Expanded class hierarchy of CssOptimizer in Drupal 9
- class \Drupal\Core\Asset\CssOptimizer implements AssetOptimizerInterface
- class \Drupal\flysystem\Asset\CssOptimizer
- class \Drupal\flysystem\Asset\CssOptimizer
- class \Drupal\flysystem\Asset\CssOptimizer
- class \Drupal\s3fs\Asset\S3fsCssOptimizer