Eva\EvaEngine\Mvc\Controller\ControllerBase::showErrorMessage PHP Method

    public function showErrorMessage($code, $message, $messageType = 'error')
    {
        if (!isset($this->recommendedReasonPhrases[$code])) {
            throw new Exception\InvalidArgumentException(sprintf('No http response code %s supported', $code));
        }
        $this->flashSession->{$messageType}($message->getMessage());
        $this->response->setStatusCode($code, $this->recommendedReasonPhrases[$code]);
        return $this;
    }