config_css-8.x-1.0-alpha1/config_css.services.yml

services:
  # We define a separate cache for the asset resolver so we can clear it out.
  cache.css_config_asset_resolver:
    class: Drupal\Core\Cache\CacheBackendInterface
    tags:
      - { name: cache.bin }
    factory: cache_factory:get
    arguments: [css_config_asset_resolver]