feMutablePointer&lt;Element>) throws -> R) rethrows -> R</a> <span class="required">Required</span><div class="comment collapse in" id="comment-withUnsafeMutablePointerToElements-2a5c4b52159d79ad229e62316819cedc"><p>Call <code>body</code> with an <code>UnsafeMutablePointer</code> to the <code>Element</code>
storage.</p>
<blockquote>
<p>Note:
This pointer is valid only for the duration of the call to <code>body</code>.</p>
</blockquote>
<h4>Declaration</h4><code class="language-swift">@inlinable final public