anchor.diff:  typedef void StockDataCallback(StockData data);
   const _kChunkCount = 30;
   
  +String _urlToFetch(int chunk) {
  +  if (rootBundle == null)
  +    return '../data/stock_data_${chunk}.json';
  +  return 'https://domokit.github.io/example/stocks/data/stock_data_${chunk}.json';
  +}
  +
   class StockDataFetcher {
     int _currentChunk = 0;
     final StockDataCallback callback;
  
positive.code: import 'dart:math';
  
  import 'package:sky/mojo/net/fetch.dart';
  
  // Snapshot from http://www.nasdaq.com/screening/company-list.aspx
  // Fetched 2/23/2014.
  
negative.code:   }
  
    void _fetchNextChunk() {
      fetchBody(_urlToFetch(_currentChunk++)).then((Response response) {
        String json = response.bodyAsString();
        JsonDecoder decoder = new JsonDecoder();
  
  