ext_tables.php

<?php
defined('TYPO3_MODE') or die();

/** @noinspection PhpUndefinedVariableInspection */
$extensionConfiguration = unserialize($GLOBALS['TYPO3_CONF_VARS']['EXT']['extConf'][$_EXTKEY]);

switch ($extensionConfiguration['typoscriptComplexity']) {
    case 'maximal':
        \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
            $_EXTKEY,
            'Configuration/TypoScript/maximal/',
            'Feuser Register [maximal]'
        );
        break;
    case 'minimal':
        // fall through intended
    default:
        \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
            $_EXTKEY,
            'Configuration/TypoScript/minimal/',
            'Feuser Register [minimal]'
        );
}


/**
 * Page TypoScript for mod wizards
 */
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPageTSConfig(
    '<INCLUDE_TYPOSCRIPT: source="FILE:EXT:' . $_EXTKEY . '/Configuration/TsConfig/ModWizards.ts">'
);


try {
    /**
     * Cache manager
     *
     * @var \TYPO3\CMS\Core\Cache\CacheManager $cacheManager
     */
    $cacheManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Cache\CacheManager::class);
    // Reflection cache
    if (!$cacheManager->hasCache(SFREGISTERCACHEIDENTIFIER)) {
        /**
         * TYPO3 cache factory
         *
         * @var \TYPO3\CMS\Core\Cache\CacheFactory $typo3CacheFactory
         */
        $typo3CacheFactory = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(
            \TYPO3\CMS\Core\Cache\CacheFactory::class,
            'production',
            $cacheManager
        );
        $typo3CacheFactory->create(
            SFREGISTERCACHEIDENTIFIER,
            $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations'][SFREGISTERCACHEIDENTIFIER]['frontend'],
            $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations'][SFREGISTERCACHEIDENTIFIER]['backend'],
            $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations'][SFREGISTERCACHEIDENTIFIER]['options']
        );
    }
} catch (Exception $exeption) {
    \TYPO3\CMS\Core\Utility\GeneralUtility::devLog('Can not create cache ' . SFREGISTERCACHEIDENTIFIER, $_EXTKEY, 2);
}