anchor.diff:  
   final Logger _logging = new Logger('sky_tools.run_mojo');
   
  +enum _MojoConfig { Debug, Release }
  +
   class RunMojoCommand extends Command {
     final name = 'run_mojo';
     final description = 'Run a Flutter app in mojo.';
     RunMojoCommand() {
       argParser.addFlag('android', negatable: false, help: 'Run on an Android device');
  +    argParser.addFlag('checked', negatable: false, help: 'Run Flutter in checked mode');
       argParser.addFlag('mojo-debug', negatable: false, help: 'Use Debug build of mojo');
       argParser.addFlag('mojo-release', negatable: false, help: 'Use Release build of mojo (default)');
   
  
positive.code:       _logging.severe('Cannot specify both --mojo-debug and --mojo-release');
        return 1;
      }
      String appPath = await _makePathAbsolute(argResults['app']);
      if (argResults['android']) {
        return _runAndroid(argResults, appPath);
      } else {
        return _runLinux(argResults, appPath);
      }
    }
  }
  
negative.code: import 'dart:async';
  import 'dart:io';
  
  import 'package:args/command_runner.dart';
  import 'package:logging/logging.dart';
  import 'package:path/path.dart' as path;
  