></span> <span class="op"><a href="../reference/pipe.html">%&gt;%</a></span> </span>
<span>  <span class="co"># the `age` column is in the cgd dataset: </span></span>
<span>  <span class="fu">age_restrict</span><span class="op">(</span><span class="va">age</span>, max_age <span class="op">=</span> <span class="fl">30</span><span class="op">)</span> <span class="op"><a href="../reference/pipe.html">%&gt;%</a></span></span>
<span>  <span class="co"># demonstrating that this works in 2 stages</span></span>
<sp