SilverStripe\Forms\Tests\CheckboxSetFieldTest\Tag:
   tag1:
      Title: Tag 1
   tag2:
      Title: Tag 2
   tag3:
      Title: Tag 3
SilverStripe\Forms\Tests\CheckboxSetFieldTest\Article:
   articlewithouttags:
      Content: Article 1
   articlewithtags:
      Content: Article 2
      Tags:
        - =>SilverStripe\Forms\Tests\CheckboxSetFieldTest\Tag.tag1
        - =>SilverStripe\Forms\Tests\CheckboxSetFieldTest\Tag.tag2