anchor.diff:  
     Future<Resource> _gatherChildren(Container container) {
       chrome_gen.DirectoryEntry dir = container._entry;
  -    List<Future> futures = [];
  +    List futures = [];
   
       return dir.createReader().readEntries().then((entries) {
         for (chrome_gen.Entry ent in entries) {
  
positive.code:   }
  
    List<Project> getProjects() {
      var list = <Project>[];
      for (var child in _children) {
        if (child is Project) list.add(child);
      }
  
negative.code:   }
  
    List<File> getFiles() {
      List list = [];
      for (var child in _children) {
        if (child is File) list.add(child);
      }
  