Pimcore\Controller\Action\Frontend::getRenderScript PHP Method

    public function getRenderScript()
    {
        // try to get the template out of the params
        if ($this->getParam("template")) {
            return $this->getParam("template");
        }
        // try to get template out of the document object, but only if the parameter `staticroute´ is not set, which indicates
        // if a request comes through a static/custom route (contains the route Object => Staticroute)
        // see PIMCORE-1545
        if ($this->document instanceof Document && !in_array($this->getParam("pimcore_request_source"), ["staticroute", "renderlet"])) {
            if (method_exists($this->document, "getTemplate") && $this->document->getTemplate()) {
                return $this->document->getTemplate();
            }
        }
        return null;
    }