public function getAcceptedTypes()
    {
        return $this->getCachedProperty(
            'accept',
            function () {
                $result = [];
                /** @var \DOMNodeList $nodes */
                // No REQUIRED — no exception.
                $nodes = $this->query('app:accept');
                foreach ($nodes as $value) {
                    $result[] = trim($value->textContent);
                }

                return $result;
            }
        );
    }