pan class="p">}</span>
<span class="w">    </span><span class="nx">state</span><span class="p">[</span><span class="nx">label</span><span class="p">].</span><span class="nx">push</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span>
<span class="w">  </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div>
</div>
<p>We can now put a call to <code>applyCheck</code> inside the handler for <code>Identifier</code>:</p>
<div class="code-sample lang-js" title="chec