anchor.diff:  import 'dart:math';
   
   import 'package:sky/mojo/net/fetch.dart';
  +import 'package:sky/mojo/asset_bundle.dart';
   
   // Snapshot from http://www.nasdaq.com/screening/company-list.aspx
   // Fetched 2/23/2014.
  
positive.code:   }
  
    void _fetchNextChunk() {
      fetchBody('../data/stock_data_${_currentChunk++}.json').then((Response response) {
        String json = response.bodyAsString();
        JsonDecoder decoder = new JsonDecoder();
  
  
negative.code: 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;
  