SilverStripe\Forms\Tests\GridField\GridFieldDetailFormTest\Person:
  joe:
    FirstName: Joe
    Surname: Bloggs
  jane:
    FirstName: Jane
    Surname: Doe
  jack:
    FirstName: Jack
    Surname: Doe

SilverStripe\Forms\Tests\GridField\GridFieldDetailFormTest\PeopleGroup:
  group:
    Name: My Group
    People:
      - =>SilverStripe\Forms\Tests\GridField\GridFieldDetailFormTest\Person.joe
      - =>SilverStripe\Forms\Tests\GridField\GridFieldDetailFormTest\Person.jane

SilverStripe\Forms\Tests\GridField\GridFieldDetailFormTest\Category:
  category1:
    Name: Category 1
    People:
      - =>SilverStripe\Forms\Tests\GridField\GridFieldDetailFormTest\Person.joe
      - =>SilverStripe\Forms\Tests\GridField\GridFieldDetailFormTest\Person.jane