anchor.diff:        sdkPath: sdkManager.defaultSdkDirectory,
       );
   
  -    for (var analysisContext in _collection.contexts) {
  +    for (var analysisContext in collection.contexts) {
         var driver = analysisContext.driver;
   
         callbacks.listenAnalysisDriver(driver);
  
positive.code:   final InstrumentationService _instrumentationService;
  
    @override
    ContextManagerCallbacks callbacks;
  
    @override
    final Map<Folder, AnalysisDriver> driverMap =
  
negative.code:   /// Does nothing if the [driver] is not in a Bazel workspace.
    void _watchBazelFilesIfNeeded(Folder folder, AnalysisDriver analysisDriver) {
      if (!experimentalEnableBazelWatching) return;
      var workspace = analysisDriver.analysisContext?.contextRoot.workspace;
      if (workspace is BazelWorkspace &&
          !bazelSearchSubscriptions.containsKey(folder)) {
        var searchSubscription = workspace.bazelCandidateFiles.listen(
  