/** * @param Psn_Model_Rule $rule * @return mixed|void */ protected function _getPreparedSubject(Psn_Model_Rule $rule) { $subject = $rule->getNotificationSubject(); /** * Final subject filter * @param string the email subject */ return IfwPsn_Wp_Proxy_Filter::apply('psn_service_email_subject', $subject, $this); }