anchor.diff:  }
   
   void parseArgs(List<String> arguments) {
  +  final String locataionErrorMessage = 'both local-streamy-location and '
  +      'remote-streamy-location simultaneously not supported';
  +
     var errors = <String>[];
     var argp = new ArgParser();
   
  
positive.code:         help: 'display commandline help options',
          negatable: false,
          callback: (bool value) => value ? printUsage() : null
          );
  
      ..addOption(
          'remote-streamy-location',
          help: 'Remote to a git Streamy repository. If specified the remote '
                'version will be used instead of pub version.',
          callback: (String value) {
            if (localStreamyLocation != null && !isBlank(value)) {
              errors.add('cannot set remote-streamy-location if '
                         'local-streamy-location is already set');
              return;
            }
            remoteStreamyLocation = value;
  
negative.code:               'version will be used instead of pub version.',
          callback: (String value) {
            if (remoteStreamyLocation != null && !isBlank(value)) {
              errors.add(locataionErrorMessage);
              return;
            }
            localStreamyLocation = value;
  