anchor.diff:  import 'package:analyzer/src/context/builder.dart';
   import 'package:analyzer/src/dart/analysis/byte_store.dart';
   import 'package:analyzer/src/dart/analysis/driver.dart';
  -import 'package:analyzer/src/dart/analysis/file_byte_store.dart';
   import 'package:analyzer/src/dart/analysis/file_state.dart';
   import 'package:analyzer/src/dart/sdk/sdk.dart';
   import 'package:analyzer/src/generated/constant.dart';
  
positive.code:           scheduler,
            log,
            resourceProvider,
            options.useAnalysisDriverMemoryByteStore
                ? analysisDriverMemoryByteStore
                : analysisDriverFileByteStore,
            new FileContentOverlay(),
            'test',
            context.sourceFactory,
  
negative.code:       new PerformanceTag("Driver._analyzeAll");
  
    static ByteStore analysisDriverMemoryByteStore = new MemoryByteStore();
  
    /// The plugins that are defined outside the `analyzer_cli` package.
    List<Plugin> _userDefinedPlugins = <Plugin>[];
  