public static function registerIcons()
    {
        $iconRegistry = GeneralUtility::makeInstance(IconRegistry::class);
        $iconRegistry->registerIcon(
            'brand-amazon',
            FontawesomeIconProvider::class,
            ['name' => 'amazon']
        );
        $iconRegistry->registerIcon(
            'brand-paypal',
            FontawesomeIconProvider::class,
            ['name' => 'paypal']
        );
        $iconRegistry->registerIcon(
            'documentation-book',
            FontawesomeIconProvider::class,
            ['name' => 'book']
        );
        $iconRegistry->registerIcon(
            'brand-patreon',
            SvgIconProvider::class,
            [
                'source' => 'EXT:staticfilecache/Resources/Public/Icons/Patreon.svg',
            ]
        );
    }