unc-reservecapacity_">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-reservecapacity_">mutating func reserveCapacity(<wbr>_:)</a>
     <span class="required">Required</span>    
<div class="comment collapse" id="comment-func-reservecapacity_"><div class="p">
    <p>A non-binding request to ensure <code>n</code> elements of available storage.</p>

<p>This works as an optimization to avoid multiple reallocations of
linear data structures like <code>Array</code>.  Conforming types may
reser