# File lib/action_controller/caching.rb, line 303
      def expire_fragment(name, options = {})
        return unless perform_caching

        key = fragment_cache_key(name)

        if key.is_a?(Regexp)
          fragment_cache_store.delete_matched(key, options)
          logger.info "Expired fragments matching: #{key.source}" unless logger.nil?
        else
          fragment_cache_store.delete(key, options)
          logger.info "Expired fragment: #{key}" unless logger.nil?
        end
      end