// Plugin "validator".
$TCA['tt_content']['types']['list']['subtypes_excludelist'][$_EXTKEY . '_validator'] = 'layout,select_key,pages,recursive';
$TCA['tt_content']['types']['list']['subtypes_addlist'][$_EXTKEY . '_validator'] = 'pi_flexform';
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPlugin(array('LLL:EXT:dlf/locallang.xml:tt_content.dlf_validator', $_EXTKEY . '_validator'), 'list_type');
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPiFlexFormValue($_EXTKEY . '_validator', 'FILE:EXT:' . $_EXTKEY . '/plugins/validator/flexform.xml');
// Register modules.
if (TYPO3_MODE == 'BE') {
    // Add modules after "web".
    if (!isset($TBE_MODULES['txdlfmodules'])) {
        $modules = array();
        foreach ($TBE_MODULES as $key => $val) {
            if ($key == 'web') {
                $modules[$key] = $val;
                $modules['txdlfmodules'] = '';
            } else {
                $modules[$key] = $val;
            }
        }
        $TBE_MODULES = $modules;
        unset($modules);
    }
    // Main "dlf" module.
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addModule('txdlfmodules', '', '', \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::extPath($_EXTKEY) . 'modules/');
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addNavigationComponent('txdlfmodules', 'typo3-pagetree');
    // Module "indexing".
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addModule('txdlfmodules', 'txdlfindexing', '', \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::extPath($_EXTKEY) . 'modules/indexing/');
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addLLrefForTCAdescr('_MOD_txdlfmodules_txdlfindexing', 'EXT:dlf/modules/indexing/locallang_mod.xml');
    // Module "newclient".
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addModule('txdlfmodules', 'txdlfnewclient', '', \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::extPath($_EXTKEY) . 'modules/newclient/');
    \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addLLrefForTCAdescr('_MOD_txdlfmodules_txdlfnewclient', 'EXT:dlf/modules/newclient/locallang_mod.xml');
}