anchor.diff:          help: 'disable all completion features', defaultsTo: false, hide: true);
       parser.addFlag(DISABLE_SERVER_FEATURE_SEARCH,
           help: 'disable all search features', defaultsTo: false, hide: true);
  -    parser.addOption(INSTRUMENTATION_LOG_FILE,
  -        valueHelp: 'file path',
  -        help: 'write instrumentation data to the given file');
       parser.addFlag(INTERNAL_PRINT_TO_CONSOLE,
           help: 'enable sending `print` output to the console',
           defaultsTo: false,
  -        negatable: false);
  -    parser.addOption(NEW_ANALYSIS_DRIVER_LOG,
  -        valueHelp: 'path',
  -        help: "set a destination for the new analysis driver's log");
  +        negatable: false,
  +        hide: true);
  +
       parser.addFlag(ANALYTICS_FLAG,
           help: 'enable or disable sending analytics information to Google',
           hide: !telemetry.SHOW_ANALYTICS_UI);
  
positive.code:   CommandLineParser _createArgParser() {
      var parser = CommandLineParser();
      parser.addFlag(HELP_OPTION,
          help: 'print this help message without starting a server',
          abbr: 'h',
          defaultsTo: false,
          negatable: false);
      parser.addOption(CLIENT_ID,
          valueHelp: 'name', help: 'an identifier used to identify the client');
      parser.addOption(CLIENT_VERSION,
          valueHelp: 'version', help: 'the version of the client');
      parser.addFlag(DISABLE_SERVER_EXCEPTION_HANDLING,
          // TODO(jcollins-g): Pipeline option through and apply to all
          // exception-nullifying runZoned() calls.
  
negative.code:         negatable: false,
          help: 'suppress analytics for this session',
          hide: !telemetry.SHOW_ANALYTICS_UI);
  
      parser.addOption(TRAIN_USING,
          valueHelp: 'path',
          help: 'Pass in a directory to analyze for purposes of training an '
              'analysis server snapshot.');
  
      parser.addFlag(ENABLE_COMPLETION_MODEL,
          help: 'Whether or not to turn on ML ranking for code completion.');
      parser.addOption(COMPLETION_MODEL_FOLDER,
          valueHelp: 'path',
          help: 'Path to the location of a code completion model.');
  
      //
      // Temporary flags.
  