silverstripe-framework/tests/php/ORM/DataObjectSchemaTest/WithRelation.php

<?php

namespace SilverStripe\ORM\Tests\DataObjectSchemaTest;

class WithRelation extends NoFields
{
    private static $table_name = 'DataObjectSchemaTest_WithRelation';

    private static $has_one = [
        'Relation' => HasFields::Class
    ];
}