anchor.diff:            exitCode: 1);
       }
   
  -    if (argResults.wasParsed('start')) {
  -      await _startEmulator(argResults['start']);
  +    if (argResults.wasParsed('launch')) {
  +      await _launchEmulator(argResults['launch']);
       } else {
         final String searchText =
             argResults.rest != null && argResults.rest.isNotEmpty
  
positive.code: 
  class EmulatorsCommand extends FlutterCommand {
    EmulatorsCommand() {
      argParser.addOption('start',
          help: 'The full or partial ID of the emulator to start.');
    }
  
    @override
    final String name = 'emulators';
  
    @override
    final String description = 'List and start available emulators.';
  
    @override
    Future<Null> runCommand() async {
  
negative.code:     }
    }
  
    Future<Null> _launchEmulator(String id) async {
      final List<Emulator> emulators =
          await emulatorManager.getEmulatorsMatching(id).toList();
  
  