Pimcore\Controller\Action\Admin\Element::getPredefinedPropertiesAction PHP Method

    public function getPredefinedPropertiesAction()
    {
        $properties = [];
        $type = $this->getParam("controller");
        $allowedTypes = ["asset", "document", "object"];
        if (in_array($type, $allowedTypes)) {
            $list = new Model\Property\Predefined\Listing();
            $list->setFilter(function ($row) use($type) {
                if ($row["ctype"] == $type) {
                    return true;
                }
                return false;
            });
            $list->load();
            foreach ($list->getProperties() as $type) {
                $properties[] = $type;
            }
        }
        $this->_helper->json(["properties" => $properties]);
    }