anchor.diff:      // Cache is empty or it's been a while since the last server ping. Ping the server.
       try {
         final DateTime remoteFrameworkCommitDate = DateTime.parse(
  -        await FlutterVersion.fetchRemoteFrameworkCommitDate(channel),
  +        await FlutterVersion.fetchRemoteFrameworkCommitDate(),
         );
         await versionCheckStamp.store(
           newTimeVersionWasChecked: now,
  
positive.code:   ///
    /// Throws [VersionCheckError] if a git command fails, for example, when the
    /// remote git repository is not reachable due to a network issue.
    static Future<String> fetchRemoteFrameworkCommitDate(String branch) async {
      try {
        // Fetch upstream branch's commit and tags
        await _run(<String>['git', 'fetch', '--tags']);
  
negative.code: 
    /// Execute validations and print warning to [logger] if necessary.
    Future<void> run() async {
      // Get whether there's a newer version on the remote. This only goes
      // to the server if we haven't checked recently so won't happen on every
      // command.
  