ext_localconf.php

<?php

if (!isset($GLOBALS['TYPO3_CONF_VARS']['DB']['additionalQueryRestrictions'][\GeorgRinger\Gdpr\Database\Query\Restriction\GdprRestriction::class])) {
    $GLOBALS['TYPO3_CONF_VARS']['DB']['additionalQueryRestrictions'][\GeorgRinger\Gdpr\Database\Query\Restriction\GdprRestriction::class] = [];
}

$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS'][\TYPO3\CMS\Core\Database\Query\QueryBuilder::class]['addAdditionalWhereConditions'][1521636341]
    = \GeorgRinger\Gdpr\Hooks\QueryBuilderHook::class;

$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['Backend\Template\Components\ButtonBar']['getButtonsHook']['gdpr'] =
    \GeorgRinger\Gdpr\Hooks\ButtonBarHook::class . '->getButtons';

// overlay icon
$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS'][\TYPO3\CMS\Core\Imaging\IconFactory::class]['overrideIconOverlay'][] = \GeorgRinger\Gdpr\Hooks\IconFactoryHook::class;

$extConfiguration = \GeorgRinger\Gdpr\Domain\Model\Dto\ExtensionConfiguration::getInstance();
if ($extConfiguration->getOverloadMediaRenderer()) {
    $rendererRegistry = \TYPO3\CMS\Core\Resource\Rendering\RendererRegistry::getInstance();
    $rendererRegistry->registerRendererClass(\GeorgRinger\Gdpr\Rendering\YoutubeWithConsentRenderer::class);
    $rendererRegistry->registerRendererClass(\GeorgRinger\Gdpr\Rendering\VimeoWithConsentRenderer::class);
}

$iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Imaging\IconRegistry::class);
$icons = [
    'ext-gdpr-form-overview' => 'form-overview.svg',
];
foreach ($icons as $identifier => $path) {
    $iconRegistry->registerIcon(
        $identifier,
        \TYPO3\CMS\Core\Imaging\IconProvider\SvgIconProvider::class,
        ['source' => 'EXT:gdpr/Resources/Public/Icons/' . $path]
    );
}