="desc" /></colgroup>
    <tr>
      <th>f</th>
      <td><p>The function to promote.</p></td>
    </tr>
    </table>
    

    <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
    <pre class="examples"><div class='input'><span class='co'># This wouldn't make sense as a general legal lens, but fine as a `getter`</span>
<span class='no'>sqrt_l</span> <span class='kw'>&lt;-</span> <span class='fu'>to_l</span>(<span class='no'>sqrt</span>)
<span class='no'>iris_root</spa