protected function getDynamicParams()
    {
        if (is_null($this->dynamicParams))
        {
            $this->dynamicParams = [
                'siteUrl'       => UrlHelper::siteUrl(),
                'cpTrigger'     => Craft::$app->config->general->cpTrigger,
                'actionTrigger' => Craft::$app->config->general->actionTrigger,
            ];
        }

        return $this->dynamicParams;
    }