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: typedef void StockDataCallback(StockData data);
  const _kChunkCount = 30;
  
  class StockDataFetcher {
    int _currentChunk = 0;
    final StockDataCallback callback;
  
negative.code:   }
  
    void _fetchNextChunk() {
      fetchBody(_urlToFetch(_currentChunk++)).then((Response response) {
        String json = response.bodyAsString();
        JsonDecoder decoder = new JsonDecoder();
  
  