fragment_name_with_digest

# File actionview/lib/action_view/helpers/cache_helper.rb, line 207
      def fragment_name_with_digest(name, virtual_path) #:nodoc:
        virtual_path ||= @virtual_path
        if virtual_path
          name  = controller.url_for(name).split("://").last if name.is_a?(Hash)
          digest = Digestor.digest name: virtual_path, finder: lookup_context, dependencies: view_cache_dependencies
          [ name, digest ]
        else
          name
        end
      end