private function registerOptimizers()
    {
        ImagerService::registerOptimizer('jpegoptim', JpegoptimOptimizer::class);
        ImagerService::registerOptimizer('jpegtran', JpegtranOptimizer::class);
        ImagerService::registerOptimizer('mozjpeg', MozjpegOptimizer::class);
        ImagerService::registerOptimizer('optipng', OptipngOptimizer::class);
        ImagerService::registerOptimizer('pngquant', PngquantOptimizer::class);
        ImagerService::registerOptimizer('gifsicle', GifsicleOptimizer::class);
        ImagerService::registerOptimizer('tinypng', TinypngOptimizer::class);
        ImagerService::registerOptimizer('kraken', KrakenOptimizer::class);
        ImagerService::registerOptimizer('imageoptim', ImageoptimOptimizer::class);
    }