text: import Controller from '@ember/controller';
  export default Controller.extend({
    groupedNumbers: [
      { groupName: 'Smalls', options: ['one', 'two', 'three'] },
      { groupName: 'Mediums', options: ['four', 'five', 'six'] },
      { groupName: 'Bigs', options: [
          { groupName: 'Fairly big', options: ['seven', 'eight', 'nine'] },
          { groupName: 'Really big', options: [ 'ten', 'eleven', 'twelve' ] },
          'thirteen'
        ]
      },
      'one hundred',
      'one thousand'
    ]
  });
  