[PHP] TypoScript usage in backend- or comand context

public function initializeForTYPO3VLowerThan10(int $pageUid)
{
    $GLOBALS['TT'] = new TimeTracker();
    $pageRepository = GeneralUtility::makeInstance(PageRepository::class);
    $templateService = GeneralUtility::makeInstance(TemplateService::class);
 
    // get the rootline
    $rootLine = $pageRepository->getRootLine($pageUid);
 
    // initialize template service and generate typoscript configuration
    $templateService->init();
    $templateService->runThroughTemplates($rootLine);
    $templateService->generateConfig();
     
    \TYPO3\CMS\Extbase\Utility\DebuggerUtility::var_dump($templateService, __FILE__ . ':' . __LINE__);
}
 
public function initializeForTYPO3V10(int $pageUid)
{
    $rootlineUtil = GeneralUtility::makeInstance(RootlineUtility::class, [$pageUid]);
    $templateService = GeneralUtility::makeInstance(TemplateService::class);
     
    // get the rootline
    $rootLine = $rootlineUtil->get();
 
    // initialize template service and generate typoscript configuration
    $templateService->runThroughTemplates($rootLine);
    $templateService->generateConfig();
 
    \TYPO3\CMS\Extbase\Utility\DebuggerUtility::var_dump($templateService, __FILE__ . ':' . __LINE__);
}