anchor.diff:          negatable: false,
           hide: true);
   
  -    parser.addFlag(ANALYTICS_FLAG,
  -        help: 'enable or disable sending analytics information to Google',
  -        hide: !telemetry.SHOW_ANALYTICS_UI);
  -    parser.addFlag(SUPPRESS_ANALYTICS_FLAG,
  -        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.');
  -
  -    //
  -    // Deprecated options - no longer read from.
  +    //
  +    // Hidden; these are deprecated and no longer read from.
       //
   
       // Removed 11/15/2020.
  
positive.code: 
    /// The name of the option used to cause instrumentation to also be written to
    /// a local file.
    static const String INSTRUMENTATION_LOG_FILE = 'instrumentation-log-file';
  
    /// The name of the option used to specify if [print] should print to the
    /// console instead of being intercepted.
    static const String INTERNAL_PRINT_TO_CONSOLE = 'internal-print-to-console';
  
    /// The name of the option used to describe the new analysis driver logger.
    static const String NEW_ANALYSIS_DRIVER_LOG = 'new-analysis-driver-log';
  
    /// The option for specifying the http diagnostic port.
    /// If specified, users can review server status and performance information
    /// by opening a web browser on http://localhost:<port>
    static const String PORT_OPTION = 'port';
  
    /// The path to the SDK.
    static const String SDK_OPTION = 'sdk';
  
    /// The path to the data cache.
    static const String CACHE_FOLDER = 'cache';
  
negative.code:   }
  
    String _getSdkPath(ArgResults args) {
      if (args[DART_SDK] != null) {
        return args[DART_SDK];
      } else if (args[DART_SDK_ALIAS] != null) {
        return args[DART_SDK_ALIAS];
      } else {
        return getSdkPath();
      }
  