run method
Runs this command.
The return value is wrapped in a Future if necessary and returned by
CommandRunner.runCommand.
Implementation
@override
Future<int> run() async {
Doctor doctor =
Doctor(logger: _logger, cms: argResults?['cms'] as String? ?? 'none');
final bool success = await doctor.diagnose();
return success ? ExitCode.success.code : ExitCode.tempFail.code;
}