title: How to block showing p:growl message in primefaces
body: <p>I have defined a <code>p:growl</code> in my <code>xhtml</code> page like this:</p>
  
  <pre><code>&lt;p:growl id="growl" showDetail="true" /&gt;.
  </code></pre>
  
  <p>When submit my form shows an error message for the required field when they are empty. And it highlights the required field with a red border. 
  So I need highlighting part but don't want to show <code>p:growl</code>. But <code>p:growl</code> component is used for another purpose. How can I block showing
  <code>p:growl</code> when required field is empty?</p>