Getting typoscript in Backend

gistfile1.txt

    /**
     * Works with:
     *
     * module.tx_extensionname_pluginname < plugins.tx_extensionname_pluginname
     * 
     * @return void
     */
    protected function initializeTypoScript()
    {
        /** @var \TYPO3\CMS\Extbase\Object\ObjectManager $objectManager */
        $objectManager = GeneralUtility::makeInstance('TYPO3\\CMS\\Extbase\\Object\\ObjectManager');
        /** @var \TYPO3\CMS\Extbase\Configuration\BackendConfigurationManager $configurationManager */
        $configurationManager = $objectManager->get(
            'TYPO3\\CMS\\Extbase\\Configuration\\BackendConfigurationManager'
        );
        $configuration = $configurationManager->getConfiguration('ExtensionName', 'pluginame');

        $this->settings = $configuration['settings'];
        $this->viewConfig = $configuration['view'];
    }