anchor.diff:    }
   
     Future _processReadynessRequest(io.HttpRequest request) async {
  -    if (!commonServerImpl.isRestarting) {
  +    if (!commonServerImpl.isRestarting &&
  +        DateTime.now().isBefore(_serveUntil)) {
         request.response.statusCode = io.HttpStatus.ok;
       } else {
         request.response.statusCode = io.HttpStatus.internalServerError;
  
positive.code:   }
  
    Future _processHealthRequest(io.HttpRequest request) async {
      if (!commonServerImpl.isHealthy) {
        _logger.severe('CommonServer is no longer healthy.'
            ' Intentionally failing health check.');
        request.response.statusCode = io.HttpStatus.internalServerError;
  
negative.code: 
  import 'dart:async';
  import 'dart:io' as io;
  import 'dart:math';
  
  import 'package:appengine/appengine.dart' as ae;
  import 'package:logging/logging.dart';
  