title: Custom style in PrimeNG component
body: <p>How to add some custom style in this html code:</p>
  
  <pre><code> &lt;p-tieredMenu #menu [model]="items" [popup]="true"&gt;&lt;/p-tieredMenu&gt;
  </code></pre>
  
  <p>I would to change a <code>.ui-menu{}</code> and something else. How implement this? </p>