anchor.diff:        args = argsFile.readAsLinesSync();
       }
   
  +    bool verbose = args.contains('-v') || args.contains('--verbose');
  +    bool hide = !verbose;
  +
       args = args.expand((String arg) => arg.split('=')).toList();
       var parser = new CommandLineParser()
         ..addFlag('batch',
  
positive.code:           help: 'Writes a performance report to the given file (experimental).')
        ..addFlag('help',
            abbr: 'h',
            help: 'Display this help message.',
            defaultsTo: false,
            negatable: false)
        ..addOption('url-mapping',
            help: '--url-mapping=libraryUri,/path/to/library.dart directs the '
                'analyzer to use "library.dart" as the source for an import '
  
negative.code:           help: 'Enable Bazel persistent worker mode.',
            defaultsTo: false,
            negatable: false,
            hide: hide)
        ..addOption('build-analysis-output',
            help:
                'Specifies the path to the file where analysis results should be written.',
            hide: hide)
        ..addFlag('build-mode',
            // TODO(paulberry): add more documentation.
            help: 'Enable build mode.',
            defaultsTo: false,
            negatable: false,
            hide: hide)
        ..addOption('build-summary-input',
            help: 'Path to a summary file that contains information from a '
                'previous analysis run.  May be specified multiple times.',
            allowMultiple: true,
            hide: hide)
        ..addOption('build-summary-output',
            help: 'Specifies the path to the file where the full summary '
                'information should be written.',
            hide: hide)
        ..addOption('build-summary-output-semantic',
            help: 'Specifies the path to the file where the semantic summary '
                'information should be written.',
            hide: hide)
        ..addFlag('build-summary-only',
            help: 'Disable analysis (only generate summaries).',
            defaultsTo: false,
            negatable: false,
            hide: hide)
        ..addFlag('build-summary-only-ast',
            help: 'deprecated -- Generate summaries using ASTs.',
            defaultsTo: false,
            negatable: false,
            hide: hide)
        ..addFlag('build-summary-only-diet',
            help: 'Diet parse function bodies.',
            defaultsTo: false,
            negatable: false,
            hide: hide)
        ..addFlag('build-summary-exclude-informative',
            help: 'Exclude @informative information (docs, offsets, etc).  '
                'Deprecated: please use --build-summary-output-semantic instead.',
            defaultsTo: false,
            negatable: false,
            hide: hide)
        ..addFlag('build-suppress-exit-code',
            help: 'Exit with code 0 even if errors are found.',
            defaultsTo: false,
            negatable: false,
            hide: hide)
        //
        // Hidden flags.
        //
  