AssetCollectionOptimizerInterface

class \Drupal\Core\Asset\CssCollectionOptimizer implements \Drupal\Core\Asset\AssetCollectionOptimizerInterface
class \Drupal\Core\Asset\JsCollectionOptimizer implements \Drupal\Core\Asset\AssetCollectionOptimizerInterface

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.