span> <span class="p">:</span> <span class="kt"><a href="../Protocols/RectBasedConstraint.html">RectBasedConstraint</a></span><span class="p">,</span> <span class="kt"><a href="../Protocols/Extensible.html">Extensible</a></span></code></pre>

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            <p>Undocumented</p>

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