TYPO3 Core

protected function simulateFrontendEnvironment() {

$this->tsfeBackup = isset($GLOBALS['TSFE']) ? $GLOBALS['TSFE'] : NULL;

$GLOBALS['TSFE'] = new \stdClass();

$GLOBALS['TSFE']->tmpl = new \stdClass();

$GLOBALS['TSFE']->tmpl->setup = $this->configurationManager->getConfiguration(\TYPO3\CMS\Extbase\Configuration\ConfigurationManagerInterface::CONFIGURATION_TYPE_FULL_TYPOSCRIPT);

}