Nextras\MailPanel\SessionMailer::deleteOne PHP Метод

    public function deleteOne($messageId)
    {
        $this->requireSessions();
        if (!isset($this->sessionSection->messages[$messageId])) {
            throw new \RuntimeException("Unable to find mail with ID {$messageId}");
        }
        unset($this->sessionSection->messages[$messageId]);
    }