yargs()
          .command('batman', 'batman command', function (yargs) {
            yargs.command('robin', 'robin command', {}, function (_argv) {
              argv = _argv
            })
          })
          .option('state', {
            default: undefined,
            global: true
          })
          .parse('batman robin --what', {
            state: 'grumpy but rich'
          }, function (_err, argv, _output) {})