Typo3: t3lib_install is removed from typo3 core

Question

I am trying to create an instance of 't3lib_install' And if my investigation is correct , t3lib_install is removed from typo3 core.

So can any one of you guys please help me to find out the replacement for this class .

    $instObj = t3lib_div::makeInstance('t3lib_install');
    $instObj->allowUpdateLocalConf = 1;
    $instObj->updateIdentity = 'xxxxxx';
    // Get lines from localconf file
    $lines = $instObj->writeToLocalconf_control();
    $instObj->setValueInLocalconfFile($lines, '$TYPO3_CONF_VARS[\'EXT\'][\'extConf\'][\'xxxxxx\']', 
    serialize($LocalconfValues));
    $instObj->writeToLocalconf_control($lines);

Answer 1

Thanks for the tip .

$this->objectManager = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Extbase\\Object\\ObjectManager');
$instObj = $this->objectManager->get('TYPO3\\CMS\\Core\\Configuration\\ConfigurationManager');
$lines = $instObj->getLocalConfigurationFileLocation();
// Get lines from Localconfiguration.php file
$localConfigurationArray = require $lines;
$instObj->removeLocalConfigurationKeysByPath( array( 'EXT/extConf/extension_key' ) ) ;
$instObj->setLocalConfigurationValueByPath( 'EXT/extConf/extension_key' ,      serialize($LocalconfValues) );

By this way we can overwrite values stored in Localconfiguration.php