Prado\Web\UI\TControl::onPreRender PHP Method

    public function onPreRender($param)
    {
        $this->raiseEvent('OnPreRender', $this, $param);
    }

 /**
  * Calls the client script manager to add each of the requested client
  * script libraries.
  * @param mixed event parameter
  */
 public function onPreRender($param)
 {
     parent::onPreRender($param);
     $scripts = preg_split('/,|\\s+/', $this->getPradoScripts());
     $cs = $this->getPage()->getClientScript();
     foreach ($scripts as $script) {
         if (($script = trim($script)) !== '') {
             $cs->registerPradoScript($script);
         }
     }
 }