ires:</strong> No preceding call to <code>self.next()</code> has returned <code>nil</code>.</p>

    <h4>Declaration</h4>    
    <code class="language-swift">mutating func next() -&gt; Elements._Element?</code>
    
    
</div></div>
</div>
<div class="declaration inherited" id="func-prefix_">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-prefix_">func prefix(<wbr>_:)</a>
        
<div class="comment collapse" id="comment-func-prefix_"><div class="p">
    <p>Returns a subsequence, up to