title: exception after update primefaces 3.5 to 4.0
body: <p>I'm trying to update the primefaces 3.5 to 4.0 and is launching this exception. </p>
  
  <pre><code>com.sun.faces.config.ConfigurationException: java.lang.Exception: 
  No Function Found on type: org.primefaces.util.ComponentUtils with signature:
  java.lang.String resolveWidgetVar(java.lang.String)
  </code></pre>
  
  <p>Someone knows how to solve?</p>