de>, the result of applying <code>predecessor</code> to <code>self</code> <code>-n</code> times
    but not past <code>limit</code>.
  - Otherwise, <code>self</code>.</p>

<p><strong>Requires:</strong> <code>n &gt;= 0</code> if only conforming to <code>ForwardIndexType</code>.</p>

<p><strong>Complexity:</strong>
  - O(1) if conforming to <code>RandomAccessIndexType</code>
  - O(<code>abs(n)</code>) otherwise</p>

    <h4>Declaration</h4>    
    <code class="language-swift">func advancedBy(n: AnyBidirectio