anchor.diff:    }
   
     Future<AnalysisResult> runFirstPhase() async {
  +    // Process package
  +    _task.processPackage(context.contextRoot.root);
  +
  +    var analysisErrors = <AnalysisError>[];
  +
       // All tasks should be registered; [numPhases] should be finalized.
       _progressBar = _ProgressBar(_migrationCli.logger, pathsToProcess.length);
  -
  -    // Process package
  -    _task.processPackage(context.contextRoot.root);
  -
  -    var analysisErrors = <AnalysisError>[];
   
       // Process each source file.
       await processResources((ResolvedUnitResult result) async {
  
positive.code:       return;
      }
      _tickCount++;
      var fractionComplete = _tickCount * _innerWidth ~/ _totalTickCount - 1;
      var remaining = _innerWidth - fractionComplete - 1;
      _logger.write('\r[' + // Bring cursor back to the start of the line.
          '-' * fractionComplete + // Print complete work.
  
negative.code: 
  import 'dart:async';
  import 'dart:convert' show jsonDecode;
  import 'dart:math';
  import 'dart:io' hide File;
  
  import 'package:analyzer/dart/analysis/analysis_context_collection.dart';
  