anchor.diff:  /// Still very much a WIP.
   class AnalysisDriver {
   
  -  /// The maximum number of sources for which AST structures should be kept
  -  /// in the cache.
  -  // TODO: move to DriverOptions
  -  static const _MAX_CACHE_SIZE = 512;
  -
     final DriverOptions _options;
   
     final int _startTime;
  
positive.code: 
  class DriverOptions {
  
    /// The path to the dart SDK.
    String dartSdkPath;
  
  
negative.code:   }
  
    void _setOptions(AnalysisOptionsImpl analysisOptions) {
      analysisOptions.cacheSize = _options.cacheSize;
      analysisOptions.hint = !_options.disableHints;
      analysisOptions.lint = _options.enableLints;
    }
  