protected function _actorConfig(KObjectConfig $config)
    {
        $objectName = $this->getAuthor()->getName();
        $translate  = false;

        if (!$this->created_by)
        {
            $objectName = 'Guest user';
            $translate  = true;
        }
        elseif (!$this->_findActivityActor())
        {
            $objectName = 'Deleted user';
            $translate  = true;
        }

        $config->append(array(
            'type' => array('objectName' => 'user', 'object' => true),
            'id'         => $this->created_by,
            'url'        => 'option=com_users&task=user.edit&id=' . $this->created_by,
            'objectName' => $objectName,
            'translate'  => $translate,
            'find'       => 'actor'
        ));
    }