    # File lib/yard/templates/helpers/html_helper.rb, line 342
          def url_for_file(filename, anchor = nil)
            return '' unless serializer
            fromobj = object
            if CodeObjects::Base === fromobj && !fromobj.is_a?(CodeObjects::NamespaceObject)
              fromobj = fromobj.namespace
            end
            from = serializer.serialized_path(fromobj)
            if filename == options.readme
              path = 'index.html'
            else
              path = serializer.serialized_path(filename)
            end
            link = File.relative_path(from, path)
            link += (anchor ? '#' + urlencode(anchor) : '')
            link
          end