silverstripe-framework/tests/php/ORM/VersionedOwnershipTest/RelatedMany.php

<?php

namespace SilverStripe\ORM\Tests\VersionedOwnershipTest;

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

/**
 * Object which is owned by a has_one object
 *
 * @mixin Versioned
 */
class RelatedMany extends DataObject implements TestOnly
{
	private static $extensions = array(
		Versioned::class,
	);

	private static $table_name = 'VersionedOwnershipTest_RelatedMany';

	private static $db = array(
		'Title' => 'Varchar(255)',
	);

	private static $has_one = array(
		'Page' => Subclass::class,
	);

	private static $owned_by = array(
		'Page'
	);
}