    # File lib/yard/templates/helpers/html_helper.rb, line 228
          def link_file(filename, title = nil, anchor = nil)
            if CodeObjects::ExtraFileObject === filename
              file = filename
            else
              contents = File.file?(filename) ? nil : ''
              file = CodeObjects::ExtraFileObject.new(filename, contents)
            end
            return title || file.title unless serializer
            link_url(url_for_file(file, anchor), title || file.title)
          end