` tag * @param ?int $oldid What oldid revision, if any, to base the request from (default: `null`) * @param bool $stash Whether to stash the result in the server-side cache (default: `false`) * * @return array An array containing the keys 'body', 'headers', and optionally 'error' */ public function transformWikitext( PageIdentity $page, Language $targetLanguage, string $wikitext, bool $bodyOnly, ?int $oldid, bool $stash ): array; }