AclHelper::beforeRender PHP Method

    public function beforeRender($viewFile)
    {
        // display upgrade link when required
        $key = AuthComponent::$sessionKey . '.aclUpgrade';
        if ($this->_View->Session->read($key)) {
            $link = $this->_View->Croogo->adminAction(__d('croogo', 'Upgrade Acl database'), array('controller' => 'acl_permissions', 'action' => 'upgrade'), array('button' => 'primary'));
            $this->_View->Blocks->append('actions', $link);
        }
    }