silverstripe-framework/tests/php/Dev/FixtureFactoryTest/DataObjectRelation.php

<?php

namespace SilverStripe\Dev\Tests\FixtureFactoryTest;

use SilverStripe\Dev\TestOnly;
use SilverStripe\ORM\DataObject;

class DataObjectRelation extends DataObject implements TestOnly
{
    private static $db = [
        "Name" => "Varchar"
    ];

    private static $table_name = 'FixtureFactoryTest_DataObjectRelation';

    private static $belongs_many_many = [
        "TestParent" => TestDataObject::class
    ];

    private static $has_one = [
        'MyParent' => TestDataObject::class
    ];
}